NRR bridge is an analytical breakdown that walks from beginning cohort ARR to ending ARR, isolating churn, downsell, expansion, and reactivation components that compose net revenue retention.

How it works

Start with $10M ARR from customers active twelve months ago. The bridge might show: −$800K logo churn, −$200K contraction, +$1.5M expansion, +$50K reactivation → ending cohort ARR $10.55M → NRR 105.5%. Each bar explains movement; finance teams build bridges monthly or quarterly for board reporting.

Advanced bridges split expansion by product line, segment, or price increase versus seat growth. Some include new logo ARR in adjacent columns but keep it out of NRR numerator/denominator to preserve definition purity.

Visual bridges help executives see whether retention improved because product got better or because sales sold bigger bundles to survivors while small accounts churned quietly. Monthly bridges catch deterioration before it shows up in annual board metrics alone.

Why it matters

• Founders: Use the bridge to allocate customer success and product resources — high contraction suggests packaging or onboarding fixes; high churn suggests core value gaps.
• Investors: Diligence teams request bridges with cohort tags (enterprise vs SMB) to test durability. A single NRR number without components often triggers deeper data requests.

Common mistake

Publishing NRR without a bridge when expansion concentrates in top ten accounts. Headline retention looks healthy while long-tail churn erodes the base.

Related ideas

See also net revenue retention (NRR), negative churn, ARR waterfall, and cohort analysis.