Funding Rates Explained: The Hidden Cost of Holding Crypto Perps

You open a leveraged Bitcoin long, the price barely moves for three days, and your balance is still lower than when you started. Fees explain part of it. The rest is usually funding — a small charge that settles every few hours on crypto perpetual futures, and one most beginners never notice until it adds up.

This guide explains what a funding rate is, who pays whom, how venues calculate it, and how to estimate what it costs over a real holding period. It is educational, not a trading system or financial advice. It builds on leverage and margin and futures, spot and CFDs, and you can watch funding settle in real time in the free paper trading simulator.

Key takeaways

• Perpetual futures never expire, so funding is the mechanism that pulls their price back toward spot.
• Positive rate: longs pay shorts. Negative rate: shorts pay longs. The payment goes trader to trader.
• Payment = notional × rate. It is charged on the full position, not your margin, so leverage magnifies it as a share of your deposit.
• Intervals differ: 8 hours is a common default, Hyperliquid pays every hour. Compare rates on the same time basis before you judge them.
• Small-looking rates compound into real money over days and weeks. Count funding before you hold a leveraged trade.

Why perpetual futures need funding

A normal futures contract has an expiry date. As that date approaches, its price has to converge with the spot price, because at expiry the two are settled against each other (see contango vs backwardation). A perpetual contract, or perp, has no expiry, so nothing forces that convergence. Without a fix, a perp on Bitcoin could drift far above or below the real market whenever one side is more eager.

Funding is that fix. If the perp trades above spot, the rate turns positive and longs pay shorts. Holding a long becomes more expensive and holding a short becomes paid, which encourages traders to sell the perp and narrows the gap. If the perp trades below spot, the rate turns negative and the flow reverses. Hyperliquid's documentation describes funding as "purely peer-to-peer" with no fees collected on the payments (Hyperliquid Docs, Funding).

How the rate is calculated

Most venues build the rate from two parts:

• A premium component, measuring how far the perp's order book sits above or below the spot price index, averaged over the interval.
• An interest-rate component, a small fixed baseline that reflects the cost of borrowing dollars versus borrowing crypto.

Binance and Hyperliquid both use the form Funding = average premium + clamp(interest rate − premium, −0.05%, +0.05%) on an 8-hour basis. Binance fixes the default interest rate at 0.03% per day, which is 0.01% per 8-hour interval or 0.00125% per hour on hourly contracts (Binance announcement, 16 Sep 2025). Hyperliquid uses the same 0.01% per 8 hours, pays one-eighth of the computed rate every hour, and caps funding at 0.5% per hour (Hyperliquid Docs).

The clamp has a practical effect worth knowing. Working through that formula, if the average premium stays between about −0.04% and +0.06%, the clamp cancels it and the rate lands exactly on 0.01% per 8 hours. That is why, in calm markets, you often see BTC and ETH funding sitting on the same small number for days. When one side gets crowded and the premium moves outside that band, funding starts to climb or turn negative.

Intervals are not universal. Binance's default is every 8 hours at 00:00, 08:00 and 16:00 UTC, but some contracts settle every 4 hours or hourly, and the interval can change. Always check the contract's own countdown before comparing two numbers.

Worked example (hypothetical)

The figures below are made up to show the arithmetic. They are not a forecast, a signal or a suggested trade.

You hold a $10,000 notional Bitcoin long at 10x, so about $1,000 of margin, on a venue that settles hourly.

How it is worked out: per payment = $10,000 × rate; per day = 24 payments; 30 days = 720 payments. At the baseline, $10,000 × 0.00125% = $0.125 per hour, or $3 a day.

Three lessons sit in that table:

1. Leverage multiplies the bite. $90 is 0.9% of the position but 9% of the margin. At 20x it would be 18% of the margin for the same notional.
2. "0.01%" means nothing without the interval. 0.01% every hour is eight times more per day than 0.01% every 8 hours.
3. Funding moves your liquidation price. Payments come out of margin, so a long that pays funding for weeks slowly edges closer to liquidation even if the price stands still. Re-check it with the liquidation price calculator.

If the rate were negative, the same long would receive those amounts and a short would pay them. Plug in your own size, rate and holding time with the funding rate calculator.

What funding can tell you about the market

Because funding reflects which side is paying to stay in, traders watch it as a sentiment gauge:

• Persistently high positive funding suggests many leveraged longs. That can precede sharp drops when they are forced out, but it can also last through long uptrends.
• Negative funding suggests shorts are dominant or longs have been flushed out.
• Funding near the baseline usually means a balanced, calmer market.

Use it as context alongside price, volume and the wider mood — the fear and greed index and Bitcoin dominance are two other common lenses. Funding is not a timing tool, and reading it as a buy or sell signal is a common way to lose money. Ethereum, Solana and smaller coins can carry very different funding from BTC on the same day.

How to practise with funding in paper trading

The VoxTradePro paper trading simulator uses live crypto prices, a virtual balance and no real money. Open positions show the current funding rate and the time to the next funding, and settled payments appear in the funding history, so you can watch the cost build up without risking anything.

1. Open a small virtual position on Bitcoin or Ethereum and note the displayed funding rate and next funding time.
2. Estimate the cost first with the funding rate calculator for the time you plan to hold.
3. Hold through a few settlements and compare the funding history with your estimate.
4. Repeat at different leverage and see how the same payment becomes a bigger share of margin.
5. Write funding into your plan. A trade idea that only works if you hold for weeks has to beat its funding as well as its fees. See risk management basics and position sizing.

Open the paper trading app → Free · live prices · no signup · no real money.

Common mistakes

• Ignoring funding on trades held for more than a day.
• Comparing rates across venues or contracts with different intervals.
• Calculating funding on margin instead of the full notional.
• Treating a high rate as a guaranteed reversal and shorting into it with high leverage.
• Assuming the shown rate is fixed. On most venues the displayed rate is an estimate that can change until settlement.
• Forgetting funding when testing a strategy: a backtest without funding can look far better than reality.

Funding is not only a crypto idea

Commodity traders face a similar holding cost in a different form: rolling expiring futures, as explained in contango vs backwardation, can cost or earn money on crude oil or gold positions. The lesson carries across markets — a leveraged position has a price for staying open, and it belongs in the plan from the start.

Educational content only. Not financial advice. DYOR. Trading crypto perpetual futures with leverage carries a high risk of loss. All examples are hypothetical, and funding rules and rates vary by venue and change over time.

Free tools for this guide

Estimate the cost of holding a perp with the funding rate calculator, check how it moves your liquidation level with the liquidation price calculator, then watch real funding settle in the paper trading simulator.

Frequently asked questions

Educational content only, not financial advice. See our disclaimer.

Next guide: Leverage and Margin Explained for Beginners