CalcMyCoin

Funding Arbitrage Calculator

The delta-neutral classic: long spot, short perp, collect funding. Income is real but so is the cost of parking capital on both legs; this nets them.

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Results (live)

Funding collected$270
Capital cost (both legs)$164.38
Net$105.62
Annualized on capital3.2%

Estimates only, not financial advice. All math runs in your browser; nothing you type leaves this page.

How it works

income = size × funding × 3 × days

cost = 2 × size × capital APR × days/365

Worked example

$20k per leg at 0.015%/8h collects $270 over 30 days. Charging 5% APR on the $40k deployed costs $164, netting $106, ~3.2% annualized. Funding spikes make it; flat regimes starve it.

FAQ

Is this really riskless?

Delta yes, everything else no: funding flips negative, exchanges break, and the short leg can be liquidated in a violent wick before you rebalance.

Why count a capital cost?

Because that $40k could earn elsewhere. Skipping opportunity cost is how mediocre carry trades get called free money.

Related calculators

Position Size CalculatorSize from account risk and stop distance.Liquidation Price CalculatorWhere leverage ends the trade for you.Funding Rate CalculatorWhat holding a perp really costs.TP/SL CalculatorTake profit and stop levels from R multiples.

Estimates only, not financial, tax or investment advice. Verify numbers against your exchange or a professional before acting.