How to use this calculator
- Enter current monthly recurring revenue.
- Add expected new monthly growth and churn rate.
- Choose the forecast period to estimate future MRR and ARR.
#744 · Startup Tool
SaaS Forecast Calculator
Forecast future SaaS MRR and ARR using current revenue, monthly growth rate, churn, and forecast period. Use it to compare base growth with the drag created by churn.
Calculator
Decision inputs$
%
%
mo
Ad space
What the result means
The result shows compounding SaaS growth after churn. A strong forecast depends on net growth, not just new sales.
Future MRR = Current MRR × (1 + Growth Rate - Churn Rate) ^ Months.
Small changes in churn create large differences over long forecast periods because SaaS revenue compounds monthly.
Example calculation
With $20,000 current MRR, 12% monthly growth, and 4% churn over 12 months, net monthly growth is 8%, producing a much higher future ARR.
Tips for better results
- Track net revenue retention separately from logo retention.
- Run best, base, and worst cases before setting budget.
- Reduce churn before increasing paid acquisition.
FAQ
How much can my SaaS grow in 12 months?
Enter current MRR, expected growth, and churn. The calculator compounds net growth over 12 months to estimate future MRR and ARR.
What is a healthy SaaS growth rate?
Healthy growth depends on stage, but consistent positive net monthly growth with controlled churn is usually a strong signal.
How does churn affect SaaS revenue?
Churn reduces the compounding base each month. Even high new sales can produce weak growth if churn is too high.
How do I forecast MRR growth?
Use current MRR, monthly growth, churn, and time period. Compound the net monthly rate over the forecast period.
What ARR can I reach next year?
Future ARR is estimated by forecasting MRR for 12 months and multiplying the result by 12.
Related calculators
SaaS Forecast Metrics
| Metric | Meaning |
|---|---|
| Future MRR | Projected monthly recurring revenue |
| Future ARR | Projected annual recurring revenue |
| Net Growth | Growth minus churn |
| Churn Impact | Revenue lost compared with no-churn scenario |
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