STARTUP · SAAS GROWTH
MRR / ARR Growth Calculator
Project where your bootstrapped SaaS lands at 3, 6, and 12 months from current MRR and growth assumptions. See how many months until you hit a target ARR you can live on.
Try a preset
Result
MRR growth trajectory
Projected monthly recurring revenue over time
How to use it
- 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.
- 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.
- 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.
- 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.
- 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.
Questions people usually ask
What is MRR and ARR?
MRR (Monthly Recurring Revenue) is the predictable revenue a SaaS business earns each month from active subscriptions. ARR (Annual Recurring Revenue) is MRR × 12 — the annualised view. Both exclude one-time fees and professional services.
What is Net Revenue Retention (NRR)?
NRR measures what percentage of revenue you retain from existing customers after accounting for churn, downgrades, and expansion (upsells). NRR above 100% means existing customers are worth more over time without new acquisition. Below 100% means churn exceeds expansion.
What is a good NRR for SaaS?
World-class SaaS companies target NRR above 120%. 100-110% is healthy. 90-100% is common for SMB-focused products with higher churn. Below 90% typically means retention is broken and scaling acquisition will accelerate losses.
How is churn modelled in this calculator?
Churn is applied monthly as a percentage of current MRR. New subscriber MRR is added each month based on new subscribers × ARPU. Expansion MRR is added as a flat monthly amount. This is a standard cohort-free approximation — for precision, model each cohort separately.
Is this tool free and private?
Yes. AI Biz Hub tools run entirely in your browser with no signup required. Inputs stay local unless you share the URL.
Is this financial advice?
No. Outputs are planning estimates. Validate with actual cohort data and a qualified financial advisor for fundraising or board-level reporting.
Related Resources
Learn the decision before you act
Every link here is tied directly to MRR / ARR Growth Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
How To Use
3 STEPSHow to Use Burn Multiple Calculator
Evaluate startup capital efficiency by comparing net burn to net new ARR. Learn what your burn multiple means and how to improve it.
ReadHow To Use
6 STEPSHow to Use MRR / ARR Growth Calculator
reveal your subscription business potential! Learn how to use the MRR/ARR Growth Calculator to forecast revenue, set targets, and track performance effectively.
ReadContinue With Related Tools
Calculate personal runway, months to ramen profitable, and months to fully profitable from savings, side income, MRR growth, and personal expenses.
Open →Calculate LTV, CAC, payback period, and break-even customers calibrated for bootstrapped scale. Designed for $5-50/month products with organic or near-zero CAC.
Open →Know exactly how many units you need to sell before a new product, offer, or campaign stops losing money.
Open →Know how many months you have — see when cash runs out under different revenue growth and burn scenarios.
Open →More in Bootstrapped Growth
See when cash runs out, what you need to break even, and how to grow without funding.
Decision Workflows
Step-by-step guides that use this tool.
How to Price Your SaaS Product — A 5-Step Framework
5 steps · targets: "how to price my SaaS product"
Preparing for Fundraising — 5 Numbers Investors Will Ask
5 steps · targets: "preparing for fundraising"
How to Reduce SaaS Churn — A Data-Driven Approach
5 steps · targets: "how to reduce SaaS churn"