Where a fee can sit

No page opened for this uses the word spread.

HMRC's cryptoassets manual says an exchange may hold some tokens, or some ordinary currency, so that it can carry out a trade. It says the exchange may act as a market maker in a limited sense. The manual's word for ordinary currency is fiat, which it explains as government-backed currency.

The same page says a trading fee will normally be a percentage of the trade, and that it is payable whether the trade acquires tokens or disposes of them. It gives no amount.

Sums takes a percentage labelled fee, and a percentage labelled spread, off an amount the reader types. That page says the working is not how any particular exchange works out a price.

On Ethereum the fee is the gas the transaction used, times the price for each unit of gas: the base fee plus any tip.

One payment of ether, with the fee that payment paid, is on A payment, line by line. This page does not turn that fee into dollars or pounds.

HMRC's manual says withdrawal fees may be applied when ordinary currency is withdrawn, and may also apply when tokens are withdrawn. It gives no amount.

No exchange's own list of charges was opened. This page does not say what any named exchange shows.

After a fraud, or after an investment that failed, someone may offer to get the money back if a fee is paid first. The charge may be called a tax, a solicitor's fee, or an admin fee.

If you are asked to pay, or to hand over a bank account, a card or other financial details, end the contact. Do not pay, and do not hand the details over.

The same account is on Asked to pay a fee to withdraw, on Recovery, and on Before you send money.