Question 1

How is margin interest calculated?

Accepted Answer

You only pay interest on the borrowed portion, which is the position size minus your own margin. On a 5× position that is 80% of the notional. Multiply that borrowed amount by the daily (or hourly) rate and by the number of days held — it accrues continuously, win or lose.

Question 2

Does higher leverage cost more in interest?

Accepted Answer

Yes. More leverage means a bigger borrowed portion relative to your margin, so the same daily rate becomes a larger drag on your actual capital. Combined with funding on perpetuals, financing is a real reason high-leverage positions held for days or weeks rarely pay off even when the direction is right.

証拠金利息計算機

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