What Is a Swap in Trading?
A swap (also called rollover or overnight financing) is the interest paid or received for holding a leveraged position overnight. It reflects the cost of borrowing one currency to buy another.
How It Works
- When you buy EUR/USD, you are borrowing USD to buy EUR
- You pay interest on the borrowed USD and receive interest on the EUR you hold
- The net difference is your swap rate
If EUR interest rates are lower than USD rates, you pay swap on long positions. If EUR rates were higher, you would receive a swap credit.
Why Swaps Exist
Forex trades settle on a T+2 basis (two business days). When you hold a position overnight, your broker rolls the trade forward to avoid physical settlement. This rollover involves implicit borrowing costs.
CFD Swaps
For indices, commodities, and cryptocurrency CFDs, swaps represent the broker’s financing cost for keeping your leveraged position open. These are typically based on interbank rates plus a broker markup.
Triple Wednesday (Triple Swap)
Forex markets do not charge swaps on weekends because they are closed, but financing costs still apply. To account for this, brokers charge three days of swap on Wednesday night.
What This Means
- Monday night: 1× swap
- Tuesday night: 1× swap
- Wednesday night: 3× swap
- Thursday night: 1× swap
- Friday night: 1× swap
This calculator automatically factors in triple swap when calculating multi-day holding costs.
When Swaps Are Charged
Swap is typically charged at the daily rollover time, usually 5 PM New York time (10 PM GMT, or 11 PM GMT during daylight saving). You can view our current swap rates, updated daily (both long and short swaps).
Key Points
- If you open and close a position before rollover, no swap is charged
- Holding a trade for even a few minutes past rollover triggers a full day’s swap
- Holiday swaps may be charged on preceding business days
Positive vs. Negative Swaps
Negative Swap (You Pay)
Most retail positions incur negative swap. You are paying the broker for holding leveraged exposure overnight.
Positive Swap (You Receive)
In some cases, you may receive swap credits when interest rate differentials favor your position. Historically, carry trades exploited this by buying high-yield currencies and selling low-yield ones.
Reality Check
Retail swap rates include broker markup. Even when interbank rates suggest a positive swap, retail traders often receive reduced or negative rates.
Factors Affecting Swap Rates
Interest Rate Differentials
Central bank interest rates of both currencies determine the base swap.
Broker Markup
Brokers add their own margin, which is why swap rates vary between brokers.
Liquidity Conditions
During periods of tight liquidity, swap rates may widen.
Instrument Type
Crypto and exotic pairs typically carry higher (more negative) swaps due to increased funding costs.
Swap-Free (Islamic) Accounts
Many brokers offer swap-free accounts that comply with Islamic finance principles, which prohibit interest (riba).
Instead of Swap
- Some brokers charge no overnight fee
- Others apply administration fees
- Holding period limits may apply
- Not all instruments may be available swap-free
If swap costs significantly impact your strategy, a swap-free account may be worth considering regardless of religious requirements.
Strategies and Swap Considerations
Day Trading
Swaps do not apply if you close positions before rollover.
Swing Trading
Multi-day holds accumulate swap. Factor this into profit targets, especially for trades held over weeks.
Carry Trading
Positions are held specifically to earn positive swap. This requires favorable interest rate differentials and acceptance of directional risk.
Position Trading
Long-term trades can accumulate significant swap costs. A position costing $5 per day equals $150 per month, which can materially impact profitability.
Related Trading Calculators
Swap costs accumulate on every position held past rollover. Use these tools (or explore all trading calculators) to factor overnight financing into your sizing, risk exposure, and total cost of forex trading.
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