Separate transaction costs from holding costs
A spread-and-commission comparison answers a transaction-cost question. Holding a leveraged position over a funding boundary introduces another one. A modest spread saving can be outweighed by financing over several chargeable days, and a holding credit should not be assumed before reading the actual schedule.
Do not start by multiplying your cash deposit by an interest rate. The schedule may use position size or value rather than the margin placed on the account. A deposit and a market exposure are different quantities. This is why two positions using the same margin can have different holding costs.
Read the direction and the basis
OANDA’s UK financing explanation publishes separate long and short rates, describes charges or credits, and says rates can change daily. It distinguishes the calculation by asset class. This is a provider-specific example of why a generic “swap rate” screenshot is insufficient.
Record whether the amount is a percentage per year, points, pips, or money per contract. Check which sign represents a debit. Do not import a number from a charting website or another group entity without confirming that it applies to the same account and instrument.
If a schedule uses a notional-value formula, a hypothetical 20,000 account-currency exposure charged at 5% a year on a 365-day basis would produce approximately 2.74 per chargeable day. That example only illustrates 20,000 × 0.05 ÷ 365. It is not OANDA’s quote or a universal Forex funding formula.
A calendar day and a chargeable day can differ
Funding schedules may account for non-business settlement days on an earlier trading day. OANDA’s UK explanation describes multi-day adjustments for weekends and holidays and publishes its relevant timing. Those details should be read in the account’s current schedule rather than assumed from the weekday name.
A position opened and closed on the same local date can still cross a provider’s funding boundary. Conversely, counting the number of midnights on your own clock may not reproduce the statement. Write down the provider’s timezone, daylight-saving convention, cutoff and settlement adjustment.
Build a reconciliation you can check
- Identify the position. Note the symbol, long or short direction, size, account currency and platform account.
- Capture the applicable rate. Distinguish an indicative rate from the final rate and save the date.
- Apply the correct basis. Use the unit, day-count basis and number of chargeable days stated in the schedule.
- Inspect conversion. If the charge originates in another currency, check the rate and any mark-up used to convert it.
- Reconcile the statement. Compare the cash entry or accrued amount with the schedule. Retain the document if there is a discrepancy.
Rounding can explain small differences. A different number of settlement days, an incorrect position basis or a conversion mark-up can explain larger ones. Do not treat a rough spreadsheet estimate as proof that a statement is wrong.
Compare the period you actually mean
An intraday spread comparison and a week-long holding-cost comparison are separate exercises. Keep the assumptions beside the result so that a reader can reproduce it. A credit on one side today is not a guaranteed future credit, and a negative financing rate does not predict the underlying exchange rate.
The PipBriefing calculator covers spread and linear commission only. For financing, use the provider’s instrument-specific documentation and statement. Our OANDA profile links the platform scope used in this example; it is not an endorsement.