# Per-transaction fee

https://www.uniwebpay.com/glossary/per-transaction-fee/

*Last updated: 2026-08-03*

A fixed amount charged on each transaction regardless of its size, usually quoted alongside a percentage. Its weight depends entirely on the average ticket: negligible on a large sale, and frequently the majority of what a merchant pays on a small one. It is the number a small-basket merchant should focus on, and the one a headline percentage hides.

## Why it matters to a merchant

The component that decides everything for a small basket and almost nothing for a large one. At a two-dollar average sale a fixed fee can exceed the percentage entirely, which is why the right provider for a convenience store and the right provider for a jeweller are frequently not the same company.

## Related terms

*What it costs, and what gets measured*

- [MDR (merchant discount rate)](https://www.uniwebpay.com/glossary/mdr/)
- [Interchange](https://www.uniwebpay.com/glossary/interchange/)
- [GMV (gross merchandise value)](https://www.uniwebpay.com/glossary/gmv/)
- [Merchant account](https://www.uniwebpay.com/glossary/merchant-account/)
- [Effective rate](https://www.uniwebpay.com/glossary/effective-rate/)
- [Blended rate](https://www.uniwebpay.com/glossary/blended-rate/)
- [Interchange-plus](https://www.uniwebpay.com/glossary/interchange-plus/)
- [Cross-border interchange](https://www.uniwebpay.com/glossary/cross-border-interchange/)
- [Net settlement](https://www.uniwebpay.com/glossary/net-settlement/)
- [Rolling reserve](https://www.uniwebpay.com/glossary/rolling-reserve/)
- [Surcharge](https://www.uniwebpay.com/glossary/surcharge/)

- [All 74 terms](https://www.uniwebpay.com/glossary/)

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