Is an AI subscription worth it for your work?
Start with one real task and the price you actually pay. Include checking the output. Find out what your estimates imply before buying, renewing or cancelling.
A useful subscription should earn its place through work you actually do. Saving time, improving quality and meeting a requirement are different benefits. This calculator models the time part using your inputs; it cannot verify the quality of a product or predict extra income.
Time value is not cash saved. Your assumptions do not establish an actual refund, lower bill or extra revenue. Other tool costs, migration risks, quality differences and demand for your work are outside this model.
How to check whether a paid AI tool earns its cost
- Pick one recurring job. Use drafting a client email, preparing meeting notes or checking a document rather than a vague “productivity” estimate.
- Try both workflows on comparable tasks. Measure the alternative and the paid tool, including quality review. A fast first draft may still take longer to finish.
- Record a realistic monthly task count. Occasional impressive demos are not evidence of recurring use.
- Keep money and time separate. Saved time can be useful even when it produces no extra income. A subscription charge is an actual bill; the hourly value here is an assumption.
- Check other reasons to keep it. Accessibility, a specialist feature, a team dependency or a client requirement may matter even when this task alone does not cover the cost.
The formulas, with a clearly hypothetical example
Monthly time difference = tasks per month × (minutes without − minutes with) ÷ 60. First-month time difference subtracts your one-off setup hours. Where you assign a positive hourly value, modeled balance = time difference × hourly value − monthly cost.
Illustrative example: a 20 USD monthly charge, 12 tasks per month, 30 minutes without the tool and 15 minutes with it gives 3 hours of recurring time difference. At an assumed 20 USD/hour, that is 60 USD of modeled time value and a 40 USD modeled recurring balance. One hour of first-month setup reduces the first-month balance to 20 USD. None of these numbers is a vendor price, a measured StackDiet saving or guaranteed income.
When this calculation is not enough
If the output is unreliable, confidentiality requirements are not met, or a workflow depends on a paid-only feature, a positive modeled balance is not sufficient. If you already pay for another tool that performs the job, compare that existing alternative before adding a subscription. An annual monthly equivalent also does not imply that cancelling today returns the annual charge.
Common questions
Can I use this before buying an AI subscription?
Yes, if you have a real quoted cost and tested task timings. Trial performance and your assumptions are still a scenario, not a promise about future use. Verify the plan you would actually buy.
What if I do not know the value of my time?
Leave the hourly value blank. The calculator still shows the time difference and the charge; monetary value remains unknown.
Does saving two hours mean I saved money?
It can free time for other work or rest. It only becomes an actual financial change when a cost is genuinely avoided or paid work generates additional income. This calculator does not verify either.
Will StackDiet tell me which subscription to cancel?
It provides decision support. Check actual use, unique capabilities, renewal terms and what depends on the tool before you make that decision.
Method: transparent scenario arithmetic and editorial workflow guidance. No vendor pricing is supplied or assumed. Published 4 October 2026.