Free · Startup calculator

MRR Growth Calculator

Project your recurring revenue forward at a given monthly growth rate, compounded properly.

Free·No signup·Runs in your browser

Calculated

$31,384

MRR in 12 months

Current MRR $10,000 · Monthly growth rate 10%

Price
Free
Inputs
3
Account needed
No
Last updated
20 September 2026

Use the mrr growth calculator

This free calculator runs in your browser. Nothing is sent to a server, and no account or email is required. Enter:

  • Current MRR — Monthly recurring revenue today.
  • Monthly growth rate — Net growth after churn. 5-10% is strong.
  • Months to project — Accuracy drops sharply past 12-18 months.

How it works

  1. 1

    Enter your numbers

    Fill in current mrr, monthly growth rate and months to project. Nothing is sent anywhere — the maths runs in your browser.

  2. 2

    Press project mrr

    One button. Change any input afterwards and the answer updates as you type.

  3. 3

    Read the result

    You get mrr in 12 months, plus implied arr, mrr added, growth multiple.

How compounding growth works

Projected MRR is current MRR multiplied by (1 + growth rate) raised to the number of months. At $10,000 MRR growing 10% a month, twelve months gives $31,384 — more than three times the starting point, not double.

That gap between intuition and arithmetic is the whole reason to run the numbers. Compounding is unintuitive in both directions: it rewards patience far more than people expect, and it punishes small rate differences far more than people expect.

More on mrr growth

What growth rate to use

Use net growth — new and expansion revenue minus churned and contracted revenue. Gross growth ignores the customers leaving and will overstate every projection you build on it.

For early-stage SaaS, 10% net monthly growth is strong and 15-20% is exceptional but usually temporary. The widely quoted 5% weekly figure from accelerator advice applies to the earliest months off a tiny base, not to a company with meaningful revenue.

Why long projections mislead

Growth rates decay. Maintaining 10% monthly at $10k MRR needs $1,000 of net new revenue; at $100k it needs $10,000; at $1m it needs $100,000 every month. Almost no company holds a constant percentage rate as the base grows, because the absolute amount required grows with it.

Treat anything beyond twelve to eighteen months as an illustration of the maths rather than a forecast. If you are modelling for a board or a raise, step the growth rate down over time — it is both more honest and more credible.

Accuracy and limitations

  • Assumes the growth rate holds every month. Rates decay as the base grows, because holding a percentage means adding ever-larger absolute amounts.
  • Ignores churn beyond whatever you have already netted out of the rate you entered.
  • Accuracy falls away past twelve to eighteen months. Treat longer projections as an illustration of compounding, not a forecast.

Frequently asked questions

How do you calculate MRR growth?
Multiply current MRR by (1 + monthly growth rate) to the power of the number of months. $10,000 growing 10% monthly reaches about $31,384 after twelve months.
What is a good monthly MRR growth rate?
For early-stage SaaS, 10% net monthly growth is strong and 15-20% is exceptional. Expect the percentage to fall as the revenue base grows, since holding a rate means adding ever-larger absolute amounts.
How do I convert MRR to ARR?
Multiply MRR by twelve. It assumes the current monthly run rate holds for a year, which is why ARR is a snapshot of run rate rather than a measure of revenue actually collected.
Should I use gross or net growth?
Net growth — new plus expansion revenue minus churn and contraction. Gross growth ignores departing customers and will overstate any projection built on it.
How far ahead can I reliably project MRR?
Twelve to eighteen months at most. Beyond that, growth-rate decay dominates and a flat percentage stops describing reality.

More ways to run the numbers.

  • Churn Rate Calculator How fast customers leave and what that does to average lifetime. Small churn improvements move lifetime value more than price changes do. Open →
  • SaaS Valuation Calculator A defensible ARR-multiple range driven by growth and margin. Useful before a conversation about price, not instead of one. Open →
Browse all free founder tools →

Get in front of more founders

Launch Llama puts your product in front of 55,000+ founders — directory listing, newsletter feature and backlinks. Free to submit.

Submit your product free