#977 · Startup Tool

Investor MRR Calculator

Evaluate MRR growth from an investor perspective, including net new MRR, expansion contribution, churn drag, and revenue momentum. Use it to assess SaaS growth quality before investment.

Calculator

Startup assumptions
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How to use this calculator

  • Enter starting MRR for the period.
  • Add new MRR from new customers.
  • Add expansion MRR from existing customers.
  • Subtract churned MRR from lost customers or downgrades.

What the result means

Investors look for high-quality MRR growth driven by new acquisition and expansion, not growth that is offset by churn.

Net new MRR = new MRR + expansion MRR - churned MRR. Ending MRR = starting MRR + net new MRR. Growth rate = net new MRR ÷ starting MRR.

Separate contraction MRR and churned MRR when possible. This version uses churned MRR as the main negative revenue movement.

Example calculation

Starting MRR is $30,000, new MRR is $7,000, expansion is $3,000, and churn is $2,500. Net new MRR is $7,500 and growth is 25%.

Tips for better results

  • Track new, expansion, contraction, and churn separately.
  • Prefer expansion-led growth with low churn drag.
  • Investigate churn if net new MRR is volatile.
  • Use cohort analysis to confirm revenue quality.

FAQ

What MRR growth do investors want to see?

Investor expectations vary by stage, but early SaaS companies often need strong month-over-month growth and improving revenue quality.

How much MRR is needed for Series A?

There is no fixed MRR threshold, but investors commonly look for meaningful recurring revenue, strong growth, and retention evidence.

Why is net new MRR important?

Net new MRR shows the actual monthly recurring revenue added after churn, making it more useful than new sales alone.

What is healthy expansion MRR?

Healthy expansion MRR indicates existing customers are upgrading, using more, or buying additional products.

How do investors measure recurring revenue quality?

Investors review MRR growth, churn, expansion, NRR, customer concentration, gross margin, and predictability.

Startup decision modules

ModuleWhat it shows
MRR GrowthStarting, net new, and ending MRR.
Expansion QualityHow much growth comes from existing customers.
Churn DragRevenue lost during the period.
Investment SignalWhether growth quality supports diligence.

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