Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Annual subscription cost
$2,100
Monthly total
$175.00
Wasted per year
$630
5-yr value if invested
$3,623
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter number of subscriptions.
- 2Enter average monthly price ($).
- 3Enter share rarely used (%).
- 4Enter investment return if saved (%).
- 5Read your annual subscription cost on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Small monthly charges hide a big annual number. Total the stack, see the yearly cost, and find out what cancelling the unused share is worth over five years.
Worked example
Using the values the calculator loads with:
Inputs
- Number of subscriptions: 14
- Average monthly price: 12.5 $
- Share rarely used: 30 %
- Investment return if saved: 7 %
Results
- Annual subscription cost: $2,100
- Monthly total: $175.00
- Wasted per year: $630
- 5-yr value if invested: $3,623
What each field means
Inputs
- Number of subscriptions
- The number of subscriptions used in the calculation. Starts at 14 so you have a working example on load.
- Average monthly price ($)
- The average monthly price used in the calculation, measured in $. Starts at 12.5 $ so you have a working example on load.
- Share rarely used (%)
- The share rarely used used in the calculation, measured in %. Starts at 30 % so you have a working example on load. Accepted range: 0–100 %.
- Investment return if saved (%)
- The investment return if saved used in the calculation, measured in %. Starts at 7 % so you have a working example on load.
Results
- Annual subscription cost
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Monthly total
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Wasted per year
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- 5-yr value if invested
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the subscription audit calculator work?
Small monthly charges hide a big annual number. Total the stack, see the yearly cost, and find out what cancelling the unused share is worth over five years. The underlying maths is: Annual = count × average price × 12. Waste = annual × unused share.
What do I need to enter?
4 values: number of subscriptions, average monthly price, share rarely used, and investment return if saved. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the annual subscription cost result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Subscription Audit Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/subscription-audit
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/subscription-audit" target="_blank" rel="noopener">Subscription Audit Calculator — RevenueLab</a> (2026).</p>
Source: [Subscription Audit Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/subscription-audit) (2026).