ARR vs MRR: What's the Difference and Why Both Matter
Understand the key differences between Annual Recurring Revenue (ARR) and Monthly Recurring Revenue (MRR), when to use each metric, and how both drive SaaS business decisions.
If you're new to SaaS metrics, one of the first questions you'll encounter is: should I track ARR or MRR? The answer, of course, is both. But understanding when and why to use each one is critical to running your business effectively.
What Is MRR?
Monthly Recurring Revenue (MRR) measures the predictable revenue your business generates from active subscriptions each month. It's your most granular view of recurring revenue performance.
MRR is calculated by multiplying your total number of paying customers by your average revenue per user (ARPU). You can use our MRR calculator to compute it instantly.
MRR is ideal for:
- Short-term planning and forecasting
- Tracking month-over-month momentum
- Early-stage companies where monthly changes are significant
- Identifying trends quickly
What Is ARR?
Annual Recurring Revenue (ARR) is simply MRR multiplied by 12. It represents the annualized value of your subscription revenue. ARR is the metric most commonly used by investors, board members, and executives because it provides a bigger-picture view of business scale.
ARR is ideal for:
- Long-term strategic planning
- Investor communications and fundraising
- Company valuation calculations
- Mature businesses with stable revenue patterns
Key Differences
| Dimension | MRR | ARR |
|---|---|---|
| Time horizon | Monthly | Annualized |
| Best for | Tactical decisions | Strategic decisions |
| Volatility | Higher (captures short-term changes) | Lower (smoothes out monthly noise) |
| Investor preference | Early-stage | Growth-stage and beyond |
| Calculation | Sum of monthly subscription revenue | MRR × 12 |
When to Use Each
Use MRR when:
You're making tactical decisions about pricing, onboarding, or go-to-market execution. MRR's sensitivity makes it ideal for A/B testing pricing changes, measuring the impact of a new marketing campaign, or tracking weekly performance.
Use ARR when:
You're communicating with investors, setting annual goals, or calculating valuation. ARR is the standard metric for SaaS company valuation, typically commanding multiples of 10x to 30x for high-growth companies.
How They Work Together
The best SaaS teams track both. MRR tells you what happened this month and what to do about it. ARR tells you whether you're building a valuable company. Our SaaS Metrics Dashboard lets you track both simultaneously.
Use our ARR calculator to annualize your MRR, or go the other direction with the MRR calculator. Understanding both metrics gives you a complete picture of your business health.
Common Mistakes
- Using ARR too early: If you're under $1M ARR, monthly changes are too significant to smooth into an annual number
- Using MRR for investor updates: Investors think in ARR terms; present your numbers accordingly
- Not tracking both: Each metric provides unique insights — don't pick one at the expense of the other
Track your recurring revenue with our MRR calculator and ARR calculator today.