6 Tax Rules Every California Home Seller Should Know (2026)

Selling a home in California triggers more paperwork than most sellers expect. Beyond the purchase agreement and disclosures, there are federal tax rules about your gain, a state withholding requirement that can take a bite out of your proceeds at closing, and property-tax rules that may affect what happens next if you're buying another home. None of this is optional, and missing a step can mean an unpleasant surprise months later when a tax bill or notice shows up.

This is a checklist, not a substitute for professional advice. Every seller's situation is different — how long you owned the home, whether it was ever a rental, your filing status, your income, and your county all change the answer. Use this to know which questions to ask, then confirm the specifics with a licensed CPA or tax attorney before you sign anything. If you're weighing a traditional sale against a faster cash-sale route, these same tax rules generally apply either way — the sale mechanics change, the tax treatment of your gain typically does not.

The single biggest tax break for most home sellers is the Internal Revenue Code Section 121 exclusion. If you owned and lived in the home as your primary residence for at least 2 of the last 5 years before the sale, you can exclude up to $250,000 of capital gain from federal income tax if you're single, or up to $500,000 if you're married filing jointly. This is detailed in IRS Publication 523, Selling Your Home (irs.gov).

The 2-out-of-5-year test doesn't require the two years to be continuous, and there are partial exclusions available for sellers who move due to a job change, health issue, or other unforeseeable circumstance, even if they haven't hit the full two years. Gain above the exclusion amount is generally taxed as a long-term or short-term capital gain depending on your holding period.

Practical takeaway: if you've owned and lived in your Sacramento-area home for at least two years and your gain is under the threshold, you likely owe no federal tax on the sale at all. If your home has appreciated significantly — common after years of Northern California price growth — run the numbers early, because gain above $250k/$500k is taxable even though the sale itself isn't reported as ordinary income.

California requires withholding on many real estate sales, separate from federal tax. Under the state's real estate withholding rules, the default withholding is 3.33% of the total sale price, withheld by escrow at closing and remitted to the California Franchise Tax Board using Form 593 (see ftb.ca.gov). This is an estimated prepayment toward your eventual state tax liability, not an additional tax.

Several exemptions can reduce or eliminate this withholding, including a full or partial principal-residence exemption, a sale at a loss, or an installment-sale election. Escrow or the closing agent typically walks sellers through Form 593 as part of the closing package, but it's worth confirming your exemption eligibility ahead of time rather than being surprised by a withheld amount at the closing table.

Practical takeaway: don't assume 3.33% of your sale price disappears permanently. If you qualify for the principal-residence exemption (which most owner-occupied home sales do), little or no withholding may apply — but the paperwork has to be filed correctly to claim it.

When a home sells, the closing agent (usually escrow or title) is generally required to report the transaction to the IRS on Form 1099-S, Proceeds From Real Estate Transactions. A copy goes to the seller and a copy goes to the IRS, so the sale is on the IRS's radar whether or not you owe tax on the gain (irs.gov has details under Form 1099-S instructions).

There is an exception: sellers of a primary residence who certify in writing that the full gain is excludable under Section 121 (the exclusion described above) may not need a 1099-S filed at all, depending on how the closing agent handles the certification. This is a closing-table form, not something you request separately.

Practical takeaway: expect a 1099-S in the mail or in your closing documents if the transaction isn't fully exempt, and keep it with your tax records for the year of sale — even if you ultimately owe nothing, the IRS will be looking for the sale to show up somewhere on your return.

Proposition 19, effective April 1, 2021, changed two things that matter to California sellers. First, homeowners who are 55 or older, severely disabled, or victims of a wildfire or other qualifying disaster can transfer their existing property tax base (their lower assessed value under Proposition 13) to a replacement home anywhere in California, up to three times in their lifetime — a significant expansion from the older Proposition 60/90 rules, which were limited to certain counties and a single transfer. Details are published by the California State Board of Equalization (boe.ca.gov).

Second, Prop 19 tightened the parent-child (and grandparent-grandchild) exclusion that previously let families transfer property between generations without full reassessment. Under current rules, a transferred home generally must become the recipient's primary residence to retain a lower assessed value, and even then a partial reassessment may apply if the home's value exceeds certain limits. This is a narrower exclusion than what existed under the prior Proposition 58/193 rules.

Practical takeaway: if you're 55+ and selling to downsize or relocate within California, ask your county assessor's office about a Prop 19 base-year-value transfer before you close — the paperwork has filing deadlines, and this can meaningfully reduce property taxes on your next home.

If your home was ever rented out, used as a home office, or otherwise depreciated for tax purposes — even for part of the time you owned it — the IRS requires you to "recapture" that depreciation when you sell. Under Section 1250 rules, the portion of your gain attributable to depreciation you claimed (or were entitled to claim) is taxed at a maximum rate of 25%, separate from the standard long-term capital gains rates, as described in IRS Publication 523 and related guidance at irs.gov.

Depreciation recapture applies even to the portion of a sale that would otherwise qualify for the Section 121 primary-residence exclusion — the exclusion does not erase recaptured depreciation. This commonly catches sellers who converted a rental into their primary residence, or who rented out a room or an ADU for a period of time.

Practical takeaway: if any part of your property's history includes rental use, a home-office deduction, or an accessory dwelling unit you depreciated, tell your CPA before you sell. The recapture calculation depends on your depreciation records, and getting it wrong can mean an unexpected tax bill.

If you're carrying financing for the buyer — commonly called an installment sale or seller financing — federal tax law under Internal Revenue Code Section 453 generally lets you report the gain over the years you actually receive payments, rather than all at once in the year of sale. This can smooth out the tax impact of a large gain, particularly on investment or rental property where the full Section 121 exclusion doesn't apply. See irs.gov for installment-sale reporting rules (Form 6252).

Installment sale treatment has its own rules around depreciation recapture (which is generally still taxed in the year of sale, even on an installment basis), interest income on the carried note, and how it interacts with the California withholding described above — Form 593 has a specific installment-sale election.

Practical takeaway: seller financing can be a useful tool for spreading out a tax bill on an investment property sale, but it adds real complexity to your return and carries collection risk if the buyer defaults. This is a strategy to discuss with a CPA before you agree to terms, not something to structure informally.

None of these six rules exist in isolation — your Section 121 exclusion, any depreciation recapture, your withholding exemption status, and a possible Prop 19 transfer all interact on the same tax return. The right move for a primary residence you've lived in for ten years looks very different from the right move for a rental property or a home you inherited.

This article is general information, not tax or legal advice, and tax rules change from year to year. Before you list, sign a purchase agreement, or accept a cash offer, talk to a licensed CPA or tax attorney who can look at your actual numbers — your basis, your holding period, your filing status, and your county — and confirm what applies to your sale.