Exchange Rate Spreads -- Mid-Market vs What You Pay

Exchange Rate Spreads — Mid-Market vs What You Pay

When you look up a currency exchange rate on Google or Reuters, you see the mid-market rate — the midpoint between the price banks buy and sell a currency for in wholesale markets. When you actually exchange money, you almost always get a worse rate. The difference is the spread, and it is how banks, brokers, and exchange bureaux profit on every transaction.

Mid-market vs retail rate

Provider type	Typical spread over mid-market
Large bank, branch	2–5%
Airport or hotel kiosk	5–15%
Credit card (overseas spend)	0.5–3% + possible foreign transaction fee
Specialist FX service (Wise, Revolut)	0.3–2%
Interbank (wholesale)	~0.01% or less

Why your bank rate is "worse" than Google's

Google shows indicative mid-market quotes. Banks buy foreign currency at a rate lower than mid-market and sell at a rate higher than mid-market. The gap between their buy price and sell price is the spread — their gross revenue on the transaction. They may also charge a flat service fee on top.

Worked example: Mid-market USD/EUR = 0.920.
Bank's buy rate: 0.900 | Bank's sell rate: 0.940
If you buy €1,000, you pay $1,000 / 0.900 = $1,111 instead of $1,087 at mid-market — a hidden cost of $24 (2.2%).

How to compare providers fairly

1. Note the mid-market rate at the moment of the transaction (from a neutral source)
2. Divide the amount you receive by the amount you send — this is your effective rate
3. Compare to mid-market: the percentage difference is your true cost
4. Add any flat fees to calculate the total

Example: Sending $1,000 to receive GBP. Mid-market = $1.27/£. You receive £770.
Effective rate = $1,000 / £770 = $1.299/£ → real cost ≈ 2.3% above mid-market.

What affects the spread

• Amount: Larger transfers get better rates — percentage overhead decreases at scale
• Currency pair: EUR/USD, GBP/USD (major pairs) have tighter spreads than exotic pairs like USD/PKR or EUR/NGN
• Channel: Online bank transfer is cheaper than branch or airport kiosk
• Market volatility: Providers widen spreads during turbulent markets to hedge their own risk
• Time of day: FX markets are less liquid outside business hours for each currency zone

Tips to minimise costs

• Use a specialist online FX service for large transfers — their spreads are typically much smaller than retail banks
• Avoid airport and hotel exchange kiosks for anything more than emergency cash
• If your credit card has no foreign transaction fee, it often beats a kiosk rate even after Visa/Mastercard's wholesale spread
• Lock in a rate with a forward contract if you need to exchange a known amount in the future

Compliance note

Never rely on a free web rate for tax, legal, or audit filings unless your authority explicitly accepts that source and timestamp. HMRC, IRS, ATO, and similar bodies each specify approved exchange rate sources for official conversion.

Use the Currency Converter for indicative relative comparisons, then obtain a firm quote from your FX provider for actual transactions.