Free tool
Price Increase Calculator
A rise from $49 to $59 is +20.4% and pays off until 16.9% of customers leave. Test your own.
- Price change
- +$10 a monthPer customer.
- Percent change
- +20.4%Divided by the old price, not the new one.
- MRR today
- $19,600
- Customers staying
- 38020 of 400 leave.
- MRR after the change
- $22,420
- Net change in MRR
- +$2,820 a month+14.4% of today's MRR.
- Change in ARR
- +$33,840Twelve months of the monthly change.
- Break-even loss
- 16.9%Up to 67 of 400 subscribers can leave before MRR falls below today's.
- Rise 20%, then cut 20%
- $47.04From $49: $58.80 after the rise, $47.04 after the cut, which is 4.0% below where you started.
- MRR at the new price
- MRR today
- MRR (USD)
How this was worked out
- The price moves from $49 to $59, a change of +$10. That is +20.4% of the old price ($10 divided by $49).
- Today 400 subscribers at $49 make $19,600 a month.
- If 5.0% leave, 380 subscribers stay (400 times 95.0%, rounded to a whole customer).
- 380 subscribers at $59 make $22,420 a month, a net change of +$2,820 (+14.4%), or +$33,840 over a year.
- Break-even: the extra revenue per customer covers the loss until 16.9% of customers leave (1 minus $49 divided by $59), which is 67 of your 400.
- Percent changes do not undo each other: $49 raised 20% is $58.80, and cutting that by 20% leaves $47.04, 4.0% below $49.
How the sum works
Take the new price minus the old price and divide by the old price: that is the percent change. Multiply your customers by the old price for MRR today. Multiply the customers who stay by the new price for MRR after, and subtract to get the net change. Break-even is the share of customers you can lose before that net change reaches zero, and it equals 1 less the ratio of the old price to the new price.
In symbols: change = (p1 - p0) / p0. MRR0 = n x p0. n1 = round(n x (1 - L)). MRR1 = n1 x p1. Net = MRR1 - MRR0. Break-even loss = 1 - p0 / p1. For a cut, break-even gain = p0 / p1 - 1. Here p0 is the old price, p1 the new price, n the customers today and L the share who leave.
Worked examples
Each example is run through the same function as the calculator above. The customer counts and shares are example numbers, not benchmarks.
A rise from $49 to $59 on 400 subscribers
This is the calculator's starting example: 380 of 400 subscribers stay when 5% leave.
| Result | Value |
|---|---|
| Price change | +$10 a month |
| Percent change | +20.4% |
| MRR today | $19,600 |
| Customers staying | 380 |
| MRR after the change | $22,420 |
| Net change in MRR | +$2,820 a month |
| Change in ARR | +$33,840 |
| Break-even loss | 16.9% |
A low-price plan going from $19 to $24 on 1,200 subscribers
A small plan can take a large percent rise, so the break-even share is worth reading before you pick a number. Here 8% of customers leave.
| Result | Value |
|---|---|
| Price change | +$5 a month |
| Percent change | +26.3% |
| MRR today | $22,800 |
| Customers staying | 1,104 |
| MRR after the change | $26,496 |
| Net change in MRR | +$3,696 a month |
| Break-even loss | 20.8% |
A cut from $99 to $79 on 150 subscribers
A cut reverses the question. Instead of how many customers you can lose, it asks how many more you need.
| Result | Value |
|---|---|
| Price change | -$20 a month |
| Percent change | -20.2% |
| MRR today | $14,850 |
| MRR after the change | $11,850 |
| Net change in MRR | -$3,000 a month |
| Break-even gain | 25.3% |
MRR after a rise, by how many leave
For 400 subscribers at $49, this table shows MRR after the change for each rise and each share who leave. MRR today is $19,600.
| Rise | 0% leave | 5% leave | 10% leave | 20% leave |
|---|---|---|---|---|
| 10% | $21,560 | $20,482 | $19,404 | $17,248 |
| 20% | $23,520 | $22,344 | $21,168 | $18,816 |
| 30% | $25,480 | $24,206 | $22,932 | $20,384 |
How much room each rise gives you
The break-even loss depends only on the size of the rise, not on the price or the customer count. The last column applies it to the starting customer count.
| Rise | Break-even loss | Customers you can lose out of 400 |
|---|---|---|
| 5% | 4.8% | 19 |
| 10% | 9.1% | 36 |
| 15% | 13.0% | 52 |
| 20% | 16.7% | 66 |
| 25% | 20.0% | 80 |
| 30% | 23.1% | 92 |
| 50% | 33.3% | 133 |
| 100% | 50.0% | 200 |
Edge cases
- New price equal to the old price: the result reads "No change" and MRR stays where it is.
- New price below the old price: the break-even becomes the customer gain you need, labeled as such.
- Share who leave at 0%: the net change is the whole extra revenue, which is the best case and not a forecast.
- Customers must be a whole number of at least 1. A price at or below zero, or a cut of 100% or more, shows an explanation instead of a result.
- The percent mode applies the percent to the old price and rounds to the cent: a 20% rise on $49 is $58.80.
Changing a price in Stripe
- The amount of an existing price cannot be changed through the API. Make a new price at the new amount, move subscriptions onto it, then mark the old price inactive.
- Archiving a price stops it being added to new invoices or subscriptions. Subscriptions that already use it stay active until they are cancelled.
- A price you have used cannot be deleted, only archived.
Questions
How many customers can I lose before a price increase stops paying off?
The break-even share is the old price over the new price, taken away from 1. Moving from $49 to $59 gives 16.9%, which is 67 of 400 subscribers. Past that point the extra revenue from those who stay no longer covers the revenue from those who leave.
Why is the percent change not the same as the break-even share?
A percent change divides the difference by the old price: +$10 a month divided by $49 is +20.4%. The 16.9% figure is something else, the share of customers you can lose before revenue falls, and it divides by the new price. The calculator shows both and labels each.
Does raising a price by 20% and cutting it by 20% bring me back to where I started?
No. Starting at $49, a 20% rise gives $58.80, and a 20% cut from there gives $47.04, which is 4.0% below $49. The second change applies to a larger number, so equal percentages in opposite directions never cancel.
What happens to revenue if I cut my price instead?
A cut has to be paid for with new customers. Taking a plan from $99 to $79 with 150 subscribers needs 38 more customers just to match today's MRR, a gain of 25.3%. The calculator switches to this view whenever the new price is below the old one.
Does the share who leave apply to every customer equally?
The calculator treats it as one share of the whole base, which is how most plans are first sized. In practice the people most sensitive to price leave first, so check the result at a higher share too. With a 20% rise, MRR after the change is $22,344 when 5% leave and $21,168 when 10% leave.
How do I estimate the share who will leave?
Start from your own history: how many customers cancelled in the weeks after your last price change or in a normal month. Then test a range. A small shop raising its plan from $19 to $24 across 1,200 subscribers has a break-even loss of 20.8%, so with 8% leaving the net change in MRR is +$3,696 a month.
Can I edit the price of an existing Stripe subscription plan?
Stripe does not let you change the amount of an existing price through the API. Its documentation advises making a fresh price at the new amount, moving subscribers onto it and marking the old price inactive. Archiving a price keeps subscriptions that use it active until they are cancelled. This was read on 19 Oct 2026 from Stripe's price documentation.
Related tools
A price change moves your recurring revenue, so check the result in the MRR calculator and watch the churn rate in the weeks after. The customer lifetime value calculator shows what a customer who stays is worth over time, and the gross margin calculator shows whether the new price covers your costs. Browse every metric in the SaaS metrics glossary.
Sources
- Stripe: create and manage products and prices, read 19 Oct 2026.