FX Markup
Definition
FX markup is the margin a PSP charges above the interbank exchange rate when converting currencies in cross-border transactions, on top of any stated FX fee.
FX markup is the spread added by a payment service provider, bank, or financial institution above the mid-market exchange rate when converting currencies during international payment settlement. A payment processed in Thai Baht and settled in USD will be converted at a rate that includes an FX markup — often 1–3% above the interbank mid-market rate — that represents additional revenue for the PSP or acquirer. FX markup is often not disclosed as a separate line item, making it one of the most opaque costs in cross-border payments.
FX markup is the hidden cost layer in international payments that receives far less attention than MDR, despite often costing merchants as much or more in total. For any business accepting payments in multiple currencies or settling across borders, understanding FX markup is essential to accurately modeling the total cost of payment acceptance.
How FX Markup Works
The mid-market rate (also called the interbank rate) is the midpoint between the buy and sell rates in the FX market. This is the rate quoted on Google, XE, and Bloomberg — the theoretical “true” rate. No commercial payment provider settles at the mid-market rate.
When a PSP converts your transaction proceeds:
- They apply the mid-market rate as a baseline.
- They add a spread — the FX markup — which is their margin on the conversion.
- The resulting rate is what appears in your settlement report.
A 1.5% FX markup on $1M of annual settlement in a non-base currency costs $15,000 — more than most merchants pay attention to when reviewing their processing costs.
Where FX Markup Hides
FX markup appears in several places in the payment stack:
- Dynamic Currency Conversion (DCC): A particularly egregious version where cardholders are offered (or defaulted into) conversion at the point of sale in their home currency. DCC markups often reach 3–7%.
- PSP settlement: The rate at which the PSP converts transaction currency to settlement currency before depositing funds.
- Multi-currency processing: When a PSP holds funds in transaction currency and converts at settlement, versus converting at authorization time.
Negotiating FX Terms
FX markup is negotiable for high-volume merchants. Specific demands to make:
- Require mid-market rate disclosure: The contract should specify that FX conversion is applied at the mid-market rate plus a disclosed markup (e.g., “+0.5% above mid-market on the settlement date”).
- Seek rate lock: For predictable FX exposure, some PSPs will offer forward rate agreements on settlement currencies.
- Request multi-currency settlement: Settle in the transaction currency where possible and manage FX centrally rather than letting the PSP convert automatically.
FX Markup vs. FX Risk
FX markup is a cost imposed by intermediaries. FX risk is the exposure to rate fluctuations between transaction and settlement dates. Both are relevant costs for international merchants but require different management approaches.