Fifteen dollars a month. You tap subscribe, your card remembers the number once, and it never shows it to you again in the same bold type it used the first time. Your brain does the quick math — fifteen times twelve, a hundred eighty a year, tolerable — and closes the question. What comes next is the number the app will never calculate for you: what happens to those fifteen dollars stretched not over one year but five, once you account for the fact that the price doesn't sit still, and the fact that the money wasn't doing anything for you while it sat in someone else's pocket. The gap between the figure in your head and the figure that actually leaves your life is the real cost of a subscription. Let's work it out honestly, step by step, with one concrete example you can apply straight to your own list.
The price tag shows the wrong number
A subscription's sticker price is one month's cost multiplied by your willingness not to think further. The company knows perfectly well that a person making the decision looks at "$15/mo," mentally multiplies by twelve, rarely by five years, and almost never asks the two questions that actually determine the final total: will the price stay the same for five straight years? And what would that money have become if it had never left your pocket at all?
Neither is rhetorical. Both are concrete arithmetic you can do on a napkin in five minutes. Two multipliers that turn a harmless "$180 a year" into a figure worth seeing in full before you hit confirm.
The first multiplier: the price doesn't sit still
Subscription services almost never hold a price flat for five years running — that would work against the entire business model, which is built on growing revenue from an already-attached customer. Over the last several years, most major streaming and digital services have raised prices more than once — you can verify this in your own payment history if you check. The typical step, by various estimates, runs somewhere between five and ten percent at a time, roughly once every year or so.
Take our example — fifteen dollars a month — and assume a moderate five percent annual increase, close to what many services have actually done over the past several years. Here's what that looks like year by year:
Year 1: $15.00 × 12 = $180
Year 2: $15.75 × 12 = $189
Year 3: $16.54 × 12 ≈ $198
Year 4: $17.36 × 12 ≈ $208
Year 5: $18.23 × 12 ≈ $219
Five-year total: roughly $995. Not the $900 your quick "$15 × 12 × 5" estimate suggests, but nearly a hundred dollars more — simply because the price crept upward behind your back, and you almost certainly never opened the email about it.
The second multiplier: money that never worked
Here's the part the service will definitely never calculate for you. The fifteen dollars that left your card this month wasn't just fifteen dollars spent. It was also fifteen dollars that never got invested and never grew. Any money you don't spend but instead put somewhere productive — even a plain, broad index fund with a historical average return around seven percent a year — carries a cost for the choice not to: what it could have become instead.
Run the same example. If you'd set aside fifteen dollars a month for five years — the same sixty payments that went to the subscription — and that money had grown at a rough seven percent annually, you'd end up with roughly $1,075. About $900 of that is your own contributions; the remaining $175 or so is growth that simply never happened, because the money went the other direction.
Our record: this is exactly the motion the Scales of Maat perform, just at the scale of one line in a bank statement — you place the number you can see with your eyes on one pan, and the number that actually happened to your resources on the other. The gap between them isn't an abstraction or a verdict. It's honest sight. You don't owe anyone a cancellation. But you do owe yourself the weighing before the decision — otherwise the decision isn't made by your own heart (Ib), it's made by someone else's standing order.
A napkin calculator: three steps for any subscription
The method transfers to any subscription in your life in under a minute, no spreadsheet required.
Step one — the baseline number. Monthly price times 12, times however many years you're thinking about; for a real horizon, use 5, since that's the stretch people almost never look ahead to. This is the number the service wants living in your head.
Step two — the price-drift adjustment. If the service has any history of price increases — and most large ones do — add roughly 8 to 10 percent to the baseline as a rough but honest estimate of the inevitable drift over five years. You don't need the exact figure, just the right order of magnitude.
Step three — the cost of forgoing it. Take that same baseline and estimate what it would have become at a rough market-average return of around 6 to 7 percent annually over the same span — the uplift usually lands somewhere around 15 to 20 percent on top. This isn't something you "lost" in a literal sense; it's what you traded away for the convenience of not thinking about the alternative.
Add it all together, and the number that started as "$180 a year, tolerable" turns into the real five-year price of the question — one worth seeing whole, at least once, before the subscription renews for the fifty-ninth time without a single decision from you.
What to do with the number once you have it
The point of this exercise isn't to cancel everything and live in digital austerity. Some subscriptions honestly earn their five years — you use them weekly, they genuinely save time, or they deliver exactly what you signed up for. The math doesn't pass judgment on the subscription. It just strips it of its one weapon: your underestimate.
Once you're looking at the real five-year figure instead of the monthly façade, the decision stops being a default auto-renewal and becomes the deliberate choice it should have been from the start. Sometimes the honest number confirms it: yes, this one earns its place, keep it with a clear conscience. Sometimes it pushes you toward cancelling. Either way, what wins isn't the service — it's your ability to see instead of guess.
Your action for today
Pick one subscription — any one, but ideally one whose price you haven't thought about in a while. Multiply the monthly price by 12, then by 5 — that's your baseline. Add 10 percent for price drift over five years. Add another 15 to 20 percent as the cost of not investing that same money. Add it all up and look at the total as one whole number, not spread across sixty invisible little charges.
If that number doesn't bother you, good — the subscription has honestly earned its place, and now you know it instead of just assuming it. If it does bother you, you've got ninety seconds to change that, and the rest of five years to be glad you did it today instead of another year into fifteen dollars you never quite counted.