Interchange optimization is real money wearing a boring name

Nobody gets excited about interchange optimization. It sounds like plumbing, and expensive consultants have given it a bad name by overpromising and underexplaining. So let me explain it the way an operator would, because for B2B platforms in particular, it is some of the most reliable money in payments.

The mechanics, briefly

Interchange is the fee the card networks set and the issuing banks collect on every transaction. The networks publish entire tables of rates, and the rate a transaction qualifies for depends on the data submitted with it. Business and corporate cards carry programs where richer data, the Level 2 and Level 3 fields like tax amounts, invoice numbers, and line items, qualifies the transaction for meaningfully lower rates. Submit poor data and the same transaction downgrades to a more expensive category. Same card, same purchase, different cost, purely based on how the transaction was presented.

Why software platforms are sitting on this

Here is the irony: vertical SaaS platforms already have the enriched data. The invoice, the line items, the tax fields all live in the software. The information the networks will pay to receive is sitting one integration away from the payment. Most platforms never wire it up, because nobody in the building owns the outcome and the processor has limited incentive to volunteer margin back to you.

The second half of the discipline is downgrade management: watching for transactions that fall out of their best qualification because of settlement timing, missing fields, or authorization practices, and fixing the root cause. This is unglamorous, measurable work, and it compounds every month once done.

The operator's rule of thumb

If your platform processes B2B volume and no one has reviewed interchange qualification against your actual transaction data in the last two years, there is very likely money there. Not always life-changing money, but recurring, high-confidence money that funds the more ambitious parts of a payments strategy. Boring name. Real dollars. Start with the data you already have.