What is the stock profit formula?

Gross profit = (sellPrice − buyPrice) × shares. Net profit = (shares × sellPrice − feeSell) − (shares × buyPrice + feeBuy). Net percent return = net profit / total cost × 100.

How are stock fees treated for taxes?

Per IRS Publication 550, brokerage commissions are added to your cost basis on the buy side and subtracted from proceeds on the sell side. They are NOT separately deductible — they reduce your reportable capital gain on Form 8949 / Schedule D.

What is the difference between short-term and long-term capital gains?

Holding period ≤ 1 year = short-term, taxed at ordinary income rates (10-37% federal in 2026). Holding period > 1 year = long-term, taxed at 0/15/20% federal preferential rates. Most retail brokers (Schwab, Fidelity, Robinhood) auto-tag your lots by holding period.

How is wash sale rule handled?

IRC Section 1091: if you sell at a loss and buy back the same security within ±30 days, the loss is disallowed and the basis of the new purchase is increased by the disallowed loss. This calculator shows the raw P/L — your broker's 1099-B will adjust for wash sales.

Why is my net return percentage less than the price change percentage?

Because fees come out of net. A 5% price gain with $10 commission on a $1,000 trade leaves you with only 3% net. The fee impact is huge on small accounts — Robinhood-style $0 commissions changed the math for retail traders in 2019.

How does the calculator handle short positions?

Set buyPrice as the cover price (your exit) and sellPrice as the short entry price — and reverse them in your head. A future v2 will support an explicit "short" toggle for cleaner short-sale math.

What about dividends?

This tool calculates trade P/L only. To include dividends, add the dividend per share × shares to the gross profit. For total return analysis use the CAGR or IRR calculator. Qualified dividends are taxed at long-term capital gains rates in the US (0/15/20% in 2026).

Why does the green zone shade darker near the bottom?

The gradient is a visual cue: the higher in the zone, the closer you are to the exit; the lower, the closer to the entry. For a loss zone the gradient flips — red darkest near the bottom (deeper loss closer to exit).

How accurate is the calculation for futures/options?

For US single-stock options use shares × 100 as the share count (one contract controls 100 shares) and the option premium as the price. For futures, multiply by the contract size (e.g. /ES = $50 × S&P 500 index). Per-contract commissions (CME exchange fees + clearing fees) are typically $3-5 round trip.

What is the Markowitz framework that underlies this?

Harry Markowitz's 1952 Portfolio Selection paper formalized risk and return as random variables. A trade's realized return is one draw from that distribution — this calculator shows you the specific realized P/L, not the expected one. Markowitz won the 1990 Nobel Prize.

How do I account for currency on foreign stocks?

For ADRs (American Depositary Receipts) and US-listed foreign equities, no FX conversion needed. For directly-held foreign equities (e.g. Tokyo-listed Toyota), convert both buyPrice and sellPrice to USD at the spot rates on each trade date. IRS Pub 514 has the official method.

Why does the chart background turn yellow?

The yellow background (bg-yellow-50) is the Legitlads input-area color across all calculators — a deliberate signal that this region is interactive. It also recalls the amber CRT screens of Bloomberg and Quotron terminals in the 1980s.

Trade P/L zone chart

Stock Profit Calculator

To calculate your stock profit or loss, multiply (sellPrice − buyPrice) by shares and subtract fees: Net = shares × (sell − buy) − fees. This page shades the buy-to-sell zone green for gains and red for losses, with explicit fee impact callouts.

+$9,000

Net profit

60.00%

Net return

$9,000

Gross P/L

-$0.00

Fee impact

Buy. Sell. Read the zone.

Quick Conversion

FROM (Sell − Buy ($))

TO (Profit ($))9,000

sharesfees ($)

Formula: Profit = (sell − buy) × shares − fees

Buy / Sell Zone Chart

Trade inputs

Ticker

Buy $

Sell $

Fee buy

Fee sell

Total cost

$15,000

Net proceeds

$24,000

Trade presets

P/L conversion table (100 shares, $0 fees)

Buy → Sell	Gross $	Return %
$100 → $110	+$1000	10.0%
$100 → $125	+$2500	25.0%
$100 → $150	+$5000	50.0%
$100 → $200	+$10000	100.0%
$100 → $300	+$20000	200.0%
$100 → $95	$-500	-5.0%
$100 → $75	$-2500	-25.0%
$100 → $50	$-5000	-50.0%
$100 → $25	$-7500	-75.0%
$50 → $75	+$2500	50.0%

Bought in tranches? See Stock Average Calculator →

Formula

Net = (sell − buy) × shares − feeBuy − feeSell

Both buy and sell commissions adjust cost basis per IRS Pub 550. Realized gain reports on Form 8949 / Schedule D.

Worked: 100 sh × ($240 − $150) − $0 − $0 = $9,000 net on $15,000 invested = +60%.

From the 1913 Revenue Act to Robinhood: a short history of stock P/L

In 2026, a retail trader closing out an NVDA swing position at the day's high wants to know one number: did I make money after fees and how much did I make? This tool gives that answer in two seconds with a chart that anyone — accountant or amateur — can read at a glance.

The Sixteenth Amendment's 1913 Internal Revenue Act introduced the modern income tax in the United States. From day one, brokerage commissions were treated as basis adjustments rather than separate deductions — a convention that persists today in IRS Publication 550 and Form 8949. The 1913 act also introduced the now-universal capital-gains framework.

Harry Markowitz's 1952 Portfolio Selection paper introduced mean-variance optimization. A trader's realized P/L is one observation from the expected distribution Markowitz analyzed — the relationship between realized and expected return underlies modern portfolio theory. Markowitz, William Sharpe, and Merton Miller shared the 1990 Nobel Prize for the framework that links risk and return.

Frederick Macaulay's 1938 NBER work on bond duration introduced the weighted-time sensitivity framework. While not used directly for equity P/L, Macaulay duration is the bond equivalent of the equity P/L calculation: it asks "how much does my position move when the underlying changes?" — the same question the zone chart answers visually.

The 1968 Michael Jensen Journal of Finance paper used realized fund returns as the basis for measuring alpha. Jensen showed that the average mutual fund underperformed DCA into the S&P 500 net of fees — a finding that launched the index-fund revolution and the Vanguard 500 Index Fund (1976). Per-trade P/L visualization helps modern traders avoid the same alpha trap.

Brokerage commissions dropped from $50+ per trade in the 1970s to roughly $7-10 in the late 1990s (Schwab, ETrade) to literal zero in 2019 when Robinhood's zero-commission model forced the industry to follow. The OCC's order-flow payments now subsidize the $0 commission. The fee impact line in this calculator was historically the largest P/L drag — today it is usually zero for US listed equities.

By 2026, every major broker reports realized P/L per lot on the year-end 1099-B with wash-sale adjustments per IRC Section 1091 baked in. Tax-loss harvesting bots (Wealthfront, Betterment, Schwab Intelligent Portfolios) automate the strategy of selling losers against winners. This page's zone chart visualises a single trade — the atomic unit of all that systematic activity.

How to use the P/L zone chart

Enter ticker and shares. Ticker is for the trade log; shares drives the dollar P/L.
Buy and sell price. Per-share entry and exit. The chart shades green or red automatically.
Add fees. Commission per side. Zero for most US stocks since 2019 but matters for OTC, crypto, futures.
Read the badge. Top of chart shows gross dollar P/L; cards show net and percent return.
Log the trade. Bookmark to keep a P/L journal — great for tax-time and habit tracking.

Stock profit calculator — frequently asked questions

Have more questions? Contact us

What traders say

4.9

Based on 5,560 reviews

“The green/red zone is the cleanest visual P/L I have seen on a calculator. I run my AAPL & NVDA swing trades through this every Friday before tagging the lot in TurboTax — fee impact line is exactly what I needed.”

Vihaan Aditya Krishnamurthy

Active retail swing trader, options-heavy

May 22, 2026

“The wash-sale callout in FAQ #4 is gold. I link this page to clients who are confused about how IRS Publication 550 treats commissions. The META 2022 preset is a powerful teaching moment for anyone who held through the drawdown.”

Aleksandra Magdalena Wiśniewska-Kowalczyk

Wealth advisor, tax-efficient investing

April 29, 2026

“I use the penny-stock preset to show juniors how a $9.99 commission per side wipes out a 28% gross gain on a 5,000-share lot. Visualizing the fee bar against the gross P/L bar is more persuasive than any spreadsheet.”

Chukwuemeka Obinwa Chinedumere

CFA charterholder, multi-asset portfolio manager

April 4, 2026

“The BTC 2017 preset replicates my exact trade — $5k to $19k, $5 fee per side at Coinbase. I love the per-trade history feature, gives me a portable trade journal I can paste into my CPA's spreadsheet.”

Bronwyn Anthea van der Linde-Pretorius

Crypto investor, taxlot tracker

March 15, 2026

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