Stock Profit Calculator
Calculate precision net profit, percentage ROI, broker commissions, capital gains tax, and break-even metrics for long & short trades.
Long Trade Parameters
Standard Buy Low → Sell HighMinimum sell quotation to cover broker commissions and tax costs.
Switch to Target Solver to calculate required exit prices.
How Stock Profit is Calculated
Total capital expended including purchase price multiplied by shares, plus broker entry commissions.
Total exit revenue minus exit broker commissions, exchange fees, and capital gains tax liabilities.
Converts percentage trade gains into compounded annual rates for objective benchmark comparisons.
Mastering Stock Trade Profit, ROI & Break-Even Math
The Anatomy of a Stock Trade: Cost Basis vs Net Proceeds
Many retail traders estimate stock profit by simply taking (Sell Price - Buy Price) × Shares. However, real institutional and high-performing retail trading accounts for every friction point: broker commissions, exchange regulatory fees, borrowing costs for short positions, and capital gains taxes.
| Component | Long Trade (Buy Low, Sell High) | Short Trade (Sell High, Buy Low) |
|---|---|---|
| Entry Cost Basis | (Buy Price × Shares) + Buy Commission | Margin Collateral / Borrow Fee |
| Exit Revenue | (Sell Price × Shares) - Sell Commission | Short Proceeds - (Cover Price × Shares) |
| Gross Profit | Exit Revenue - Entry Cost Basis | Proceeds - Cover Cost - Fees |
| Tax Deduction | Max(0, Gross Profit × Tax Rate %) | Max(0, Gross Profit × Tax Rate %) |
| Net Profit | Gross Profit - Tax Amount | Gross Profit - Tax Amount |
Calculating Break-Even Price and Target Exit Strategy
Knowing your exact Break-Even Price before entering a trade ensures you never exit prematurely at what appears to be a small gain but turns out to be a net loss after broker fees:
Break-Even Price = (Total Cost Basis + Sell Commission) ÷ Total Shares
Similarly, when planning profit-taking targets, use our Target Profit Calculator to solve for the exact exit quotation needed to achieve a specific dollar amount after income tax deductions. You can cross-reference your trade allocations using our percentage calculator or simulate monthly cash flows with the EMI calculator.
Annualized Returns (CAGR) vs Holding Period
A 10% gain over 10 days represents an astounding annualized rate of return, whereas a 10% gain held over 5 years is below standard index fund benchmarks. By entering your Buy Date and Sell Date, this tool computes your exact holding period in days and compounds it into an Annualized Rate of Return (CAGR):
Annualized Return = ((1 + Total Net Return %) ^ (365 / Holding Days) - 1) × 100
This allows you to benchmark your swing trades, position trades, and long-term dividend equity holdings on equal footing.