FX margin vs Mid-market rate: what is the difference?
The mid-market rate is the benchmark: the midpoint between buy and sell prices in the wholesale market. The FX margin is how far a provider's rate sits from that benchmark, as a percentage.
| FX margin | Mid-market rate | |
|---|---|---|
| In one line | FX margin is the difference between the exchange rate a provider gives a customer and a reference rate, such as the interbank or mid-market rate, expressed as a percentage. In remittances it is a cost on top of the visible transfer fee. | The mid-market rate is the midpoint between the buy (bid) and sell (offer) prices for a currency pair in the wholesale market at a given moment. It is the usual benchmark for measuring how much margin a provider adds to an exchange rate. |
| Read more | FX margin | Mid-market rate |
How they work together
The World Bank measures remittance cost as the fee plus the FX margin, so both matter when comparing providers.
Where Polynopsis fits
Polynopsis shows balances in every currency across banks, partners and exchanges, so the effect of each conversion on every corridor is visible.
Polynopsis shows balances in every currency across banks, partners and exchanges in one position, so the team can see each currency's exposure at a glance.
Frequently asked questions
What is the difference between fx margin and mid-market rate?
The mid-market rate is the benchmark: the midpoint between buy and sell prices in the wholesale market. The FX margin is how far a provider's rate sits from that benchmark, as a percentage.
What is FX margin?
FX margin is the difference between the exchange rate a provider gives a customer and a reference rate, such as the interbank or mid-market rate, expressed as a percentage. In remittances it is a cost on top of the visible transfer fee.
What is Mid-market rate?
The mid-market rate is the midpoint between the buy (bid) and sell (offer) prices for a currency pair in the wholesale market at a given moment. It is the usual benchmark for measuring how much margin a provider adds to an exchange rate.
Sources
- Remittance Prices Worldwide methodology · World Bank
- Remittance Prices Worldwide, Issue 54, September 2025 · World Bank
- Remitly Global, Inc. Form 10-K for fiscal year 2025 · U.S. Securities and Exchange Commission (EDGAR)
- The Western Union Company Form 10-K for fiscal year 2025 · U.S. Securities and Exchange Commission (EDGAR)
- Regulation (EU) 2021/1230 on cross-border payments in the Union · EUR-Lex, Publications Office of the European Union
- 12 CFR 1005.31, Disclosures (Regulation E, remittance transfers) · Electronic Code of Federal Regulations
- Euro foreign exchange reference rates · European Central Bank
- WMR FX Benchmarks Spot, Forward, NDF and Metals Rates methodology, v30 (January 2026) · LSEG / FTSE Russell
- WMR FX Benchmark Statement · LSEG / FTSE Russell
- Foreign Exchange Rates, H.10: about the release · Board of Governors of the Federal Reserve System
Know where all your money is.
Polynopsis gives cross-border payment teams one live position across every bank, payout partner, exchange and wallet, including money in flight, and warns before a corridor runs dry.
About Polynopsis
Polynopsis is liquidity management software for cross-border payment companies. The name joins poly, many, and synopsis, a seeing together: one live view of money spread across many banks, payout partners, exchanges and stablecoin wallets, including money in flight, with a warning before any corridor runs dry.
Why it is called Polynopsis · About Polynopsis · Glossary · Corridor runway calculator