Membership Revenue Growth Forecaster

Membership growth is a tug of war between two forces: the new members you recruit and the members you lose to churn.

This forecaster models that tension year by year.

Each year it keeps the members you retain — your current base multiplied by one minus your churn rate — and adds the new members you recruit, then values the result at your average revenue per member.

The number that surprises most organisations is the ceiling.

Growth does not continue indefinitely; it settles where annual joins exactly replace annual losses, at roughly joins ÷ churn rate.

Recruit 150 members a year against 15% churn and you plateau near 1,000 members no matter how hard you push acquisition.

The only way to lift that ceiling is to reduce churn — which is why the cost of churn is worth understanding alongside this forecast.

Use it to pressure-test targets.

If the five-year revenue figure falls short of your plan, the model shows whether the faster route is more acquisition or better retention — usually it is retention.

For trade associations and professional bodies alike, the lever that compounds fastest is keeping each cohort longer.

For a realistic churn input, the 2025 Membership Marketing Benchmarking Report puts the median association renewal rate at 84% (around 16% churn) and the first-year renewal rate at just 74% — so newer cohorts churn far faster, and your blended rate depends heavily on how many first-year members you carry. Not sure of your own rate? Work it out first with the membership retention calculator.

The same report is a useful reality check on ambition: only 45% of associations grew their membership in the past year, and 49% raised their dues. A forecast built on honest joins, churn and revenue-per-member inputs — informed by your member lifetime value — tells you early which camp you are heading for.