SaaS MRR Calculator
Break down monthly recurring revenue into new, expansion, contraction, and churned MRR components. Calculate ARR, net new MRR, ARPA, and SaaS Quick Ratio.
Revenue Gains
Revenue from new customers this month
Upgrades, add-ons, seat additions
Revenue Losses
Downgrades and seat removals
Revenue lost from canceled subscriptions
Enter MRR components and click calculate.
What This Calculator Does
This SaaS MRR calculator breaks down monthly recurring revenue into its four components: new MRR (from first-time customers), expansion MRR (upgrades and add-ons), contraction MRR (downgrades), and churned MRR (cancellations). It calculates net new MRR, ARR, average revenue per account (ARPA), and the SaaS Quick Ratio.
The Formula
Net new MRR shows whether the business is growing or shrinking in a given month. The SaaS Quick Ratio measures growth efficiency: how many dollars of new and expansion revenue are generated for every dollar lost to contraction and churn. A ratio above 4.0 indicates strong, efficient growth.
Step-by-Step Example
Enter previous MRR
Last month MRR: $50,000 across 200 active customers.
Add revenue gains
New MRR: $5,000 (20 new customers). Expansion MRR: $2,000 (upgrades).
Subtract revenue losses
Contraction MRR: $1,000 (downgrades). Churned MRR: $1,500 (cancellations).
Calculate metrics
Net new MRR: +$4,500. Current MRR: $54,500. ARR: $654,000. Quick Ratio: 2.80. ARPA: $272.50/mo.
Real-World Use Cases
Monthly Business Review
Track all four MRR components to understand exactly where revenue is coming from and where it is being lost.
Growth Efficiency Analysis
Use the Quick Ratio to determine if your growth is sustainable or if high churn is masking acquisition problems.
Fundraising Metrics
Investors closely examine MRR breakdown, net new MRR trends, and Quick Ratio when evaluating SaaS businesses.
Common Mistakes to Avoid
Only tracking total MRR without decomposing it. A business growing MRR by $3,000 could be adding $10,000 and losing $7,000, which is a very different story than adding $4,000 and losing $1,000.
Confusing new MRR with expansion MRR. New MRR is revenue from first-time customers only. Revenue from existing customers upgrading is expansion MRR.
Not tracking contraction separately from churn. A customer downgrading from $200 to $100 is $100 contraction, not $200 churn.
Ignoring one-time revenue in MRR calculations. Setup fees, implementation charges, and professional services are not recurring and should not be included in MRR.
Frequently Asked Questions
Accuracy and Disclaimer
MRR calculations should follow consistent accounting practices. The definitions of new, expansion, contraction, and churned MRR should be clearly defined and applied uniformly across reporting periods.
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