Comparison
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ARR vs MRR: Key Differences Explained
Quick Answer
ARR (Annual Recurring Revenue) and MRR (Monthly Recurring Revenue) both measure a SaaS company's recurring revenue — MRR tracks it monthly, ARR annualizes it. MRR is better for tracking growth momentum month-to-month; ARR is the standard metric for investor conversations and valuations.
What is ARR?
ARR (Annual Recurring Revenue) is the annualized value of a company's recurring revenue from subscriptions and contracts. It normalizes all recurring revenue to a 12-month figure, making it the standard benchmark for SaaS company size and valuation.
Formula: ARR = MRR × 12 (for monthly subscriptions) or the sum of all annual contract values.
ARR is used for investor reporting, fundraising conversations, and revenue multiples. When a VC says a company is 'doing $5M ARR,' they mean the company is generating revenue at a $5M annual run rate from recurring sources.
Example: A SaaS company with 100 customers each paying $5,000/year has $500K ARR. If they add 20 more customers next month, ARR jumps to $600K.
What is MRR?
MRR (Monthly Recurring Revenue) is the total normalized recurring revenue a company generates each month. It's the most operationally useful metric for tracking growth, churn, and expansion on a short time cycle.
MRR breaks down into components that tell a rich story: New MRR (from new customers), Expansion MRR (from upgrades), Contraction MRR (from downgrades), and Churned MRR (from cancellations). Together these drive Net MRR growth.
Formula: MRR = Number of customers × Average monthly subscription revenue.
MRR is the pulse check of a SaaS business. Founders should review it weekly or monthly. ARR is how you communicate with investors; MRR is how you run the business.
Example: A company with 200 customers at $250/month has $50K MRR = $600K ARR.
Key Differences
| Feature | ARR | MRR |
|---|---|---|
| Time horizon | Annualized (12-month view) | Monthly snapshot |
| Primary use | Investor reporting, valuations, fundraising | Operational tracking, team dashboards |
| Formula | MRR × 12 or sum of annual contracts | Customers × Average monthly subscription |
| Growth tracking | Year-over-year comparisons | Month-over-month momentum |
| Includes one-time revenue? | No — recurring only | No — recurring only |
| Churn visibility | Lower — annual smoothing hides monthly swings | High — churn shows up immediately each month |
| Benchmark stage | $1M ARR = seed/early Series A milestone | $100K MRR = common early-stage milestone |
When Founders Choose ARR
- →Talking to investors — ARR is the standard language in fundraising conversations
- →Calculating revenue multiples for valuation discussions
- →Reporting year-over-year growth to the board
- →Comparing your company against benchmark data (e.g., 'T2D3' growth path)
When Founders Choose MRR
- →Tracking growth momentum week-to-week or month-to-month
- →Running churn and expansion analysis — MRR breaks down by cohort
- →Setting sales targets and growth rate goals for the current quarter
- →Early-stage companies where annual contracts aren't yet common
Example Scenario
A founder is preparing for a Series A. She tells investors: 'We're at $2.4M ARR, growing 15% month-over-month.' Internally, her team tracks MRR: $200K MRR in January, rising to $230K in February after onboarding two new enterprise contracts. Churned MRR was $8K (one SMB customer). Expansion MRR was $38K (two upgrades). Net new MRR: +$30K.
The ARR ($2.4M) communicates scale. The MRR breakdown tells the team exactly where growth is coming from — and where it's leaking.
Common Mistakes
- 1Including one-time fees, professional services, or non-recurring revenue in ARR or MRR — these inflate the number and mislead investors
- 2Converting monthly contracts to ARR by multiplying, then including annual contracts at face value — this double-counts revenue
- 3Confusing 'run rate ARR' with actual trailing twelve months revenue — ARR is a forward-looking snapshot, not historical revenue
- 4Ignoring MRR churn because 'ARR looks fine' — annual smoothing can hide monthly churn spikes that signal trouble
Which Matters More for Early-Stage Startups?
Both. Use MRR to run your business; use ARR to talk to investors. The real mistake is running on ARR when you should be watching MRR — monthly churn and expansion tells you what's actually happening before it shows up in annual numbers. Most early-stage SaaS founders should obsess over MRR until they have a mix of monthly and annual contracts, then transition to ARR as their primary reporting metric.
Related Terms
Frequently Asked Questions
What is ARR?
ARR (Annual Recurring Revenue) is the annualized value of a company's recurring revenue from subscriptions and contracts. It normalizes all recurring revenue to a 12-month figure, making it the standard benchmark for SaaS company size and valuation. Formula: ARR = MRR × 12 (for monthly subscriptions) or the sum of all annual contract values. ARR is used for investor reporting, fundraising conversations, and revenue multiples. When a VC says a company is 'doing $5M ARR,' they mean the company is generating revenue at a $5M annual run rate from recurring sources. Example: A SaaS company with 100 customers each paying $5,000/year has $500K ARR. If they add 20 more customers next month, ARR jumps to $600K.
What is MRR?
MRR (Monthly Recurring Revenue) is the total normalized recurring revenue a company generates each month. It's the most operationally useful metric for tracking growth, churn, and expansion on a short time cycle. MRR breaks down into components that tell a rich story: New MRR (from new customers), Expansion MRR (from upgrades), Contraction MRR (from downgrades), and Churned MRR (from cancellations). Together these drive Net MRR growth. Formula: MRR = Number of customers × Average monthly subscription revenue. MRR is the pulse check of a SaaS business. Founders should review it weekly or monthly. ARR is how you communicate with investors; MRR is how you run the business. Example: A company with 200 customers at $250/month has $50K MRR = $600K ARR.
Which matters more: ARR or MRR?
Both. Use MRR to run your business; use ARR to talk to investors. The real mistake is running on ARR when you should be watching MRR — monthly churn and expansion tells you what's actually happening before it shows up in annual numbers. Most early-stage SaaS founders should obsess over MRR until they have a mix of monthly and annual contracts, then transition to ARR as their primary reporting metric.
When would you encounter ARR vs MRR?
A founder is preparing for a Series A. She tells investors: 'We're at $2.4M ARR, growing 15% month-over-month.' Internally, her team tracks MRR: $200K MRR in January, rising to $230K in February after onboarding two new enterprise contracts. Churned MRR was $8K (one SMB customer). Expansion MRR was $38K (two upgrades). Net new MRR: +$30K. The ARR ($2.4M) communicates scale. The MRR breakdown tells the team exactly where growth is coming from — and where it's leaking.
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