How to Use MRR / ARR Growth Calculator
The MRR / ARR Growth Calculator 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.
Bottom Line
Enter current MRR, ARPU, subscriber growth, and churn to project MRR at 3, 6, and 12 months and see how fast you reach a target ARR milestone.
MRR / ARR Growth Calculator
Project bootstrapped MRR and ARR at 3, 6, and 12 months. See how many months until you hit a target you can live on.
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What It Does
Use the calculator with intent
The MRR / ARR Growth Calculator 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.
SaaS founders who need a 12-month MRR projection they can defend in an investor meeting, or growth teams figuring out whether their churn rate is quietly eating their new-subscriber gains.
Interpreting Results
Current ARR is the baseline; the projected 3-month and 6-month MRR show the trajectory your current growth rate implies. If the projection depends on holding a growth rate you have only hit once, treat it as an upside case and plan against the slower one.
Input Steps
Field by field
- 1
Enter inputs
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
Read outputs
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
Read outputs
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
Use result
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
Re-run
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.
Common Scenarios
Use realistic starting points
Baseline assumptions
Current Mrr
$25,000
ARPU
99
New Subscribers Per Month
50
Churn Rate Percent
3%
Check whether NRR is above or below 100% — if it is below 100%, churn and contractions are outpacing expansion revenue from existing customers, meaning you are acquiring your way to a flat number rather than actually growing.
Higher Current Mrr
Current Mrr
$30,000
ARPU
99
New Subscribers Per Month
50
Churn Rate Percent
3%
A $5,000 MRR increase changes the current ARR figure directly but also lifts the projected MRR at 3 and 6 months because the compounding starts from a higher base. Watch how the 12-month projection changes : a higher starting MRR with the same new-subscriber and churn inputs can move the 12-month figure more than a change in growth assumptions.
Lower ARPU
Current Mrr
$25,000
ARPU
84.15
New Subscribers Per Month
50
Churn Rate Percent
3%
Lower ARPU reduces the revenue added by each new subscriber, which slows MRR growth even with the same subscriber acquisition pace. Check NRR : if it drops below 100% when ARPU falls, existing customers are not expanding fast enough to offset the lower new-subscriber contribution, and any price compression is compounding into your growth ceiling.
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Sources & References
- The SaaS Metrics That Matter — Bessemer Venture Partners
- What is MRR (Monthly Recurring Revenue)? — Chargebee