Free Resources

Membership Tools & Calculators

Free, interactive calculators that put real numbers on the levers of membership growth: retention, lifetime value, revenue forecasting, churn and early-career ROI.

Each is benchmarked against sector data such as the 82% median renewal rate (MGI 2026). No sign-up, and your figures are never stored.

Put real numbers on retention, lifetime value, revenue forecasting, churn, early-career ROI

Open a calculator →Put the numbers to work

Seven calculators

BENCHMARKRetention
How do you compare?
VALUELifetime value
What is a member worth?
FORECASTRevenue growth
Where will you be in five years?
LEAKChurn cost
How leaky is your bucket?
RECRUITYoung member ROI
Does a discount pay back?
SPENDAcquisition vs retention
Win them, or keep them?
ANYCustomer retention
For any recurring business

82%

Median renewal rate across membership organisations

MGI 2026 ↗

75%

Median first-year renewal rate — where most members are lost

MGI 2024 ↗

01/ the calculators

Seven free membership calculators.

Every tool runs in your browser. Pick the lever you want to measure.

What do you want to know?

The page that answers it

Retention Calculator

Your retention and renewal rates against the 82% median and 75% first-year figure.

Retention rate
Renewal rate
Benchmarks

Membership retention calculator

Benchmarks: 82% median renewal (MGI 2026) · 75% first-year renewal (MGI 2024) · US surveys.

How do you compare?

Retention Calculator

Work out your retention and renewal rates and benchmark them against the 82% sector median — and the 75% first-year figure where most members are lost.

What is a member worth?

Lifetime Value Calculator

Combine subscription and ancillary spend across average tenure to see each member’s lifetime value — and whether your acquisition costs stack up.

Where will you be in five years?

Revenue Growth Forecaster

Project member numbers and annual revenue from your join rate, churn and revenue per member — including the ceiling your numbers are heading towards.

How leaky is your bucket?

Churn Cost Calculator

Quantify the revenue churn drains each year, how it compounds over three years, and what cutting churn by a few points is worth.

Does a discount pay back?

Young Member ROI

Compare the lifetime value of a discounted early-career member against a full-price later joiner to see which is worth more.

Win them, or keep them?

Acquisition vs Retention

Compare the cost of acquiring new members against retaining existing ones — the membership 5× rule — and see what retention could save.

For any recurring business

Customer Retention Calculator

The same retention and churn maths for subscription businesses and clubs — with the membership 82% median as your reference point.

Benchmarks: 82% median renewal (MGI 2026) · 75% first-year renewal (MGI 2024) · US surveys, two editions named separately.

02/ put the numbers to work

Put the Numbers to Work

Once you know where the gaps are, our member retention, member acquisition (with the new member acquisition guide), member engagement and membership strategy services turn the calculator outputs into a plan.

The calculators use the textbook definitions. Retention rate is the customers retained divided by the number at risk of leaving (Marketing Metrics, ch. 5).

They point to the same lever the research does: across five US firms, a 1% gain in retention lifted customer value by 3–7% (Gupta, Lehmann & Stuart, 2004).

When you forecast revenue, remember that a flat fee loses value as prices rise: consumer prices were up 3.1% in the 12 months to August 2026 (ONS).

3–7%Customer value from a 1% gain in retention

3.1%UK CPI inflation, 12 months to Aug 2026

Gupta, Lehmann & Stuart, Journal of Marketing Research, 2004 · peer-reviewed, five US firms · ONS, Consumer price inflation, August 2026 · accredited official statistics.

Turn the outputs into a retention plan, an acquisition plan, an engagement plan, a membership strategy

Keep