vibgg
Guides · 2 min
How to calculate a crypto funding fee in dollars
Turn a funding-rate percentage into the amount a long or short position will actually pay or receive, including different settlement intervals and leverage.
A funding rate becomes useful only after it is converted into money. The calculation itself is short; the mistakes usually come from using margin instead of notional value, assuming the wrong settlement interval, or losing track of which side pays.
The core formula
funding payment = position notional × funding rate
For a USDT-margined perpetual, position notional is normally the contract quantity multiplied by the mark price. A $25,000 position at a funding rate of +0.0100% produces a $2.50 payment at that settlement:
$25,000 × 0.0001 = $2.50
If the rate is positive, a long normally pays and a short receives. If the rate is negative, the direction reverses. The magnitude comes from the same formula; the position side determines whether the result is a cost or income.
Calculate more than one settlement
For a fixed-rate scenario, multiply by the number of settlements crossed:
scenario total = notional × rate per settlement × settlements
Suppose the $25,000 position stays open for seven days and the contract settles every eight hours. That is three settlements a day, or 21 in total. If +0.0100% persisted, the long-position scenario would be $52.50.
This is not a forecast. Each future settlement can use a different rate, and the sign can change. For an exact historical total, add the actual payment at each settlement rather than multiplying one current rate.
Where leverage belongs
Leverage does not reduce the dollar funding payment when notional stays fixed. A $25,000 position pays the same $2.50 at 1x or 10x. Leverage changes the margin supporting it:
initial margin ≈ notional ÷ leverage funding as % of margin = funding payment ÷ margin
At 10x, approximately $2,500 of margin supports the example position, so a $2.50 payment equals 0.10% of that margin. This is why a small rate can matter to a highly leveraged account.
Intervals and contract types
Do not hard-code an eight-hour interval. Exchanges also use one-, two- and four-hour schedules, and some can shorten the interval during extreme conditions. Inverse contracts may express position value in the underlying asset rather than USDT, so use the venue's contract specification when reconstructing a payment.
The live funding comparison reads each venue's current interval and converts the rate into a 30-day dollar scenario. For a position with trading fees and spread included, use the all-in cost calculator.