Why Was I Charged a Swap Fee for Holding a Forex Trade Overnight?

You opened a trade, went to bed, and your balance was a few dollars lower in the morning, or a lot lower on a Thursday morning. That is the swap. It is predictable once you know when and why it is applied.

What people on X are asking

In April 2025 a trader asked if you have ever wondered why your broker charges more than usual when you hold trades over the Wednesday daily close: swaps are tripled to account for the weekend. In December 2025 a broker account asked why your balance changes overnight, naming interest rate differences. In August 2026 a rebate site asked how forex swap fees affect positions held overnight, including the Wednesday triple. Here is the mechanism without the sales pitch.

The fact-checked answer

Why there is a charge at all. A spot forex trade settles two business days after it is made (T+2). Retail brokers don't deliver currency; they roll your position forward each day so you can hold it indefinitely. Rolling forward is the same as borrowing one currency and lending the other for a day. OANDA says the cost or credit reflects the interest differential between the two currencies and includes its admin fee, and that a position open at 5 p.m. ET is considered held overnight.

The formula. OANDA publishes it as: financing cost or credit = position value × applicable funding rate × 1/365, where the position value is your position size times the price at 5 p.m. ET. Other brokers quote swap points per lot instead, but the logic is the same.

Worked example. Long one standard lot of EUR/USD (100,000 euros) at 1.1154 is a position worth $111,540. Suppose the broker's net funding rate for that long position is −2.0% a year (you are paying). The nightly charge is 111,540 × 0.02 ÷ 365 = about $6.11. On a Wednesday night, three days are charged: about $18.33. Hold for a full week and you pay seven nights, about $42.79. These rates are illustrative; your platform shows the actual long and short swap for each symbol.

Nights of swap charged by the day you hold the position

Standard T+2 pattern described by OANDA and IG. Bank holidays shift settlement dates, so the multiple can fall on another day or be larger; some CFD symbols use a different triple day. Tap a column header to sort.

Position open at the cut-off on…	Settlement moves from → to	Nights charged
Monday	Wednesday → Thursday	1
Tuesday	Thursday → Friday	1
Wednesday	Friday → Monday	3
Thursday	Monday → Tuesday	1
Friday	Tuesday → Wednesday	1
Saturday, Sunday	No rollover	0

UXS decision diagram

Why did my balance change overnight?

Text version of the diagram

1. Was the position still open at the broker's daily cut-off (often 5 p.m. New York)? If no: No swap applies; look for commission, spread or a price move instead
2. Is the currency you bought paying a higher interest rate than the one you sold? If yes: You may earn a credit, unless the broker's markup is larger than the rate gap
3. Was the cut-off on a Wednesday or before a bank holiday? If yes: Several nights were charged at once (often three)
4. Is it a CFD on gold, oil or an index rather than a currency pair? If yes: The broker's own financing rate applies, plus any contract roll adjustment
5. Otherwise: Check the long and short swap values in the symbol specification before holding

Diagram drawn by UXS. A simplified decision aid for education, not a recommendation.

Why you pay on both sides sometimes. In theory, if you pay to hold one direction, you should earn the same on the other. In practice, brokers apply their fee to both sides, so when the rate gap is small, long and short positions can both be negative. Where the gap is large (for example, the US dollar against the Japanese yen, or the Mexican peso against the dollar), one direction can pay a meaningful credit. US policy rates matter here: FRED's effective federal funds rate was 3.88% on November 6, 2026. That is the basis of the carry trade, and of the large swaps on pairs like USD/MXN.

When the swap matters. For a day trade it is zero. For a swing trade held two weeks on one standard lot in the example above, about $85 of swap is equal to about 8 pips on EUR/USD, which can be a large part of the profit target. Leverage makes it bigger relative to your account, because the charge is on the full position, not your margin; see how much leverage to use in forex.

Swap-free accounts. Some brokers offer accounts without overnight interest, often for religious reasons. They typically replace swaps with a fixed fee or wider spreads after a set number of days. Read the terms. Prop firm accounts also charge swaps on held trades; see holding trades over the weekend in a prop firm challenge.

Swap charges also affect taxable gains; see how forex profits are taxed in the US.

Decision helper

Common mistakes

• Opening at 4:58 p.m. New York time and paying a full night.
• Not knowing the Wednesday triple until Thursday morning.
• Assuming a positive swap stays positive when rates change.
• Ignoring swap when calculating a swing trade's reward-to-risk.

FAQ

Why was I charged a swap fee?

Your position was open at the broker's daily cut-off, so it was rolled forward and charged the rate difference plus a fee.

Why is the swap tripled on Wednesday?

Spot FX settles T+2; rolling from Wednesday moves settlement from Friday to Monday, covering the weekend.

What time is the swap charged?

Often 5 p.m. New York time; check your broker's server time.

Can I earn swap instead of paying?

Yes, if you are long the higher-rate currency and the gap is larger than the broker's markup.

Do I pay swap on a trade I open and close the same day?

No, only positions open at the cut-off.

Is swap charged on the margin or the full position?

On the full position value, which is why leverage makes it larger.