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Hidden Trading Costs to Know

Trading fees explained one layer at a time, with the arithmetic shown, so the total cost of a trade is visible before you place it.

Researched and diagrammed by the ArkonBit desk. Updated 26 September 2026. See our research method

Macro close up of a price ticker display with tiny price increments highlighted

The picture in three lines

  • Every trade pays at least one cost you do not see on the fee page: the spread between buy and sell prices.
  • Holding leveraged positions overnight adds financing; moving crypto adds network and withdrawal fees.
  • Small costs compound with frequency, so the number of trades matters as much as the fee on each.

Trading fees explained properly means looking beyond the headline commission. Most of what a trade costs is built into prices, charged overnight or taken when money moves in and out. This page sorts those costs into layers and prices each one with illustrative numbers, so you can add them up yourself before trading.

Trading fees explained, layer by layer

CostWhen it is paidWhere it appears
SpreadEvery tradeGap between the buy and sell price
Commission or trading feeEach side of a tradeFee schedule; as a fixed amount or a percentage
Overnight financing (swap)Each night a leveraged position stays openAccount statement
Currency conversionWhen the asset's currency differs from your account'sBuilt into the exchange rate or listed as a percentage
Deposit and withdrawal feesWhen money moves in or outFunding page
Network fee (crypto)Each on-chain transferWithdrawal screen
SlippageWhen price moves before your order fillsDifference between expected and actual fill
Inactivity feeAfter a period without tradesTerms and conditions
Transparent chart with trend lines support and resistance levels and moving averages

A forex trade, fully costed

All numbers are illustrative. You trade 2 standard lots of EUR/USD with a spread of 1.2 pips and a commission of $3.50 per lot on each side. You hold the position from Monday to Friday, paying an assumed financing charge of $5 per lot per night.

Illustrative cost breakdown for 2 lots of EUR/USD held four nights

Spread: 2 × $10 × 1.2$24
Commission: $3.50 × 2 lots × 2 sides$14
Financing: $5 × 2 lots × 6 night-units$60

Total: $24 + $14 + $60 = $98. Six night-units, not four, because Wednesday's rollover is usually charged three times to cover the weekend.

Notice which bar is largest. For a short trade, spread and commission dominate. For a position held for days, financing often overtakes everything else. The triple charge on Wednesday nights surprises many new traders; see the forex guide for why it exists.

Crypto trading fees and network costs

Crypto platforms typically charge a percentage per trade, often with a lower maker fee for orders that add liquidity to the order book and a higher taker fee for orders that fill immediately. With an illustrative taker fee of 0.1%, buying $1,500 of a coin costs $1.50, and selling it later costs 0.1% again on whatever the proceeds are then.

Moving coins adds the network fee, which is usually a flat amount. An illustrative 1 USDT withdrawal fee is 2% of a 50 USDT transfer but only 0.1% of 1,000 USDT. Our USDT guide explains why fees differ between the Tron and Ethereum networks.

"Zero-fee" crypto purchases are rarely free. The cost usually sits in the price: a quoted rate a little above the market. Compare the price you are shown with the platform's own order book to see it.

Abstract upward and downward arrow sculpture representing interest rate changes

Break-even: how fees move the target

Fees mean a position must rise before it breaks even. With an illustrative fee of 0.2% on the buy and 0.2% on the sell, a coin bought at $3,200 must be sold at about $3,212.84 just to get your money back. The formula is buy price ÷ ((1 − fee) × (1 − fee)). The crypto profit calculator applies fees to both sides automatically.

Frequency: the cost multiplier

A cost that looks tiny on one trade becomes large when repeated. Suppose each round trip costs 0.2% of the amount traded. Ten round trips on the same money cost about 2% of it; a hundred cost about 20%, before any gains or losses. The more often you trade, the more the market must move in your favour just to stand still.

Illustrative cumulative cost at 0.2% per round trip

10 round trips≈ 2%
50 round trips≈ 10%
100 round trips≈ 20%

Simple sum of 0.2% per round trip, ignoring compounding, to show the scale of the effect.

Reading a fee schedule

Fee pages are written to look short. Read them with a specific trade in mind, and look for four things: whether a fee is a percentage or a fixed amount, whether it is charged per side or per round trip, which currency it is charged in, and whether spreads are described as "from" a figure. A spread quoted "from 0.6 pips" tells you the best case, not the typical one; some providers also publish average spreads, which are more useful.

For crypto platforms, check whether the fee tier depends on your monthly volume and whether paying fees in the platform's own token changes the rate. Both are designed to encourage more trading.

Practical ways to pay less

  • Trade less often. Frequency is the multiplier on every other cost.
  • Use limit orders where speed is not essential, to avoid slippage and, on crypto platforms, often to pay the lower maker fee.
  • Avoid holding leveraged positions overnight unless the plan requires it.
  • Batch crypto withdrawals and choose a supported network with lower fees, after confirming the receiver accepts it.
  • Hold a balance in the currency you trade most, where a provider allows it, to avoid repeated conversion.

Costs that are easy to miss

  • Currency conversion. Buying US shares from a sterling or euro account usually costs a conversion fee on the way in and again on the way out.
  • Inactivity fees. Some providers charge after months without trading.
  • Slippage. In fast markets, a market order can fill at a worse price than shown. Limit orders prevent this but may not fill.
  • Guaranteed stops. Some providers charge a premium for a stop that is guaranteed to fill at its level.

When comparing providers, add these to the headline numbers. Our ten checks for choosing a broker include a cost step for exactly this reason.

Costs reduce returns on every trade and increase losses. Leveraged positions also carry the risk of losing more quickly than you expect.

Short answers

What is the difference between a spread and a commission?

The spread is built into the prices you trade at; a commission is a separate charge. Some providers charge only a wider spread, others a tighter spread plus commission.

Why was I charged three times the swap on Wednesday?

Spot currency trades settle two business days after the trade. A position held over Wednesday's rollover settles after the weekend, so financing for Saturday and Sunday is usually charged then.

Are zero-commission apps free?

Not usually. Costs can sit in wider spreads, currency conversion, payment for order flow or other fees. Read the full fee schedule.

Sources

  • European Securities and Markets Authority, CFD product intervention measures (costs disclosure)
  • UK Financial Conduct Authority, Conduct of Business Sourcebook rules on cost disclosure