Home โ€บ Trading Tools โ€บ Swap Calculator

Swap Calculator

i What this calculator does

A swap calculator shows the daily overnight financing cost (or credit) that your broker charges when you hold a leveraged CFD or forex position past the daily rollover time, typically 22:00 GMT. For South African traders, these costs are calculated in USD or the base currency and need to be converted to ZAR. This calculator shows daily, weekly, monthly, and annual swap cost in ZAR.

๐Ÿ”„
Swap Calculator
Calculate daily and cumulative overnight financing on open positions

This calculator is for educational purposes only. Results are estimates. Not financial advice.

โ†— Calculation Result
Calculation Breakdown
Full transparency on how this result was calculated.

How to Use This Calculator

Enter your values above and click Calculate. Adjust any input to instantly see updated results. All calculations run client-side in your browser - no data is sent to any server.

This tool is built for South African traders using ZAR-denominated accounts or trading international instruments through FSCA-regulated brokers. Values are rounded for readability; full precision is used internally.

Key Takeaways

  • A swap is an interest rate adjustment applied to leveraged positions held past the daily rollover time. It reflects the cost of borrowing th
  • Use this calculator consistently - not occasionally - to build disciplined trading habits.
  • Calculator results are starting points. Verify critical values with your broker.

Frequently Asked Questions

What is an overnight swap in forex trading?

A swap is an interest rate adjustment applied to leveraged positions held past the daily rollover time. It reflects the cost of borrowing the currency you are long and the credit/debit from holding the currency you are short.

Why is the Wednesday swap triple?

In forex, trades settle two business days after execution. A position opened on Wednesday settles on Friday - but if held past Wednesday rollover, the settlement rolls to the following Monday, crossing the weekend. Three days of financing are charged in one night.

Are swap rates fixed?

No. Swap rates change with central bank interest rates. When the SARB raises the repo rate, ZAR-related swaps change accordingly.

Can swaps be positive (credits)?

Yes. If you are short a high-interest currency and long a lower-interest currency, you may receive a daily credit rather than paying a cost. This forms the basis of carry trading.

How do swap costs affect my SARS tax position?

Swap costs are deductible trading expenses. Swap credits are taxable income. Keep records of all swap charges and credits from your annual broker statement for your ITR12.

What is a swap-free account?

Islamic (swap-free) accounts do not charge or credit overnight swaps, replacing them with a flat administrative fee. FSCA-regulated brokers offering swap-free accounts must disclose the fee structure clearly.

How does this differ from a broker's swap calculator?

Broker calculators use the exact current swap rate for each instrument. This calculator uses a rate you enter, which allows comparison across brokers and scenarios.

Why do some positions earn swap while others cost swap?

This depends on the interest rate differential between the two currencies in the pair, and your position direction, holding the higher-yielding currency typically earns swap, holding the lower-yielding one typically costs swap, subject to your broker's specific markup.

Does swap apply if I close my position before the market closes?

No, swap is specifically charged or credited only for positions held open overnight, past your broker's defined rollover time, intraday positions closed before this cutoff don't incur swap charges.

Why is swap sometimes charged at triple the normal rate on Wednesdays?

Standard forex settlement conventions mean Wednesday's rollover often accounts for the weekend (when banks are closed), most brokers apply triple swap on this day to reflect the three days of value date movement.

Does swap rate stay constant, or can it change over time?

Swap rates can and do change, generally following shifts in the underlying interest rate differential between the two currencies, or changes in your specific broker's own markup policy, worth checking current rates periodically.

Are there swap-free account options if I want to avoid this cost entirely?

Yes, many brokers offer Islamic or swap-free account types specifically designed to avoid overnight interest charges, often used by traders following Islamic finance principles, worth checking if your broker offers this option.

Sources & methodology

Formulas are based on standard financial mathematics and industry conventions. For SA-specific regulatory context, see FSCA and SARB.

๐Ÿ›ก๏ธ
Put the numbers into practice

Test Swap Costs on a Real Demo

See actual swap rates applied to demo positions on a free FSCA-regulated demo account before committing capital.

Open a free demo account
  • FSCA RegulatedTrade with confidence
  • Practice Risk FreeReal market conditions
  • Beginner FriendlyPerfect for learning

79% of retail CFD accounts lose money. Demo accounts do not guarantee future profits.