The exchange rate sits at the centre of every international transfer, yet it is widely misunderstood. Knowing how rates are set — and why the one you are offered differs from the headline number — makes you a much smarter sender.
The mid-market rate: the "real" rate
Currencies trade continuously on a global market with a buy price and a sell price. The midpoint between them is the mid-market rate (also called the interbank or real rate). It is the fairest, most neutral reference, and it is the number you see on Google, XE, or in the news. Crucially, it is a benchmark — not usually a rate you can transact at as a consumer. We cover it in depth in the mid-market rate explained.
Why your rate is different: the margin
Money-transfer providers and banks add a margin (or markup) to the mid-market rate. That margin — the gap between the real rate and the rate you are quoted — is how many "no-fee" services actually make their money. It is a genuine cost, just a less visible one than an upfront fee. Two providers can advertise similar rates and still hand your recipient different amounts once the margin and any fee are counted, which is why we always rank by the amount received.
What makes exchange rates move
Rates shift continuously during the trading week. At a high level, the main drivers are:
- Interest rates and central-bank policy — higher relative rates tend to attract capital and can strengthen a currency.
- Inflation — persistently higher inflation tends to weaken a currency's purchasing power over time.
- Trade and capital flows — demand for a country's goods, services, and assets affects demand for its currency.
- Market sentiment and risk — during uncertainty, money often moves toward currencies seen as safe havens.
For everyday senders, the takeaway is not to predict these forces but to understand that the rate is always moving — so a quote is only valid for a moment, and you should confirm before you send.
Should you try to time it?
Waiting for a "better" rate is tempting, but even professionals struggle to time currency markets, and the rate can move against you while you wait. For most personal and family transfers, two habits beat speculation:
- Minimise the controllable costs — pick the provider with the smallest total of margin plus fee.
- Re-compare each time — the best provider changes, so a fresh comparison usually saves more than guessing the market.
If you genuinely need a future certainty (for a large, scheduled payment), some providers offer rate locks or forward arrangements — read the terms carefully, as they can carry their own costs.
The bottom line
The exchange rate is set by global markets (the mid-market rate), and the rate you get is that benchmark minus a provider's margin. You cannot control the market, but you can control how much margin and fee you pay — so compare live rates by the amount received and confirm on the provider's site before sending.
Frequently asked questions
Why is my transfer rate worse than the rate on Google?
Google shows the mid-market (interbank) rate — the midpoint of global buy and sell prices. Providers add a margin to that rate to cover costs and profit, so the rate you are offered is usually a little worse. The size of that margin is a real cost; compare it across providers.
What makes exchange rates move?
At a high level: interest rates, inflation, trade and capital flows, central-bank policy, and market sentiment. Rates move continuously during the trading week, which is why a quote is only good for a moment.
Should I wait for a better rate before sending?
Timing the market is hard even for professionals, and rates can move either way. For most personal transfers it is more reliable to compare providers well and minimise the margin and fees than to try to predict the rate.
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