The short answer
"Discount rate" is old-school payments terminology that predates modern pricing transparency. Originally it meant the percentage your processor deducted ("discounted") from each batched transaction before depositing — an all-in fee covering interchange, assessments, and processor markup. Today, the term is used loosely: on a flat-rate quote it's the total percentage (2.9%), on an interchange-plus quote it's often just the markup (0.30%), and on a tiered quote it's the "qualified rate" (1.79%) that only some transactions hit.
How discount rate appears on different pricing models
- Flat-rate (Stripe, Square, PayPal): 2.9% + $0.30 is the discount rate. One number, all-in, interchange baked in.
- Interchange-plus: 0.30% + $0.10 is the discount rate (processor markup). Interchange passes through separately on top.
- Tiered / bundled: 1.79% qualified + 2.49% mid-qualified + 3.29% non-qualified. Three discount rates, and most transactions end up on tiers 2 or 3.
- Membership / wholesale: 0.25% + $0.05 discount rate above interchange, plus a monthly membership fee that spreads the processor's cost recovery.
What operators need to know
- "Discount rate" on a quote usually hides more than it shows. A "1.79% discount rate" sounds great until you learn it only applies to qualified regulated-debit transactions — maybe 20% of your mix. Always ask what percentage of your volume will qualify for that rate.
- The number to compare processors on is effective rate, not discount rate. Effective rate = total fees / total volume. Discount rate as advertised is rarely what you end up paying.
- Interchange is NOT the discount rate. Interchange is set by the card networks and goes to the issuing bank. Discount rate (in modern usage) is the processor's markup above interchange. Conflating them is how sales reps sell "0.30% processing" while you're actually paying 2.5%+ all-in.
- Volume-based tiers exist. Most processors quietly offer lower discount rates at $50k, $250k, $1M+/mo volume. Nobody volunteers this — you have to ask. Multi-brand operators consolidating through one acquirer qualify for enterprise tiers that each individual brand couldn't.
- Watch contract language. "Discount rate" in a merchant agreement is sometimes defined narrowly to exclude assessments, per-item fees, and "other fees" — giving the processor room to add line items that don't count against the advertised rate.
When shopping processors, ignore the top-line discount-rate number, ask for three months of interchange-plus statements from a similar merchant, and calculate the all-in effective rate. That's the only comparison that matters. See interchange-plus for why modern transparent pricing uses that structure.