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Work out what a customer, and a book buyer, is really worth

By Ryan Richardson · Published 8 October 2026

Revenue per buyer is lifetime value multiplied by the rate buyers become paying customers, never the ticket price of the first sale. The close rate most businesses never measure (an unprompted rate, not a sales-pitch rate) is the number that changes the maths most.

Lifetime value, not the first invoice

Most people can't say what a customer is worth to them, only what the first invoice said. That's an easy question with an expensive wrong answer: it prices every acquisition decision off a number that's missing everything the customer pays over the rest of the relationship.

The fix is a fixed formula: revenue per buyer equals lifetime value multiplied by the rate buyers become customers. Lifetime value, not first-ticket price, is the number that belongs on the left side of every acquisition-cost comparison.

The unmeasured close rate

The close rate is the never-measured floor in this formula, and it's worth measuring on its own. Read at the unprompted rate, a typical figure sits around 3%. Sweeping that rate up to roughly 1-in-3 (through better follow-up, not better luck) raises revenue per buyer by something like elevenfold.

That's why the bar in this piece gets built on the low, unprompted end of the range, not the middle. Planning on the optimistic close rate is how a funnel looks fine on a spreadsheet and loses money in production.

What a specific book funnel's numbers looked like

On this book's own funnel, cost per buyer for the founders-and-consultants audience measured at $34, against a lifetime value running into the hundreds of dollars. That's the only row in the cost-per-buyer table that's measured rather than reasoned; every other audience band in the same table (wide consumer at $10 to $15, partners and principals higher still) is an estimate from platform rates, not an actual purchase.

The gap between a measured row and a reasoned row matters more than either number on its own. A reasoned estimate is a placeholder to replace with a real purchase, not a number to plan a launch budget around.

What done looks like

Done means a one-line formula with your own numbers in it: lifetime value, your actual unprompted close rate, and the revenue-per-buyer figure that falls out. Mark every input as measured or reasoned, the same distinction the cost-per-buyer table makes, so nobody later treats a guess as a receipt.

The numbers
ClaimValueSource
Unprompted close rate typically used as the low-end bar3%Measured in Real Money, Field Manual
Revenue-per-buyer uplift from sweeping close rate to roughly 1-in-3~11xMeasured in Real Money, Field Manual
Measured cost per buyer, founders-and-consultants audience$34Measured in Real Money, Field Manual
Matrix difficulty/coverage for this stepEasy / Often skippedThe Sixty Steps matrix
Go deeper

This page covers one step. The full method is in the book.

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