See whether your existing client base grows on its own, after expansion and churn.
Net revenue retention calculator
Plug in your numbers - it updates as you type.
The percentage of recurring revenue retained from existing clients over time, including expansion and minus churn. Above 100% means you grow even without new clients.
For example, if your clients were worth $50,000 in MRR a year ago and that same group now pays $55,000 - thanks to upgrades and added scope, even after some downgrades and churn - your NRR is 110%. The base grew by itself.
Why it matters to agencies: NRR above 100% means expansion is outrunning churn, so revenue compounds from the clients you already have. It is one of the clearest signals of a healthy agency, and a strong number makes growth far less dependent on constant new-business hustle.
NRR = (starting MRR + expansion − contraction − churn) ÷ starting MRR × 100
Only counts the existing client base - new clients are excluded.
Above 100% means the existing base grows on its own; a sustained 100-110%+ is a strong, healthy NRR for an agency.
The percentage of recurring revenue retained from existing clients over time, including expansion and minus churn. Above 100% means you grow even without new clients.
Take starting MRR, add expansion, subtract contraction and churn, divide by starting MRR, and multiply by 100.
Anything above 100% means the existing client base grows on its own; consistently above 100% is a strong sign of account health.
Gross retention ignores expansion and caps at 100%; NRR includes upsell and expansion, so it can exceed 100%.
Forge builds your metrics dashboard and looks after it - tracking net revenue retention (nrr) live for your whole agency, built around the tools you already use. No spreadsheets, no code on your side.