The short answer
A buy rate is the wholesale cost an ISO charges its agents or sub ISOs for payment processing. Everything the agent prices above the buy rate becomes residual margin, usually shared on a split. An inflated buy rate transfers margin to the ISO before any advertised split is ever calculated.
The Buy Rate Defined
A buy rate is the wholesale rate an ISO or processor charges its sales partners, above which all merchant pricing becomes the partner's gross residual margin. Think of it as the dealer invoice price of processing. The ISO's true cost is interchange plus network fees plus a small processor charge. The buy rate sits somewhere above that true cost, and the distance between the two is the ISO's guaranteed take on every transaction, collected before any split is discussed.
Buy rates appear in agent agreements in two forms: a schedule of fixed rates per card type, or an interchange plus figure stating the markup over published wholesale cost. The second form is the honest one, because it can be checked against the card networks' published interchange tables.
How Margin Above the Buy Rate Becomes Residual
Suppose a buy rate of interchange plus 10 basis points, and a merchant priced at interchange plus 40. The 30 basis point difference is the agent's gross margin. On a $30,000 per month merchant that is $90, split with the ISO per the agreement. At a 70/30 split the agent keeps $63 per month from that one account. Multiply by a portfolio and the buy rate becomes the single most important number in the agent's business, more important than the headline split.
The same arithmetic governs pricing power. An agent working above a low buy rate can undercut a competitor and still earn margin. An agent working above a high one is priced out of competitive deals before the first meeting. Buy rates do not just divide the profit, they decide which merchants can be won at all.
How an Inflated Buy Rate Guts a 70/30 Split
Here is the quiet version of the trick. True cost is interchange plus roughly 5 basis points. The ISO sets the agent's buy rate at interchange plus 25 and advertises a 70 percent split. The merchant is priced at interchange plus 50. On $30,000 of monthly volume the total markup above true cost is about $135. The agent sees only the 25 basis points above the buy rate, about $75, and keeps 70 percent of it: $52.50. The ISO keeps its $22.50 share plus the hidden $60 buried in the buy rate. The real split is roughly 39 percent to the agent, sold as 70. Scaled across a 100 account portfolio, the difference is roughly $3,000 a month flowing to the wrong side of the table.
What to Ask Before Signing
Three questions expose a program's economics. What is the buy rate relative to interchange and dues, in writing. Does the split apply to true margin or to margin above an inflated floor. And do residuals vest for the life of the account regardless of production. Programs confident in their pricing answer all three in the agreement itself. The Batch Group Sub ISO Program publishes aggressive buy rates and pays lifetime residuals vested from day one, with no clawbacks.
Commonly Asked Questions
- What is a good buy rate in merchant services?
- The best programs set buy rates within a few basis points of true cost, meaning interchange plus network dues plus a small processor fee. The further the buy rate sits above true cost, the more margin the ISO takes before the split.
- Is a higher split always better than a lower buy rate?
- No. A 70 percent split above an inflated buy rate can pay less than a 50 percent split of true margin. The buy rate and the split must be evaluated together.
- Do buy rates apply to sub ISOs as well as agents?
- Yes. Sub ISOs typically receive wholesale buy rates closer to true cost than agent pricing, which is a large part of the tier's economic advantage.
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