How to Pay International Suppliers: A Complete Guide for 2026

Cross-border B2B payments are projected to exceed $35 trillion by 2028, according to Juniper Research. Yet most businesses still overpay on every international supplier invoice — often without realizing it.

The problem comes down to three hidden cost layers:

1. Exchange rate markup — Banks typically add 1.5–3% above the mid-market rate. On a $50,000 supplier payment, that's $750–$1,500 lost per transaction.
2. Wire transfer fees — SWIFT transfers cost $25–$50 per payment, plus intermediary bank fees of $15–$30 that get deducted from the payment amount.
3. Correspondent bank charges — International wires pass through intermediary banks, each taking a cut. Your supplier may receive less than you sent, creating reconciliation headaches.

According to the Bank for International Settlements (BIS), the average cost of cross-border B2B payments remains above 1.5% — far higher than domestic equivalents. Our guide to exchange rate markups explains exactly how to calculate these hidden costs.

Not all payment methods are equal when it comes to cost, speed, and convenience:

Bank Wire Transfer (SWIFT)

The traditional method. Reliable but expensive — expect $25–$50 per transfer plus 1.5–3% FX markup. Transfers take 2–5 business days. Best for one-off large payments where your bank already has a relationship.

Specialist FX Platforms

Services like Wise Business, OFX, and XE Business offer significantly lower costs — typically 0–0.7% total cost versus 2–4% at banks. They also provide batch payment tools, API integrations, and multi-currency accounts.

B2B AP Automation Platforms

Platforms like BILL (formerly Bill.com) combine AP automation with payment processing. They handle invoice capture, approval workflows, and payment execution in one place — ideal for businesses managing dozens of supplier invoices monthly. According to BILL, their platform reduced manual payables processing from 30 hours to 5 hours per week for some customers.

Letters of Credit

Used in international trade where buyer and seller don't have an established relationship. The buyer's bank guarantees payment upon proof of shipment. Expensive (1–3% of the transaction) but provides security for both parties.

Wise Business

Best for SMBs making regular international payments. Offers the mid-market exchange rate with 0% markup, batch payments via CSV upload, and integrations with Xero, QuickBooks, and FreeAgent. API access lets you automate payments from your ERP. Volume-based fee discounts available for businesses sending over $100K/month.

OFX Business

Best for large supplier payments ($10,000+). No transfer fees, dedicated FX dealers who can negotiate rates, and forward contracts to lock exchange rates up to 12 months. Particularly strong for manufacturing and import businesses with predictable payment schedules.

XE Business

Trusted by 17,000+ businesses, moving $17B+ annually. Offers multi-currency accounts in 145+ currencies, forward contracts, limit orders, and ERP connectivity with Microsoft Dynamics 365 and Sage Intacct. U.S. state licensed and FinCEN registered.

Revolut Business

Best for tech-forward businesses and startups. Multi-currency accounts, team expense cards, and competitive FX rates. Free plan available for small businesses. Strong API and accounting integrations.

For a detailed provider-by-provider comparison, see our business money transfer provider review.

Businesses that switch from bank wires to specialist platforms typically save 60–80% on international payment costs. Here's how to maximize savings:

1. Consolidate payments — Batch multiple supplier invoices into fewer, larger transfers. This reduces per-transaction fees and may qualify you for volume discounts.
2. Use multi-currency accounts — If you receive revenue in the same currency as your supplier, pay them directly from that balance without converting twice. Our multi-currency account guide explains how.
3. Negotiate payment terms in your currency — Ask suppliers to invoice in your home currency. This shifts the FX risk to them, though they may price it in.
4. Lock rates with forward contracts — If you have predictable supplier costs, lock the exchange rate today for payments due in 30, 60, or 90 days. OFX and XE offer this. Learn more in our FX hedging guide.
5. Automate with APIs — Connect your accounting software to a payment platform to eliminate manual data entry and reduce errors.
6. Compare rates at your exact amount — Use our comparison tool to check which provider offers the best rate for your specific transfer amount and corridor.

International supplier payments come with compliance obligations that personal transfers don't:

• Invoice matching — Keep a clear paper trail linking each payment to a specific invoice or purchase order. Tax authorities may ask for proof that payments were for legitimate business expenses.
• Transfer pricing documentation — If paying a related entity abroad (e.g., a subsidiary), ensure amounts align with arm's-length pricing rules per OECD guidelines to avoid IRS or HMRC scrutiny.
• Withholding tax — Some countries require you to withhold tax on payments to foreign suppliers for services. Check if a tax treaty applies to reduce or eliminate it.
• Sanctions screening — Ensure your suppliers aren't on restricted party lists. Most FX platforms handle this automatically, but you're ultimately responsible.
• CTR reporting — In the US, transactions over $10,000 trigger a Currency Transaction Report per FinCEN requirements.

For more on regulatory requirements, see our money transfer safety guide.

Data in this article is based on real quotes collected from provider APIs and websites via automated scraping every 6 hours. Exchange rates and fees change frequently — use our comparison tool for the latest rates.

External sources include the Bank for International Settlements, Juniper Research, provider-published fee schedules, and regulatory filings with the FCA and FinCEN.