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MRR Calculator for Monthly Recurring Revenue and SaaS Growth

Calculate ending MRR, net new MRR, MRR growth rate, recurring revenue gains and losses, SaaS quick ratio and ARR run rate from one month of subscription movements.

Monthly Recurring Revenue Inputs

Use one currency for all monetary inputs. $ labels do not convert currencies.

Use monthly-normalized recurring revenue for one consistent month. Exclude one-time fees, taxes and nonrecurring services.

Monthly-normalized recurring revenue at the beginning of the month.
MRR from customers who became paying customers during this month.
Additional MRR from existing customers through upgrades, seats, add-ons or recurring usage growth.
MRR lost when existing customers downgrade or reduce recurring usage but remain active.
MRR lost when a paying customer cancels the final recurring subscription under your reporting definition.
Ending MRR -
Net New MRR -
MRR Growth Rate -
Recurring Revenue Gains -
Recurring Revenue Losses -
SaaS Quick Ratio -
ARR Run Rate -
MRR Growth Signal -

Example: Monthly SaaS MRR Movement

Starting MRR: $100,000

New MRR: $12,000

Expansion MRR: $8,000

Contraction MRR: $3,000

Churned MRR: $5,000

Ending MRR: $112,000

Net new MRR: $12,000

MRR growth: 12.0%

Revenue gains: $20,000

Revenue losses: $8,000

SaaS quick ratio: 2.50x

ARR run rate: $1,344,000

Normalize annual and quarterly contracts to a monthly amount before entering them. This simplified calculator does not include a separate reactivation MRR field.

MRR Growth Formulas

Ending MRR = Starting MRR + New MRR + Expansion MRR - Contraction MRR - Churned MRR Net New MRR = New MRR + Expansion MRR - Contraction MRR - Churned MRR MRR Growth Rate = Net New MRR / Starting MRR x 100 Recurring Revenue Gains = New MRR + Expansion MRR Recurring Revenue Losses = Churned MRR + Contraction MRR SaaS Quick Ratio = Recurring Revenue Gains / Recurring Revenue Losses ARR Run Rate = Ending MRR x 12

Normalize recurring revenue: An annual $1,200 subscription contributes $100 of MRR, not $1,200 in one month.

Movement categories: Keep new, expansion, contraction and churn mutually exclusive.

Run rate: ARR run rate annualizes current MRR; it is not recognized annual revenue.

What Belongs in an MRR Calculation

Starting MRR: recurring revenue already active at the start of the month. New MRR: recurring revenue from newly paying customers, not one-time setup revenue. Expansion MRR: additional recurring revenue from existing customers. Contraction MRR: recurring revenue lost to downgrades while the customer remains active. Churned MRR: recurring revenue lost when the paid relationship falls to zero.

Keep movement categories mutually exclusive and reconcile them to billing data before comparing MRR growth across months.

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 SaaS & Software 
 MRR, net new MRR and SaaS recurring revenue guide 
 Learn how to calculate monthly recurring revenue, normalize annual plans, classify MRR movements, measure net new MRR and interpret SaaS growth. 
 Read the complete guide  Browse all guides 
 MRR Calculator Frequently Asked Questions 
 Use these answers to keep monthly recurring revenue, net new MRR and subscription movement definitions consistent. 
 Normalize each active recurring subscription to a monthly amount and sum the eligible recurring revenue. For movement analysis, ending MRR equals starting MRR plus new and expansion MRR minus contraction and churned MRR. 
 Net new MRR is the net change created by recurring revenue movements during the month: new MRR plus expansion MRR minus contraction MRR and churned MRR. Positive net new MRR increases the recurring revenue base. 
 Divide annual recurring contract value by 12 and quarterly recurring contract value by 3. A $1,200 annual subscription therefore contributes $100 of MRR, assuming the full amount is recurring subscription value. 
 MRR is the monthly-normalized recurring revenue run rate. ARR annualizes that recurring base, commonly as MRR multiplied by 12. Neither metric is the same as accounting revenue recognized or cash collected. 
 No separate reactivation field is included. Some SaaS systems classify revenue from a previously churned customer returning as reactivation MRR. If your reporting framework uses that category, track it separately and reconcile it consistently rather than silently mixing definitions. 
 Move between acquisition efficiency, recurring revenue, retention and lifetime unit economics without mixing their formulas. 
 ARR Calculator - annualize current recurring revenue  SaaS Churn Calculator - isolate customer and revenue losses  NRR Calculator - measure revenue retained from existing customers  CAC Payback Calculator - connect recurring gross profit with acquisition recovery  SaaS LTV:CAC Calculator - connect recurring economics with acquisition cost 
 MRR Calculator Disclaimer:  This calculator is a management and planning tool, not a GAAP revenue-recognition calculation. It assumes all inputs are correctly normalized recurring revenue movements for one consistent month. Billing timing, credits, refunds, usage accounting, foreign exchange, reactivation policy and subscription-status rules can change reported MRR. Reconcile the output with your billing and finance source of truth before using it for forecasting, valuation or investor reporting.