# Rollover and Swap in Forex > Holding a forex position overnight earns or pays interest called rollover or swap. Learn how it is calculated, triple Wednesday, swap free accounts and carry. Source: https://learn.tradelabsai.com/forex/rollover-and-swap-in-forex/ Track: Forex · Level: Beginner · Updated: 2026-10-03 Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice. Cite as: TradeLabs Learn, "Rollover and Swap in Forex", https://learn.tradelabsai.com/forex/rollover-and-swap-in-forex/ When you hold a spot forex position past the daily cut off, usually 5:00 p.m. New York time, your broker rolls it forward to the next value date. Because you are effectively borrowing one currency and holding another, you either earn or pay the interest rate difference between them. This charge or credit is called rollover, swap or overnight financing. For short term traders it is small; for positions held for weeks or months, it can add up to a meaningful gain or cost. The general concept is in [Rollover](https://learn.tradelabsai.com/markets/rollover/). ## Why rollover exists Spot forex trades normally settle two business days after the trade date (T+2; USD/CAD settles in one). Retail brokers keep positions open indefinitely by rolling them each day, using a short tom next swap, which closes the position for today's value date and reopens it for the next. The swap price reflects the interest rate difference between the two currencies. See [FX Swaps and Currency Swaps](https://learn.tradelabsai.com/forex/fx-swaps-and-currency-swaps/). ## Positive and negative swap | Position | You hold | You owe | Swap | |---|---|---|---| | Long a high yielding currency against a low yielder | Higher rate | Lower rate | Usually positive (you earn) | | Short a high yielding currency against a low yielder | Lower rate | Higher rate | Usually negative (you pay) | Brokers add a markup, so the swap you earn is less than the pure rate difference, and the swap you pay is more. In some cases both long and short swaps are negative. ## Calculating rollover A simplified estimate: ``` daily rollover ≈ position size × (rate of currency held - rate of currency owed) / 365 ``` **Example: Rollover on USD/JPY** You buy 100,000 USD/JPY, holding dollars and owing yen. Suppose the US dollar rate is 5.00% and the yen rate is 0.25%, a difference of 4.75%. Daily rollover before broker markup ≈ $100,000 × 4.75% / 365 ≈ $13.01. Over 30 days, about $390. A short position in the same pair would pay roughly that amount, plus markup. Rates are illustrative. The figure is converted into your account currency, and brokers publish daily swap rates per lot in their platforms. ## Triple swap Wednesday Because spot trades settle two business days later, a position held over Wednesday's cut off rolls from Friday's value date to Monday's, covering Saturday and Sunday. As a result, most brokers apply three days of rollover on Wednesday night. Some instruments, such as certain CFDs, apply the triple charge on Friday instead. Holidays in either currency's country can also create extra days. ## Rollover and carry trades Earning positive rollover is the basis of the currency carry trade: holding high yielding currencies funded by low yielding ones. The steady interest income can be wiped out by exchange rate moves, which is the main risk of carry. See [Carry Trades in Forex](https://learn.tradelabsai.com/forex/carry-trades-in-forex/) and [Interest Rate Differentials](https://learn.tradelabsai.com/forex/interest-rate-differentials/). ## Swap free accounts Some brokers offer swap free (often called Islamic) accounts for traders who cannot earn or pay interest for religious reasons. These usually replace swaps with fixed administration fees or wider spreads after a set number of days. Read the terms carefully. ## Rollover in forex futures and CFDs - **Currency futures:** there is no daily rollover; the interest difference is built into the futures price, and traders roll contracts quarterly. See [Currency Futures](https://learn.tradelabsai.com/forex/currency-futures/). - **CFDs:** similar overnight financing charges apply, often based on a benchmark rate plus a markup. See [What Is a CFD?](https://learn.tradelabsai.com/markets/what-is-a-cfd/). ## Practical tips 1. **Check swap rates** in your platform before holding positions overnight. 2. **Include rollover** in the expected return of swing and position trades. 3. **Watch Wednesday** for triple swaps. 4. **Remember that rates change** when central banks adjust policy. See [Central Banks Explained](https://learn.tradelabsai.com/macro/central-banks-explained/). ## Common mistakes - **Ignoring negative swap** on long term trades against the carry. - **Assuming positive swap is a reliable income** without considering currency risk. - **Forgetting broker markups.** ## Frequently asked questions ### What is rollover in forex? The interest earned or paid for holding a forex position overnight, based on the interest rate difference between the two currencies. ### Why is rollover tripled on Wednesday? Because positions held over Wednesday's cut off settle on Monday instead of Friday, covering the weekend, so three days of interest apply. ### Can rollover be positive? Yes. If you are long a currency with a higher interest rate than the one you are short, you may earn rollover, minus your broker's markup. Next, learn when the forex market is most active in [Forex Trading Sessions](https://learn.tradelabsai.com/forex/forex-trading-sessions/). ## Continue learning - Next lesson: [Forex Trading Sessions](https://learn.tradelabsai.com/forex/forex-trading-sessions/) - Previous lesson: [Leverage and Margin in Forex](https://learn.tradelabsai.com/forex/leverage-and-margin-in-forex/) - Related: [Leverage and Margin in Forex](https://learn.tradelabsai.com/forex/leverage-and-margin-in-forex/): Forex brokers offer high leverage through margin. Learn how margin is calculated, regulatory limits, margin calls and stop outs, and how to use leverage safely. - Related: [Carry Trades in Forex](https://learn.tradelabsai.com/forex/carry-trades-in-forex/): A forex carry trade buys a high yielding currency funded by a low yielding one. Learn how it earns, famous unwinds, funding currencies and how to manage crash risk. - Related: [Interest Rate Differentials](https://learn.tradelabsai.com/forex/interest-rate-differentials/): The gap between two countries' interest rates is a major driver of exchange rates. Learn why differentials move currencies, how to track them and their limits. - Related: [Rollover](https://learn.tradelabsai.com/markets/rollover/): Rollover means moving a position into a later contract, or carrying a forex trade overnight. Learn how futures rolls and forex swaps work and what they cost. - Related: [Financing and Overnight Costs](https://learn.tradelabsai.com/orders/financing-and-overnight-costs/): Holding leveraged positions overnight costs money. Learn margin interest, forex swaps, CFD financing, carry costs and how to include them in your trade plan. - Related: [FX Swaps and Currency Swaps](https://learn.tradelabsai.com/forex/fx-swaps-and-currency-swaps/): An FX swap exchanges currencies now and reverses later; a cross currency swap exchanges interest payments for years. Learn both, their pricing and their uses.