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Stock Trading P&L Calculator
Calculate your profit or loss including brokerage fees and understand tax implications.
Trading Results
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Detailed Calculation Breakdown
| Stock Name | - |
| Quantity Traded | - |
| Buy Price per Share | - |
| Total Buy Cost | - |
| Buy Brokerage Fee | - |
| Total Investment (with fees) | - |
| Sell Price per Share | - |
| Total Sell Value | - |
| Sell Brokerage Fee | - |
| Amount Received (after fees) | - |
| Gross Profit/Loss | - |
| Holding Period | - |
| Tax on Gains (if profit) | - |
| NET PROFIT/LOSS (After All Costs) | - |
Understanding Stock Trading Profit/Loss
What is Profit/Loss?
Profit/Loss (P&L) is the difference between what you invest in a stock and what you receive when you sell it, after accounting for all costs (brokerage fees) and taxes. It's not just the difference between buy and sell price - fees and taxes matter a lot!
Gross P&L = (Sell Price - Buy Price) × Quantity
Net P&L = Gross P&L - Brokerage Fees (Buy + Sell) - Taxes on Gains
Brokerage Fees Impact
- Buy Fee (0.5%): Added to your total cost. If you buy $10,000 worth, you pay $50 extra.
- Sell Fee (0.5%): Deducted from your proceeds. If you sell $11,000 worth, you receive $10,945 only.
- Total Impact: Fees can be 1-2% of transaction value. On a 5% profit, 1% fees can cut your profit in half!
- Example: Buy 100 shares @ $100 ($10,000 + $50 fee = $10,050 invested). Sell @ $105 ($10,500 - $52.50 fee = $10,447.50). Net gain = $397.50 = 3.95% (not 5%)
Capital Gains Tax
- Long-Term Capital Gains (LTCG): Held > 1 year. Tax rate typically 10-20%.
- Short-Term Capital Gains (STCG): Held < 1 year. Taxed as ordinary income, 20-50%.
- Tax Only on Gains: You don't pay tax on entire sale amount, only on profit. If you sell at loss, no tax.
- Tax Impact on Returns: A 20% gain becomes 16% net if taxed at 20%. On 50% gain with STCG, net could be 25-30%.
Real-World Example
- Buy: 100 shares @ $100 = $10,000 + 0.5% fee = $10,050 invested
- Sell: 100 shares @ $115 = $11,500 - 0.5% fee = $11,425 received
- Gross Profit: $11,425 - $10,050 = $1,375 (13.7% gross gain)
- Tax (20% LTCG): $1,375 × 20% = $275
- Net Profit: $1,375 - $275 = $1,100 (11% net gain)
Tax-Smart Trading Tips
Holding Period Matters
- Long-Term (1+ year): Usually lower tax rate (10-20% LTCG). If profit, wait 1-year mark if possible.
- Short-Term (< 1 year): Taxed at higher ordinary income rate (20-50% STCG). Avoid if possible.
- Strategy: If stock up 15% in 11 months and STCG is 30%, wait 1 month for LTCG at 20% (saves 10% tax).
Tax Loss Harvesting
- Sell Losing Stocks: If you have $50K loss on one stock, offset against $50K gain on another. No tax on net profit.
- Carry Forward: Losses can carry forward to offset future year gains.
- Caution: Wash sale rules prevent buying same stock back immediately after loss.
Position Sizing for Taxes
- Partial Profit Taking: Sell in batches to spread tax load across years.
- Hold Winners: Let big winners compound. Taxed only when sold, not while held.
- Different Tax Lots: Sell highest-cost-basis shares first to minimize gains.
Frequently Asked Questions
How are capital gains taxed?
Long-term (1+ year): Lower rate (10-20%). Short-term (< 1 year): Higher rate (20-50%). Only gains are taxed, not sale amount. Loss can offset gains.
Do I owe taxes if I made a loss?
No tax on losses. But you can use losses to offset gains from other stocks. Carry forward unused losses to future years.
Why do brokerage fees matter?
On a 5% gain with 1% fees, you lose 20% of your profit. On frequent trading, small fees compound. Minimize trades to reduce fee impact.
Should I hold to get LTCG benefit?
If near 1-year mark, wait for LTCG (10-20% vs STCG 20-50%). Can save 10-30% tax. If fundamentals weak, exit regardless of holding period.
What if stock drops after I buy?
You have a loss. Hold for LTCG or harvest loss to offset other gains. Only hold losers if fundamentals still strong. Cut bad investments.
How much profit do I actually keep?
Net profit = Gross profit - Brokerage - Taxes. Don't forget to calculate all costs. Many surprised net profit is much lower than gross.
Is it worth trading frequently?
Frequent trading = frequent fees & STCG taxes. Probably not worth it unless making 20%+ per trade to offset costs.
How to minimize taxes on trades?
Hold 1+ year (LTCG), harvest losses to offset gains, hold winners long-term, sell high-cost-basis shares first. Trade less frequently.
Trading Scenarios & Examples
Winning Trade Example
- Buy 50 shares @ $100: $5,000 + 0.5% fee = $5,025 invested
- Sell 50 shares @ $130: $6,500 - 0.5% fee = $6,467.50 received
- Gross Profit: $1,442.50 (28.7%)
- Tax (20% LTCG): $288.50
- Net Profit: $1,154 (23% net return)
Losing Trade Example
- Buy 100 shares @ $50: $5,000 + 0.5% fee = $5,025 invested
- Sell 100 shares @ $42: $4,200 - 0.5% fee = $4,179 received
- Gross Loss: -$846 (-16.8%)
- Tax: $0 (no tax on loss)
- Net Loss: -$846 (-16.8%)
Break-Even Analysis
To break even, account for all fees. With 0.5% buy + 0.5% sell = 1% total fees, you need at least 1% stock price increase just to break even. If holding longer for LTCG tax benefit, the fee impact is smaller percentage-wise, but still real.
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