Tip #8 : Implement metered billing with Google Sheet

Tip #8 : Implement metered billing with Google Sheet

Hello everyone,

We've been sharing a tip every week to address specific business scenarios which can be implemented for your subscription business. Last week, we shared a tip about integrating online form builders with Zoho Subscriptions. This week, we will be looking at how you can implement metered billing in Zoho Subscriptions with Google Sheet.

Business Scenario:

Metered Billing  is the concept of charging your customers based on their usage of a product of service. With Zoho Subscriptions, you can charge your customers for a base plan initially and then charge an additional fee based on their usage using metered billing.

Generally, when a business wants to automate the metered billing process, they should have a back-end server that handles the metered billing readings. Once the reading is recorded, the back-end server has to process the difference between the last recorded reading and the current closing reading. If the customer has exceeded the base limit, the back-end server makes an API request to Zoho Subscriptions to update the invoice and charge an additional fee.

Let's consider the following scenario to understand this better. Zylker Electro provides electricity services to residential areas. They have a meter installed in all the houses of the residential area to record the power consumption. Every month, a Zylker personnel visits the houses in the residential area to note down the meter reading. Then, the difference between last month's meter reading and the current month is calculated. If the customer has consumed more than 500 units of power, they will charge the customer an additional 12 cents per unit.

To automate the above process, Zylker has to build a back-end server that will:
  • store the meter readings;
  • calculate the power consumed for every month; and
  • charge the customers accordingly.
Instead of building a back-end server, you can automate the process using the Custom Functions in Zoho Subscriptions and Google Sheets. With the help of Google Sheets, you can note down all the metered readings every month. Later, you can use Google App Scripts to fetch the readings and update the pending invoice using the Custom Functions.

How can you do it?

You can use Google Sheets to note down the readings every month (similar to the image shown below).




Field
Description
Last Recorded Reading
The meter reading at the end of the previous month.
Closing Reading
The meter reading at the end of the current month.
Status
The field is used to specify whether the invoice for a customer has been updated in Zoho Subscriptions or not.
ID
Unique Ids that are used to map the customers between Google Sheets and Zoho Subscriptions.

Google allows us to access and edit the data in spreadsheet with the help of Google Scripts. Coming back to the scenario, every month a Zylker personnel will record the readings in the Google Sheet. With Zoho Subscriptions, you can configure a custom function to run for the invoices in the Pending status. You must configure the Custom Function in such a way that:
  1. it fetches the meter readings from Google Sheets using Google script;
  2. processes the data and adds an additional charge to the invoice, if needed (based on the consumption);
  3. updates the Status in Google Sheets as Updated; and
  4. updates the Last Recorded Reading with current month's closing reading.
Once the custom function executes successfully, the invoice will be updated with the additional charge. The value in the Status field of the Google sheet will also be updated.

Getting started with Google Apps Scripts:

Google Apps Scripts provides you with feature-rich APIs that allow you to build you own web applications. For our scenario, we will be using the Spreadsheet APIs to fetch and edit the spreadsheet document. We will create two scripts:
  1. The first script will be used to fetch the last recorded reading and the closing reading of a customer.
  2. The second script for changing the Status field of the customer once the invoice is updated.
To create a script in Google App Scripts:
  1. Go to and click the New Script option on the top-left corner.
  2. Copy the scripts provided above and modify it to suit your needs.
  3. Once you are done, click the Publish option on the top and select the Deploy as web app option.
  4. Provide the project name.
  5. Choose Anyone, even anonymous in the Who has access to the app dropdown.
  6. Click the Deploy button.
  7. Save the Web app URL which will be displayed on the screen for future reference.
Once the Google app scripts are successfully deployed:
  1. Create a new Custom Function in Zoho Subscriptions.
  2. Choose the Module as Invoice and Predefined event as Invoice created.
  3. Copy the Custom function from this GitHub link and modify it as per your requirements.
  4. Save the Custom Function and you are good to go.
Found this useful? Try it out for your subscription business and let us know. If you have any queries, feel free to comment below. We are here to answer them.

Cheers,
Sasidaran K,
The Zoho Subscriptions Team.

    Access your files securely from anywhere







                            Zoho Developer Community




                                                  • Desk Community Learning Series


                                                  • Digest


                                                  • Functions


                                                  • Meetups


                                                  • Kbase


                                                  • Resources


                                                  • Glossary


                                                  • Desk Marketplace


                                                  • MVP Corner


                                                  • Word of the Day


                                                  • Ask the Experts



                                                            • Sticky Posts

                                                            • Tip #4 : Refer and Earn Workflow system for your Subscription Business

                                                              Hello everyone, We've been coming up with a tip every week to address specific business scenarios which can be implemented for your business. In continuation to the previous post, this week we will be seeing about how you can implement the Refer and Earn Workflow system to acquire more customers. Why are Referrals important? Customer Acquisition is crucial for any business to sustain itself in a constantly evolving market. It involves persuading new consumers to purchase your products. Customers
                                                            • Tip #2 - Cancellation of Offline Subscriptions based on the Expected Payment Date

                                                              Hello everyone, As you all know, we are coming up with a custom function workflow every week to address specific business scenarios. In continuation of this previous blog, this week we will be seeing about Cancellation of Offline Subscriptions based on the Expected Payment Date. Business Scenario: In general, for any business, the customers make payments via online as well as offline. In case of subscription where the automatic collection of charge is enabled (aka online subscription), the customer's
                                                            • Tip #3 : Send SMS Reminders for your Subscription Business

                                                              Hello everyone, As you all know, we are coming up with a tip every week to address specific business scenarios. In continuation to the previous blog, this week we will be seeing how you can use SMS reminders for your Subscription Business. Using SMS messages for your Subscription Business: While managing your subscription business, more often than not, you need to keep your customers informed about upcoming renewals, payment reminders and cancellations. By keeping them informed in advance, you can
                                                            • Tips And Tricks - Announcement

                                                              Hello everyone, Every business is unique and each of them follows a specific workflow. While managing your customers' subscriptions with Zoho, you might have some needs unique to your business. Custom Functions helps you address such needs. This is a start to a series of posts, where we will be coming up with a custom function workflow every week that addresses specific business scenarios. Watch this space for further updates! Also, if you have any specific business scenario which needs to be addressed,
                                                            • Tip #6 : Accessing external URLs from Zoho Subscriptions

                                                              Hello everyone, We have been sharing a tip every week to address specific business scenarios which you can implement for your subscription business. Last week, we shared a tip about implementing the Approval Workflow system. This week, let's look at how you can access external URLs with the help of Custom Link. Business Scenario: Every business functions differently and has its unique requirements. At times, businesses might want to access other websites or applications by appending specific information


                                                            Manage your brands on social media



                                                                  Zoho TeamInbox Resources



                                                                      Zoho CRM Plus Resources

                                                                        Zoho Books Resources


                                                                          Zoho Subscriptions Resources

                                                                            Zoho Projects Resources


                                                                              Zoho Sprints Resources


                                                                                Qntrl Resources


                                                                                  Zoho Creator Resources



                                                                                      Zoho CRM Resources

                                                                                      • CRM Community Learning Series

                                                                                        CRM Community Learning Series


                                                                                      • Kaizen

                                                                                        Kaizen

                                                                                      • Functions

                                                                                        Functions

                                                                                      • Meetups

                                                                                        Meetups

                                                                                      • Kbase

                                                                                        Kbase

                                                                                      • Resources

                                                                                        Resources

                                                                                      • Digest

                                                                                        Digest

                                                                                      • CRM Marketplace

                                                                                        CRM Marketplace

                                                                                      • MVP Corner

                                                                                        MVP Corner







                                                                                          Design. Discuss. Deliver.

                                                                                          Create visually engaging stories with Zoho Show.

                                                                                          Get Started Now


                                                                                            Zoho Show Resources

                                                                                              Zoho Writer

                                                                                              Get Started. Write Away!

                                                                                              Writer is a powerful online word processor, designed for collaborative work.

                                                                                                Zoho CRM コンテンツ



                                                                                                  Nederlandse Hulpbronnen


                                                                                                      ご検討中の方




                                                                                                              • Recent Topics

                                                                                                              • Zoho Books Sandbox environment

                                                                                                                Hello. Is there a free sandbox environment for the developers using Zoho Books API? I am working on the Zoho Books add-on and currently not ready to buy a premium service - maybe later when my add-on will start to bring money. Right now I just need a
                                                                                                              • Super Admin Logging in as another User

                                                                                                                How can a Super Admin login as another user. For example, I have a sales rep that is having issues with their Accounts and I want to view their Zoho Account with out having to do a GTM and sharing screens. Moderation Update (8th Aug 2025): We are working
                                                                                                              • Is it possible to remove filtering options?

                                                                                                                My CRM has a lot of custom fields that should not be used in filters or views. Fields that are automated and exist only to store temporary values that get used in functions. These create a lot of noise in the list of fields to filter. Isn't there any
                                                                                                              • Print / Export full Dashboard page

                                                                                                                Hello Zoho team, It is currently only possible to print/export one component of a dashboard at a time. Requesting the option to print/export a full dashboard page with all components to a pdf or picture. Doing through the browser doesn't give good results.
                                                                                                              • Function #18: Associate invoice templates automatically based on customer language

                                                                                                                For businesses dealing with a diverse linguistic clientele, it becomes crucial to send out invoices in the customer's preferred language to ensure effective communication. This requirement can be handled in Zoho Books by creating invoice templates in
                                                                                                              • Changing field types

                                                                                                                Question im a Zoho CRM user and curious, if I change a flied type from single or multi line text to a URL field type will i lose the data in the field or will it be converted to website link automatically. Thanks
                                                                                                              • CRM x WorkDrive: We're rolling out the WorkDrive-powered file storage experience for existing users

                                                                                                                Release plan: Gradual rollout to customers without file storage add-ons, in this order: 1. Standalone CRM 2. CRM Plus and Zoho One DCs: All | Editions: All Available now for: - Standalone CRM accounts in Free and Standard editions without file storage
                                                                                                              • Quote PDF – Header image stopped rendering suddenly

                                                                                                                Hello Zoho Support Team, We are facing an issue with Quote PDF templates in Zoho Books. Previously, images added inside the Quote header HTML were rendering correctly. However, recently the header image is no longer appearing, while header text still
                                                                                                              • Changing Default PDF Name

                                                                                                                Is it possible to change the default name of a PDF? As of right now, all of my quotes are named 'QT_$QuoteNumber' (i,e: 'QT_19803471298374) - would it be possible to change this to: '$CompanyName - $AccountName - $QuoteNumber' for instance?
                                                                                                              • Tip 2: Recursive functions in Deluge: How to dynamically run a function for a specified number of times.

                                                                                                                Hi folks, As part of the Zoho Creator - Tips and Tricks series every fortnight, we are back today with a new tip on Recursive functions.  Let us first quickly understand what Recursive functions are: A function that calls itself one or more times is known as a Recursive function. That is, you can execute a function to perform a particular action a specific number of times. And, at the end of each iteration, a new output is generated. Recursive functions are commonly used by programmers as it enables
                                                                                                              • Removing "Products" as mandatory field from Sales Order creation page

                                                                                                                Hello, friends According to our workflow, we should: 1) create Sales Order (Stage "New") 2) call and discuss the Products with a customer (Stage "Communication") 3) add the Products to the Sales Order during the call However, "Products" is mandatory to
                                                                                                              • Function #48: Manage fixed installment payments using Zoho Books

                                                                                                                Hello everyone, and welcome back to our series! Businesses offer installment payment options to their customers, particularly for expensive purchases, to ease the financial burden on them. By breaking down the total cost into smaller, more manageable
                                                                                                              • Function #1: Convert an accepted Estimate to Sales Order automatically in Zoho Books

                                                                                                                As you’re aware, Zoho Books provides a default option to have the estimates automatically converted to invoices once your customer accepts them. Many of you wanted a similar option for sales orders, so here’s a workflow that converts accepted estimates
                                                                                                              • Spotlight series #6: The Show app for Android TV has a new look!

                                                                                                                Hello everyone! We are delighted to introduce our revamped and redesigned Show app for Android TV.  Smart TVs are exploding in popularity. Android TV alone has over 110 million active monthly devices. Zoho Show, as part of a constant effort to improve
                                                                                                              • Employee Appraisal Applicability - Why is Date of Joining Hard-Coded?

                                                                                                                In the new (to me, at least) Performance Appraisal Cycle wizard, it's possible to set criteria to determine for whom the appraisal process should apply. This makes sense on its face. However, one MUST use the Date of Joining criterion as a filter. Why
                                                                                                              • WorkDrive for Excel Add on

                                                                                                                Dear Sir/Madam Have installed Workdrive for Microsoft add on But unable to view the same added in Excel
                                                                                                              • Zoho Books integration sync from Zoho CRM does not work

                                                                                                                Hi Zoho Community & Zoho Support We just tried to get a sync some products into Zoho Books from CRM using the native sync and we're getting an error: "It looks like some mandatory fields you're trying to map are empty. Please provide valid field names
                                                                                                              • Appraisals - Order of Previous Reviews Should Be Newest to Oldest

                                                                                                                The new Zoho People layout generally does a decent job at providing the necessary information for performing appraisals of employee performance. One example of this is the Previous Reviews section: This information is helpful when conducting a review.
                                                                                                              • Referencing a cell from another sheet

                                                                                                                My workbook has multiple sheets. Each sheet has some calcluated totals in certain cells. The front master sheet has a list of everything that is detailed on the other sheets, with the totals. These could change at any time, so the totals need to be references to the other cell's value, not a fixed number. So on the master sheet, I put in =, then go the other sheet and choose the cell and hit Enter. In regular Excel, this works. But in the Zoho sheet, it doesn't work. I have to edit the result by
                                                                                                              • auto close automated alert tickets which are similar

                                                                                                                Hello ZOHO Community, we are using ZOHO Desk to process automated monitoring alerts. Scenario: Our monitoring system creates a ticket when a threshold is exceeded, e.g. Subject: Computer 1 – CPU usage 100% – Error A few minutes later, once the issue resolves
                                                                                                              • Paging through API results. a major gap in your documentation.

                                                                                                                There is no way for me. to get all of my data through a single API call. Typically REST APis have mechanisms for paging through API results. But the documentation for the API I am using: https://desk.zoho.com/DeskAPIDocument#Introduction Has no mention
                                                                                                              • Recurring invoices were generated with old template...

                                                                                                                I have recurring invoices setup. Ones generated on 10.20.2025 used the modified template I had used. But for some reason, on the ones created on 11/20/2025, it seems the invoices created reverted to the previous version of the invoice template. Notably,
                                                                                                              • RouteIQ for Zoho FSM

                                                                                                                Beste, Zou wel top zijn dat we een RouteIQ hebben voor FSM aangezien we constant moeten zien wat de beste route is voor onze monteurs. Nu moeten we een speciale aparte programma hebben om de beste route te berrekenen voor onze monteurs aangezien de planning
                                                                                                              • How do people handle using Outlook and Zoho Project calendar at the same time?

                                                                                                                We have an ongoing problem in our organisation where we use Zoho Projects to plan all of our projects tasks and that also allows us to look forward using the workload report to see which of our consultants are overstretched etc and which are available.
                                                                                                              • Knowledgebase SEO

                                                                                                                We have a custom-domain mapped help center that is not restricted via login. I have some questions: a) will a robots.txt file still allow us to control indexing? b) do we have the ability to edit the sitemap? c) do category URLs get indexed by search
                                                                                                              • Please, make writer into a content creation tool

                                                                                                                I'm tired of relying on Google Docs. I'm actually considering moving to ClickUp, but if Writer were a good content creation tool instead of just a word processor, I would finally be able to move all my development within the Zoho ecosystem, rather than
                                                                                                              • How do I associate pricebooks to a customer?

                                                                                                                I setup a few pricebooks, that worked fine. But now the only thing I can do with it, when I enter a quote or sales order, I can select which pricebook to use, but I have to do this product by product every time I add one. Is there a way to connect a pricebook
                                                                                                              • Write-Off multiple invoices and tax calculation

                                                                                                                Good evening, I have many invoices which are long overdue and I do not expect them to be paid. I believe I should write them off. I did some tests and I have some questions:  - I cannot find a way to write off several invoices together. How can I do that,
                                                                                                              • Leave Report Emailed Weekly

                                                                                                                I am wondering if someone knows how to have a report generated either weekly or monthly or both for department heads and ownership of upcoming employee leave. For instance, it would be nice to get an emailed report on Friday for the upcoming week of who
                                                                                                              • Zoho desk desktop application

                                                                                                                does zoho desk has a destop applicaion?
                                                                                                              • Tip #54- Exploring the Files Icon in Zoho Assist- 'Insider Insights'

                                                                                                                As we’re already in mid-December, it’s a good time to take a closer look at one of the most useful options in the Zoho Assist remote support dashboard—the Files icon. To get started, log in to Zoho Assist using your credentials. Once you’re in, navigate
                                                                                                              • Tip#47: Estimation planner

                                                                                                                Sprint planning becomes easier, smoother, more collaborative and more accurate with the Estimation Planner extension. Most work items involve multiple users, and each user's role and effort vary. To provide an unbiased and fair estimation point to the
                                                                                                              • Painfully Slow Zoho mail

                                                                                                                Since yesterday Zoho Mail seems to have starting functioning very slowly and having a few bugs. It's slow to open mails, slow to send, slow to change between email accounts. Sometimes clicking on a particular folder (eg Sent folder) stops working and
                                                                                                              • Upcoming update to Google Drive integration in Zoho Creator

                                                                                                                Hello everyone, We're writing to inform you about an upcoming update to how Zoho Creator integrates with Google Drive. In Zoho Creator, during actions like importing files to create an app or attaching files to fields, you can choose files directly from
                                                                                                              • Time Tracking on Iphone doesn't stop

                                                                                                                When I start a time tracking session the timer starts as expected. However when I hit stop, the timer remains on that project. The only buttons available are discard and start. Start runs the timer more and discard says it will throw away the data from
                                                                                                              • Zoho Sign - Zoho CRM extension upgrade

                                                                                                                Hi everyone, We've updated Zoho Sign extension for Zoho CRM with significant internal changes. Impact on existing Zoho Sign extension users Users using the extension without customization If you are using the integration without implementing Zoho Sign's
                                                                                                              • Zoho Books blocks invoicing without VeriFactu even though it is not mandatory until 2027

                                                                                                                I would like to highlight a very serious issue in Zoho Books for Spain. 1. The Spanish government has postponed the mandatory start of VeriFactu to January 1st, 2027. This means that during all of 2026 businesses are NOT required to transmit invoices
                                                                                                              • Group by Owner/ Owner Kanban /Group by Custom Field

                                                                                                                Hi, We are missing the option of viewing Tasks grouped by their owner, as it is an essential function for us to manage our employees' working tasks. We find it hard to inspect what are the tasks that our employees are working on.  We are seeking an option
                                                                                                              • Flow using way too many tasks

                                                                                                                I built a flow that is using way too many tasks for what it is doing. I reached out to support a week ago but never heard back so hoping the community can help. Does a filter count as a task? I am seeing tons of records filtered with < 1 Sec Time Taken
                                                                                                              • Regarding the integration of Apollo.io with Zoho crm.

                                                                                                                I have been seeing for the last 3 months that your Apollo.io beta version is available in Zoho Flow, and this application has not gone live yet. We requested this 2 months ago, but you guys said that 'we are working on it,' and when we search on Google
                                                                                                              • Next Page