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The Real Cost Of An AI Subscription, Once You Count The Time Saved
By Nigel Guy · 2 min read
People judge an AI subscription against the sticker price alone — "is £20 a
month worth it?" — as if that number means anything on its own. It doesn't.
A subscription that costs £20 and saves you four hours a month is one of the
best-value purchases you make all year. The same £20 spent on a tool you
open twice and abandon is pure waste. The price is the same; the value isn't.
The rule: judge a subscription by what an hour of your time is actually
worth, not by whether the monthly fee feels big or small in isolation.
The mechanism
- Estimate what you'd pay someone to do the task you're using it for.
Not your salary divided by hours — what you'd actually pay a freelancer
or assistant for that specific task.
- Track real usage for two weeks, roughly — how many times you actually
opened it and it did something useful. Most people wildly over- or
under-estimate this without checking.
- Multiply time saved by your real hourly value, once a month. If the
number comfortably clears the subscription cost, it's earning its keep.
If it doesn't, that's useful information, not a failure to admit.
- Re-run this check quarterly, not once. Usage patterns drift — a tool
that earned its cost in month one can quietly become a £20 line item
you're not really using by month four.
What to skip
Skip comparing the price to "what it would cost to hire someone full-time" —
that's not the comparison anyone's actually making. And skip keeping a
subscription out of habit or sunk cost once the honest audit says you're not
using it; cancelling a tool you're not using isn't a loss, it's correcting an
earlier estimate.
Guardrails
- This math works for individual and business use alike, but a business
should also weigh subscriptions against the cost of the alternative going
undone — sometimes the honest comparison isn't "pay for this or do it
yourself," it's "pay for this or it simply doesn't happen."
- Time "saved" that gets immediately filled with more low-value work isn't
actually saved — the value only shows up if the freed time goes somewhere
that matters.
- Free tiers and trials are worth genuinely testing before you commit to a
paid tier — the honest audit above works just as well during a trial
period as after you've already paid.
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