Whether you are paying US tuition, supporting family, buying property or settling a business invoice, the cost of moving pounds to dollars comes down to two things: the exchange-rate margin and any fees. Get those right and the headline rate barely matters.
Step 1: know the mid-market rate
Before you compare providers, check the true mid-market GBP/USD rate on our GBP to USD page. This is your benchmark. Every provider’s offer should be measured as “how far below mid-market is this?” — not against each other’s marketing.
Step 2: compare on total cost, not headline fees
A transfer advertised as “fee-free” can be more expensive than one charging a small fixed fee, because the fee-free option may bury a wider exchange-rate spread. Add the spread and the fee together to get the total cost. As a rule of thumb for GBP/USD:
- Specialist money-transfer services and apps: usually the cheapest, often within ~0.3–1% of mid-market.
- High-street banks: convenient but typically 2–4% all-in, sometimes plus a wire fee.
- Cash bureaux: generally the most expensive; avoid for anything but small amounts.
Step 3: match the method to the amount
For small transfers, a flat fee dominates, so pick low- or no-fee apps. For large transfers, the spread dominates — on £20,000 a 2% difference is $500-plus — so the rate margin is what to optimise, and it is worth getting quotes from two or three providers. Some services offer better rates above certain thresholds or for verified accounts.
Step 4: mind timing and delivery
Exchange rates move continuously, so a quote is a snapshot. For large sums, some people use a limit order (execute automatically if the rate hits a target) or a forward contract (lock today’s rate for a future date) — both offered by specialist firms. Also check delivery speed and whether the recipient’s US bank charges an incoming-wire fee.
Common mistakes
- Judging a provider by its fee alone and ignoring the exchange-rate spread.
- Using a debit/credit card for a large transfer, which can add cash-advance and FX fees.
- Accepting “dynamic currency conversion” (being billed in pounds on a US transaction).
- Leaving a big transfer to the weekend, when rates are stale and some providers pause.
See also mid-market vs bank rates and, for the reverse direction, sending money USA → UK.