Two books earn 50,000 dollars a month. One sells for years more income than the other. The difference is almost always attrition. It is the first number a serious buyer computes and the last number they argue about before closing.
The three attrition numbers buyers run
- Account attrition. The share of merchant accounts lost over a trailing period, usually twelve months. Simple, but crude: it treats your biggest merchant and your smallest the same.
- Revenue attrition. The share of residual dollars lost over the same period. This is the one that drives price, because a book can lose 20 percent of its accounts and only 3 percent of its income if the losses are small merchants, or the reverse.
- Volume attrition. Processing volume drifting away while accounts technically stay open, usually a merchant splitting volume with a competitor. It shows up before cancellations do, and good buyers look for it.
Buyers also split losses into controllable and uncontrollable: merchants who left for a competitor versus merchants who went out of business. A book that loses merchants to closures is healthier than one losing them to better offers, even at the same rate.
Why the trend matters as much as the level
A buyer pricing your book is really forecasting it. Trailing twelve month attrition sets the baseline, but the direction of the last two or three quarters sets the confidence. Improving attrition supports a price at the top of the range. Deteriorating attrition invites holdbacks, earnouts, and clawback language that shift risk back onto you. If you want the cleanest structure, sell the trend, not just the level.
Processor, BIN, and portability
Where your book lives affects who can buy it. Books on major platforms with standard reporting are easy to diligence and easy to move, so more buyers can bid. Restrictive sponsorship or BIN arrangements, or agreements that require consent to transfer, shrink the buyer pool before price is even discussed. If you are not sure what your agreement allows, read our guide to your contract rights when selling residuals before you talk to anyone.
What to fix before you go to market
- Lock in your largest merchants and address any concentration a buyer will flag.
- Fix the service and pricing issues that cause controllable churn.
- Reconcile your residual reporting so the diligence file matches the statements.
- Document your retention story: tenure, contract status, and why merchants stay.
Then get a range grounded in your actual numbers. The free portfolio valuation calculator weighs attrition, size, portability, and mix the way buyers do. When you want a second set of eyes on the trend and what it means for structure, request a confidential valuation. For the full valuation picture, start with how residuals are valued.