For now, I'm treating Subscription sales on a year-by-year basis. So I look at the monthly fee estimate for the service and I multiply it by the months remaining in the current Fiscal Year.  1500/month with a March closing date means April+May+June = 4500 sale.  But I know that that client is 90% likely to remain a client for at least 18 more months.  So, I'm tempted to create a NEW opportunity for the client that closes on day 1 of the new fiscal year.  That one would be worth 1500*12= 18000 (I haven't implemented a discount of that revenue to 90%, but I might).   

But how do others treat this kind of sale?  I could also imagine adding additional fields like Year 1 Revenue, Year 2 Revenue, Year 3 revenue, and Total Lifetime Contract Value Estimate (which I'd arrive at by looking at historical data for client types and estimating how long they'll stay on).  The problem is that once the closing date is in a prior year, it would be 'invisible' to current year reports.  

Alternatively, is there a way to, essentially, automatically generate a new sale each month for these types of subscription clients?  

I'm just looking to hear how others approach this kind of revenue in both Zoho CRM and in Zoho Reports.  

Thanks!  

Andrew