When you sell a home, the sale price is not what you actually keep. A $500,000 sale can feel like a windfall until the agent commission, closing costs, remaining mortgage, and — often overlooked — the federal capital gains tax come out of it. This net proceeds calculator starts from your sale price and subtracts every layer that actually reduces the cash you walk away with, including the Section 121 home-sale exclusion, so the final number is what hits your bank account after taxes.
Unlike a simple closing-cost worksheet, this tool asks for your original cost basis and filing status. That lets it apply the $250,000 single-filer / $500,000 married-filing-jointly exclusion to your gain before estimating the long-term capital gains tax. The result is an after-tax, after-loan figure — your true net proceeds.
How to Use
- Enter the Home Sale Price — the amount the buyer has agreed to pay.
- Set the Agent Commission as a percentage. The traditional total is 6% (split between listing and buyer's agents), though negotiated rates around 4%–5% are increasingly common.
- Enter your Seller Closing Costs as a percentage. These cover the attorney, title insurance, escrow, and recording fees sellers pay, and usually run 1%–3% of the price.
- Type your Mortgage Payoff Balance — the remaining principal the title company will forward to your lender at closing.
- Enter your Cost Basis — roughly what you originally paid plus the cost of major capital improvements (a new roof, an addition, finished basement). This is subtracted from your net sale price to work out your taxable gain.
- Choose your Filing Status. Single filers qualify for the $250,000 exclusion; married couples filing jointly qualify for $500,000.
- Set your Long-Term Capital Gains Rate. Most middle-income sellers pay 15%; higher-income sellers pay 20%; modest-income sellers may qualify for 0%.
The result card breaks out commission, closing costs, your estimated gain, the tax exclusion, any taxable gain, the estimated capital gains tax, and finally your net proceeds — the cash you actually receive after the loan is paid off and the IRS has taken its share.
How Net Proceeds Are Calculated
The math works in two stages. First, the selling costs and loan payoff come straight out of the price:
Cash before tax = Sale Price − Commission − Closing Costs − Mortgage Payoff
Then the IRS looks at your gain, not your sale price:
Taxable Gain = max(0, Sale Price − Commission − Closing Costs − Cost Basis − Exclusion)
The exclusion is $250,000 for a single filer and $500,000 for married couples filing jointly — but only if you owned and used the home as your main residence for at least two of the five years before the sale. Whatever gain remains above that exclusion is taxed at your long-term capital gains rate (0%, 15%, or 20% federally).
Net Proceeds = Cash before tax − Capital Gains Tax
Worked example on a $500,000 sale: commission at 6% is $30,000, closing costs at 2% are $10,000, and the mortgage payoff is $350,000. Cash before tax is $500,000 − $30,000 − $10,000 − $350,000 = $110,000. With a $400,000 cost basis, your gain is only $60,000 — well under the $250,000 single exclusion — so the capital gains tax is $0 and your net proceeds stay at $110,000.
Why the Cost Basis Matters
Many sellers assume the entire sale price is taxable. It is not. You are taxed on the profit: sale price minus selling costs minus what you put into the property. Raising your cost basis with documented capital improvements — not routine repairs — directly shrinks the taxable gain.
Suppose instead that same seller bought for $300,000, so the gain on a $500,000 sale is $160,000. That still fits inside the $250,000 exclusion, so the tax remains $0. The exclusion is generous, which is why the vast majority of home sellers owe no federal tax at all. It only bites once the gain exceeds $250,000 (single) or $500,000 (married) — typically on long-held homes in hot markets.
Examples
Example 1 — The textbook move-up seller. Sale price $500,000, commission 6% ($30,000), closing costs 2% ($10,000), mortgage payoff $350,000, cost basis $400,000, single filer, 15% rate. Estimated gain is $60,000, fully covered by the $250,000 exclusion, so taxable gain and tax are both $0. Net proceeds to the seller: $110,000.
Example 2 — Married sellers with a large gain. A couple sells for $1,000,000, paying 6% commission ($60,000) and 2% closing ($20,000), with a $200,000 mortgage remaining and a $400,000 cost basis. Their gain is $520,000. The $500,000 married exclusion leaves only $20,000 taxable; at 15% that is just $3,000 of tax. Net proceeds are $1,000,000 − $60,000 − $20,000 − $200,000 − $3,000 = $717,000.
Example 3 — A single seller over the exclusion. Selling at $900,000 with 6% commission ($54,000), 2% closing ($18,000), $200,000 mortgage, and a $300,000 basis. Gain is $528,000; after the $250,000 single exclusion, $278,000 is taxed at 15% = $41,700. Net proceeds land at $586,300 — still healthy, but materially lower than the pre-tax figure because of the gain above the exclusion.
FAQ
How are net proceeds from a home sale calculated?
Start with the sale price and subtract the agent commission, seller closing costs, and the remaining mortgage payoff. Then estimate your capital gains tax: take the sale price, subtract selling costs and your cost basis, subtract the $250,000 (single) or $500,000 (married) exclusion, and tax whatever remains at your long-term rate. That tax is the final deduction to reach your net proceeds.
What counts toward my cost basis?
Your cost basis is the original purchase price plus the cost of capital improvements that add value — a new roof, kitchen or bathroom remodel, an addition, finished basement, or new HVAC. Routine repairs and maintenance do not increase your basis. Keep receipts, because a higher basis means a lower taxable gain.
Do I have to pay capital gains tax when I sell my house?
Usually not. If you are single and your gain is under $250,000, or married filing jointly and under $500,000, the entire gain is excluded from federal tax — provided you owned and lived in the home as your main residence for two of the past five years. Tax is owed only on the gain above those thresholds.
How much is the capital gains tax on a home sale?
Long-term federal rates are 0%, 15%, or 20%, depending on your total taxable income. Most sellers pay 15%. The tax applies only to the portion of your gain above the exclusion, not to the whole sale price. State taxes may also apply and are not included in this estimate.
What can I do to increase my net proceeds?
Negotiate the commission (even half a point on a $600,000 home is $3,000), time repairs to maximize curb value, confirm your full cost basis so you do not overpay tax, and — if your gain will exceed the exclusion — consider waiting until you meet the two-out-of-five-year residency test before selling.
Is my mortgage payoff subtracted from net proceeds?
Yes. Any remaining principal on your loan is paid off at closing from the sale funds, so it reduces the cash you receive dollar for dollar. A home with $500,000 in equity but a $400,000 mortgage nets you far less than one with the same equity and a $100,000 loan.
Disclaimer
This net proceeds calculator is provided for informational purposes only and does not constitute financial, tax, or legal advice. Figures are estimates based on the inputs you enter; actual commission rates, closing costs, transfer taxes, and state capital gains taxes vary by location and circumstance. The home-sale exclusion rules (IRS Publication 523) have ownership, residency, and use requirements this tool does not verify. Always confirm your actual gain, basis, and tax liability with a qualified tax professional before closing.