The "Honor All Cards" Settlement, Explained: What Merchants Actually Get and What It Costs to Use

For nearly four decades, the "honor all cards" rule has been one of the foundational constraints of card acceptance: if a merchant accepts Visa, they accept every Visa-branded card, regardless of how richly it rewards the cardholder or how much interchange it costs the merchant to settle. The proposed 2026 settlement between Visa, Mastercard, and U.S. merchants is the first credible challenge to that rule in a generation — and the first time merchants would have a meaningful new lever on processing economics.

Coverage has been broadly favorable, but the settlement's practical mechanics are significantly more complicated than the headlines suggest. Here's the operator-level breakdown of what merchants actually get, what it costs to use, and where the meaningful planning work sits.

1. What the settlement actually allows

The proposed settlement, if finalized, gives merchants two new rights that are economically significant:

• Refusing specific high-cost card products. Merchants could decline to accept certain premium-rewards Visa and Mastercard products at the point of sale — the cards whose interchange rates fund the largest cardholder rewards programs. This is product-level, not card-level: a merchant could refuse a category of card without refusing the network as a whole.
• Differential surcharging by card tier. Merchants would gain the ability to apply different surcharges to different tiers of card products from the same network — surcharging premium consumer cards more than standard ones, or adding a surcharge only to the highest-cost tiers while leaving everyday cards unsurcharged.

Both rights come with conditions: surcharging caps tied to the merchant's actual cost of acceptance, signage and disclosure requirements at the point of sale, and ongoing compliance with existing state-level surcharging laws (which already prohibit the practice in several states).

2. The economic upside, in rough terms

For a merchant whose blended effective rate is heavily weighted toward premium consumer cards, the addressable savings are meaningful. Industry analysis of similar pre-settlement scenarios in other jurisdictions (notably the EU's interchange caps) suggests merchants can recover 15–40 basis points of effective rate by selectively refusing the highest-cost product categories, and somewhat more through tier-aware surcharging.

For merchants whose card mix is dominated by debit and standard consumer credit, the realizable upside is small — the cards that cost the most are the ones the settlement gives merchants leverage over, and those cards may not be a meaningful portion of the portfolio in the first place. The math is genuinely portfolio-specific.

3. The operational cost merchants are underestimating

The settlement's newly-allowed actions all happen at the point of sale, in real time, in front of a customer. That implies a stack of changes most merchants haven't planned for:

• Card-product identification at the BIN level. Refusing a specific product or surcharging by tier requires identifying the card's product category from its BIN / Account Range — which the network publishes but most legacy POS systems don't consume in a structured way.
• Customer-facing signage and disclosure. Settlement terms (and most state laws) require pre-purchase disclosure of surcharges and any acceptance restrictions. Operationalizing this for a large retailer touches storefront signage, e-commerce checkout copy, mobile-app flows, and customer-service training.
• Refusal mechanics and customer recovery. Refusing a card mid-transaction is friction the merchant has to absorb — and the cardholder is likely a customer the merchant wants to keep. Most merchants will need a tested fallback: an alternative tender prompt, a clear script for associates, and a way to track what fraction of refused transactions actually convert on a different card.
• Issuer signaling and chargeback risk. A consistent pattern of refusing certain card products may influence issuer authorization decisions or trigger friction-creating issuer-side prompts. The early data here will be interesting; the early data here doesn't exist yet.

4. What merchants should be doing now

The settlement isn't finalized, and the implementation timelines aren't public. But the planning work is meaningful enough — and POS-system change cycles are slow enough — that starting now is reasonable for any merchant with serious card volume.

• Run a card-mix analysis to understand what fraction of your processing volume comes from the card categories the settlement actually affects. The answer determines whether this is a strategic priority or a footnote.
• Audit your POS and gateway capabilities for BIN-level product identification — both whether the data arrives in your authorization response and whether your system can act on it.
• Map your state-level surcharging exposure if you operate in multiple jurisdictions. Settlement-allowed actions may still be prohibited by state law in your largest markets.
• Decide your customer-experience posture before the operational rollout — whether you'd rather surcharge silently across all premium cards (less friction, less savings) or refuse selectively (more friction, more savings).

5. The bigger picture

The settlement, if finalized, is the most significant merchant-side change to U.S. card-acceptance economics in a generation. But it isn't a windfall — it's a new lever that requires meaningful operational investment to use, and the savings it unlocks are concentrated in specific portfolios. For many merchants, the realistic answer will be to wait for the first wave of large-retailer rollouts to surface the customer- experience playbook, then follow with a tested approach.

For merchants whose volume is heavily weighted toward the cards the settlement targets, the calculus is different — and starting the planning work now is reasonable.

How Superior Payments helps

Superior AI runs card-mix analysis on a sample of your statements and quantifies the realistic addressable savings under each settlement-enabled posture. For merchants ready to plan the operational rollout, our integrations team can map BIN-level product identification across your existing gateway, POS, and e-commerce stack, and surface the gaps that would block a clean implementation.