Swap rates are the overnight interest charges or credits your broker applies when you hold a forex position past the daily rollover time. They are small on any single night, and they are easy to ignore. But over a multi-day trade, swap rates can eat a large share of your profit, or quietly add to it, depending on which direction you trade.
This guide explains how swap rates work, where they come from and how to calculate them. It then covers triple swap Wednesday, the way brokers add their own markups, and what swap-free accounts really cost. Six costly mistakes follow, with a checklist you can use before holding any position overnight.
Key Takeaways
- A swap is a charge or credit applied when a position stays open past the daily rollover point, often 5 p.m. New York time.
- Swap rates mainly reflect the interest rate gap between the two currencies in a pair, plus the broker’s markup.
- Each pair usually shows two values: swap long for buy positions and swap short for sell positions.
- Swap is calculated on the full position value, not on the margin you put up.
- Triple swap Wednesday charges three days of swap at once to cover the weekend.
- A swap-free account is not cost-free, because brokers often replace the swap with an admin fee.
- Intraday traders who close before rollover avoid swap rates entirely.
What Are Swap Rates?
Swap rates are the interest adjustments applied to forex positions held overnight. Pepperstone’s guide to swaps defines a swap as a daily charge or credit applied if you hold a position past the rollover point. It is also known as “tom next,” short for tomorrow-next.
Think of every forex position as a loan. When you buy one currency, you are effectively borrowing the other to pay for it. The two currencies carry different interest rates, so the two sides of the loan do not cancel out. The difference is settled each day as the swap.
If the currency you hold earns more than the one you owe, you may receive a credit. If the reverse is true, you pay a charge.
Where Swap Rates Come From
Swap rates start in the interbank market. According to VT Markets’ rollover explainer, rates are derived from short-term money market interest rates, specifically tom-next interbank swap rates. Brokers source these from liquidity providers and convert them into amounts per lot.
A simplified version of the formula is the daily rollover, roughly equal to the base currency rate minus the quote currency rate, divided by 365, times the notional exposure, plus or minus the broker’s markup.
That is why swap rates move when central banks change policy rates. A hike or cut in one currency changes the gap, and with it the daily cost or credit. The figures on your platform change over time, so they should be checked before every swing trade.
Swap Long vs Swap Short
Each currency pair on your platform typically shows two swap values. Swap long applies to buy positions, and swap short applies to sell positions.
They are rarely mirror images. Pepperstone’s example for EUR/USD shows a long swap of negative 11.49 points and a short swap of positive 7.02 points. A long position pays, while a short position earns, though neither figure is the exact interest gap.
The difference between the two sides comes from the interest rate gap and the broker’s markup. IQ Option’s calculator guide adds that being long and being short mean holding opposite exposure, so financing can favor one side, and that broker factors can change the final number.
How to Calculate Swap Rates Step by Step
There are three common formulas, and which one applies depends on how your broker quotes the swap. The IQ Option swap calculator guide lists them:
- Percentage-based: position value times the daily swap rate times chargeable nights.
- Per-lot: lot size times the swap per lot times chargeable nights.
- Points-based: lot size times contract size times point size times swap points times chargeable nights.
For example, a 1,000 dollar position at 0.05% a night held for three nights costs 1.50 dollars. A 0.20 lot position at negative 6 dollars per lot for three nights costs 3.60 dollars.
Pepperstone’s formula for a EUR account is one point divided by the exchange rate, times trade size times the tom-next rate. With a long swap of negative 11.49 on 100,000 euros at 1.1290, the daily result is about negative 10.18 euros.
Position Value, Not Margin
One detail catches many traders. Swap is based on the full exposure of your position, not on the margin you deposited.
IQ Option gives a clear example. A 2,000 dollar position at 0.05% costs 1.00 dollar per night. If you mistakenly applied the rate to 100 dollars of margin, you would get 0.05 dollars, which is far too low.
This matters because leverage makes your position much larger than your deposit. A trader with 500 dollars of margin may hold a position worth 25,000 dollars or more. The overnight cost is calculated on the larger number, so leverage increases swap exposure as well as price exposure.
Triple Swap Wednesday Explained
Swap rates are not charged only for the nights you hold. Forex trades settle two business days after the trade date. A position held past the rollover on Wednesday is treated as executed on Thursday, so settlement moves to Monday, and the account is adjusted for three days of interest.
VT Markets gives an example. A daily credit of 5.50 dollars becomes 16.50 dollars that Wednesday, and a daily charge of 3.80 dollars becomes 11.40 dollars.
Not every instrument follows this pattern. Some brokers apply the triple charge on Friday for metals, indices or commodities. IQ Option warns against treating any single day as a universal rule. Always check your own broker’s schedule.
When Swap Rates Are Positive
A positive swap is a credit. It happens when the currency you are long earns a higher interest rate than the one you are short, and the gap is large enough to survive the broker’s markup.
This is the basis of the carry trade: buy a higher-yielding currency, fund it with a lower-yielding one, and collect the difference daily. VT Markets cautions that price moves can outweigh the daily interest, that unexpected central bank changes can reverse the carry, and that leverage magnifies losses even when the swap is positive.
For more on holding trades for days or weeks, see our guide on swing trading in forex and capturing market swings.
The Broker Markup Problem
The textbook interest gap and the number on your screen are rarely the same. Brokers add a markup, and VT Markets notes that two favorable interest rates can still produce a negative swap after markups.
Suppose the true gap favors your long position by 0.50% a year, but the broker adds a 0.75% markup. You would see a negative swap on both the long and short sides, even though one side should earn.
This is why you cannot judge a trade from central bank rates alone. Check the live long and short values on your own platform. If both are negative, you pay to hold the position in either direction.
Mistake 1: Holding Overnight Without Checking the Swap
The first costly mistake is not knowing your swap rates before you hold. IQ Option puts it simply: swap should be checked before a trade becomes a swing trade by accident.
A common story goes like this. A trader opens a short-term position, the price moves against it, and the trader decides to wait. The trade becomes a multi-day hold with a swap nobody planned for.
The fix is to decide in advance whether a trade is intraday or swing. Check the live long and short swap rates before entry, and write down the nightly cost next to your stop and target.
Mistake 2: Forgetting Triple Swap Wednesday
The second mistake is being surprised by a charge that is three times the normal amount. A position held through Wednesday’s rollover pays for the weekend, even if the market is closed.
A trader who knows the nightly figure but forgets the triple day will underestimate the cost of a five-day trade. In a quick calculation, five nights is not five times the swap. It can be seven chargeable nights.
Add the extra two days when you plan a hold. If the trade is marginal, consider closing before Wednesday’s rollover and reopening afterward, as long as the spread and slippage costs are lower than the swap you avoid.
Mistake 3: Using Margin Instead of Position Value
The third mistake is applying the swap to the wrong number. As the IQ Option examples show, the fee is based on the full position, not on your margin deposit.
Traders sometimes assume low margin means low overnight cost. The opposite is true at high leverage, because a small account can control a large position and pay swap on all of it.
Before opening a trade, multiply the nightly swap per lot by your lot size and by the number of nights you expect to hold. Then compare that total with your profit target. If the cost is a large share of the target, reduce size or skip the hold.
For more on exotic pairs, where holding costs are often the largest, see our guide on trading exotic currency pairs, their opportunities and risks.
Mistake 4: Treating a Positive Swap as Free Money
The fourth mistake is chasing carry because the credit looks attractive. A positive swap of a few dollars a night is easy to see. A 2% price move against a leveraged position is much larger.
VT Markets stresses that price volatility can easily outweigh the daily interest earned. A carry position can earn swap for weeks and then lose it all in a single central bank surprise.
Treat positive swap rates as a small tailwind, not as the reason for a trade. A good setup with a negative swap may still be worth taking. A weak setup with a positive swap is still a weak setup.
Mistake 5: Assuming Swap-Free Means Cost-Free
The fifth mistake is believing that a swap-free account removes the cost of holding. Swap-free accounts, also called Islamic accounts, exist for clients who cannot receive or pay interest for religious or other reasons. But brokers still have funding costs.
According to FXEmpire’s overview, the swap is usually replaced with an administration fee that varies by the instrument you hold, and sometimes there is a grace period before fees apply. The page cites fees per lot per night for EUR/USD of about 6 dollars at one broker and 9 dollars at another, though its own figures conflict in places.
Vantage’s help center says its fee is made up of the liquidity provider fee plus an internal processing fee, deducted from the account balance. Confirm the schedule with your broker.
Mistake 6: Not Comparing Brokers and Instruments
The sixth mistake is assuming all swap rates are the same. They are not. Two brokers can quote very different values for the same pair on the same day, because markups, liquidity providers and account types differ.
Instruments also differ. Exotic pairs, gold, indices and cryptocurrencies can carry swaps far larger than major pairs. VT Markets notes that major pairs are usually modest, while exotic pairs can be far more substantial.
When you compare brokers, include swap rates along with spreads, execution and regulation. For a swing trader, a broker with a tight spread and a punishing swap may cost more than a broker with a wider spread and a fair swap.
Why Swap Rates Change Over Time
Swap rates are not fixed. They move when central banks change policy rates, when liquidity providers reprice funding, and when your broker updates its markup. A pair that paid you last quarter can cost you this quarter without any change in your strategy.
IQ Option notes that swap rates can shift with market conditions, interest rates, liquidity and broker settings. Holiday weeks can also alter the schedule, so the swap rates you saw on Monday may not apply on Friday.
The practical lesson is to treat swap rates as live data. Do not copy a number from an old article, a forum post or last month’s screenshot into a trade plan. Read the current figure on your own platform every time you plan a multi-day hold.
Swap Rates on Gold, Indices and Crypto
Forex pairs are only part of the story. Metals, indices, commodities and cryptocurrencies also carry overnight financing, and their swap rates can look very different from currency pairs. They may be quoted in different units, charged on different triple days and set at much larger values.
One broker’s published table lists separate long and short swap rates for gold and several cryptocurrencies, and the numbers vary widely by instrument. That is a good reminder that swap rates on a non-currency product need their own check.
If you hold gold or an index for several days, never assume the forex rules carry over. Read the contract specification, find the triple day, and calculate the cost on the full position value before you commit.
How Swap Rates Affect Different Trading Styles
Your style decides how much swap rates matter. Scalpers and day traders close before rollover, so swap rates rarely touch them. Swing traders hold for days, so swap rates become a regular line item in their results.
Position traders and carry traders feel swap rates most. A trade held for weeks may collect or pay swap rates on every one of those nights, including every triple day. Over a long hold, swap rates can add up to more than the spread you paid to enter.
This is why a swing trader should record swap rates in the trade journal next to the entry, stop and target. If you review your results monthly, you will see exactly how much of your profit or loss came from price and how much came from holding costs.
A Worked Example: What a 10-Night Hold Really Costs
Here is an illustration using round numbers of my own. Suppose you hold 2 lots of a pair with a swap long of negative 6 dollars per lot per night. You keep the trade for 10 nights, and the hold includes one Wednesday.
Nine ordinary nights count as nine units. The Wednesday counts as three. That is 12 chargeable units. The cost is 2 lots times 6 dollars times 12, or 144 dollars.
At 10 dollars per pip per lot, 144 dollars is about 7.2 pips on a two-lot position. If your gross profit target was 300 dollars, swap consumes about 48% of it.
This ignores spread and the broker’s actual schedule. The point is that swap rates can quietly turn a decent trade into a poor one.
When Swap Rates Do Not Matter
Not every trader needs to worry. Pepperstone notes that intraday traders who close positions before the rollover point do not pay or receive swap charges. Scalpers and day traders usually fall into this group.
For them, spread, commission and slippage are the main costs. VT Markets suggests day traders consider closing positions before rollover to avoid unnecessary overnight financing.
If you plan to stay flat overnight, you can skim the numbers and focus elsewhere. But if you ever hold through a news event or let a losing trade run, remember that your decision may bring swap rates into the picture.
For more on short-term approaches that avoid rollover, see our guide on a comprehensive guide to day trading strategies.
A Swap Rates Checklist for Every Overnight Trade
Run through these steps before you hold a position past rollover.
- Check the live swap long and swap short for your pair.
- Calculate the nightly cost on the full position value.
- Count chargeable nights, including any triple day.
- Compare the total with your profit target.
- Check whether your broker adds a markup that makes both sides negative.
- Decide in advance whether the trade is intraday or swing.
- Review your swap costs monthly to see their share of total profit.
If the numbers do not work, change the size, change the pair or do not hold.
How to Find Swap Rates on Your Platform
Most platforms show swap rates in the contract specifications for each symbol. On common trading terminals, you can open the symbol list or market watch window, view the specification and read swap long and swap short, along with the calculation method and the triple swap day.
Look at the unit used. Some brokers quote swap in points, others in money per lot, and others as a percentage. The formula changes with the unit, so match the formula to the quote.
Check the swap rates again before each swing trade, since they can change with market conditions, interest rates, liquidity and broker settings.
Swap Rates FAQ: Quick Answers
Do I pay swap if I close before 5 p.m. New York time? Generally no, because positions closed before rollover avoid the charge.
Why is my swap negative on both sides? Broker markups can exceed the interest gap, so both directions may cost you.
Is swap the same as interest? It is closely related, as it reflects the rate gap between the two currencies plus broker adjustments.
Is a swap-free account free? Not usually, because admin fees or wider costs often replace the swap.
Is this financial advice? No. It is educational, and all examples are illustrative.
Conclusion: Know the Number Before You Hold
Swap rates are one of the least glamorous parts of forex trading and one of the most reliable ways to lose small amounts repeatedly. They do not show up in a price chart, but they appear in your account balance every night.
The six mistakes share one habit: not checking. Look at the live swap rates, count the nights, include the triple day and compare the total with your target. That takes two minutes and can save a large share of your profit.
The bottom line: Check the swap rates before you hold, because the cost of waiting is calculated on your full position, every night, whether the trade is working or not.
Disclaimer
This article is for educational and informational purposes only and does not constitute financial, investment or trading advice. Trading leveraged products involves substantial risk, including the possible loss of your capital. Swap rates, fees and schedules vary by broker, instrument and date, and may change after publication. All numerical examples are illustrative. Past performance does not guarantee future results. Always do your own research and consult a licensed financial adviser before making decisions.