Monthly vs Annual Subscription Calculator
Compare plan spending over a horizon with full annual renewals and no proration.
Your result
FINANCIALEnter your values and select calculate.
On this page How it works & practical examples
How to use the Monthly vs Annual Subscription Calculator
Enter prices for plans with comparable features and your actual access horizon. An annual plan is modeled as a complete purchase for each started 12-month block, so short use can change which option costs less.
The calculation
Worked example
For 18 months at $15/month versus $120/year, monthly spending is $270 and two full annual purchases total $240.
Assumptions and limits
No refund, proration, promotional renewal price or time-value discount is assumed. Feature differences and cancellation policies need to be compared separately.
Common questions
Why are two annual fees counted at month 13?
The model requires a second complete annual purchase to maintain access past the first 12 months.
Is the cheapest plan always the best option?
No. Flexibility, features and cancellation rules are outside the arithmetic.