Portfolio Attrition

Also called merchant attrition, churn, runoff

The rate at which merchants leave a processor's book each year. It drives portfolio value, which is why some processors make leaving expensive.

What it is

Attrition is the annual percentage of merchant accounts or volume that stops processing. It includes merchants who switch providers, merchants who close, and merchants who quietly shrink. Published 2026 benchmarks put traditional terminal-based ISO portfolios at 15-25% annual attrition and ISV or software-embedded portfolios at 5-10%. That gap is the single most important number in the modern ISO business. A book losing 20% a year has to board twenty accounts to net sixteen; a book losing 7% has to board eight. It is also why every acquirer in 2026 is buying or building software - Global Payments with Genius, Fiserv with Clover, Shift4 with SkyTab, Toast in restaurants. Software creates switching costs that rate alone never did. Attrition is directly priced into portfolio valuation. Portfolios under 7% annual attrition earn premium multiples of 40x-46x monthly residual. At 7-12% the range is 36x-42x, at 12-18% it drops to 30x-36x, and above 18% books trade at a steep discount around 28x-30x. A single point of attrition is worth real money on an eight-figure asset. For a merchant, attrition is the industry's honest measure of whether customers are being treated well - and the reason some operators pursue retention through service and others through contract terms.

Why it matters to your business

Attrition tells you what kind of operator you are dealing with before you sign. Ask a prospective processor what their annual merchant attrition rate is and how they measure it. An operator retaining merchants through service will answer. An operator retaining through contract will change the subject to rate. And it explains your leverage. In a business where losing you costs 40x your monthly residual in enterprise value, a credible, documented intention to leave is the most powerful repricing tool you have. It works precisely once a year, so use it deliberately.

Where it gets contested

There are two ways to reduce attrition, and the industry uses both without distinguishing them. The legitimate way is service, software and fair pricing. A merchant integrated into a POS that runs their floor, with an agent who answers the phone and reprices proactively, does not leave. That is why the software-attached books churn at a third of the rate. The other way is friction. Multi-year terms with automatic renewal. Early termination fees - documented reports of $295-$895 charged on accounts merchants were told were month-to-month. Non-cancellable 48-month equipment leases that survive the processing contract. Token export fees and non-solicit clauses on the gateway side that make moving your stored card data expensive or impossible. Each of these lowers attrition without improving anything for the merchant, and each raises the portfolio's sale multiple. What is not said out loud: from a valuation standpoint, an early termination fee and a delighted customer are indistinguishable. Both show up as retained accounts. A buyer paying 42x for a low-attrition book is not auditing which mechanism produced it. That is the incentive, and it is why contract language deserves more of your attention than rate.

How to check it yourself

Before signing anything, get three numbers in writing: contract term length, early termination fee, and whether the equipment lease is separately cancellable. Then ask the rep what their portfolio attrition rate is. After signing, calendar an annual review - the leverage exists whether or not anyone reminds you.

Receipts

Claims above that are checkable, with where to check them. Published so you do not have to take anyone's word for it.

Attrition runs 15-25%/yr for traditional ISO portfolios and 5-10% for ISV/embedded portfolios
acroan.com ↗
Portfolio multiples by attrition: under 7% earns 40x-46x, 7-12% earns 36x-42x, 12-18% earns 30x-36x, over 18% trades near 28x-30x
733park.com ↗
Merchants report being told month-to-month then charged $295-$895 early termination fees
paymentpop.com ↗
Gateway and PayFac platforms can trap merchants with token export fees and non-solicit clauses
rainforestpay.com ↗