How to Use MRR / ARR Growth Calculator
The MRR/ARR Growth Calculator is a powerful tool designed to visualize the potential future revenue of a subscription-based business. By inputting your current recurring revenue and an expected growth rate, it projects your MRR or ARR over a defined period. This allows businesses to understand the impact of their growth strategies on their bottom line.
What It Does
Use the calculator with intent
The MRR/ARR Growth Calculator is a powerful tool designed to visualize the potential future revenue of a subscription-based business. By inputting your current recurring revenue and an expected growth rate, it projects your MRR or ARR over a defined period. This allows businesses to understand the impact of their growth strategies on their bottom line.
This calculator is indispensable for SaaS founders, subscription-based businesses, product managers, and financial analysts. It's perfect for setting ambitious yet realistic revenue targets, preparing for investor pitches, evaluating the impact of marketing and sales strategies, or simply forecasting financial health for strategic decision-making.
Interpreting Results
Start with Current Arr. Then compare Projected Mrr3m and Projected Mrr6m before deciding what changes the answer most.
Input Steps
Field by field
- 1
Current Mrr + Arpu
Enter your current MRR (or leave at 0 and set ARPU + subscribers to derive it), monthly new subscribers, ARPU, churn rate, expansion MRR from upsells, and optionally a target ARR milestone.
- 2
New Subscribers Per Month + Churn Rate Percent
Read current MRR/ARR, projected MRR at 3, 6, and 12 months, and Net Revenue Retention. NRR above 100% means existing customers are growing faster than they churn — a core SaaS health signal.
- 3
Expansion Mrr Per Month + Projection Months
Interpret the MRR trajectory chart to see if growth is compounding or flattening. A flattening curve with high churn often means new subscriber additions are just backfilling churned revenue rather than growing the base.
- 4
Target Arr
Use the months-to-target-ARR output as a reality check on fundraising timelines or hiring plans. If the number is beyond your runway, either reduce churn, increase new subscriber velocity, or reprice to raise ARPU.
- 5
Setup
Re-run monthly with actual cohort data. Track NRR and MRR growth rate separately — NRR tells you if your product earns expansion; net new MRR growth tells you if your GTM is working.
- 6
Setup
Enter setup with realistic baseline assumptions before moving to sensitivity checks.
Run one base case and one sensitivity case before trusting a single output.
Common Scenarios
Use realistic starting points
Baseline assumptions
Current Mrr
$25,000
Arpu
99
New Subscribers Per Month
50
Churn Rate Percent
3%
Start with current arr and compare it with projected mrr3m before changing anything.
Higher Current Mrr
Current Mrr
$30,000
Arpu
99
New Subscribers Per Month
50
Churn Rate Percent
3%
Watch how current arr shifts when current mrr changes while the rest stays steady.
Lower Arpu
Current Mrr
$25,000
Arpu
84.15
New Subscribers Per Month
50
Churn Rate Percent
3%
Watch how current arr shifts when arpu changes while the rest stays steady.
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FAQ
Questions people ask next
The short answers readers usually want after the first pass.
Sources & References
- The SaaS Metrics That Matter — Bessemer Venture Partners
- What is MRR (Monthly Recurring Revenue)? — Chargebee