MRR Calculator
Calculate your Monthly Recurring Revenue, net new MRR, growth rate, and ARR. Forecast SaaS revenue accurately.
MRR calculator
Inputs
Changes This Month
$30,000
New + Expansion - Churn
$180,000
End of month
20.0%
Month-over-month
$2,160,000
MRR × 12
Forecast Revenue with HelloGrowthCRM
HelloGrowthCRM's revenue recognition and forecast tools help SaaS finance teams track MRR, forecast ARR, and model growth scenarios.
Understanding MRR and ARR
What does this tool do?
Calculates your total Monthly Recurring Revenue (MRR), net new MRR from new customers and expansions minus churn, month-over-month growth rate, and annualized run rate (ARR).
Why does it matter?
MRR is the single most important metric for SaaS businesses. It reflects predictable, recurring revenue and is a leading indicator of company health and growth trajectory.
Definition
Net New MRR = New MRR + Expansion MRR - Churned MRR. Total MRR = Previous Month MRR + Net New MRR. ARR = MRR × 12.
Assumptions
- MRR includes only contracted recurring revenue, not one-time fees.
- Expansion MRR includes upsells, add-ons, and seat expansions.
- Churn is calculated at the revenue level, not customer count.
How do you interpret your results?
10% MoM growth is a strong SaaS target. 5-7% is healthy. Below 3% suggests slow growth. Strong companies maintain 10-20%+ growth in early stages, then normalize to 3-7% as they mature.
How can you improve your numbers?
Increase new MRR
Scale sales and marketing to acquire more customers. Each new customer adds predictable recurring revenue.
Expand existing customers
Upsell seat additions, premium tiers, or add-on features. Expansion MRR is often more efficient than new customer acquisition.
Reduce churn
Improve onboarding, support, and feature releases. A 1% reduction in churn rate can increase MRR growth by 2-3%.
What the MRR Calculator does
The MRR Calculator tracks the four moving parts of monthly recurring revenue: your starting MRR, new MRR from customers signed this month, expansion MRR from upgrades, and churned MRR from cancellations and downgrades. From those inputs it returns your ending MRR, net new MRR, month-over-month growth percentage, and annual run rate (ARR).
Why break MRR into components? Because a single revenue number hides the story. Two businesses can both grow modestly — one adding customers steadily with almost no churn, the other signing impressive new logos while existing customers leak away. The first is compounding; the second is on a treadmill. Only the component view tells you which one you are.
The calculator suits SaaS founders, subscription businesses, and agencies on retainers — anyone whose revenue renews monthly and who wants investor-grade metrics without building a spreadsheet model first.
How to use the MRR Calculator
Enter your starting MRR
The total contracted monthly recurring revenue at the start of the month. Normalize annual contracts to a monthly figure by dividing by twelve.
Add new and expansion MRR
New MRR comes from customers signed this month; expansion MRR from existing customers upgrading, adding seats, or buying add-ons. Keeping them separate shows whether growth comes from selling or serving.
Enter churned MRR
Include both cancellations and downgrades. This is the number teams most often forget to record — and the one that most changes the conclusion.
Review growth rate and run rate
The calculator returns ending MRR, net new MRR, MoM growth %, and ARR. Watch net new MRR month over month — its trend predicts your trajectory better than any single total.
How to read your results
Net new MRR is positive and growing
The engine works. Now check the mix: if expansion is contributing meaningfully, your product deepens with use — a strong signal. Keep acquisition steady and protect onboarding quality as volume rises.
Growth is positive but churn takes a big bite
You are refilling a leaking bucket. Compare churned MRR against new MRR: if churn exceeds half of new sales, retention work — onboarding, check-ins, success milestones — will outperform more marketing spend.
Growth is flat with low churn
You keep customers but struggle to add them. The constraint is pipeline: lead flow, follow-up speed, or win rate. This is a sales-process problem, not a product problem.
MoM growth swings up and down sharply
Usually a sign of lumpy deals or inconsistent recording — annual contracts booked as one-month spikes, or churn logged late. Normalize contracts monthly and record changes in the month they happen, or the trend line will keep lying to you.
Real-world examples
A founder preparing for an investor call
Asked for MRR growth over six months, the founder reconstructed each month's components in the calculator. The story was better than expected — churn had halved after an onboarding fix — and the component-level numbers let him show why growth was accelerating, not just that it was.
An agency moving clients to retainers
Shifting from project work to monthly retainers, the owner used the calculator to track retainer MRR separately. Watching expansion MRR grow as clients added services convinced her to build a formal upsell step into every quarterly review.
A SaaS team debating a price increase
Before raising prices, the team recorded a clean baseline: MRR, growth rate, churned MRR. After the increase, expansion MRR jumped while churn ticked up only slightly — net new MRR rose. Without component tracking, the churn uptick alone might have caused a panicked rollback.
Related free tools
MRR Calculator — frequently asked questions
Quick answer
What is a good MoM growth rate?
- What should be included in MRR
- What is the difference between MRR and ARR
- Why does net new MRR matter more than total MRR