Do I have to pay interest on a margin short sale if I post full cash collateral?

How much is margin interest on shorts?

The margin interest charged will be 30,000 * 6.49% * 2/360 = $10.82. You will be charged $10.82 at the middle of the next month. For a short position, you need to borrow shares.

Margin Loan (USD)	Annual Margin Rate
500,000.01-1,000,000.00	4.99%
1,000,000.01-3,000,000.00	4.49%
>3,000,000.00	3.99%