The tax code gives homeowners a generous exclusion — but appreciation, holding period, and selling costs all affect what you actually take home.
Most homeowners selling a primary residence won't owe any capital gains tax, thanks to the Section 121 exclusion. But the rules have specific requirements:
You bought your home for $600,000 in 2020. You're selling it for $1,100,000 in 2026. Your capital gain is $500,000. If you're married filing jointly, the entire gain is excluded — you owe $0 in capital gains tax.
If you're single, $250,000 is excluded and you'd owe tax on the remaining $250,000.
Your taxable gain isn't simply sale price minus purchase price. The IRS allows adjustments:
| Component | Example |
|---|---|
| Original purchase price | $600,000 |
| + Closing costs when you bought | +$12,000 |
| + Capital improvements (roof, kitchen, additions) | +$85,000 |
| = Adjusted cost basis | $697,000 |
| Component | Example |
|---|---|
| Sale price | $1,200,000 |
| − Selling costs (commissions, escrow, title) | −$38,000 |
| = Net proceeds | $1,162,000 |
| − Adjusted cost basis | −$697,000 |
| = Capital gain | $465,000 |
Notice that selling costs — including real estate commissions — reduce your gain. But here's the thing most people miss:
Some sellers think paying higher commissions is "good" because it reduces their capital gains. This is bad math. If you're in the 15% capital gains bracket, every $1,000 in extra commission only saves you $150 in taxes. You're still losing $850.
You always keep more money by paying less in commission — regardless of the tax impact.
Long-term capital gains (assets held over 1 year) are taxed at preferential rates:
| Tax Rate | Single Filers | Married Filing Jointly |
|---|---|---|
| 0% | Up to ~$47,025 | Up to ~$94,050 |
| 15% | $47,026 – $518,900 | $94,051 – $583,750 |
| 20% | Over $518,900 | Over $583,750 |
Note: High earners may also owe the 3.8% Net Investment Income Tax (NIIT) on capital gains.
Here's where it gets real. On a $1.5M home sale, the difference between traditional commission and ShopProp's flat fee changes everything:
| Traditional 2.5% | ShopProp $4,495 | |
|---|---|---|
| Listing commission | $37,500 | $4,495 |
| Tax deduction value (15% rate) | −$5,625 | −$674 |
| Net cost after tax benefit | $31,875 | $3,821 |
| You keep more with ShopProp | $28,054 | |
Even after accounting for the tax deduction, you save over $28,000 with ShopProp's flat fee. The tax benefit of higher commissions is a fraction of the actual cost.
If you sell before meeting the 2-year residency requirement due to a job relocation, health reasons, or unforeseen circumstances, you may qualify for a partial exclusion — prorated based on how long you lived there.
The Section 121 exclusion doesn't apply to investment properties or vacation homes. You'll owe capital gains on the full profit. Options include:
Inherited homes receive a "stepped-up basis" to fair market value at the date of death. If you sell shortly after inheriting, your gain may be minimal or zero. See our inherited property guide for details.
Property transfers between spouses in a divorce are generally tax-free. The receiving spouse takes the original cost basis. Planning the timing of a sale around the Section 121 exclusion can save significant taxes. See our divorce guide.
Here's the bottom line. Some agents argue that their commission is "partially offset" by the tax deduction. Let's test that claim:
| Home Price | Traditional 2.5% Commission | ShopProp $4,495 | You Keep More |
|---|---|---|---|
| $800K | $20,000 (saves $3,000 in tax) | $4,495 (saves $674) | $13,179 |
| $1.5M | $37,500 (saves $5,625) | $4,495 (saves $674) | $28,054 |
| $3M | $75,000 (saves $11,250) | $4,495 (saves $674) | $59,929 |
| $5M | $125,000 (saves $18,750) | $4,495 (saves $674) | $102,429 |
Tax savings calculated at 15% long-term capital gains rate. Your actual rate may differ.
At every price point, the math is overwhelming. You will always walk away with more money by paying a lower commission — the tax deduction doesn't come close to making up the difference.
See what you'd keep with ShopProp's flat fee vs. traditional percentage-based commission.
Calculate Your Savings Get StartedOr chat with our AI assistant for personalized guidance.
If you've lived in your home for at least 2 of the last 5 years, you can exclude up to $250,000 in gains (single) or $500,000 (married filing jointly). Gains above the exclusion are taxed at 0%, 15%, or 20% depending on your income bracket.
Yes — commissions reduce your net proceeds, which reduces your taxable gain. But paying less in commission always leaves you with more money. The tax deduction on commission is only worth your capital gains tax rate (typically 15%), not the full amount.
Improvements that add value, prolong the home's life, or adapt it to new uses: kitchen remodels, bathroom additions, new roof, HVAC systems, landscaping, deck additions, finished basements. Routine maintenance (painting, fixing leaks) does not count.
For primary residences, the Section 121 exclusion applies regardless of whether you buy another home. For investment properties, a 1031 exchange allows you to defer capital gains by reinvesting in a like-kind property within specific timeframes.
This guide is for informational purposes only and does not constitute tax advice. Consult a qualified tax professional for guidance specific to your situation.
