Calculator Panel
Calculation Ready
Enter your values above and click Calculate.
What This Calculator Does
This calculator evaluates the minimum price target needed to escape a stock position without a net loss, ensuring that broker commissions are fully covered on both buy and sell sides.
How to Use This Calculator
Input purchase price per share, share count, and buying/selling commissions. Click Calculate to determine your break-even stock price and total transaction costs.
How the Calculation Works
The underlying math engine processes your inputs using exact formulas. This systematic approach ensures professional, institutional-grade calculation precision:
Mathematical Formula
Formula Legend:
- · Entry Price = Price paid per share during stock purchase.
- · Buy Commission = Total broker fees paid when buying.
- · Sell Commission = Total broker fees expected when selling.
- · Shares = Total number of shares purchased in the position.
Practical Example
Suppose you buy 100 shares of stock at $50.00 with a $10.00 buy fee, and anticipate another $10.00 fee to sell the position later:
Step-by-Step Mathematical Walkthrough:
- 1 First, sum buying and selling commissions: $10.00 + $10.00 = $20.00 total transaction cost.
- 2 Divide total fees by share count: $20.00 / 100 shares = $0.20 per share.
- 3 Add this premium to your entry share price: $50.00 + $0.20 = $50.20 break-even selling price per share.
- 4 Selling at exactly $50.20 yields a net return of $0.00.
Important Assumptions & Notes
- The position is fully liquidated in a single transaction.
- Commission fees represent flat dollar broker charges.
Common Mistakes or Considerations
- Assuming the break-even price is equal to the entry price, ignoring exit fees.
- Failing to recalculate break-even when averaging down or buying more shares.
Frequently Asked Questions
Why does my break-even price exceed my purchase price?
Because you must recover transaction commission fees paid to your broker on both the buy and sell sides to avoid losing money.
Does this account for capital gains tax?
No, capital gains taxes apply only to profitable trades and do not apply at absolute break-even where net profit is exactly zero.
How do trading fees affect my break-even price?
Every flat or percentage fee charged by your broker increases the stock price you must achieve upon selling to cover costs and break even.
Should I calculate a separate break-even when buying more shares?
Yes. Adding more shares at different prices alters your weighted average cost basis, which requires a new break-even calculation.
Can a stock break-even calculator help with short selling?
Yes, though the mechanics are inverted. For short positions, your break-even price is the initial short sale price minus transaction commissions.