You send £500. Your mother receives the naira equivalent of about £470. Nobody stole anything, no one made a mistake, and the app told you the transfer was "fee free".
This is the most common experience in diaspora finance, and the most misunderstood. The money did not disappear. It leaked, in four places, and only one of them was labelled.
1. The exchange rate margin
This is the big one, and it is almost never called a fee.
There is a real exchange rate — the mid-market rate, the midpoint between what buyers and sellers are offering at that moment. It is the rate you see on Google. Almost nobody gives it to you.
Instead, a provider quotes a rate slightly worse than the real one and keeps the difference. If the mid-market rate is 1,950 and you are offered 1,890, that gap of roughly 3% is revenue. On £500 that is about £15 — invisible, because it arrives as a rate rather than a charge.
A "zero fee" transfer with a 3% rate margin costs more than a £3 transfer at the real rate.
The test is simple: look up the mid-market rate, then compare it with the rate you are being offered. The difference, as a percentage, is what the transfer actually costs you.
2. The transfer fee
The honest one. It is disclosed, it appears on your receipt, and it is usually the smallest number in this list — which is precisely why it gets advertised.
3. The receiving side
Money does not simply appear in an account abroad. It passes through a receiving institution, and that institution may take its own cut: a deposit charge, a cash-collection fee, a mobile money cash-out fee, or a lower rate again if a second conversion happens locally.
This cost is often invisible to the sender. You see £500 leave. Your family sees what arrives. The gap between those two numbers is the part worth asking about, because it is the only number that matters to the person receiving it.
4. Timing
Rates move. If a transfer is quoted on Monday and settles on Wednesday, you may be exposed to two days of currency movement — which can go either way. For a one-off transfer this is noise. For someone sending money every month, it compounds into a real number.
What this adds up to
Here is the same £500 under two structures:
| Advertised | What it costs | |
|---|---|---|
| "Fee free", 3% rate margin | £0 fee | about £15 |
| £3.50 fee, real rate | £3.50 fee | £3.50 |
| 1.5% margin + £2 fee | £2 fee | about £9.50 |
The cheapest-looking option is the most expensive one. That is not an accident — it is a marketing decision, and it works because exchange rates are harder to compare than fees.
Four questions worth asking
- What is the mid-market rate right now, and what rate am I being offered? The difference is the real cost.
- What will actually land in their account? Ask for the receive amount, not the send amount.
- Does the receiving institution charge anything? Ask the person at the other end.
- If I send this every month, what does the margin cost me a year? Multiply by twelve. The number is usually larger than people expect.
Why we are building for this
Shuttlevest exists partly because this comparison is unreasonably hard to make. People sending money home are doing something generous and often urgent, and they are asked to become currency analysts to avoid being quietly overcharged.
Our view is straightforward: show the real rate, show the margin as a number, show what will land at the other end, and let people decide. When our cross-border features arrive they will be delivered with regulated partners who are licensed to move money — and the pricing will be shown in full before anyone confirms anything.
That part is not live yet. The maths above is, and it is worth doing before your next transfer.