An overnight swap (also called a rollover fee or swap rate) is a small interest charge — or occasionally a credit — applied to your trading account when you hold a CFD or forex position open past midnight server time. Most Australian CFD brokers calculate and apply this fee automatically, so many new traders don’t notice it until it quietly chips away at their profits over several days.
How Overnight Swap Works — A Practical Example
Say you open a long (buy) position on AUD/USD with a notional value of A$10,000 using 10:1 leverage. Your broker’s overnight swap rate for that pair is −0.45 annualised (negative, meaning you pay). Dividing that rate by 365 gives a daily charge of roughly 0.00123%, which on A$10,000 works out to about A$0.12 per night.
That sounds trivial — but hold the position for 60 days and you’ve paid around A$7.50 in swap fees alone, on top of your spread costs. On a larger position, say A$100,000 notional, that same rate costs roughly A$75 over two months. Swap fees scale directly with position size, so they matter most for traders who run large or medium-term positions.
On Wednesdays, most brokers apply a triple swap to account for the weekend settlement gap. If you’re holding an AUD/USD position into Wednesday night, expect three nights’ worth of charges in one hit. This is a standard market convention, not a broker trick — but it catches many beginners off guard.
Why Overnight Swap Matters for Australian Traders
ASIC requires licensed Australian brokers to clearly disclose all fees, including swap rates, in their Product Disclosure Statement (PDS). If a broker’s PDS doesn’t explain how swaps are calculated, that’s a compliance red flag. Always read the PDS before opening a position you plan to hold overnight. Brokers holding an Australian Financial Services Licence (AFSL) are legally obligated to provide this information in plain language.
For traders using leverage, swap fees are calculated on the full notional value of your position — not just your deposited margin. This means even a modest leverage ratio amplifies the real-world cost. A trader holding a leveraged position on ASX 200 CFDs or gold (XAU/USD) for several weeks can accumulate swap costs that rival their spread expenses, turning a borderline trade into a losing one.
Swap rates are also directional: long and short positions on the same pair often carry different rates. Sometimes holding a short position actually earns you a small positive swap credit. Understanding which side of the market attracts a positive or negative swap can influence whether a medium-term trade is worth holding — especially in carry-trade strategies built around interest rate differentials between currencies like AUD and USD.
Overnight Swap vs Spread — What’s the Difference?
The spread is a one-off cost paid at the moment you open a trade — it’s the gap between the buy and sell price. An overnight swap, by contrast, is a recurring daily charge applied every night you keep that position open. A short-term day trader who closes all positions before midnight pays zero swap fees but always pays the spread. A position trader or swing trader who holds for days or weeks pays the spread once but accumulates swap costs night after night. For most Australian traders holding positions longer than 24 hours, the overnight swap is the more important factor to check.
What to Check When Comparing Brokers
- Published swap rate tables: Look for brokers that display their swap rates directly in the trading platform (MT4/MT5 or cTrader) or on their website. Rates should be updated regularly and easy to find before you trade.
- Triple-Wednesday disclosure: Confirm the broker clearly explains the triple-swap rule for Wednesday positions. Transparent brokers mention this in their PDS or FAQ — it shouldn’t be a surprise on your statement.
- Swap-free (Islamic) accounts: If swap fees conflict with your beliefs or trading style, check whether the broker offers a genuine swap-free account structure. Some brokers substitute an administration fee, so compare the total cost carefully.
- Competitive rates on your preferred markets: Swap rates vary significantly between brokers, especially on exotic currency pairs, commodities like gold, and crypto CFDs. Pepperstone, for example, is known for tight swap rates on major forex pairs and is ASIC-licensed, making it a useful benchmark when comparing costs.
- Positive swap opportunities: Some brokers allow you to filter pairs or instruments that carry a positive swap on one side, which can be a small but real income stream for carry traders. Check if the platform makes this easy to identify.
See our picks for the best forex brokers in Australia — all ASIC-licensed, all live-tested by our team.
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