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Net revenue retention calculator

Measure how much recurring revenue you keep and grow from existing customers. See your NRR, GRR, and whether your base compounds on its own.

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MRR from existing customers at period start.

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Upgrades, added seats, and usage growth.

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Downgrades to lower tiers or fewer seats.

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MRR fully lost from customers who left.

Net Revenue Retention
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Gross Revenue Retention
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Net New MRR
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Health
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Ending MRR
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Gross MRR Lost
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Expansion Rate
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12-Mo Compounding
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Smart insights

NRR health bands

Where your retention lands against common SaaS thresholds, with what each band implies for growth.

NRR Band Rating What It Means

NRR benchmarks

SMB SaaS
90-100%

typical NRR

Median SaaS
100-110%

typical NRR

Best-in-Class
120%+

enterprise NRR

What is net revenue retention?

NRR is the percentage of recurring revenue you retain from existing customers over a period, after accounting for expansion, contraction, and churn. New-customer revenue is deliberately excluded so you're measuring the health of the base you already have.

Above 100% means your existing customers grow your revenue on their own. That compounding is why NRR is one of the metrics investors scrutinise most closely.

The formula

NRR = (Start + Expansion − Contraction − Churn) / Start × 100

Example: $100K start, +$15K expansion, −$5K contraction, −$8K churn:

(100K + 15K − 5K − 8K) / 100K = 102%
Expansion outpaced losses, so the base grew 2% with zero new customers.
GRR = (Start − Contraction − Churn) / Start × 100

Why retention beats acquisition

100%

The line that matters

NRR above 100% means expansion outweighs churn and contraction combined. Your revenue grows even if acquisition stops. Below 100% and you're acquiring just to replace what's leaking out.

GRR

The honest floor

GRR strips out expansion, so it can't hide a leaky bucket behind a few big upgrades. A high NRR with low GRR means your growth depends on a handful of expanding accounts while the rest churn.

FAQ

Frequently asked questions

What is Net Revenue Retention (NRR)?

NRR measures how much recurring revenue you keep and grow from your existing customers over a period, ignoring any revenue from new customers. It starts with your beginning MRR, adds expansion (upgrades, seats, usage), then subtracts contraction (downgrades) and churn. An NRR above 100% means your existing base is growing on its own, even before you sign anyone new.

What's the difference between NRR and GRR?

Gross Revenue Retention (GRR) only counts what you lose: it subtracts contraction and churn from your starting MRR but never adds expansion. GRR is capped at 100%. NRR adds expansion back in, so it can exceed 100%. GRR tells you how leaky the bucket is; NRR tells you whether expansion is filling it faster than churn drains it.

What is a good NRR for SaaS?

Median SaaS NRR sits around 100-110%. Best-in-class companies, especially those selling to enterprise with usage-based or seat-based pricing, hit 120%+. SMB-focused products typically run lower, often 90-100%, because small customers churn more and expand less. Below 90% means your existing base is shrinking and you're forced to acquire just to stand still.

Why does NRR above 100% matter so much?

When NRR exceeds 100%, your revenue compounds without acquiring a single new customer. If you stopped all sales and marketing tomorrow, you'd still grow. Investors pay a premium for this because it signals product stickiness and pricing power, and it makes growth far cheaper since expansion costs less than acquisition.

How do I improve my NRR?

Pull two levers: increase expansion or reduce churn and contraction. Expansion comes from usage-based pricing, seat growth, upsells to higher tiers, and cross-sells. Reducing churn comes from better onboarding, faster time-to-value, and catching at-risk accounts before renewal. Expansion usually moves NRR fastest because it has no upper bound.

Should I calculate NRR monthly or annually?

Both have a place. Monthly NRR catches problems early and is useful for fast-moving self-serve products. Annual NRR is the standard reported metric and smooths out monthly noise, which matters for contract-based businesses where expansion and churn cluster around renewal dates. Be explicit about the period when you compare against benchmarks.

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Watch your NRR move in real time

Calculators give you a snapshot. Mowt connects to Stripe and tracks NRR, GRR, expansion and churn automatically, so you see the trend before renewal season hits.

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