Futures Fee and Funding Calculator

How it works

Fees are charged on the notional value of the position, not on your margin. Enter the position size as notional — a position with $500 of margin at 10x is a $5,000 position.

The trading fee shown covers opening and closing at the taker rate, with the referral discount applied. Funding is calculated on notional for the number of eight-hour intervals your holding time spans.

• Trading fees: notional × taker rate × 2, less the invitee discount.
• Funding: notional × your funding rate × (hours ÷ 8).
• Margin required: notional ÷ leverage.
• No discount applies to funding — it is exchanged between traders, not charged by the exchange.

Why funding usually dominates

On short intraday trades, fees are the whole cost. Hold for a few days and funding overtakes them quickly.

A $10,000 notional position pays roughly $9.50 in round-trip fees with a discount. At a 0.01% funding rate, holding it costs $3 a day; at 0.05% — common in strongly trending markets — it costs $15 a day. Three days at that rate costs more than five complete round trips.

The funding rate is published in advance for the current interval on the contract page. Checking it before holding overnight takes ten seconds and is worth more than any fee optimisation.

What it does not model

This is a cost calculator, not a risk calculator.

• It does not model liquidation. A position closed automatically loses its margin, and that dwarfs every fee here.
• It assumes a fixed funding rate; real rates change every interval.
• It uses the taker rate. Maker orders cut trading fees substantially on futures.
• It ignores slippage, which on large positions or thin contracts can exceed the fee.

Leverage multiplies fees, funding and liquidation risk by the same factor. Lowering it is the only change that improves all three at once.