The exact path depends on how you used the property: personal, investment, rental, or a mix. Many sellers get tripped up by Form 1099-S, which shows gross proceeds rather than taxable gain. Others assume the home-sale exclusion covers them, when it usually doesn't.
This guide covers how to classify the property, calculate adjusted basis and gain, complete the forms, reconcile the 1099-S, and check for exclusions or deferral options. It uses US tax rules, so Australian-based owners of US property should read it with that in mind.
Key Takeaways
- A personal-use second home generally flows from Form 8949 to Schedule D to Form 1040.
- Taxable gain is net proceeds minus adjusted basis, not the 1099-S gross figure.
- Rental use, depreciation, inheritance or a 1031 exchange can change the forms and the maths.
- Check the current-year instructions, because line numbers and thresholds change.
Where Do You Report the Sale of a Second Home on Form 1040?
The chain runs in three steps. Report the transaction on Form 8949, total the results on Schedule D, then carry the net capital gain or loss to Form 1040. For 2025, that is line 7a, "Capital gain or (loss)". Confirm the line against the current-year form.
Start with Form 8949 for the Property Sale Details
Form 8949 columns generally hold these details:
- (a) property description
- (b) date acquired
- (c) date sold
- (d) proceeds
- (e) cost or other basis
- (f) and (g) adjustment codes and amounts
- (h) gain or loss
Residential sales reported on Form 1099-S generally use Box C (short-term) or Box F (long-term).
Form 1099-S Box 2 shows gross proceeds, and seller-paid selling expenses are not subtracted from it. Use adjustment code E (a negative amount in column g) to account for those costs. The 1099-S has no basis box, so you supply basis yourself.
The IRS gives a worked example in its Form 8949 instructions: US$320,000 proceeds, US$100,000 basis, US$20,000 selling expenses and a US$200,000 exclusion. Codes EH with a (US$220,000) adjustment produce US$0 reported gain.
Transfer the Results to Schedule D
Schedule D summarises short-term and long-term gains and losses from Form 8949 and other capital transactions. Parts I and II net each category on lines 7 and 15, and line 16 combines them.
Holding period decides the section. Generally, more than one year is long-term. One year or less is short-term and taxed at ordinary rates.
Carry the Net Amount to Form 1040
Form 1040 receives the net result from Schedule D, not the sale price or the 1099-S gross proceeds. A net loss is subject to annual limits (covered below).
Identify When Another Form May Be Required
| Form | When it applies |
|---|---|
| 4797 | Rental or business-use property, or a separate rental portion |
| 6252 | Installment sale with payments after the sale year |
| 8824 | Qualifying like-kind exchange of business or investment property |
| Schedule E | Ongoing rental income and expenses before the sale |
How to Calculate the Taxable Gain or Loss Before Completing Form 1040
The framework is simple: amount realized (sale price minus selling expenses) minus adjusted basis equals gain or loss. The complications sit inside basis.
Determine the Property's Adjusted Basis
Basis starts with the purchase price plus capitalizable acquisition costs: title and legal fees, recording fees, surveys and transfer taxes. Financing costs and tax or insurance escrow deposits are excluded.
Capital improvements raise basis. Routine repairs generally don't, unless they are part of an extensive remodel. Special situations change the starting point:
- Inherited: generally fair market value at death, which can be higher or lower than the original cost
- Gifted: donor basis generally governs gain, while gift-date value governs loss, so a sale between the two can produce neither
- Divorce transfers: generally no recognized gain, with the original basis carried over
- Casualty and energy credits: reimbursements, deductible casualty losses and applicable energy credits reduce basis
- Depreciation: reduces basis whether or not you claimed it, if it was allowable
Subtract Selling Expenses from the Sale Proceeds
Commissions, advertising and qualifying legal costs reduce the amount realized, which reduces gain. Costs such as mortgage interest or property tax belong elsewhere and don't reduce the gain.
Determine Whether the Gain Is Short-Term or Long-Term
Inherited property generally receives automatic long-term treatment. Exchanged, spousal-transfer and entity-held property can have more involved holding periods, so check IRS Publication 523 for your facts.
Address Losses, Depreciation, and Mixed Use
A loss on a purely personal-use home is nondeductible. Report it with code L on Form 8949. A loss on rental or investment property is treated differently.
Depreciation also changes the result. It reduces basis, can trigger ordinary recapture, and unrecaptured Section 1250 gain is taxed at a maximum 25% federal rate (not a flat 25%).
Which Tax Rules and Additional Forms Apply to a Second-Home Sale?
Start by classifying the property:
- personal vacation home
- rental or investment property
- former primary residence
- mixed-use property
Personal-Use Second Home Versus Rental or Investment Property
Under the IRS vacation-home rules, a dwelling counts as a home for rental-limit purposes if your personal use exceeds the greater of 14 days or 10% of fair rental days. If you rent it fewer than 15 days, rental income generally isn't reported as rental activity.
Prior rental years still matter when you sell. Income and expenses from those years were reported on Schedule E, and depreciation taken reduces basis and can trigger recapture.
The Primary-Residence Exclusion Usually Does Not Automatically Apply
Owning a second home doesn't qualify you for the Section 121 exclusion. You need to have owned and used it as a principal residence for 2 years within the 5 years ending on the sale date.
- Exclusion: US$250,000, or US$500,000 on an eligible joint return
- Frequency: generally unavailable if you excluded another home's gain in the previous 2 years
- Partial exclusion: possible for employment, health or unforeseen circumstances
- Nonqualified use: gain allocated to non-residence periods after 31 December 2008 is generally ineligible
- Depreciation: gain from depreciation after 6 May 1997 can't be excluded
The Misunderstood "Six-Year Rule"
There is no universal US six-year rule making second-home gain tax-free. The phrase often comes from Australian capital gains tax rules, which don't apply to a US return.
The US periods that matter are the two-out-of-five test, the once-every-two-years limit, and a suspension of up to 10 years for eligible military, Foreign Service and intelligence personnel on qualifying duty.
1031 Exchanges and Other Deferral Rules
Since 2018, Section 1031 covers only real property held for business or investment, not a home used for personal enjoyment. The key deadlines are 45 days to identify replacement property and the earlier of 180 days or your return due date to close. These exchanges use a qualified intermediary and are reported on Form 8824.
Deferral isn't elimination. Basis carries into the replacement property, and property acquired in an exchange faces a 5-year Section 121 bar.
Additional Federal and State Tax Consequences
The 3.8% net investment income tax applies to the lesser of net investment income or the amount by which MAGI exceeds the threshold. Excluded Section 121 gain isn't included. IRS guidance sets these thresholds:
| Filing status | MAGI threshold |
|---|---|
| Single / head of household | US$200,000 |
| Married filing jointly | US$250,000 |
| Married filing separately | US$125,000 |
State reporting is separate. Form 1040 doesn't replace a state return for the property's location or your residence.
Foreign individual sellers may need Form 1040-NR rather than 1040, plus FIRPTA withholding-credit documentation (Form 8288-A).
Legal Ways to Reduce or Defer Tax on the Sale
These are options to evaluate before closing. None guarantees zero tax.
Convert the Property to a Primary Residence Only After Reviewing the Rules
Moving in can open some principal-residence treatment, but it doesn't erase nonqualified-use or depreciation limits. In the IRS Publication 523 example, a US$320,000 gain less US$20,000 depreciation leaves US$300,000. Forty percent (US$120,000) is nonqualified-use gain, so only US$180,000 is excluded.
Run a forward-looking tax analysis before moving, because the result depends on the full ownership and use history.
Evaluate a Qualifying 1031 Exchange
This works for property held primarily for business or investment. It does not work for a vacation home you simply enjoy. If you pursue one:
- Use a qualified intermediary
- Meet the 45- and 180-day deadlines
- Have a professional review the structure before you close
Use Capital Losses or Other Planning Tools Where Permitted
Deductible capital losses offset capital gains first. Rules that often matter:
- Excess net loss can offset other income up to US$3,000 (US$1,500 if married filing separately)
- Any remainder carries forward
- Personal-use home losses do not qualify
Before choosing between selling now, holding, renting or transferring, weigh basis, depreciation, financing and estate planning.
Rate brackets also affect timing. For 2026, long-term gains are taxed at 0%, 15% or 20% depending on taxable income. For single filers, the 0% rate applies up to US$49,450 and the 20% rate above US$545,500.
Filing Checklist and When to Seek Professional Help
Gather these before filing:
- Purchase settlement statement and closing statement
- Form 1099-S
- Improvement invoices
- Depreciation schedules and prior returns
- Rental records
- Exchange documents
- Records supporting inherited or transferred basis
Keep basis records until 3 years after the return due date for the sale year.
Then reconcile proceeds and dates across Form 1099-S, Form 8949, Schedule D and any rental or business forms. A mismatch can prompt a CP2000 notice, which proposes changes but isn't a bill. If you need to correct a return, use Form 1040-X.
VJM Global's US tax compliance professionals prepare Form 1040 and 1040-NR returns and can help review complex second-home transactions, including rental use, depreciation, multiple forms and cross-border ownership.
This article is general educational information, not individual tax advice. Consult a qualified tax professional for your filing position, particularly with a large gain, foreign ownership, an amended return or an IRS notice.
Frequently Asked Questions
How do I report capital gains from selling a second home on my Form 1040?
Report the sale on Form 8949, total it on Schedule D, then carry the net result to Form 1040. Rental, business or mixed-use property may require additional forms.
How can I avoid paying capital gains tax on the sale of a second home?
Lawful options include a qualifying primary-residence exclusion, eligible capital-loss offsets or a properly structured 1031 exchange. None applies automatically, and an exchange defers tax rather than eliminating it.
What is the 6 year rule for capital gains?
There is no blanket six-year exemption for US second-home sales. The phrase may refer to residence-use, rental, nonqualified-use or special-service rules, each needing fact-specific analysis.
Do I have to report the sale of a second home if I received Form 1099-S?
Generally yes. Receiving a 1099-S requires reporting even if you believe the gain is fully excluded or zero.
Is the sale of a second home reported on Schedule D?
A personal-use second-home sale commonly flows to Schedule D after Form 8949. Rental, business, installment or exchange transactions may use additional forms before the final result reaches Form 1040.
