Short Selling Profit: Fees and Costs You Can't Ignore
Short selling means borrowing shares to sell first, then buying them back cheaper once the price falls, pocketing the difference — a bet in the opposite direction of a normal buy. But calculating your profit as simply entry price minus exit price misses real costs. You pay a borrow fee for the shares you've borrowed, accruing for every day you hold the position, and small regulatory fees apply when you sell. This calculator subtracts those costs from your raw price gain to show your actual net profit and return rate.
How Profit Breaks Down
| Item | Calculation |
|---|---|
| Price P/L | (Entry price − exit price) × quantity |
| Borrow fee | Sale proceeds × annual fee rate × days held / 365 |
| Regulatory fees | Sale proceeds × ~0.00278% (SEC Section 31) |
| Net P/L | Price P/L − borrow fee − regulatory fees |
Short selling carries especially large risk. A regular stock purchase caps your loss at 100% if the price goes to zero, but a short position has no ceiling on how high a stock can climb, so losses can theoretically be unlimited. A sharp price spike can also force you into a short squeeze, where you're compelled to buy back shares at a loss to close the position. If the stock pays a dividend while you're short, you also owe that dividend to the lender — on top of the daily-accruing borrow fee. Clear stop-loss discipline is essential.
Frequently Asked Questions
You borrow shares, sell them, then buy back cheaper if the price falls. The difference between entry and exit price is your profit.
The cost of borrowing shares, based on sale proceeds × annual rate × holding days. Hard-to-borrow stocks can cost much more.
In theory, yes — since a stock's price has no ceiling, short-sale losses can grow without bound, making risk management essential.
※ Regulatory fee rates and borrow fees vary by stock and broker; reference estimate only.