Currency Exchange Fee Calculator

Where FX costs hide

A provider that converts money makes its return in two places: an explicit transfer fee, and the gap between the wholesale exchange rate and the rate it offers. The fee is printed. The gap is not; it is built into the rate, so it never appears as a line on the confirmation. With the defaults on this page, a market rate of 0.95 against an offered rate of 0.92 is a 3.16% margin, and on a 5,000 transfer that margin costs 150 in the received currency while the visible fee is 20. The benchmark the margin is measured against is the mid-market rate, and central banks publish reference versions of it. The European Central Bank's euro foreign exchange reference rates, for instance, are set by a daily concertation between central banks at around 14:10 CET and published for information purposes, which is exactly the use they have here.

How the spread looks on a statement

It does not. A provider quotes one rate, applies it to the whole amount, and the recipient gets whatever that produces. If the quote is 0.92 and the mid-market rate at the same moment is 0.95, the 0.03 difference is the provider's margin, invisible because it was never itemised. This calculator makes it visible by running the same amount through both rates and reporting the difference as the spread loss, next to the fee.

What the published averages show

The scale of the margin is measured internationally, without naming providers. The United Nations tracks remittance cost as the indicator for its Sustainable Development Goal target 10.c, which aims for costs below 3% by 2030. In the third quarter of 2025 the global average cost of sending a US$200 transfer, fees and margin together, was 6.36%; digital services averaged 4.59%, digital-only operators 3.54%, and non-digital channels 7.3%. Those are averages for small transfers, where a flat fee weighs heavily; on larger amounts the margin in the rate is what dominates, and it is the part this calculator isolates.

Why small spreads add up

Sending 50,000 for a property purchase at a 3% margin costs 1,500. At 0.5% it costs 250, a difference of 1,250 on a single transfer. Regular transfers compound the same way: 2,000 a month at 3% is 720 a year, and at 0.5% it is 120, a gap of 600 a year for the same money arriving in the same place. Over years of transfers, the choice of rate is worth more than most of the small savings people hunt for elsewhere in a budget.

Worked example

Converting 5,000 at a market rate of 0.95 and an offered rate of 0.92, with a 20 fee. At the market rate the amount received would be 5,000 × 0.95 = 4,750. At the offered rate it is 5,000 × 0.92 − 20 = 4,580. The spread loss is 4,750 − 4,600 = 150, the fee is 20, and the total cost is 170, which is 3.58% of the 4,750 the market rate would have delivered; the rate margin alone is 3.16%. One unit point deserves care: the model deducts the fee from the amount received, so it treats the fee as being in the received currency. Where a fee is charged in the sending currency, converting it at the market rate first (20 × 0.95 = 19) keeps the units consistent; at rates near parity the difference is small. A second case: 10,000 at 1.10 against 1.08 with a 10 fee gives a spread loss of 200, a total of 210, 10,790 received, and a cost of 1.91% with a 1.82% margin.

Where the mid-market rate comes from

The mid-market rate is the midpoint between the buy and sell quotes in the wholesale market, the rate at which banks deal with each other. Central bank reference rates are built from it, and financial data services show it moving through the day. Two things matter when using it as the benchmark. The rate has to be from the same moment as the provider's quote, because both move. And a reference rate is a measurement, not something a customer can transact at; every retail rate sits some way from it, and the calculator reports how far.

Volume tiers and special cases

Pricing is not uniform even at one provider. Larger transfers are sometimes quoted at a narrower margin, business accounts are sometimes priced differently from personal ones, and some providers widen their margin at weekends or outside market hours when the wholesale rate is not moving. Corridors between less-traded currencies tend to carry wider margins than the major pairs. The calculator handles one transfer at a time; running two providers' quotes for the same amount on the same day, and comparing the total cost row, is how the difference between them turns into a number.