A funding rate is a small payment between longs and shorts on a perpetual future, settled every hour on Hyperliquid. Depending on your side and where the perp is trading, you either pay it or receive it.
It looks like a fee, but no platform collects it. The money goes from traders on one side to traders on the other, and it exists to keep the perp's price close to the real one. If you hold a position for longer than a quick trade, it's worth knowing how it moves.
Why funding exists at all
A normal futures contract expires, and on settlement day its price has to meet the real price. A perp never expires (the perps guide explains the instrument), so there's no settlement day pulling it back into line.
Funding does that job instead, continuously. It's how a Micron market can track Micron's price at 3am on a Sunday while the Nasdaq is closed.
Who pays whom, and why you might collect
When the perp trades above the underlying price, the funding rate is positive and longs pay shorts. That rewards selling and penalises buying, which nudges the perp back down. When it trades below, the rate is negative and shorts pay longs, nudging it back up.
So funding can be earned as well as paid. If everyone is piling into the long side of a hot market and you take the short side, the crowd pays you every hour for as long as the imbalance lasts. Some traders hold the unpopular side of a market specifically to collect funding. It isn't free money, since the price can still move against the position, but the payment is real and it lands in your margin.
How big the payments are
Individual funding payments are usually tiny fractions of a percent of your position size, and most of the time most markets sit at small, unremarkable rates. For a position you hold for a day, funding is often a rounding error.
Two things change that. The first is time: small payments every hour, for weeks, add up to a real cost. The second is crowding. When one side of a market gets very popular, the rate can climb well above its usual level, and holding the popular side through that stretch gets expensive in a way that surprises people. Long-held positions on the crowded side of a hot market are where funding bites.
How to treat funding as a trader
For short-term trades, note the rate and move on. For anything you plan to hold, check the current funding rate on the market before you open and treat it as a carrying cost, the way you'd treat interest on a loan. A position that's right about direction can still lose to funding if it's early and stubborn.
Funding is also information. A persistently high rate tells you the market is crowded on one side, and crowded trades tend to unwind hardest. Payments come out of or go into your margin, so on a leveraged position a long stretch of paying funding also nudges your liquidation price closer. You can see the current rate on any market Based connects you to.