What Is Funding Rate Arbitrage? A Step-by-Step Guide

Funding rate arbitrage is a delta-neutral trade that goes short a perpetual futures contract on the exchange where funding is high and long the same coin on an exchange where funding is low, so the trader earns the difference in funding payments. Because the two positions are the same size and opposite in direction, price moves roughly cancel out. What is left is the funding spread, minus fees, slippage and the cost of tying up collateral on two venues.

Key takeaways

• Short the high-funding venue, long the low-funding venue, in equal notional size.
• Profit comes from the funding spread, not from price direction.
• Always normalize rates to APR before comparing, because intervals differ between exchanges.
• Each leg needs its own collateral, so capital is split across two venues.
• Entry and exit fees often take several days of funding to earn back.
• Exit when the spread no longer covers costs, funding flips, or a leg nears liquidation.

How funding rate arbitrage works

A funding rate is a periodic payment between longs and shorts on perpetual futures, contracts that never expire. When it is positive, longs pay shorts. When it is negative, shorts pay longs. Each exchange sets its own rate based on its own traders, so the same coin can pay very different funding on two venues at the same time.

The trade captures that difference:

• Short leg: open a short on the venue with the higher funding rate. When that rate is positive, you receive funding.
• Long leg: open a long of the same size on the venue with the lower funding rate. You pay a smaller amount, or receive funding if that rate is negative.

If the coin rises 10%, the long gains roughly what the short loses, and the reverse if it falls. Your position is delta-neutral: its value barely changes with price. The net funding flow is your return.

Step by step

1. Find the spread. Compare the same coin across venues after converting each rate to an APR: APR = rate ÷ interval hours × 8,760. Many CEXs pay every 8 hours, while Hyperliquid pays hourly, so raw numbers are not comparable.
2. Check the price gap between the two perps. If the short venue's perp trades well above the long venue's, you lock in a small bonus at entry. If it trades below, you start with a small loss that must be recovered.
3. Fund both accounts. Deposit collateral on each exchange before you trade. Check that both contracts are margined in a currency you hold, such as USDT on Binance or Bybit linear perpetuals, or USDC on many perp DEXs.
4. Open both legs at the same time. Match the size in coins, not in margin. A short of 0.5 BTC needs a long of 0.5 BTC.
5. Monitor the position. Watch funding each period, margin levels on both venues, and the price gap between the two contracts.
6. Close both legs together when an exit condition is met.

Sizing and collateral

Size each leg in the same number of coins so the price exposure cancels. Then decide how much margin to post on each side.

Higher leverage (a position larger than the margin behind it) frees capital but brings the liquidation price closer. The problem is that the two legs sit on different exchanges and cannot share margin. If the price rises sharply, the short loses on one venue while the long gains on the other, and the short can be liquidated even though the combined position is flat.

Leverage per leg	Margin per $10,000 leg	Total capital	Rough move to liquidation
1x	$10,000	$20,000	Very large
2x	$5,000	$10,000	About 50%, less maintenance margin
5x	$2,000	$4,000	About 20%, less maintenance margin

The move to liquidation is reduced by the maintenance margin, the minimum collateral an exchange requires to keep a position open. Many traders use low leverage and keep extra stablecoins ready to move to whichever venue needs margin. Whether each leg uses isolated margin (only that position's collateral) or cross margin (the whole account balance) also affects how much buffer it has.

Worked example: net return after fees

Assume these illustrative numbers for a coin trading on two exchanges:

• Venue A funding: +0.030% per 8h (32.85% APR). You go short here.
• Venue B funding: +0.005% per 8h (5.475% APR). You go long here.
• Position size: $10,000 per leg, held for 7 days (21 funding periods).
• Taker fee: 0.05% per fill; slippage: 0.02% per fill; four fills in total.
• Leverage: 2x per leg, so $10,000 of total capital.

Item	Calculation	Amount
Funding received (short on A)	$10,000 × 0.030% × 21	+$63.00
Funding paid (long on B)	$10,000 × 0.005% × 21	−$10.50
Trading fees	4 × $10,000 × 0.05%	−$20.00
Slippage	4 × $10,000 × 0.02%	−$8.00
Net profit		+$24.50

The net funding is $2.50 per period. Costs of $28 take 11.2 periods, or about 3.7 days, to earn back. Over the full 7 days, the trade nets $24.50 on $10,000 of capital, which is 0.245% in 7 days, or about 12.8% annualized (0.245% × 365 ÷ 7). The headline spread was 27.4% APR, so entry and exit costs roughly halved the real return. Held for longer at the same rates, the return moves closer to the headline spread, because those costs are paid only once. You can test your own numbers with the funding arbitrage calculator.

When to exit

Funding rates change every period, so a spread that exists today may be gone tomorrow. Common exit triggers:

• The spread compresses below what you need to cover exit fees and slippage.
• Funding flips, so the short venue starts paying you less than the long venue.
• The price gap turns in your favor, letting you close both legs with a basis gain on top of funding.
• Margin gets tight on one leg after a large move. Rebalance collateral or close both legs.
• A venue suspends deposits or withdrawals, which stops you from moving margin.

Common mistakes

• Comparing an hourly rate to an 8-hour rate without converting.
• Sizing legs by margin instead of by coin quantity, which leaves directional exposure.
• Ignoring the price gap between the two perps at entry.
• Chasing extreme rates on small coins, where funding often reverses quickly and slippage is high.
• Using high leverage on one leg with no plan to top up margin.

For a fuller list, see arbitrage risks.

How ArbTide helps

ArbTide's live funding rates page normalizes every rate to APR and shows the spread between venues for each coin, and funding history shows how stable a spread has been. The same page walks through the trade and its costs.