Calculate Member LTV in Seconds

Membership lifetime value (LTV) is the single most useful number for any membership organisation — the clearest measure of true membership value.

To calculate member LTV you multiply what an average member is worth each year by how long they stay; this membership value calculator does that maths for you.

It tells you how much revenue an average member generates across the entire time they stay — and it reframes every marketing decision.

Once you know a member is worth, say, £1,800 over their lifetime, spending £150 to recruit one stops looking like a cost and starts looking like an investment.

The formula to calculate member LTV is deliberately simple.

Take the annual subscription fee, add the average ancillary spend a member makes each year — event tickets, training, certifications, merchandise — and multiply by the average number of years a member stays.

That average tenure is the inverse of your churn rate, so a 12.5% annual churn rate implies an average membership length of eight years; the 2025 Membership Marketing Benchmarking Report puts the sector median renewal rate at 84%.

Subtract the cost to acquire a member and you have net lifetime value.

Divide gross lifetime value by acquisition cost and you get the LTV-to-acquisition ratio, a quick health check that membership specialists put at a minimum of 3:1.

Below that, acquisition is eating too much of each member’s value; comfortably above it, you can usually afford to grow faster.

The figure most organisations underestimate is ancillary spend.

For professional bodies and trade associations especially, what members pay for courses, accreditation and events over a decade often rivals the subscription itself — and all of it depends on members staying engaged.

That is why lifetime value is really a retention and engagement story as much as an acquisition one.

These are not abstract figures.

The membership sector’s most-cited worked example, from Marketing General’s Tony Rossell, takes an average member paying roughly $175 in dues at an 80% renewal rate — a five-year tenure — plus about $50 a year in non-dues spend, for a lifetime value near $1,125 against an average acquisition cost of just $24.

That same study found per-member ancillary spend sits at roughly a fifth of total member value, which is why we set this tool’s ancillary default conservatively rather than at the much larger organisation-level non-dues share of 40–60%.

You can pressure-test the other side of the equation with our churn cost calculator and acquisition vs retention comparator.