International Funding Options
International Funding Options
Moving money across borders to fund an investment account is slower and more expensive than domestic transfers, but several methods now offer competitive rates and speeds. The best choice depends on your location, account type, and transfer frequency.
Key takeaways
- SWIFT wires are standard but costly ($30–$50 combined fees) and take 1–3 business days
- Wise offers mid-market rates with flat fees ($5–$8) and is fastest to banks and brokers with Wise integration
- Revolut works well for Revolut-to-Revolut transfers but less ideal for external brokerage funding
- Interactive Brokers (IBKR) accepts funding from many countries and offers competitive conversion rates (0.2–0.5%)
- For routine international funding, Wise typically offers the lowest total cost (0.1–0.3%)
SWIFT Wire Transfers: The International Standard
A SWIFT wire transfer is the traditional method for moving money between countries. SWIFT (Society for Worldwide Interbank Financial Telecommunication) is the global standardized messaging system that banks use to communicate payment instructions across borders.
Cost: Outbound wire fee ($25–$50) from your origin bank plus an inbound fee ($10–$30) at the receiving bank. Many brokers waive the inbound fee for new accounts. Total: $25–$80.
Speed: 1–3 business days depending on the countries involved. US to UK typically takes 1 business day. US to Asia or Australia typically takes 2–3 days due to time zone delays and intermediary bank processing.
Exchange rate: Your origin bank quotes a SWIFT rate (mid-market plus 1–2% spread) when you initiate the transfer. You see the amount in the destination currency before confirming.
Information required: To initiate a SWIFT wire to your brokerage, you'll need:
- SWIFT code of the receiving bank (8–11 character code, e.g., CHASUS33 for Chase US)
- Brokerage account number (or reference code provided by your broker)
- Receiving bank details (bank name, address, country)
- Beneficiary details (your full legal name, address, matching your brokerage account)
Example: You're wiring from Deutsche Bank (Frankfurt) to Interactive Brokers (USA).
- You initiate a wire for €10,000
- Deutsche Bank quotes 1.09 EUR/USD (mid-market is 1.105, so they're charging 1.5% spread)
- Your €10,000 becomes $10,900 in USD, minus $50 wire fees = $10,850 received
- IBKR credits your account with $10,850
Issue: If any of the beneficiary details don't match exactly (name, address, account number), the receiving bank will return the wire, and your origin bank will take 3–7 days to reverse it. Then you must re-initiate the wire with corrected information.
To avoid rejection:
- Copy your beneficiary details directly from your brokerage account (not from memory)
- Double-check the SWIFT code and bank address on your brokerage's website
- Test with a small amount ($100–$500) first if it's your first time wiring to that account
Wise: The Fastest and Cheapest for Most Routes
Wise has become the standard for expats and international investors because it combines mid-market rates with flat fees and integrates directly with many brokers.
Cost: Flat fee of $2–$8 depending on the amount and currency pair. For a $10,000 transfer, expect $6–$8. For smaller amounts ($1,000–$5,000), often $2–$4. This results in total cost of 0.06–0.08%.
Speed:
- Within the UK (GBP transfers between UK banks): Same day or next day
- US to UK or EU: 1–2 business days
- Asia, Australia, Canada: 1–3 business days
- Some destinations may take longer if they require intermediary banks
Integration: Wise has direct integration with Interactive Brokers, and many other brokers accept Wise transfers as normal bank transfers. This means transfers arrive faster than SWIFT wires because Wise batches transfers and uses optimized clearing routes.
Exchange rate: Mid-market rate (updated every minute) plus Wise's flat fee. You see the exact rate and fee before confirming.
How to set up:
- Create a Wise account and verify your identity (takes 10 minutes)
- Add your origin bank account and the destination brokerage account
- Initiate a transfer; Wise guides you through
- Funds arrive within 1–3 business days
Example: You're in Australia, want to fund a Vanguard AU account in AUD.
- You have AUD in a local Australian bank
- You transfer AUD 20,000 to Wise
- Wise deducts $5 AUD fee, gives you the option to transfer to your brokerage or receive a Wise debit card
- If transferring directly to your brokerage, Wise sends AUD 19,995 to Vanguard AU
- You can now invest in AUD
Caveat: Wise works best if your brokerage is in Wise's network. If your broker isn't, Wise still works, but the transfer goes through SWIFT, adding 1–2 days and potentially a receiving fee. Check with your brokerage first.
Revolut: Fast for Some Routes, Expensive for Others
Revolut is a fintech bank that offers multi-currency accounts and transfers. For international funding, it's useful if you're already using Revolut for everyday banking.
Cost: On balance transfers to an external account, Revolut charges 1–2% for large transfers. On smaller transfers (under $5K), sometimes a flat fee of $2–$4.
Speed: Within Revolut (between Revolut users): Instant. To external accounts: 1–3 business days.
Use case: You're using Revolut for travel or income, and you want to transfer balance to your brokerage. Revolut's integration with IBKR is direct (1-day clearing), but to other brokers, you're doing a standard bank transfer, which is slower.
Example: You're in Europe, earn in EUR, and want to fund a US brokerage (which requires USD).
- You have EUR on Revolut
- You convert EUR to USD on Revolut (they charge 0.5% spread on conversion)
- You transfer USD to your US brokerage (Revolut batches these, arrives in 1–2 days)
- Cost: 0.5% conversion + flat fee (usually included) = ~0.5–0.7% total
This is competitive but not cheaper than Wise. Use Revolut if you're already using it; otherwise, Wise is typically cheaper.
Interactive Brokers (IBKR): Built for International Funding
IBKR is specifically designed for global investors and offers multiple ways to fund your account.
Funding methods:
- Bank transfer / wire: Standard SWIFT wire with IBKR's conversion rate
- Wise transfer: Direct integration (IBKR has a Wise account)
- Crypto to cash: If you have Bitcoin or Ethereum, you can send it to IBKR and they'll convert to fiat (useful for some countries with restrictions on traditional transfers)
- Debit card top-up: In some countries, you can fund via debit card (charge is 1.5%)
Conversion rate: IBKR offers a mid-market rate plus a small markup (0.2–0.5% on forex rates). This is competitive for wire transfers.
Speed: Wire transfers 1–3 days. Direct debit or Wise transfers 1–2 days.
Minimum: IBKR requires a $1,000 minimum account balance to be considered "funded." Transfers under $1,000 may be rejected.
Advantage: IBKR has minimal account minimums for first-time deposits and accepts funding from nearly every country. This makes IBKR the default choice for expats or people in countries with limited broker options.
Comparison Table: International Funding Options
| Method | Cost | Speed | Best For |
|---|---|---|---|
| SWIFT wire | $30–$80 (1.5–2% spread + fees) | 1–3 days | Large transfers where speed matters ($50K+) |
| Wise | $5–$8 (0.06–0.08%) | 1–3 days | Routine transfers ($5K–$50K) to IBKR or major brokers |
| Revolut | 0.5–2% | 1–3 days (instant to Revolut) | If already using Revolut for banking |
| IBKR forex | 0.2–0.5% + wire fees | 1–3 days | Default choice; accepts transfers from any country |
Currency Accounts and Multi-Currency Funding
Some brokers (IBKR, Saxo, Interactive Brokers) offer multi-currency accounts. This means you can hold and invest in USD, EUR, GBP, AUD, etc., within the same account. Funding in your native currency and letting the brokerage convert offers flexibility.
Advantage: You can hold cash in multiple currencies for international investing. If you buy US stocks (in USD) and European stocks (in EUR), you don't have to convert between them constantly.
Disadvantage: Multi-currency accounts typically charge 0.1–0.2% for internal currency conversions, so if you fund in USD and then convert to EUR within the account, you pay a small fee. This is lower than a bank fee but adds up over time.
Best practice: Fund in the currency of your primary purchases. If you're mostly buying US stocks, fund in USD. If you're mostly buying European stocks, fund in EUR. Use Wise or IBKR's conversion rate for the initial currency conversion (once), then hold the currency in your account to avoid repeated conversions.
Documentation and Compliance for International Transfers
Most countries require documentation for transfers over a certain amount (e.g., $10,000 in the US, £5,000 in the UK). Brokers ask for this to comply with anti-money-laundering (AML) regulations.
Common documentation:
- Source of funds letter (e.g., "Funds are from my salary at XYZ Company")
- Proof of identity (passport, driver's license)
- Proof of address (recent utility bill, bank statement)
- For large transfers ($100K+), proof that the funds are legitimate (bank statements from the past 3 months, employment letter)
This is standard and applies to SWIFT wires, Wise transfers, and IBKR deposits. Brokers don't typically ask for this on the first transfer but may ask for larger subsequent transfers.
Strategic Routing for Large One-Time Transfers
If you're moving a large amount ($100K+) internationally—e.g., from an inheritance, bonus, or sale of property—consider:
- Wise for transfers under $50K: Cheaper and faster than SWIFT wire
- IBKR forex for $50K–$500K: Competitive conversion rate (0.2–0.5%) without the bank's 1.5–2% spread
- SWIFT wire directly to your brokerage for $500K+: At this scale, negotiate directly with your bank for a better rate (banks often offer 0.5–1% spreads for high-net-worth clients)
For routine monthly funding ($1K–$5K), always use Wise. The simplicity and cost savings make it the standard for expats.
Decision tree
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If you're not moving money internationally but instead using domestic sources (employer payroll, existing investments), those funding channels have their own mechanics and advantages. Employer-sponsored retirement accounts, in particular, offer pre-tax benefits that domestic funding methods can exploit.