The short answer
A downgrade happens when a transaction fails to qualify for the cheapest interchange category it was eligible for. Common causes are missing address data on keyed transactions, batches left open too long, missing customer codes on commercial cards, and manual entry where a card could have been tapped. Each downgrade costs 0.30% to 1.00% extra.
Diagnosing them
On interchange-plus pricing, downgrades appear as named interchange categories you can look up. On tiered pricing they hide inside 'mid-qualified' and 'non-qualified' buckets, which is one reason tiered pricing persists.
The usual fixes
Enable AVS and require ZIP or postal code on keyed transactions. Set automatic daily batch close. Pass customer and tax codes on commercial cards. Encourage tap over key-entry. None of these cost anything.
What good looks like
Under 10% of transactions downgrading is healthy for card-present retail. Above 25%, something is misconfigured and a competent review will pay for itself in the first month.
Key takeaways
- Downgrades are usually configuration, not pricing
- Tiered pricing exists partly to hide them
- AVS, batch timing and commercial card data are the three big fixes
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