MRR Growth Calculator
MRR growth with churn built.
Project monthly recurring revenue growth over months with churn. Enter mrr to see mrr growth over months including monthly growth rate and churn.
What this tool does
This calculator projects how your monthly recurring revenue (MRR) will evolve over a chosen timeframe, factoring in both new growth and customer churn. It models revenue by applying your monthly growth rate and monthly churn rate to your current MRR, compounding the net effect across the projection period. The result shows estimated MRR at each month, illustrating the combined impact of expansion and attrition. Monthly churn—the percentage of revenue lost each month—typically has the strongest influence on the trajectory, especially over longer periods. A common scenario involves forecasting subscription revenue for a 12-month business plan. The calculator assumes linear, consistent rates month-to-month and does not account for seasonal variation, pricing changes, one-time adjustments, or shifts in growth or churn patterns. Results are estimates for financial modelling only.
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
MRR (Monthly Recurring Revenue) growth with churn shows realistic trajectory. 10% growth with 5% churn nets 5% - half what growth looks like on paper. This calculator projects MRR forward given both rates.
10,000 MRR with 15% monthly growth, 5% churn = 10% net. Over 12 months: 31,400. Over 24: 98,500 - 10x in 2 years. Growth compounds fast in SaaS.
Use to forecast when funding is needed, headcount planning, or hitting specific milestones. Reality check: 5%+ net monthly growth is early-stage; 2-3% is mature SaaS; 1% or less signals product-market fit issues.
A worked example
Try the defaults: current mrr of 10,000, monthly growth rate of 15%, months to project of 12, monthly churn of 5%. The tool returns 31,384.28. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.
What moves the number most
The result responds to Current MRR, Monthly Growth Rate, Months to Project, and Monthly Churn. The rate and the time horizon usually dominate — compounding means a small change in either reshapes the final figure more than a similar shift in contribution size. Test this by doubling one input at a time.
The formula behind this
Final MRR = current × (1 + net growth)^months, where net = growth - churn. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.
What the score tells you
Headline financial numbers — income, savings, debt — each tell part of the story. This calculation stitches several together into a single read you can track over time. The value is in the direction, not the absolute number.
What this doesn't capture
The score is a composite of the inputs you provide. Life context — job security, family obligations, health, housing — doesn't appear in the math but shapes the real picture. Use the number as a prompt, not a verdict.
££10,000 × 15% growth - 5% churn × 12mo = 31,384.28.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes forward-looking monthly recurring revenue by applying a compound growth model. It takes your current MRR and applies a net growth rate—calculated as the monthly growth rate minus the monthly churn rate—compounded over the specified number of months. The formula treats growth and churn as constant rates throughout the projection period. The model assumes no seasonal variation, no changes to pricing, and no lag between customer acquisition and revenue recognition. It does not account for one-time revenue, implementation fees, customer acquisition costs, or variations in churn and growth rates across cohorts. Results reflect a simplified projection under stable operating conditions and should be viewed as a baseline rather than a forecast.
References
Frequently Asked Questions
Net 2% vs 5% - big deal?
Why does churn have such a large effect on long-term MRR projections?
What inputs do I need to use this calculator accurately?
Can I use this calculator to model expansion revenue or upsells?
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