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Subscription Cost Calculator
Find out what a recurring subscription really costs. Enter the price and billing cycle, choose a horizon, then press Calculate to see the daily, monthly and lifetime cost and the growth you give up.
Written by TopicDrill Editorial Team·Updated June 2026
Cumulative spend vs invested
If invested Spent
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How the subscription cost calculator works
The tool first normalizes your price into a single yearly figure by multiplying it by how often you are billed and by the number of seats. From that it derives the daily, weekly and monthly cost so any plan can be compared on equal terms.
It then projects forward year by year, raising the price by your expected increase and adding each monthly payment to a separate investment pot that grows at the return you pick. The chart contrasts what you spend with what that money could have become instead.
A quick example
A $15.99 monthly app comes to about $192 a year. Hold it for ten years with a 5 percent annual price rise and you spend well over $2,000. Invested at 7 percent instead, those same payments could grow to noticeably more, which is the real price of keeping a service you rarely use.
Things to keep in mind
The projection assumes you keep paying for the full horizon, so cancelling early changes the picture entirely. For practical tips on auditing recurring charges, the FTC consumer site is a neutral starting point. To turn cancelled subscriptions into long-term growth, try our future value calculator.
Frequently asked questions
Why does a small monthly fee add up to so much?
A subscription charges you on a fixed schedule for as long as you keep it, so the cost is the price times the number of billing periods. A fee that looks trivial each month becomes hundreds per year and thousands over a decade, especially once annual price rises are included.
What is the opportunity cost shown here?
It is what the same money could grow to if you invested each payment instead of spending it. The calculator adds every payment to an investment pot earning the return you choose, so you can compare keeping the subscription against the wealth that money might have built.
How does the annual price increase work?
Many services raise prices over time. The calculator multiplies the yearly cost by your expected increase at the start of each year, so the projection reflects a subscription that gets more expensive rather than one frozen at today's price.
How do I convert a yearly plan to a monthly cost?
Divide the yearly price by twelve. The calculator does this automatically and also shows the weekly and daily equivalents, which makes it easy to compare a yearly plan against a monthly one on the same footing.
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