"Sir, I'll process the payment by evening, please don't apply any late payment charges", the customer said while arranging papers on his desk.
Sanjay stood there with a tired smile. He had already visited twice that week. Payment collection was one thing. Explaining and justifying late fees was a whole different battle. After he left the office, he stopped at a small tea stall, opened his laptop, and stared at the spreadsheet he maintained every month, listing customer names, due dates, follow-up dates, and late fees applied.
The frustrating part was that the late fee column was always empty. Not because customers were paying on time, but Sanjay didn't want to go through another awkward conversation about why the late fee existed. He was tired of sounding like he was punishing customers for paying late, when in reality, late fees existed to protect cash flow, not to harm relationships.
He sipped his tea and thought, "If I can automate invoices and reminders... why can't the late fee be automated too?"
That moment changed everything.
Automating Late Fee
At some point, for some businesses, applying a late fee may seem less empathetic. If you prioritise your relationship over revenue, it might feel unethical, but when you consider the lag that a payment delay creates for your business, it will feel genuine.
When late fees are automated, there is no debate and no room for negotiation. If a payment is delayed beyond the due date, the system automatically applies the late fee based on the rule you set. Late fees shift from being a personal enforcement to a standard business policy.
Instead of Sanjay saying, "I have added a late fee," the system silently states, "According to your billing terms, a late fee has been applied."
Ways to Automate Late Fee
Zoho Billing supports late fee automation in two ways, based on the plan you are subscribed to.
Method 1: Using Custom Function Workflow
You configure an automation in Zoho Billing that runs on a certain number of days after the invoice due date. When it triggers, it executes a custom function that posts a late fee charge to the customer's subscription. Everything happens behind the scenes, and no manual action is required.
Here is the deluge script used within the workflow.
lateFeeAccountID = ""; // -- Paste your latefee Ledger Account ID in the below variable.
lateFeeAmount = 10; // -- Change the late fee amount and invoice description as per your needs.
invReason = "Late Payment Fee";
invDescription = "Charges for late payment for the invoice " + invoice.get("number");
organizationID = organization.get("organization_id");
subscriptionID = invoice.get("subscriptions").get(0).get("subscription_id");
domain = "https://www.zohoapis.com/billing/v1";
payloadMap = Map();
payloadMap.put("account_id", lateFeeAccountID);
payloadMap.put("amount",lateFeeAmount);
payloadMap.put("name",invReason);
payloadMap.put("description",invDescription);
url = domain + "/subscriptions/" + subscriptionID + "/charge?organization_id=" + organizationID;
request = "Charging Late Fee for " + invoice.get("number");
response = invokeurl
[
url :url
type :POST
parameters:payloadMap.toString()
connection:"YOUR_CONNECTION_NAME"
];
// -- If the custom function fails to execute, an email will be sent to admin's email address.
if(response.get("code") != 0)
{
errorMessage = response.get("message");
sendmail
[
from :zoho.adminuserid
to :zoho.adminuserid
subject :"Error occurred in Custom Function while " + request
message :"<b>Affected url :</b><br>" + url + "<br><b>Error Message</b><br>" + errorMessage
]
}
Once configured, businesses no longer need to check overdue invoices manually. Zoho Billing handles it by itself.
Method 2: In-app Late Fee Configuration
Zoho Billing also includes a built-in Late Fee configuration for specific pricing plans. Instead of scripts or workflow, you can define your rules.
You can choose whether the late fee is a fixed amount or a percentage-based, decide how many days after the due date the late fee should be applied, and select whether late fee invoices should be automatically created as draft or sent to the customer. The system acts accordingly without any intervention.
What Does a Late Fee Do to Business
Late fee imposition brings more logic to the payment collection. It streamlines the payment collection. A Few months down the line, customers start to pay before the due date. You notice fewer overdue invoices, fewer follow-ups, and zero awkward conversations. The late fee no longer feels like a punishment. It becomes a predictable rule of business.
Whether through custom function automation or the built-in late fee settings, Zoho Billing transforms late fees into a standardised, system-driven action. This changes the payment collection pain point into a predictable revenue stream.

Up Next: Tackling Payment Failures
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