Capital Gains Tax Calculator

ANA›Life Services Authority›National Calculator Authority›Capital Gains Tax Calculator

.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }

Capital Gains Tax Calculator

Estimate your federal capital gains tax based on your taxable income, filing status, and how long you held the asset.

Purchase Price ($)

Sale Price ($)

Additional Cost Basis / Fees ($)

Other Taxable Income This Year ($)

Filing Status

Single Married Filing Jointly Married Filing Separately Head of Household

Holding Period

Long-Term (held > 1 year) Short-Term (held ≤ 1 year)

Calculate

function capCalc() { var purchasePrice = parseFloat(document.getElementById('cap-purchase-price').value); var salePrice = parseFloat(document.getElementById('cap-sale-price').value); var costBasis = parseFloat(document.getElementById('cap-cost-basis').value) || 0; var ordinaryIncome = parseFloat(document.getElementById('cap-ordinary-income').value) || 0; var filingStatus = document.getElementById('cap-filing-status').value; var holdingPeriod = document.getElementById('cap-holding-period').value; var resultDiv = document.getElementById('cap-result');

// --- Validation --- if (isNaN(purchasePrice) || purchasePrice Please enter a valid purchase price.'; return; } if (isNaN(salePrice) || salePrice Please enter a valid sale price.'; return; } if (costBasis Additional cost basis cannot be negative.'; return; } if (ordinaryIncome Taxable income cannot be negative.'; return; }

// --- Capital Gain Calculation --- var totalBasis = purchasePrice + costBasis; var capitalGain = salePrice - totalBasis;

if (capitalGain ' + 'Purchase Price$' + purchasePrice.toFixed(2) + '' + 'Additional Cost Basis / Fees$' + costBasis.toFixed(2) + '' + 'Total Cost Basis$' + totalBasis.toFixed(2) + '' + 'Sale Price$' + salePrice.toFixed(2) + '' + 'Capital Gain$' + capitalGain.toFixed(2) + '' + 'Tax Rate Applied' + rateLabel + '' + 'Estimated Federal Tax Owed$' + taxOwed.toFixed(2) + '' + 'Net Proceeds After Tax$' + netProceeds.toFixed(2) + '' + ''; }

#### Formulas Used

Capital Gain = Sale Price − (Purchase Price + Additional Cost Basis)

Short-Term Tax = Tax(Ordinary Income + Capital Gain) − Tax(Ordinary Income) using 2024 federal marginal income tax brackets (10%–37%).

Long-Term Tax = Capital gain stacked on top of ordinary income and taxed at: • 0% — up to the 0% threshold • 15% — between the 0% and 15% thresholds • 20% — above the 15% threshold

Net Proceeds = Sale Price − Total Cost Basis − Tax Owed

#### Assumptions & References

Uses 2024 IRS tax brackets and long-term capital gains thresholds (Rev. Proc. 2023-34).
Long-term rates apply to assets held more than one year; short-term rates apply to assets held one year or less.
The calculator estimates federal tax only; state capital gains taxes are not included.
The Net Investment Income Tax (NIIT) of 3.8% (for high earners above $200K single / $250K MFJ) is not included.
Capital losses can offset capital gains dollar-for-dollar; up to $3,000 of net capital loss may be deducted against ordinary income per year, with the remainder carried forward.
References: IRS Topic No. 409 – Capital Gains and Losses.

Capital Gains Tax Calculator

Capital Gains Tax Calculator

More Calculators

References

Related Authorities