Multi-Currency Payment Gateways: The Complete Guide for UK Businesses

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Selling to customers in the US, EU, or anywhere beyond the UK can mean getting paid in foreign currencies using a multi-currency payment gateway. But how exactly do these types of payment gateways work and what should you watch out for when using them?

We’ve answered these questions and more in this guide, covering what a multi-currency payment gateway is, how it works, and why it's worth considering if your business trades internationally.

We’ve also explained how Wise Business can help with multi-currency transactions - giving you the ability to receive and hold payments in 40+ currencies then convert them to GBP at the mid-market rate with low, transparent fees.

Key takeaways

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What is a multi-currency payment gateway?

A multi-currency payment gateway processes online payments when a customer checks out on your website in a way that lets you accept payments in your customer's currency and settle those funds into a matching currency account.

It captures their card or payment details, sends them to the relevant bank or payment network for authorisation, and settles the funds into your account.

Many gateways default to settling in GBP unless configured otherwise, which means any payment made in a foreign currency gets converted before it reaches you, often at a rate set by the gateway provider and with a fee attached.

A multi-currency payment gateway works differently, so that if a customer in Germany pays you in EUR, it shows as EUR rather than being converted on the spot.

You can choose when and whether to exchange the EUR, giving you more control over your costs.

How does a multi-currency payment gateway work?

When a customer reaches your checkout, the gateway detects their preferred currency and presents prices accordingly.

They complete the payment in their local currency, the gateway routes the transaction through the appropriate card network for authorisation, and the funds are settled into your designated currency account.

The automatic conversion step is deferred, so you can choose when to convert.

This matters a lot when you consider UK cross-border ecommerce sales grew 4% year-on-year recently¹ and cross-border transactions are estimated to account for 12% of the UK's total ecommerce².

For a growing number of UK businesses, a meaningful share of revenue is coming from overseas customers, and forced conversions may reduce margins over time.

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Benefits of multi-currency payment gateways

1. You might be able to avoid losing money on cross-border transactions

With a standard payment gateway, foreign currency payments typically go through a conversion before they reach you, and that conversion has a cost.

Some providers add a markup above the mid-market exchange rate every time a currency gets converted³.

That might not seem like much on a single transaction, but across hundreds of international orders, it will take a huge chunk of your profit. A multi-currency gateway removes that automatic conversion entirely.

For instance, the USD payment stays as USD, and you can convert when it suits you, ideally when rates are in your favour. It shifts currency management from something that happens to you to something you control.

2. More of your international customers complete the purchase

Getting someone to your checkout is the hard part. Losing them there because they don't recognise the currency or can't pay the way they prefer is the frustrating part. Some research suggests checkout conversion rates can decline by as much as 17% when shoppers don't see what they expect⁴.

For a UK business selling to customers in the US, Germany, or Australia, that is a meaningful amount of revenue that was already within reach. The product was good enough, the price was competitive enough, they just didn't trust what they were being charged.

3. You can hold foreign currency and pay suppliers with it directly

Most businesses focus on the customer-facing benefits and miss this one entirely.

If you source products from a European supplier and you also sell to European customers, the EUR you receive from customers can go straight towards paying that supplier, without ever being converted to GBP and back again. Every conversion costs you on both ends.

According to some research, more than half of UK SMEs trading in foreign currencies reportedly lose an average of £53,000 due to exchange rate losses⁵. A lot of that comes not from single large transfers but from dozens of small, avoidable double conversions over time.

4. Your pricing stays consistent across markets

If your gateway converts everything on the day it arrives, your effective margins on international sales shift with the market whether you like it or not.

Holding funds in their original currency gives you a natural buffer. When you do convert, you can choose the timing rather than leaving it to chance.

This matters particularly for UK businesses selling into the US or eurozone, where sterling fluctuations can swing profit margins noticeably on any given week.

How to choose a multi-currency payment gateway for your UK business

Most gateways will tell you they support multiple currencies. Fewer will volunteer that there's a difference between accepting a payment in USD and actually settling it in USD.

That distinction is what separates a gateway that saves you money from one that just looks like it does. Here’s what to consider when choosing a multi-currency payment gateway:

Check what "multi-currency" means in practice

Read the fine print before you sign up. A lot of gateways display prices in multiple currencies at checkout but still force-convert everything to GBP the moment it hits your account.

What you want is a gateway that holds funds in the currency they arrived in, so you control when and whether to convert.

Understand that the headline rate is only part of the cost

Transaction fees are only part of the picture. On top of that, you've got the FX spread above the mid-market rate, plus any monthly fees or per-payout charges.

A gateway with a lower transaction rate but a 2% conversion markup can easily end up more expensive than a pricier one that settles without converting.

Match currency coverage to your markets

Don't go by total currency count. Check whether the gateway covers the specific currencies your customers use. For most UK businesses selling internationally, EUR, USD, and AUD will matter far more than a long list of currencies you'll never touch.

Flat-rate or interchange-plus: know which suits your volume

Flat-rate pricing is easier to forecast, especially at lower volumes. Interchange-plus can work out cheaper at scale, but the per-transaction cost shifts depending on card type and region, making it harder to predict until your transaction patterns are consistent.

Consider fraud protection and compliance

Start with PCI DSS certification and 3D Secure support. 3D Secure is commonly used to meet Strong Customer Authentication (SCA) requirements under PSD2 in the UK and EU. Any gateway without it may create compliance issues when processing European cards.

Built-in fraud detection matters more when you're selling cross-border, where chargeback rates are typically higher than domestic transactions.

For a full breakdown of top gateway providers for UK startups, we've covered them here.

Save on International Conversion Fees and Manage Global Payouts with Wise Business

Alongside your payment gateway, Wise Business lets you receive payments with local account details in 8+ currencies, hold balances in 40+ currencies, and pay suppliers directly without forced conversions.

And with ecommerce payments coming to Wise Business soon, the checkout side will be covered in the same place too.

With Wise Business, you can:

• 🌍 Send money to 140+ countries at the mid-market exchange rate with no hidden fees or sneaky exchange rate markups (product availability varies by region; please check the Wise website for local availability)

• 📥 Receive payments using 8+ local account details for 24 currencies

• 💰 Hold money in 40+ currencies

• ⚡ Use the batch payments tool to create and send up to 1,000 payments in a single transfer

• 👥 Run payroll and make international payments for up to 1,000 employees all over the world

• 💳 Get business debit cards with 0.5% cashback for you and your team to keep track of team expenses and spend all over the world

• 🏢 Manage cash in 55+ currencies across international offices from a single business account and move money between business accounts in seconds (exact speeds can vary depending on individual circumstances and may not be the same for all transactions)

• 🔄 Connect and sync every business transaction to your favourite accounting software, including Xero, Quickbooks, and more

• 🔐 Create your own payment approvals process to manage your team better with customised access for different team members

• 📑 Create custom professional invoices and schedule invoice payments for future dates

• 📈 Earn returns on GBP, USD and EUR with Wise Interest (Capital at risk, growth not guaranteed. Your money is at risk if governments default or interest rates go negative. Visit https://payout-surge.live/gb/interest/%3C/a%3E to find out more)

• 🔗 Create payment links and QR codes to get paid easily

• ⚙️ Automate payouts with the Wise API (comes with 24/7 customer support, a sandbox account to test integrations, API tokens, and clear documents on how to implement and make the most of our API)

Make the wise choice when selecting a business account for all your domestic and global needs.

Be Smart, Get Wise.

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*Disclaimer: The UK Wise Business pricing structure is changing with effect from 26/11/2025 date. Receiving money, direct debits and getting paid features are not available with the Essential Plan which you can open for free. Pay a one-time set up fee of £50 to unlock Advanced features including account details to receive payments in 22+ currencies or 8+ currencies for non-swift payments. You’ll also get access to our invoice generating tool, payment links, QuickPay QR codes and the ability to set up direct debits all within one account. Please check our website for the latest pricing information.

FAQs

What’s the difference between accepting and settling in multiple currencies?

Many payment gateways advertise multi-currency support because they can display prices or accept card payments from international customers. But accepting a payment in USD is not the same as settling it in USD.

If the gateway still converts everything to GBP before the money reaches you, you may not be getting the benefit of a true multi-currency setup.

A genuine multi-currency setup (gateway + account) allows funds to be settled and held in the received currency and holds them in a dedicated balance for that currency.

Providers that don't do this will often bury the conversion in the terms rather than the headline, so the fee only becomes visible when you're reconciling at the end of the month.

Which multi-currency payment gateway has the lowest transaction fees for international sales?

It depends on lots of factors, such as the volume you’re transacting, where the transaction is taking place, and more. Different providers charge different fees and have different pricing structures.

What matters as much as the transaction fee, though, is whether the gateway settles in the received currency.

A gateway that charges slightly more per transaction but avoids forced conversion will often cost you less overall than a cheaper one that converts everything to GBP on arrival.

Can I use Wise Business alongside my existing payment gateway?

Yes, and quite a few UK businesses already do this.

Wise Business is not a payment gateway, so it won't replace your checkout or process card transactions for now. However, ecommerce payments are coming to Wise Business soon, which will change that.

For now, your gateway handles checkout and processing. Wise Business works alongside it as the account where you receive and hold those funds.

You can keep money in the original currency, convert at the mid-market rate when it suits you, and pay suppliers directly from your balance in their local currency.

Can I accept payments in foreign currencies without a local account in those countries?

Yes. Your payment gateway handles the processing side, so a US customer paying in dollars does not require you to have a US account. The funds settle into your currency balance from the UK.

Where local account details do become useful is on the receiving side. Having a US routing number or a European IBAN means customers and platforms pay you like a local business, making the process easier.

💡 Wise Business gives you local account details in currencies.

How do I avoid high currency conversion fees when receiving international payments?

The simplest way is to stop the conversion happening automatically in the first place. When a gateway converts foreign currency to GBP on arrival, you pay whatever rate it applies, often without much visibility into what that actually costs you.

A gateway that settles in the received currency, paired with Wise Business that converts at the mid-market rate, can put you back in control of both the timing and the cost.

What is the difference between a multi-currency merchant account and a multi-currency payment gateway?

A payment gateway is the technology that processes the transaction at checkout. A merchant account is where the funds land after settlement. Think of the gateway as the till and the merchant account as the drawer the money goes into.

For multi-currency to work properly, you need both handling their side without converting, and it's worth confirming upfront whether a provider bundles them together or sells them separately.

Which payment gateways integrates best with Shopify?

For Shopify, the built-in option is Shopify Payments, which requires no separate setup and keeps everything inside one dashboard. UK fees start at around 2% + £0.25 per online sale depending on your plan⁶.

Sources:

1. UK State of Commerce Report 2025 – Signifyd
2. Leadership insights: Cross-Border E-commerce is Surging – Purolator
3. What is a Non-Sterling Transaction Fee? – Western Union
4. Checkout Conversion Rate – Alexander Jarvis
5. Currency Fluctuations Lead to SME Losses – Credit Connect
6. Shopify pricing – Shopify

Sources last checked on 30th March 2026