Spreads, Commissions and the Real Cost of a Trade

Why a new position starts at a loss

Open a currency position and the platform will usually show a small negative number straight away. Nothing has gone wrong: the buy is filled at the ask and the position is then valued at the bid, and the gap between those two prices is the spread. It is the first cost of every trade, and it applies whether the position is held for thirty seconds or thirty days.

What the spread actually is

The spread is quoted in pips, or in fractions of a pip on five-decimal platforms. Its cash value depends on position size, not on the currency pair alone: a one-pip spread on a standard lot of EUR/USD costs roughly ten times what the same spread costs on a mini lot. Spreads are not fixed by nature either — they widen when liquidity thins, typically outside the main trading sessions, around scheduled data releases, and at the daily rollover.

Commission accounts and "zero commission" accounts

Two pricing models dominate retail forex. In a spread-only account the markup is built into the quoted price. In a commission account the raw market spread is passed through and a separate fee is charged per lot, per side. Neither model is inherently cheaper — an honest comparison adds the commission back onto the spread and looks at the total cost of a full round turn, on the pair and the size actually traded.

Swap: the cost of time

Holding a position past the daily rollover triggers a swap, an interest adjustment that reflects the rate differential between the two currencies. Swap can be a debit or a credit depending on the direction of the position, and it is typically applied at triple weight on one weekday to account for the weekend. On short-term trades swap is negligible; on positions held for weeks it can outweigh the spread entirely.

The costs that live in the fine print

Beyond spread, commission and swap, account documentation may list inactivity fees, withdrawal charges, and currency-conversion fees applied when the account currency differs from the settlement currency of the instrument. None of these appear on the trade ticket, which is precisely why they are easy to miss when conditions are being compared.

Comparing costs on a like-for-like basis

A cost comparison only means something once the variables are pinned down: the same pair, the same position size, the same time of day, and a full round turn rather than a single side. Averages published for a whole account type say little about the specific pair and hour someone actually trades. The only figure that describes a trader's own costs is the spread measured on their own platform, repeatedly, at the hours they send orders.