TL;DR — Cheapest Way to Process International Ecommerce Payments (2026)
Cross-border ecommerce sellers face two layers of fees: payment processing (accepting the customer’s money) and currency conversion (turning foreign revenue into your home currency). Airwallex offers the lowest combined cost by handling both layers — 1.5% + local processing fee for card payments, mid-market FX for conversion. Stripe charges 2.9% + USD 0.30 for processing plus 1% for currency conversion on cross-border payouts. PayPal charges 4.4% + fixed fee for international transactions with an additional 3–4% FX margin — the most expensive mainstream option. Shopify Payments sits in the middle: competitive processing rates but a 1.5% currency conversion fee on multi-currency payouts.
The Two-Layer Cost of Selling Internationally
Every international ecommerce transaction incurs costs that domestic sellers never see:
Layer 1: Payment processing. The fee charged to accept the customer’s card, digital wallet, or local payment method. This runs 1.5–4.4% depending on your provider, the customer’s country, and the payment method.
Layer 2: Currency conversion. The cost of turning USD, EUR, or GBP revenue into AUD (or whichever currency you operate in). This runs 0.3–4% depending on whether your provider uses mid-market rates or applies a hidden margin.
A Melbourne-based Shopify store selling to US customers might pay: 2.9% + USD 0.30 to Shopify Payments for card processing, plus 1.5% to convert USD settlements to AUD. Total: roughly 4.4% per transaction. On USD 100,000 in annual revenue, that is USD 4,400 in payment costs — before any chargebacks or refunds.
By routing USD settlements to a multi-currency account instead of auto-converting, the same store can eliminate the 1.5% conversion fee and pay only the card processing cost plus ~0.3% to convert at mid-market when ready. Annual savings: roughly USD 1,200 per USD 100,000 in revenue.
Cross-Border Payment Processors Compared
| Provider | Card Processing | Currency Conversion | Multi-Currency Settlement | Local Payment Methods | Total Cost (USD 100 sale, AUD payout) |
|---|---|---|---|---|---|
| Airwallex | 1.5% + AUD 0.30 (AU cards); 2.8% + AUD 0.30 (international cards) | Mid-market (~0.3% markup) | Yes — hold in transaction currency | Yes — WeChat Pay, Alipay, GrabPay, etc. | ~AUD 4.48 (2.8%) |
| Stripe | 2.9% + USD 0.30 (US cards) | ~2% above mid-market (auto-convert) or 1% fee on multi-currency payout | Available (Stripe multi-currency) | Yes — 100+ methods | ~AUD 4.93–6.51 (3.1–4.1%) |
| Shopify Payments | 2.4–2.9% + USD 0.30 (varies by plan) | 1.5% on multi-currency settlement conversion | Yes (Shopify Markets) | Yes — Shop Pay, Apple Pay | ~AUD 5.57–6.20 (3.5–3.9%) |
| PayPal | 4.4% + fixed fee (international) | 3–4% above mid-market | Not true multi-currency — auto-converted | Yes — PayPal wallet | ~AUD 9.47–13.31 (6.0–8.4%) |
| Wise Business | No native card processing — use with Stripe | Mid-market + ~0.43% | Yes — hold 50+ currencies | Not applicable (not a payment gateway) | ~AUD 4.93 (3.1%) with Stripe |
Costs calculated on a USD 100 transaction from a US customer to an Australian seller, using mid-market rate of USD 1 = AUD 1.5625 as of May 2026. Processing fees exclude chargebacks, refunds, and subscription plan costs.
1. Airwallex — The Integrated Ecommerce Solution
Airwallex is the only provider on this list offering both payment acceptance and multi-currency settlement in one platform. The payment gateway (Airwallex Payments) processes cards at 1.5% + AUD 0.30 for domestic Australian cards and 2.8% + AUD 0.30 for international cards — competitive with Stripe’s standard rates. The difference: settlements land in your Airwallex multi-currency wallet without forced conversion.
A store selling in USD, EUR, and GBP can connect each currency’s settlement to the corresponding Airwallex wallet. USD payments land in the USD wallet (free), EUR in the EUR wallet (free), GBP in the GBP wallet (free). Conversion to AUD happens when you initiate it, at mid-market rates with ~0.3% markup. You never pay a 1–2% auto-conversion fee because the money never auto-converts.
Airwallex also supports local payment methods that matter for specific markets: WeChat Pay and Alipay for Chinese customers, GrabPay for Southeast Asia, and local European payment methods via integration partners. For an Australian ecommerce brand targeting Asia-Pacific customers, these local methods can improve checkout conversion rates by 15–30% compared to card-only checkout.
2. Stripe — Best Developer Experience, Higher Conversion Cost
Stripe’s card processing fee is 2.9% + USD 0.30 for US cards (3.4% + USD 0.30 for international cards charged to Australian accounts). By default, Stripe auto-converts foreign currency settlements to AUD at approximately 2% above mid-market — adding roughly 2% to the effective transaction cost.
The fix: enable Stripe’s multi-currency payout feature. This routes USD settlements to a connected US bank account (your Airwallex or Wise USD account) instead of auto-converting. The feature costs 1% of the settlement amount or a flat fee depending on your Stripe region. For an Australian Stripe account, multi-currency payout to a US bank account costs 1%.
The Stripe + Airwallex combination: Stripe processes the card payment at 2.9% + USD 0.30, routes the net USD to your Airwallex US account (1% payout fee), and you convert to AUD at Airwallex’s mid-market rate (~0.3%). Total effective cost: roughly 4.2%. Without the multi-currency setup, Stripe auto-converts at ~2% above mid-market for a total of roughly 4.9%.
Stripe’s advantage is the developer tooling. The API, documentation, and integrations (Shopify, WooCommerce, BigCommerce, custom checkout) are the best in the market. If you need a custom checkout flow or complex subscription logic, Stripe is the practical choice — pair it with Airwallex or Wise for the currency conversion leg.
3. Shopify Payments — Simplest for Shopify Stores, Pricier Than It Looks
Shopify Payments (powered by Stripe) charges 2.4–2.9% + USD 0.30 depending on your Shopify plan. For a Basic Shopify plan (USD 39/month), the rate is 2.9%. The Shopify Plus plan (USD 2,300/month) drops to 2.4%.
Shopify Markets, the multi-currency selling feature, adds a 1.5% currency conversion fee on payouts settled in a currency different from your store’s default. If your store prices in USD but your payout currency is AUD, you pay the card processing fee plus 1.5% conversion. If you enable multi-currency payouts and connect an external USD account, you avoid the 1.5% but need the higher-tier Shopify plan or Shopify Payments Pro to access this feature.
For Shopify stores doing USD 100,000+/year in international sales, the maths favour opening an Airwallex US account and routing USD payouts there — even if it requires a Shopify plan upgrade or third-party payment gateway. The 1.5% conversion fee on USD 100,000 in sales is USD 1,500/year, more than the cost difference between Shopify plans.
4. PayPal — The Most Expensive Processing, but Some Customers Demand It
PayPal charges 4.4% + a fixed fee (varies by country) for international commercial transactions. On top of the processing fee, PayPal applies a 3–4% margin above the mid-market rate when converting currency for withdrawal. A USD 100 payment from a US customer to an Australian PayPal account costs roughly USD 6.00–8.40 in total fees — far above any other option.
PayPal’s one advantage: some customers insist on paying via PayPal. The PayPal wallet has 400+ million active accounts, and for certain demographics (older US consumers, European buyers unfamiliar with the merchant), PayPal checkout is a trust signal. The practical approach: offer PayPal as a secondary checkout option but price your products to absorb the higher fee, or use PayPal only for markets where local payment methods are not supported by your primary processor.
PayPal does not offer true multi-currency settlement. USD payments to an Australian account are auto-converted at PayPal’s rate when you withdraw — you cannot hold USD in PayPal and convert later at a better rate.
How to Set Up the Cheapest Cross-Border Payment Stack
The optimal payment stack for an Australian ecommerce brand selling internationally:
- Payment gateway: Airwallex Payments (or Stripe if you need specific integrations). Card processing at 1.5–2.9% depending on card origin.
- Multi-currency settlement: Route foreign currency settlements to Airwallex multi-currency wallets. USD to US account, EUR to EU IBAN, GBP to UK sort code. Cost: USD 0 receiving fee.
- Currency conversion: Convert when the rate is favourable — mid-market + ~0.3% via Airwallex.
- Local payment methods: Enable WeChat Pay and Alipay via Airwallex if selling into China. Enable European local methods (iDEAL, SEPA Direct Debit, Bancontact) via Stripe if selling into Europe.
Total effective cost: roughly 1.5–3.1% depending on the customer’s card origin and your processing volume. Compared to the default PayPal setup at 6–8%, the savings are 3–5 percentage points per transaction — USD 3,000–5,000 per USD 100,000 in revenue.
Frequently Asked Questions
Can I use Airwallex payments on Shopify?
Airwallex is not a native Shopify Payments provider, but it can be added as a third-party payment gateway on Shopify. Shopify charges an additional 0.5–2.0% transaction fee for third-party gateways (plan-dependent), which reduces the cost advantage. For Shopify stores, the Stripe + Airwallex multi-currency payout combination often works better than Airwallex as a gateway due to Shopify’s additional fees.
What about WooCommerce and other platforms?
Airwallex offers plugins for WooCommerce, Magento, and PrestaShop with direct integration. Stripe’s WooCommerce plugin is more mature and supports more local payment methods. For WooCommerce stores, Stripe as the gateway with Airwallex or Wise for settlement conversion is the most reliable combination.
Do I need to charge customers in their local currency?
Not necessarily, but it improves conversion rates. A US customer seeing prices in AUD is less likely to complete checkout than one seeing prices in USD. Most ecommerce platforms (Shopify Markets, WooCommerce multi-currency plugins) support displaying prices in the customer’s local currency while settling to the merchant in a base currency. The customer’s card issuer handles the final conversion, so the merchant does not pay additional fees for displaying local currency.
How do I handle refunds in multiple currencies?
Refunds go back through the original payment method. If the original payment was in USD via Stripe, the refund is processed in USD. If you have already converted the USD to AUD in Airwallex, you need to convert AUD back to USD to fund the refund — a double conversion cost. Best practice: hold a USD balance in Airwallex equal to your expected refund liability (typically 2–5% of monthly USD revenue) to avoid conversion round-trips on refunds.
What about VAT and GST on international sales?
Australian businesses selling to overseas customers generally do not charge GST if the goods are exported within 60 days. Digital products sold to overseas consumers may be subject to the destination country’s VAT (UK VAT, EU VAT via IOSS, etc.). Stripe and Airwallex can handle VAT collection for EU and UK digital sales. Consult your accountant for your specific product mix and jurisdictions.
Are BNPL (buy now, pay later) options available for cross-border sales?
Afterpay, Klarna, and Zip are available through Stripe and Shopify Payments for customers in supported countries. BNPL processing fees are typically higher than card processing (4–6%) and the merchant receives the full payment upfront while the BNPL provider handles collections. For higher-ticket cross-border items, offering BNPL can increase conversion enough to offset the higher processing cost.
How do I avoid chargebacks on international orders?
Use a payment gateway with built-in fraud detection (Stripe Radar, Airwallex’s risk engine). Require CVV and AVS (address verification) for card payments. For high-value orders to new international customers, consider holding shipment for 24 hours to allow fraud checks to clear. Chargeback fees are typically USD 15–25 per dispute regardless of the outcome, and excessive chargeback rates can lead to account holds or termination.
Final Verdict — Airwallex + Stripe Is the Cheapest Cross-Border Payment Stack
Airwallex provides the lowest currency conversion cost for Australian ecommerce sellers, and its payment gateway is competitive on processing rates. For stores that need Stripe’s developer ecosystem, the Stripe + Airwallex combination — Stripe for payment processing, Airwallex for multi-currency settlement and conversion — costs roughly 3.1–4.2% all-in versus 6–8% for PayPal. The setup takes 1–2 hours and saves AUD 3,000–5,000 per USD 100,000 in revenue every year. The only ongoing cost is remembering to convert currencies on weekdays during business hours for the best rates.
Disclosure: This article contains affiliate links. We may earn a commission when you sign up through these links — at no extra cost to you. Fee comparisons are based on publicly available pricing schedules as of May 2026. Processing rates, FX margins, and platform fees change; verify current terms on each provider’s official website before making payment infrastructure decisions.