When you send money internationally, banks and transfer services rarely charge just the advertised fee. They also add a margin to the exchange rate — the gap between the rate they give you and the real mid-market rate. This hidden cost often exceeds the visible transfer fee, and most people never notice it.
The mid-market rate (also called the interbank rate or spot rate) is the midpoint between the buy and sell price of a currency pair on global foreign exchange markets. It is the "true" exchange rate before anyone adds their margin. You can check it on Google, Reuters, or RemitRoutes. When a provider gives you a different rate, the difference is their FX markup — a hidden fee embedded in the exchange rate rather than listed as a line item.
Banks typically add a 1.5-4% margin to the mid-market exchange rate. On a $1,000 transfer at a 3% markup, that is $30 silently removed from the amount your recipient receives — on top of any visible transfer fee. Banks rarely disclose this margin explicitly. They show you "our exchange rate" without comparing it to the mid-market rate, making it nearly impossible to know what you are actually paying unless you calculate the markup yourself.
To calculate FX markup: (1) Find the current mid-market rate for your currency pair. (2) Compare it to the rate your provider is offering. (3) Divide the difference by the mid-market rate and multiply by 100 to get the percentage markup. For example, if the mid-market rate is 1 USD = 85 INR and your bank offers 82.5 INR, the markup is (85 - 82.5) / 85 x 100 = 2.94%. On a $1,000 transfer, that is $29.40 in hidden fees.
Wise is one of the few traditional providers that consistently uses the mid-market rate with 0% FX markup — their profit comes entirely from the visible transfer fee. Digital asset rails also avoid FX markup because you are buying and selling stablecoins on open exchanges at market price, with only a small exchange spread (typically 0.1-0.5%). Most banks, Western Union, MoneyGram, and PayPal all include significant FX markup in their rates.
The mid-market rate is the midpoint between the buy and sell price of a currency on global foreign exchange markets. It represents the real exchange rate before any provider adds their margin. You can check it on Google, financial news sites, or RemitRoutes.
Most banks add a 1.5-4% margin above the mid-market rate on international transfers. For a $1,000 USD to INR transfer, this could mean $15-40 silently deducted from what your recipient receives, in addition to any visible wire fee.
Wise consistently uses the mid-market rate with 0% FX markup. Digital asset rails also effectively avoid FX markup since you trade stablecoins at market prices with only a small exchange spread. Most other providers — including banks, Western Union, and PayPal — include FX markup in their rates.
Look up the current mid-market rate for your currency pair, then compare it to the rate your provider quotes. Divide the difference by the mid-market rate and multiply by 100. For example: if mid-market is 85 INR per USD and you are offered 82 INR, the markup is (85-82)/85 x 100 = 3.5%.
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