Price Increase Calculator
Enter today's price and the new one, how many customers pay it, and how many you expect to leave. You get the percentage change, your MRR after the change, and how many can leave before it costs you.
What a customer pays each month now.
Your estimate.
- MRR at $59.00
- MRR today, $19,600
- Your estimate: 5.0% leave
- Lines cross at 16.9% leaving
- ($59.00 − $49.00) ÷ $49.00 × 100= +20.4% price change
- 400 × $49.00= $19,600 MRR today
- 380 × $59.00= $22,420 MRR after
- 1 − $49.00 ÷ $59.00= 16.9% can leave
A price increase percentage is the change divided by the old price.
price increase % = (new price − old price) ÷ old price × 100
new price = old price × (1 + increase %)
The calculator starts at $49 a month going to $59. The change is $10, and $10 divided by $49 is 20.4%. Divide by the old price, not the new one: $10 divided by $59 would give 16.9%, which is the share of the new price the rise makes up.
$49 to $59 as a percentage
A 20% rise followed by a 20% cut leaves the price below where it started.
Each percentage is taken from a different starting price. $49 raised 20% is $58.80. Cutting $58.80 by 20% takes off $11.76, more than the $9.80 the rise added, and leaves $47.04. The same rule makes a discount and a price rise of the same size not cancel out.
MRR after a price rise is the customers who stay times the new price.
MRR after = customers × (1 − share who leave) × new price
With 400 customers at $49, MRR today is $19,600. If 5% leave over the change, 380 stay and pay $59, which is $22,420. That is $2,820 more a month and $33,840 more a year. If nobody left, MRR would be $23,600.
| Price rise | None leave | 5% leave | 10% leave | 20% leave |
|---|---|---|---|---|
| 10%, to $53.90 | $21,560 | $20,482 | $19,404 | $17,248 |
| 20%, to $58.80 | $23,520 | $22,344 | $21,168 | $18,816 |
| 30%, to $63.70 | $25,480 | $24,206 | $22,932 | $20,384 |
A 20.4% rise can lose 16.9% of customers before MRR falls.
share who can leave = 1 − old price ÷ new price
= increase % ÷ (100% + increase %)
$49 divided by $59 is 0.831, and 1 minus that is 16.9%. Of 400 customers, up to 67 can leave and MRR stays at or above $19,600. In the chart in the calculator, that is where the two lines cross.
The share of customers a price rise can lose before MRR falls
The room grows more slowly than the rise. Doubling the price leaves room to lose half of your customers, not all of them.
On Stripe, a new price is a new Price, and current subscribers keep the old one until you move them.
Stripe's documentation says "you can't change a price's amount in the API" and recommends "creating a new price for the new amount", switching to its ID, and making the old price inactive. It also says that if you archive a price, "any existing subscriptions that use the price remain active until they're canceled".
Raising a subscription price on Stripe
- Create a new priceSame product, the new amount.
- Use it for new sign-upsCheckout and links use the new price ID.
- Move existing subscriptionsOr leave them on the old price.
- Archive the old priceSubscriptions on it stay active.
Moving a subscription means updating its item to the new price, which Stripe covers here. Done part way through a billing period, the change is prorated by default; the proration calculator shows what that charges.
Source: Stripe Docs, "Manage products and prices" and "Change the price of existing subscriptions", read 16 October 2026.
A higher price only pays if the customers who stay keep paying. To see what losing some of them costs over a year, use the churn rate calculator. 1Capture collects the first payment in the last 2 hours of a trial and retries it up to 10 times if it fails, as the payment capture page explains.
People also ask these questions about price increases.
How do you calculate a price increase percentage?
Subtract the old price from the new one, divide by the old price and multiply by 100. Going from $49 to $59 is a change of $10, and $10 divided by $49 is 20.4%.
How do you work out a new price from a percentage increase?
Multiply the old price by 1 plus the increase. A 20% increase on $49 is $49 × 1.20, which is $58.80.
How many customers can I lose after a price increase?
Revenue stays level when the share who leave equals 1 minus the old price divided by the new one. From $49 to $59 that is 16.9%: with 400 customers, up to 67 can leave before MRR falls below $19,600.
Is a 20% increase followed by a 20% decrease the same price?
No. The cut is taken from the higher price, so it removes more than the rise added. $49 raised 20% is $58.80, and $58.80 cut 20% is $47.04.
What happens to existing Stripe subscriptions when you raise a price?
Nothing, until you move them. Stripe's documentation says you can't change a price's amount and recommends creating a new price, and that existing subscriptions on an archived price remain active until they're canceled (Stripe Docs, "Manage products and prices", read 16 October 2026).
These free calculators cover the rest of your subscription numbers.
- Trial conversion rate calculatorYour trial-to-paid rate, and what each extra point is worth in MRR.
- Churn rate calculatorCustomer churn, MRR churn and net revenue retention, by month and year.
- Customer lifetime value calculatorLTV from ARPA, margin and churn, with the LTV to CAC ratio.
- MRR and ARR calculatorNet new MRR, ending MRR and ARR, drawn as a waterfall.
- Failed payment recovery calculatorWhat failed payments cost a month and a year, and what recovery saves.
- Stripe fee calculatorThe Stripe fee on any charge, and what you keep.
- PayPal fee calculatorPayPal's fee by how the buyer pays, at its current US rates.
- Square fee calculatorSquare's fee on the Free, Plus or Premium plan, and what you keep.
- Proration calculatorProrate a price by the day, and price a mid-period plan change.
- Gross margin calculatorGross profit, margin and markup, and the price for a target margin.