MRR is the operating heartbeat. ARR is the investor headline.
Both describe the same underlying revenue base. The timeframe and the audience differ. Understanding which to use requires knowing the decisions each number is meant to inform.MRR is the metric that tells you what is happening right now: how did new sales, churn, expansion, and contraction move your revenue base this month? ARR is the metric that tells investors, boards, and financial models how large your revenue engine is on an annualized basis.
The math and what can distort it
MRR = sum of all active subscription values, normalized to a monthly figure. A customer on a $24,000 annual contract contributes $2,000 of MRR. A customer paying $500 per month contributes $500 of MRR. ARR = MRR x 12, or the direct sum of all annual contract values. For companies with pure annual billing, summing contract values directly is more accurate than multiplying MRR, since multi-year deals and mid-cycle expansions can create rounding discrepancies.| Scenario | MRR impact | ARR impact |
|---|---|---|
| New annual contract signed | +1/12 of contract value | +full contract value |
| Customer churns mid-year | MRR drops immediately | ARR drops immediately |
| Expansion (upsell) | +incremental MRR immediately | +incremental ARR immediately |
| One-time professional services fee | Not included | Not included |
| Multi-year prepay | MRR = annual value / 12 | ARR = annual value only (not total contract) |
Which metric to emphasize by audience
Operational teams (CS, sales, RevOps) run on MRR because monthly granularity makes it easier to detect early signals. A churn spike in MRR is visible within the month it occurs; in ARR it may be obscured by the annualization.
Boards and investors typically want ARR because it maps to how they model SaaS businesses: ARR growth rate, ARR per employee, and ARR multiples are the standard evaluation framework. Net new ARR is the preferred quarterly and annual growth metric in most investor conversations.
The growth and churn interpretation problem
A business can show strong ARR growth while its MRR trajectory is decelerating. This happens when large annual contracts signed earlier in the year mask a slowdown in recent new business. Reporting MRR monthly alongside ARR annually gives leadership a more complete picture of revenue momentum than either metric alone.
For the inverse calculation and definitional nuances, see ARR vs MRR and Annual Recurring Revenue.
Frequently Asked Questions
What is the difference between MRR and ARR?
MRR is your monthly recurring revenue: the normalized monthly value of all active subscriptions. ARR is that figure multiplied by 12, giving you an annualized view of the same revenue base. The underlying customer data is identical; the timeframe differs. MRR is more useful for tracking month-to-month momentum; ARR is more useful for investor reporting and annual planning.
Should I use MRR or ARR for investor reporting?
ARR is the standard for investor reporting in B2B SaaS, particularly for companies with annual or multi-year contracts. It matches the period over which most investors evaluate growth and churn. MRR is more appropriate for early-stage companies with monthly billing or consumer-oriented SaaS where monthly cohort dynamics are the primary lever.
Can I use ARR if my customers pay monthly?
Yes. ARR is a normalized annualized figure, not a billing period. A customer paying monthly on a month-to-month contract can be counted in ARR as 12x their MRR, but you should disclose that the revenue is not contractually committed for the full year. Some companies distinguish between committed ARR (annual contracts) and run-rate ARR (monthly billing annualized) to give investors an accurate picture of revenue durability.
Put these metrics to work
ORM builds custom revenue forecast models that turn concepts like mrr vs arr into prescriptive action for your team.
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