SaaS MRR Forecasting Calculator
Use this SaaS MRR forecasting calculator to estimate future monthly recurring revenue, ARR run rate, churn impact, and cumulative forecast revenue based on your current MRR, growth rate, churn rate, and forecast period. The model is educational and uses simplified assumptions, so results should be treated as planning estimates rather than financial advice.
How to use this calculator
Enter your current MRR.
Start with your current monthly recurring revenue from active subscriptions.
Choose your monthly growth and churn assumptions.
Growth adds new recurring revenue. Churn removes recurring revenue.
Review ending MRR, ARR run rate, and cumulative forecast revenue.
Use the results to compare scenarios, not as financial advice.
Forecast Inputs
Change assumptions and the model updates instantly.
Scenario presets
Your current monthly recurring subscription revenue.
New recurring revenue added each month as a percentage of starting MRR.
Recurring revenue lost each month from cancellations or downgrades.
Number of months to project from the starting MRR baseline.
Default scenario: $10,000 starting MRR, 8.5% growth, 2.1% churn, and 60 months.
Export or save this forecast for planning notes.
Total forecast revenue
Cumulative revenue across 60 months
$6,708,538
Based on $10,000 starting MRR, 8.5% growth, and 2.1% churn.
Month 60 MRR
Ending recurring revenue
$413,521
ARR run rate
Month 60 annualized
$4,962,253
Net monthly rate
Growth minus churn
6.4%
Interpret this forecast
positive net revenue movement
This scenario shows positive net revenue movement because monthly growth is higher than monthly churn. The model projects MRR expansion over the forecast period, but the result depends heavily on whether the growth and churn assumptions remain realistic over time. Because this is a long-range forecast, small assumption changes can compound into large differences.
Assumption quality check
- Your growth rate is higher than your churn rate, which creates a positive net monthly rate. For stronger planning, compare this forecast with a conservative case using lower growth or higher churn.
- Long-range forecasts are more sensitive to small assumption changes.
Turn this into a plan
Next steps for this scenario
Use the result as a quick scenario, then move into a spreadsheet, methodology check, or related SaaS metric calculator for deeper planning.
Chart summary: In this scenario, MRR grows from $10,000 in month 1 to $413,521 by month 60.
Month 1
$10,640 MRR- Starting MRR
- $10,000
- New MRR
- $850
- Churned MRR
- $210
- ARR
- $127,680
Month 12
$21,052 MRR- Starting MRR
- $19,786
- New MRR
- $1,682
- Churned MRR
- $416
- ARR
- $252,628
Month 24
$44,320 MRR- Starting MRR
- $41,654
- New MRR
- $3,541
- Churned MRR
- $875
- ARR
- $531,839
Month 36
$93,304 MRR- Starting MRR
- $87,691
- New MRR
- $7,454
- Churned MRR
- $1,842
- ARR
- $1,119,644
Month 48
$196,426 MRR- Starting MRR
- $184,611
- New MRR
- $15,692
- Churned MRR
- $3,877
- ARR
- $2,357,107
Month 60
$413,521 MRR- Starting MRR
- $388,648
- New MRR
- $33,035
- Churned MRR
- $8,162
- ARR
- $4,962,253
Assumptions
The model treats growth as new recurring MRR added each month and churn as recurring MRR lost each month. Month 12 MRR is $21,052 with the current inputs.
Formula used in this forecast
Ending MRR = Starting MRR + New MRR - Churned MRR
View formula details
New MRR = Starting MRR x Monthly Growth Rate
Churned MRR = Starting MRR x Monthly Churn Rate
ARR Run Rate = Ending MRR x 12
Educational disclaimer
Aura Revenue provides educational SaaS forecasting estimates only. Results are based on the assumptions entered and should not be treated as financial, investment, tax, or legal advice.
Related SaaS forecasting guides
Calculator FAQ
What is MRR?
MRR means monthly recurring revenue. It is the predictable subscription revenue a SaaS business expects from active recurring plans in a month.
How is ARR run rate calculated?
ARR run rate is calculated by multiplying ending MRR by 12. It annualizes the current recurring revenue base, but it does not guarantee future collections.
Why does churn matter in a forecast?
Churn reduces the recurring revenue base that future growth compounds from. Even small churn changes can materially change long-range SaaS forecasts.
Is this a financial projection?
No. Aura Revenue provides educational scenario estimates based on your inputs. It is not financial, tax, accounting, legal, or investment advice.
How accurate is a SaaS MRR forecast?
A forecast is only as useful as its assumptions. Growth, churn, pricing, expansion, payment failures, and customer behavior can all change actual results.