What Is It Really Costing Me?

Small expenses add up. See the real number.

100% private — every calculation happens in your browser. Nothing is uploaded to a server.
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Why small expenses deserve a real number

It's easy to underestimate a recurring expense because you only ever see one instance of it at a time — one coffee, one subscription charge, one ride. What Is It Really Costing Me? multiplies that single instance out across a day, a month, a year and a decade, so you're comparing the real, cumulative number instead of the misleadingly small one.

Enter an amount and how often you pay it — daily, weekly, monthly, yearly, or a custom interval — and the calculator converts it into every other timeframe using consistent, calendar-accurate averages (30.44 days per month, 365.24 days per year), so the numbers stay comparable across different expenses.

You can stack multiple expenses — a coffee habit, a couple of streaming subscriptions, a gym membership you rarely use — into a single combined total, which is often where the real surprise shows up. Individually, none of them look dramatic. Added together over five or ten years, they usually do.

This isn't about guilt-tripping any particular purchase. Small recurring expenses are often worth every cent. The point is simply to replace a vague sense of “it's not much” with an actual number, so the decision to keep paying for it — or not — is an informed one.

Frequently asked questions

Why does a small daily expense add up to so much?

Compounding frequency, not compounding interest: a $3 coffee doesn't feel like much once, but multiplied by roughly 365 days a year it becomes a real four-figure number — and multiplied by 10 years, five figures. The calculator just does that multiplication for you.

Can I add more than one expense?

Yes. Use “Add another expense” to combine several recurring costs — coffee, a streaming subscription, a gym membership — into one combined real-cost total.

What does “custom” frequency mean?

Use it for expenses that don't fit daily, weekly, monthly or yearly — for example something you pay every 45 or 90 days. Enter the interval and we'll convert it to the same monthly and yearly figures.

Does this include interest or investment growth?

No — this tool simply adds up what you'd spend over time at the same rate, with no compounding or investment assumptions. For what that money could become if invested instead, see the opportunity-cost section in Can I Afford It?.

Is a subscription I forgot about counted differently?

No — the math is the same whether the expense is intentional or one you forgot to cancel. That's often exactly why this tool is useful: it surfaces the real annual cost of things that felt too small to notice.

Is my data saved anywhere?

No. The calculation happens entirely in your browser. Nothing you enter is sent to a server or stored after you leave the page.

What's next?