FX Fees on US Stocks: The Hidden Cost Explained
Brokerage gets the attention, but currency conversion is what actually drains Australian US-stock portfolios. On a typical deposit the FX fee is ten times the cost of the trade itself. Here's every broker's rate, how the fee structures differ, and where you can legitimately pay less.
Key takeaways
- ·The FX fee is charged when AUD is converted to USD — typically 0.5%–1.5% depending on the broker. On A$10,000 that is A$50–$150, versus roughly A$4.60 of brokerage for a US$3 trade.
- ·Stake charges 0.55% per conversion (US$2 minimum), applied when you deposit — not per trade. Converting back at withdrawal triggers it again.
- ·Verified September 2026 rates: Superhero and Pearler 50bps, Stake and CommSec 0.55%, eToro 0.75% published (a discounted rate per its fees page — historically higher, with Club-tier discounts). moomoo charges no FX fee but embeds ~55 pips in its rate — its own FSG example equates that to a 0.55 USD fee per A$100 converted, about 0.85%.
- ·The rate matters far more than the structure: batching deposits only saves fixed minimums, while every dollar converted pays the percentage either way.
- ·ASX-domiciled US-exposure ETFs (IVV, VGS) sidestep the conversion entirely — at the cost of less control over timing.
The biggest fee nobody talks about
Ask an investor what their US trades cost and they'll quote the brokerage: US$3, maybe US$5. Almost nobody quotes the conversion fee — yet it is almost always the larger number. To buy US$6,500 of stock you first convert A$10,000. At Stake's 0.55%, that conversion costs A$55. The brokerage on the trade is about A$4.60. The "hidden" fee is roughly twelve times the headline one.
And it bites twice. Converting AUD to USD to invest triggers the fee, and converting USD back to AUD when you withdraw triggers it again. Over an investing lifetime, FX fees can quietly consume more than a year of returns.
Rule of thumb: every 0.10% of FX fee on A$10,000 converted is A$10. A 0.05% rate difference between brokers is only A$5 per A$10,000 — but a 1% difference is A$100, which is the gap between the cheapest and most expensive rates in the table above.
Every broker's FX fee (September 2026)
Verified against each platform's own pricing pages in September 2026. "When charged" matters almost as much as the rate — see the next section.
| Broker | FX rate | When charged | Cost on A$10,000 |
|---|---|---|---|
| moomoo | No fee, embedded spread | Per conversion (in the rate) | ~A$85 effective — ~55 pips per its FSG |
| Superhero | 50bps (0.50%) | Per trade | A$50 |
| Pearler | 50bps (0.50%) | Per conversion | A$50 |
| Stake | 0.55% (min US$2) | Per conversion (at deposit) | A$55 |
| CommSec | 0.55% | Per conversion (wallet funding) | A$55 |
| eToro | 0.75% published | Per conversion | A$75 — discounted rate; historically higher |
Stake Black subscribers pay a reduced rate below 0.55% (shown in the app). Webull's conversion cost varies by funding method — check in-app before depositing. moomoo's row is the effective cost implied by the 55-pip AUD/USD spread disclosed in its Financial Services Guide at ~0.65 AUD/USD; the real-time rate you are quoted moves with the market. Rates change — verify on each broker's pricing page before large conversions.
Rate vs structure: what actually matters
Broker marketing leans on FX "structure" — per deposit versus per trade. The maths says structure is a minor factor. Every dollar you convert pays the percentage fee exactly once, whether the conversion happens in one lump or ten pieces. Stake converting your A$10,000 deposit once at 0.55% costs A$55; Superhero converting A$833 with each of twelve trades at 0.50% costs A$50 on the same money. The structural difference between those two bills is A$5 per A$10,000.
Structure only becomes decisive with fixed minimums. Stake's US$2 minimum applies to every conversion, but 0.55% of anything above about A$570 already exceeds it. Where the minimum bites is frequent small deposits: ten A$300 top-ups pay ten minimums (~A$30 in fees that a single A$3,000 deposit would mostly avoid). If you deposit weekly in small amounts, batch them. If you deposit a few times a year, the minimum never comes into play.
The honest conclusion: the rate is the fee. A 0.05% structural advantage is worth A$5 per A$10,000; a 0.95% rate difference is worth A$95. Compare rates first.
Worked example: A$10,000, twelve trades, one year
Same investing behaviour, four different brokers. Exchange rate 0.65 USD/AUD; brokerage converted at that rate. This is total FX + brokerage cost only — platform features differ.
| Investor | FX cost | Brokerage | Year one total |
|---|---|---|---|
| Stake — 1 deposit, 12 trades | A$55.00 | 12 × US$3 ≈ A$55.40 | ≈ A$110 |
| Superhero — 1 deposit, 12 trades | ≈ A$50.00 | 12 × US$2 ≈ A$36.90 | ≈ A$87 |
| moomoo — 1 deposit, 12 trades | ≈ A$85 (embedded spread) | 12 × US$0.99 ≈ A$18.30 | ≈ A$103 |
| eToro — 1 deposit, 12 ETF buys | ≈ A$75.00 (published 0.75%) | A$0 (ETFs) | ≈ A$75 |
Five legitimate ways to pay less FX
Batch your deposits
Fewer, larger conversions avoid paying fixed minimums repeatedly and keep your strategy simple. Ten A$1,000 deposits become one A$10,000 conversion — same percentage, fewer minimums, less admin.
Check Stake Black if you convert A$30,000+ a year
Black's reduced FX rate is its main financial benefit. Run the deposit volume against the $20/month subscription before subscribing — the break-even maths is in our Stake Black review.
Use ASX-domiciled ETFs for pure index exposure
IVV, VGS and friends trade in AUD with zero conversion fee — the fund handles currency exposure internally. For broad index investing this is the cheapest route; see our S&P 500 guide for the direct-US vs ASX-ETF trade-off.
Convert when AUD is strong
The rate you're quoted moves with AUD/USD every second. Converting when the Aussie is relatively strong buys more USD per dollar — a 2% currency move dwarfs any broker's fee difference. Our AUD/USD guide covers the mechanics.
Re-verify rates before large conversions
FX fees are the most commonly changed number in broker pricing — Superhero's reprice and CommSec's 2026 US-fee cut both happened within months of each other, and moomoo's embedded spread sits in its FSG rather than its pricing page. Check the disclosures, not a year-old article.
The bottom line
Stake's 0.55% FX is mid-pack: beaten by Superhero's and Pearler's 50bps, cheaper than eToro's published 0.75% (whose real rate depends on Club tier and the life of its discount), and likely cheaper than moomoo once its embedded ~55-pip spread is counted. It is charged once per conversion with a small fixed minimum, so deposit batching keeps it predictable — and Stake Black reduces it further for high-volume converters.
Whichever broker you choose, the habit that saves the most money is the same: treat the conversion fee as the real cost of US investing, deposit in batches, and pick your moments. Getting FX right is worth more than shaving a dollar off brokerage ever will be.
Starting with Stake's full fee schedule? New users get a free stock + $10 credit with code jaymem884.
Not financial advice. FX rates verified September 2026 against each broker's published pricing and disclosures (moomoo's spread per its Financial Services Guide) — confirm current rates on each platform before converting.
Frequently asked questions
An FX (foreign exchange) fee is charged when your Australian dollars are converted to US dollars so you can buy US-listed shares. Australian brokers typically charge between 0.5% and 1.5% on top of the mid-market exchange rate. On a A$10,000 deposit, that is anywhere from A$50 to A$150 — usually far more than the brokerage on your first trade.
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