Swap rates are the silent tax on swing traders. Hold a standard lot of USD/CHF short for 30 days and you could pay $150 in overnight rollover. Hold USD/TRY long for the same period and you could collect $1,050 in positive swap, regardless of price action. Yet most traders ignore swap until it shows up on their statement. This calculator models the overnight rollover for any position across 20+ pairs and 5 brokers, flags the Wednesday triple-swap trap, and surfaces the carry-trade opportunities that institutional desks quietly milk.
Configure position & holding period. Swap rates sourced from broker spec sheets (April 2026). FX conversion fetched live from our rates engine.
| Side | Daily Swap | 30d Total | Annual | Verdict |
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| Broker | Daily | Over Period | vs Worst |
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How Overnight Swap Is Actually Calculated
The swap charge reflects the interest rate differential between the two currencies in the pair. When you go long EUR/USD, you are effectively borrowing USD (to buy) and holding EUR. If the Fed rate is 4.5% and the ECB rate is 3.0%, you are borrowing at 4.5% and earning 3.0%, so you pay the 1.5% spread as overnight swap. The broker adds its own markup (typically 0.25–0.75%) on top.
The formula used by most MT4/MT5 platforms is: Swap = Lot Size × Swap Rate in Points × Point Value. Points are converted to the quote currency, then the broker converts to your account currency using the daily close. This calculator replicates the same process using broker spec sheets and live FX from our rates engine.
The Wednesday Triple Swap Trap
Forex spot trades settle T+2 (trade date plus two business days). A position held through Wednesday 5 PM New York close will settle on Friday. But a Friday settlement rolls over the weekend to the following Monday, which means brokers book the extra two weekend days of interest on Wednesday night — resulting in a 3x swap charge. Swing traders who open positions Monday and exit Thursday routinely get blindsided by this.
If your swap is negative: avoid holding overnight Wednesday unless the setup is overwhelming. If your swap is positive (carry trade): deliberately hold through Wednesday to collect triple the daily swap. This is a known edge that Japanese retail carry traders have exploited on AUD/JPY and NZD/JPY for decades.
Carry Trade: Positive Swap Pairs
Carry trades profit from the interest rate differential itself, independent of price movement. Historically, going long on high-yield currencies (TRY, ZAR, MXN, RUB before 2022) against funding currencies (JPY, CHF) has delivered 8–18% annual yield from swap alone. The catch: exotic currencies are prone to 5–15% single-session devaluations during crises, which can erase years of accumulated swap in a single candle. The carry trade strategy guide covers position sizing for this.
Swap-Free (Islamic) Accounts
Swap-free accounts do not charge or credit overnight interest, in compliance with Sharia law. Brokers typically compensate with a flat administration fee after the first few days or slightly wider spreads. If you are holding negative-swap positions for weeks, a swap-free account can be cheaper than the cumulative rollover cost. But brokers are wise to traders gaming this, and many now restrict swap-free accounts to residents of eligible jurisdictions or charge the admin fee on all long-held positions.
| Broker | Swap-Free Available | Admin Fee | Restrictions |
|---|---|---|---|
| Exness | Yes | After 1 day (varies) | All accounts, opt-in |
| XM | Yes | None on majors | Eligible residents |
| IC Markets | Yes | Fixed per lot | Selected regions |
| Pepperstone | Yes | Admin fee day 2+ | Verification required |
| OctaFX | Yes | None | Standard default |
When Swap Is a Dealbreaker
Swing traders (3–10 days): Swap is roughly 10–30% of your expected profit. Factor it into R:R planning. Position traders (weeks to months): Swap can exceed your total profit on negative-yield pairs. Always check the broker swap sheet before entering. Day traders (intraday, close before 5 PM NY): Swap is irrelevant — you never hold past rollover. Scalpers: Same, but beware of accidental holds on Friday afternoon.
Frequently Asked Questions
A forex swap (also called overnight rollover or overnight interest) is the interest you pay or earn for holding a position past the daily 5 PM New York market close. It reflects the interest rate differential between the two currencies in the pair. If you hold a long position on a currency with a higher interest rate against one with a lower rate, you typically earn a positive swap. If the opposite, you pay a negative swap.
Wednesday night carries triple swap because forex trades settle T+2 (trade date plus two business days). A trade held through Wednesday 5 PM NY settles on Friday, but Friday positions roll over the weekend to settle the following Tuesday. Brokers book the extra two weekend days of interest on Wednesday night, resulting in a 3x swap charge. This applies to most pairs; some brokers apply triple swap on Friday instead.
A carry trade is a strategy where you go long on a high-interest-rate currency against a low-interest-rate currency, collecting the positive swap every night. Classic examples include long USD/TRY, long USD/ZAR, or long USD/MXN. The goal is to generate income from the interest differential. The risk is that the high-yield currency can depreciate rapidly, wiping out months of collected swap in a few sessions.
A swap-free account (also called Islamic account) does not charge or pay overnight swaps, complying with Sharia law that prohibits interest (Riba). Brokers typically compensate by charging a flat administration fee or widening spreads slightly. These accounts are offered by Exness, XM, IC Markets, and most major brokers. They are ideal for traders holding positions long-term without wanting to track swap costs.
Swap rates vary by broker, account type, and market conditions. Among major brokers, IC Markets and Pepperstone ECN accounts typically offer tighter swap rates on majors because they pass through interbank rates. Exness and XM have competitive rates with optional swap-free accounts. Always check the broker's live swap sheet before opening positions, as rates update daily based on central bank rates and liquidity providers.
Trading foreign exchange on margin carries a high level of risk and may not be suitable for all investors. The high degree of leverage can work against you as well as for you. Swap rates shown in this calculator are indicative values based on broker spec sheets from April 2026 and may differ from your broker's live rates at the moment of trade execution. Always verify rollover costs directly on your broker's platform before opening positions. Carry trade strategies involve exposure to exotic currency volatility and geopolitical risk. This article contains affiliate links, meaning ForexBastion may receive compensation at no additional cost to you.