NDR (Net Dollar Retention)

What is NDR?

NDR (Net Dollar Retention) is the percentage of recurring revenue retained from existing customers over a period, including expansion revenue from upgrades, seat additions, and cross-sell. It is mathematically identical to NRR (Net Revenue Retention) — both terms describe the same calculation. The term variation reflects industry convention rather than substantive difference: investor decks and analyst reports tend to use 'NDR'; operator dashboards and SaaS-blog literature tend to use 'NRR'.

NDR captures the full economic effect of the existing customer base over a defined period. NDR above 100% means the existing book grows in revenue without adding new logos — a structurally efficient growth model where customer expansion exceeds churn and contraction. NDR below 100% means the existing book shrinks, requiring new acquisition just to stay flat.

For SaaS valuation, NDR / NRR is the single most important retention metric. Public SaaS companies with NDR above 130% command 2.5–4× the revenue multiple of companies with NDR below 100%. The premium reflects the structural advantage of growing from existing customers without acquisition cost — a model investors recognise as durable and high-margin.

Why NDR matters for operators

NDR determines whether the existing customer cohort is an asset or a liability. A cohort with 115% NDR generates more revenue each year than the year before, even before any new logos are added — a compounding revenue base. A cohort with 90% NDR shrinks by 10% annually, requiring new-acquisition revenue just to keep the book level.

NDR is also the central input to GTM strategy. A high-NDR company can grow primarily through expansion motion (account-based selling, upsell programs, seat-based pricing) and treat new acquisition as additive growth. A low-NDR company must grow through acquisition first, with expansion as secondary — a fundamentally different go-to-market.

The operator trap is celebrating high NDR while gross retention deteriorates. NDR can be flattered by aggressive expansion that masks rising gross churn. The discipline is reporting NDR alongside GRR — a company with 112% NDR built on 95% GRR + 17% expansion is a different business than one built on 82% GRR + 30% expansion.

NDR formula

NDR / NRR (%) =
  (Starting MRR + Expansion MRR − Churned MRR − Contraction MRR)
  / Starting MRR × 100

Equivalent expression:
  NDR = GRR + Expansion Rate
  NDR = 100% − Net Churn

Example — mid-market SaaS, 12-month period:
  Starting cohort MRR (Apr 2024):              $880,000
  Cohort expansion (12 months):                $145,000  (16.5%)
  Cohort churn (12 months):                    $89,000   (10.1%)
  Cohort contraction (12 months):              $14,000   (1.6%)

  Ending cohort MRR (Apr 2025):                $922,000

  NDR = $922,000 / $880,000 = 104.8%
  GRR = ($880,000 − $89,000 − $14,000) / $880,000 = 88.3%
  Expansion contribution = 16.5%

NDR = GRR + Expansion = 88.3% + 16.5% = 104.8% ✓

Decomposed view shows the components clearly:
  Gross retention is healthy mid-market range (88.3%).
  Expansion is healthy (16.5%) — but barely covers the churn gap.
  NDR sits at the bottom of the healthy growth-stage range.

NDR benchmarks by stage

Sources: Bessemer State of the Cloud 2025; ChartMogul SaaS Benchmarks 2025; KeyBanc SaaS Survey 2025; ICONIQ Topline Report 2025; Fairview customer data.

Common mistakes when measuring NDR

1. Reporting NDR without GRR. NDR can be flattered by aggressive expansion masking rising gross churn. Always pair NDR with GRR — the components matter.

2. Including new logos in NDR. NDR measures the existing cohort's revenue trajectory only. Some teams accidentally include new-customer revenue in NDR calculations, inflating the number. The correct calculation isolates the same set of customers between period start and period end.

3. Mixing time windows. Trailing-12-month NDR and quarterly NDR are different windows; comparing them produces misleading conclusions. Pick one cadence (TTM is the public-SaaS standard) and report consistently.

4. Computing NDR at the segment level only. A 115% company-wide NDR built on 130% enterprise NDR + 88% SMB NDR has very different forward dynamics than a flatter 115% / 115% distribution. Segment-level NDR shows where the retention engine actually works.

5. Treating NDR as a single-number target. NDR drift over 2–3 quarters is more informative than the absolute level. A company at 108% with rising trajectory is healthier than one at 118% with declining trajectory; absolute NDR alone misses this.

How Fairview tracks NDR

Fairview's Operating Dashboard tracks NDR alongside GRR, segmented by ICP, ARR band, and acquisition source — and surfaces trajectory rather than just absolute level.

The Next-Best Action Engine flags structural drift: "Trailing 12-month NDR is 109% (within healthy range), but trajectory has compressed from 116% → 113% → 109% over three quarters. Decomposition: GRR has held at 92%; expansion rate has dropped from 24% to 17%. Recommend an expansion-motion review — pricing structure, upsell playbook, customer success expansion targets."

→ See how Fairview tracks NDR

NDR vs NRR vs net churn

NRR and NDR are interchangeable; net churn is the inverse. Companies typically pick one and use it consistently — the choice signals whether the audience is investor-facing or operator-facing.

Frequently asked questions

Sources

1. Bessemer State of the Cloud 2025
2. ChartMogul SaaS Benchmarks 2025
3. KeyBanc SaaS Survey 2025
4. ICONIQ Growth Topline Report 2025
5. Fairview customer data (B2B SaaS, 2025)