What Is Swap in Forex? Overnight Financing Explained
In retail forex, swap is the overnight financing credit or charge when you hold a position past the broker's rollover time. It is not the same thing as an institutional FX swap contract between banks.
Written by the calc.forex Editorial Team. Last reviewed . · 5 min read · How we check our numbers
Key takeaways
- Retail swap is overnight interest on a leveraged CFD or rolling spot position: you pay or earn a financing rate when you hold past rollover.
- Institutional FX swap is a different product: exchanging currencies today and reversing the exchange on a future date at a forward-adjusted rate.
- Brokers quote swap as points (MT4/MT5), money per lot, or an annual percentage. Convert points with pip/point size × contract size × lots.
- Many brokers apply a triple swap on one weekday (often Wednesday) to cover weekend financing in one charge.
- Use the forex swap calculator with your broker's long and short rates to see the overnight cost before you hold.
On this page
What retail overnight swap is
When you buy or sell a currency pair on a retail broker, you are usually trading a leveraged CFD or rolling spot contract that does not settle into a bank wire each day. If you keep the position open past the broker's daily cut-off (often 17:00 New York time), the broker applies an overnight swap — also called rollover or financing.
Economically it reflects the interest-rate differential between the two currencies in the pair, plus the broker's markup. You earn swap on the currency you are notionally long and pay on the currency you are short; after the markup, both long and short can be a charge.
Swap is separate from spread and commission. Spread is paid when you open (and sometimes close); commission is a fee per lot; swap accrues only while you hold overnight.
Retail swap vs institutional FX swap
Search results for "what is swap in forex" often mix two meanings:
| Retail overnight swap / rollover | Institutional FX swap | |
|---|---|---|
| Who uses it | Retail CFD and rolling-spot accounts | Banks, funds, corporates |
| What it is | Daily financing on an open leveraged position | Exchange currencies near-term and reverse later (spot–forward) |
| How you see it | Swap points or $ per lot on the platform | A quoted near/far rate or points in the interbank market |
| This site | Covered by the swap calculator | Not a retail calculator product |
If you are reading a Wikipedia-style page about FX swaps as derivatives between institutions, that is the second column. If your MT4 account shows "Swap" on an open trade, that is the first. This guide is about the retail fee.
How swap is calculated
Brokers publish long and short swap rates per lot. Common formats:
or = Money-per-lot rate × Lots
or ≈ Position value × Annual % ÷ 360 (or 365)
On MT4/MT5, Specification often lists swap in points. A point here is the platform's minimum price increment (a pipette on five-digit forex), not necessarily a pip. Example shape: if long swap is −7.5 points on EUR/USD, point size is 0.00001 and the contract is 100,000, then one night on 1 lot is −7.5 × 0.00001 × 100,000 = −$7.50 for a USD account (before conversion if your account currency differs).
Rates change with interest-rate expectations and with the broker's book. Always take the numbers from your symbol Specification or contract specs, not from a blog post.
Worked example
Hold 1.00 lot of EUR/USD long for five nights, with one triple-swap Wednesday, long swap −7.5 points, point size 0.00001, contract 100,000, USD account.
| Step | Calculation | Result |
|---|---|---|
| Swap per night | −7.5 × 0.00001 × 100,000 × 1 | −$7.50 |
| Ordinary nights | 4 × −$7.50 | −$30.00 |
| Triple-swap night | 3 × −$7.50 | −$22.50 |
| Total for five calendar nights with one triple | −$30.00 − $22.50 | −$52.50 |
Short swap on the same symbol might be a credit or a smaller charge. Run both directions in the swap calculator before deciding to hold.
Triple-swap / weekend rollover
Spot FX value dates normally skip weekends. To charge three days of financing when you hold across the weekend, many brokers apply a triple swap on one weekday — commonly Wednesday for major pairs — instead of posting swap on Saturday and Sunday.
The weekday can differ for some exotic pairs or metals. Check your broker's rollover calendar. When you count nights in the calculator, add two extra nights for each triple-swap night that falls in the holding period.
Swap-free accounts
Some accounts are marketed as swap-free (often for religious compliance). Financing may be replaced by an administrative fee after a grace period, or built into a wider spread. "Swap-free" does not always mean zero holding cost — read the account terms.
Common mistakes
- Ignoring swap on multi-day trades. A strategy that looks good on spread alone can lose after a week of negative swap.
- Confusing points with pips. MT4 swap points are usually in the platform's point size; treating them as pips overstates the charge by about 10× on five-digit quotes.
- Forgetting the triple night. Holding across the triple-swap weekday costs three days at once.
- Mixing retail swap with bank FX swaps. Different products; different maths.
More on how swap sits next to spread and commission is in the trading costs guide.
Frequently asked questions
What is swap in forex?
For retail traders, swap is the overnight financing credit or charge applied when you keep a leveraged forex or CFD position open past the broker's daily rollover time. It is based on interest-rate differentials and the broker's markup.
What is a swap fee in forex?
A swap fee is a negative overnight swap: you pay to hold the position. Positive swap is a credit. Many symbols charge swap on both long and short after the broker's markup.
How is forex swap calculated?
From the broker's long/short rate per lot. In MT4 points: swap money ≈ swap points × point size × contract size × lots. Other brokers quote money per lot or an annual percentage on notional value.
What is triple swap in forex?
A weekday (often Wednesday) when the broker posts three days of swap at once to cover weekend financing, because spot FX does not value on Saturday and Sunday.
Is a forex swap the same as an FX swap between banks?
No. An institutional FX swap exchanges currencies near-term and reverses later. Retail overnight swap is daily financing on a rolling leveraged position. Same word, different products.
