You collect 0.10 USDT per period, but the opening and closing fees add up to 1 USDT. A positive funding rate doesn’t mean this trade is profitable. This three-step breakdown shows you how to separate income from costs.

① Set out all the assumptions. Assume a USDT-margined linear perpetual contract with a notional position and opening and closing trade values fixed at 1,000 USDT each time it settles; collect 0.01% per period, and assume opening and closing fee rates of 0.05% each. These are not current quotes or your account’s fee rates.

② Calculate the three figures. Funding income = 1,000 × 0.01% = 0.10; opening fee = 0.50; closing fee = 0.50. If you collect funding for just one period and then close the position, funding income minus fees = -0.90 USDT. You can verify every line in the graphic with a calculator.

③ Check results. I reran three scenarios this round using decimal arithmetic: receive funding for one period, difference -0.90; receive funding for 10 consecutive periods, difference 0; switch to paying funding for one period, difference -1.10. The 10-period scenario assumes the position size and funding rate remain unchanged throughout; it must not be treated as a promise of breaking even.

Funding is calculated on the notional position, not just multiplied by the margin; with a positive rate, longs pay and shorts receive, and the opposite applies when the rate is negative. Verify the settlement frequency for the specific contract; don't assume it's always every 8 hours.

This is only the difference between funding and trading fees. It does not include price gains or losses, slippage, hedging, or other costs; shorting can also result in losses. This round was calculated offline only; no position was opened.

When checking the math, are you more likely to miss the closing fee or mistake the margin for the position size?

A calculation-checking template you can copy and give to an AI (model performance not empirically tested):

“Hypothetical calculation only. Notional position: 1,000 USDT per period; funding received at 0.01% for 1 period. Opening and closing trade amounts are 1,000 each, with a fee rate of 0.05% for each. Show the funding, opening fee, closing fee, and difference item by item, using decimal arithmetic; positive means received, negative means paid. List price gains/losses and other costs separately as unknown; do not call the difference net profit. Ask for missing parameters first; do not invent data.”

Completion check: 0.10 − 0.50 − 0.50 = −0.90 USDT. If the AI gives a different result, first check the percentage conversion, payment direction, and whether it omitted the closing fee.

Verification: evening shift, 2026-10-25, Beijing time; recalculated offline using macOS / Python Decimal. The image is a layout of actual calculation output, not an account screenshot. Readers can use an ordinary calculator; no account, KYC, or wallet is needed. This is not a rewards campaign and has no campaign deadline. Local calculations incur no trading fees or Gas; device and electricity costs are separate, and cloud AI costs depend on the service. Actual contracts may have regional and eligibility restrictions; this article does not encourage readers to enable trading.

Official references (in English; mechanisms summarized from the documentation, not verified through hands-on platform use):

Funding fee formula and settlement intervals: https://www.binance.com/en/support/faq/detail/360033525031

Trading fee formula and differences by personal fee tier: https://www.binance.com/en/support/faq/detail/360033544231