Funding Arbitrage Calculator
Long one exchange, short another at the same time, collect the funding spread. This calculator turns a quoted spread into an honest annualized number · net of taker fees on both legs, rebalancing, and a slippage buffer. Pair this with our live funding arb screener to find current opportunities.
Inputs
Results
How the math works
- Income / interval = spread_pct × capital. Funding settles every 8 h.
- Intervals / year = 3 × 365 = 1095.
- Gross annual = income_per_interval × 1095.
- Fee cost / rebalance = 2 × (taker_long + taker_short) × capital.
- Annual rebalance cost = fee_per_rebalance × rebalances_per_year.
- Slippage buffer subtracted as flat bps × capital × rebalances.
- Net APR = gross_annual − fee_annual − slippage_annual, expressed as % of capital.
Rule of thumb: if netAPR < 10%, the trade is barely worth the operational complexity. 10-30% is a normal sustainable carry. > 50% usually means the spread is about to flip or one side is going to blow up.
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