Last Updated: April 21, 2026
In a rush? Use this rule on every foreign checkout: pay in local currency, not GBP. If you need Starling setup, use code YGLRU91 to claim the £25 referral offer: Open Starling here.
Most people lose money on international payments without realising it. The issue is not always an obvious fee. It is often a weaker exchange rate chosen by the retailer or payment provider. This guide shows how Starling users can reduce hidden FX leakage in a practical, repeatable way.
Quick verdict
- Best action: Always choose local/native currency at checkout.
- Why: Retailer-side GBP conversion often includes hidden markup.
- Result: Better exchange outcomes over time on travel and online spend.
Where hidden FX fees actually come from
Many checkouts ask: “Pay in GBP or local currency?” If you choose GBP, the retailer or payment provider usually controls the exchange rate. They may say there is “no fee”, but they can still profit through the spread in that rate.
That spread can be meaningful. In many cases it is around 1%, and it can be significantly higher depending on merchant, provider, and route. On frequent travel or repeated international purchases, this adds up quickly.
How to use Starling correctly for foreign spending
- When asked at checkout, choose the local currency.
- Do not accept retailer conversion to GBP unless you have compared rates and it is genuinely better.
- Keep a simple note of converted totals for 2-3 test purchases.
- Compare with prior GBP-converted purchases to see real difference.
PayPal and provider conversion traps
PayPal-style flows can show “no fee” while still offering a weaker conversion rate if you let the provider convert. The same principle applies: where possible, use card-issuer conversion path and avoid provider/retailer conversion unless you have explicitly validated the rate.
Quick action: On your next overseas purchase, switch to local-currency checkout and screenshot the final GBP charge for comparison.
Who this matters most for
- Frequent travellers using card payments abroad.
- Online shoppers buying from non-UK stores.
- Freelancers and small businesses paying foreign invoices.
- Anyone using PayPal or marketplace checkouts in mixed currencies.
Dynamic Currency Conversion: the simple rule
Dynamic Currency Conversion is the checkout choice where a retailer offers to convert your purchase into GBP. It feels helpful because the price is familiar, but it often means accepting the retailer or payment provider’s exchange rate instead of your card issuer’s route. With Starling, the practical habit is to choose the local currency and let the card conversion process do the work.
Real-world examples to watch for
- A card terminal abroad asking “Pay in GBP?”
- A hotel, car hire desk or airport shop presenting a converted sterling total.
- PayPal-style checkout pages defaulting to provider conversion.
- International websites offering a UK-looking price that is not the merchant’s native currency.
Starling FX checklist
- Choose local currency at the terminal or online checkout.
- Decline merchant conversion to GBP unless you have checked the rate.
- Take screenshots for larger purchases so you can compare the final charge.
- Use the same rule with PayPal and marketplace purchases where card conversion is available.
FAQ: avoiding hidden FX fees
Is this only a Starling issue?
No. The same checkout behaviour matters with many cards. Starling is useful because it gives a clean, app-first way to manage spending, but the currency choice still matters.
Can hidden FX markup really be more expensive than a visible fee?
Yes. A visible fee is easy to spot, but a poor exchange rate can be less obvious. For frequent travellers or repeated online purchases, small percentage differences can add up.
Final take: avoiding hidden FX costs is mostly a behaviour problem, not a bank-switch problem. If you consistently choose local currency and avoid retailer conversion, your long-term cost per international payment usually improves.
Start here: Open Starling with code YGLRU91 and claim the £25 referral offer – Claim the referral offer.
I’m Steven, founder of MoneyAppReviews. I test money apps, referral programs, and EV tools in real life before I write about them. I drive a 2021 Tesla Model 3 Long Range, use Octopus Intelligent Go for home charging, and regularly track costs, savings, and app performance over time. I focus on practical, evidence-based reviews that help people decide what is actually worth using, not just what pays the highest commission.