#911 · Startup Tool

SaaS ARR Calculator

Calculate annual recurring revenue from SaaS MRR, expansion revenue, churn, and monthly growth. This tool estimates current ARR, projected ARR, net new ARR, and a growth health score for SaaS planning.

Calculator

SaaS decision inputs
$
%
$
$
Ad space

How to use this calculator

  • Enter the SaaS operating or financing inputs that match the current month or round.
  • Use recurring revenue only where the input asks for MRR or ARR.
  • Click calculate to see the main result, supporting metrics, health score, and status.
  • Use the result as a planning estimate before making pricing, hiring, fundraising, or cap table decisions.

What the result means

The result shows current ARR and how recurring revenue may grow when monthly growth, expansion, and churn are considered together. Strong ARR quality comes from durable MRR, low churn, and repeatable expansion revenue.

ARR = Current MRR × 12; Projected MRR = Current MRR × (1 + Growth Rate) + Expansion MRR - Churned MRR; Projected ARR = Projected MRR × 12

Use only recurring subscription revenue. Services, setup fees, and non-recurring invoices should not be included in ARR.

Example calculation

If current MRR is $40,000, growth is 8%, expansion MRR is $3,000, and churned MRR is $1,500, projected MRR is $44,700 and projected ARR is $536,400.

Tips for better results

  • Compare the result with several prior months instead of one isolated period.
  • Model conservative, base, and aggressive cases before making decisions.
  • Keep recurring revenue, one-time services, and discounts separate.
  • Review the result together with churn, burn, runway, and ownership impact.

FAQ

How do I calculate ARR from monthly recurring revenue?

Multiply qualified monthly recurring revenue by 12. Include stable subscription revenue and exclude one-time setup, consulting, or usage revenue unless it is contractually recurring.

What ARR growth rate do SaaS investors expect?

Investor expectations vary by stage, but they usually look for consistent ARR growth, improving retention, credible pipeline, and efficient burn rather than one unusually strong month.

How much ARR is needed before raising Series A?

The right ARR threshold depends on market, growth, retention, and capital efficiency. Many SaaS teams use ARR quality and growth consistency as much as the headline number.

How does churn reduce annual recurring revenue?

Churn lowers the MRR base that gets annualized into ARR. High churn also weakens future compounding and can reduce valuation multiples.

Should startups optimize ARR or MRR first?

MRR is better for monthly operating control, while ARR is better for annual planning and fundraising narratives. SaaS teams should track both.

SaaS decision modules

ModuleWhat it shows
Current ARRAnnualized recurring revenue from current MRR.
Projected ARRARR after growth, expansion, and churn impact.
Net New MRRIncremental recurring revenue created this period.
Health ScoreGrowth quality based on expansion and churn balance.

Browse more calculators

Category hubs