Tax Implications of Selling a House Below Market Value in California
A below-market sale to an arm’s-length buyer typically means a smaller gain and less tax exposure. The IRS calculates gain based on what you received, and a lower sale price means the number going into that calculation is smaller.
Two variables determine how this gets treated for tax purposes: who you’re selling to and whether the property was a rental. A sale to a family member pulls in gift tax rules the IRS doesn’t apply to arm’s-length sales, and a rental has a depreciation calculation sitting in the mix that primary residence sellers don’t run into.
When the Buyer Has No Connection to You
What the IRS Calculates
When the sale is between strangers, a below-market price typically means less gain going into the tax calculation rather than more tax exposure. The IRS calculates gain on what you received, and a lower sale price just gives that calculation a smaller number to work with.
A seller who accepts $300,000 on a property with a $200,000 adjusted basis has a $100,000 gain to account for, and accepting more wouldn’t change the calculation structure, just the resulting number.
The Primary Residence Exclusion Still Applies
Sellers have called assuming the primary residence exclusion disappears when they accept a below-market offer, but it doesn’t if they otherwise qualify. Under IRS Publication 523, if you’ve owned and lived in the property as your main home for at least two of the five years leading up to the sale, you can exclude up to $250,000 of gain filing single or up to $500,000 married filing jointly.
A below-market price doesn’t change whether you qualify for that exclusion, and sellers who do qualify usually find the gain that’s left over is smaller than they expected once they run the number.
Adjusted Basis and Selling Costs
Sellers often underestimate how much the adjusted basis and capital improvements reduce the taxable gain. Selling costs come off that number too, and a CPA who tracks those carefully usually arrives at a taxable figure that’s been reduced from several directions.
The closing cost tax deduction breakdown covers what the IRS counts toward reducing the gain, including what adjusts the basis instead of deducting directly.
When the Property Is a Rental
A lot of the sellers we work with are landlords, and the tax calculation on a rental doesn’t work the way it does on a primary residence.
Depreciation Recapture
The $250,000 and $500,000 primary residence exclusions aren’t available, so whatever gain comes out of the sale runs fully through the calculation. If you’ve been depreciating the property, the recaptured depreciation gets taxed at up to 25% under IRS Publication 527, separately from the capital gains rate that applies to the rest of the gain.
Landlords come in assuming a below-market sale price was going to cut their tax bill meaningfully, and then their CPA walks them through what actually happened.
A landlord who’s been depreciating the property for fifteen years carries a recapture number tied to the total depreciation claimed, and the purchase agreement price isn’t what drives that figure. I’ve seen landlords come in focused on the sale price and not realize the recapture number has been building for the entire time they owned the property.
Related Party Sales
For landlords where the buyer is also a family member, there’s IRS territory most people haven’t dealt with before. Section 267 covers related party transactions, and one of the things it does is disallow losses on sales to close relatives, so if you’re selling a rental property at a loss to a family member, that loss generally can’t be claimed under the related party rules.
There are also rules around installment sales to related parties that can pull forward when gain gets recognized, and those details aren’t in the escrow paperwork. I’d tell any landlord dealing with that combination to get a CPA in front of the deal early, when there’s still room to set the structure up right.
Under IRC § 453(e), if you sell to a related party on an installment basis and they resell within two years, the IRS pulls the deferred gain forward into the year of that resale. Most sellers setting up an installment sale for a family member haven’t been told that the deferred gain timeline depends on what the buyer does next.
When the Buyer Is a Family Member
Gift Tax Territory
Sellers call thinking they’re doing a family member a favor by pricing a house well below what it was worth, and then find out the IRS was going to have questions about it. If the price you charged is significantly below what the property would sell for on the open market and there’s no clear economic explanation for the gap, the IRS may treat part of the difference as a gift rather than a sale price.
Most sellers I’ve talked to who priced a family sale below market don’t realize the discount they were offering had already pushed past the $19,000 annual gift tax exclusion per recipient. If the discount runs above that amount, you’d typically need to file a gift tax return with the IRS, which doesn’t automatically mean tax is due right away.
Documentation and Timing
Amounts above the annual exclusion typically roll against the lifetime gift and estate tax exemption rather than triggering a bill right away. The documentation requirements go up once that happens, and the way you set the transaction up going in shapes what you need to report and how.
I’d tell anyone in this situation to have a CPA in the room before you sign anything. Once the structure is in, it’s difficult to adjust without reopening documentation the IRS already has.
What California Does on Property Taxes
How Assessors Handle Below-Market Purchases
I spent seven years as a certified residential appraiser before I started buying houses, starting in 2003, and the question I got wrong early on was assuming a below-market purchase price would set a lower property tax bill for whoever was buying.
County assessors in California have tools to reassess toward current fair market value at the point of ownership transfer per California Board of Equalization guidelines, and the purchase price on the paperwork isn’t what they’re working from. Assessors commonly come back with numbers well above what was on the purchase agreement, and I’ve had buyers reach out after getting that first reassessment notice who had no idea it was coming.
Proposition 19 and Family Transfers
Proposition 19, effective February 2021, added another layer for family transfers. Under Prop 19, a parent-to-child transfer only preserves the lower assessment if the child moves in as a primary residence, and for any other transfer the assessor reassesses to market value at the point of transfer regardless of what the deed showed as the price.
In areas like Orange County, where a parent’s assessed value might reflect a purchase from decades ago, the difference between the old assessment and current market value on a below-market family transfer can run into the hundreds of thousands. A buyer who takes over on a below-market family transfer and skips the primary residence requirement typically sees the property reassessed at full market value the first tax cycle after the transfer.
What to Keep on Record
I had a seller reach out a couple years after we’d closed, trying to pull together documentation for a transaction that was getting a closer look than she’d expected. The escrow paperwork was there, but nothing that explained why the price landed where it did, and by then we were trying to reconstruct a conversation from somebody’s kitchen two years earlier.
Escrow documents alone don’t establish why the price landed where it did. An appraisal from around the time of the sale carries a lot of weight, along with a written record of whatever drove the discount.
On family sales, I’ve seen the documentation issue resurface years later, usually when the buyer goes to sell and their CPA starts asking about basis. At that point everyone is trying to reconstruct something that should have been written down when they were all still in the same room.
Two Sellers Who Chose a Direct Sale
Hemlock Drive, Green Valley Lake
In October 2019 we closed on a property on Hemlock Drive in Green Valley Lake for $230,000. The preliminary title report showed several large liens that had to be cleared before the title could transfer.
Those liens came out of the sale proceeds at closing, so the net she walked away with was lower than what the contract showed. A conventional listing with a financed buyer wasn’t going to move on a schedule that worked for her, and a cash offer let her get to closing without the process stretching into something she couldn’t control.
The liens clearing through escrow reduced her actual proceeds, which meant the gain got calculated on the net amount rather than the $230,000 contract price, and that’s the number that goes on the tax return.
Monterey Avenue, San Bernardino
In March 2023 we closed on a property on Monterey Avenue in San Bernardino for $190,000. The sellers were managing the sale from Manteca, about six hours away, and there was a family member still living in the property who made the whole situation more complicated to coordinate.
We handled the coordination on the ground and the occupancy situation got sorted before close. The sellers signed electronically and received their proceeds without coming back to California once.
Their situation was an arm’s-length sale between strangers, so the discount didn’t pull in gift tax territory. The gain they’d report was calculated on the $190,000 they received.
Getting a Number and Knowing Where You Stand
We’ve been on the buying side of over 400 transactions in Southern California since 2008. We’re a cash buyer, and our offers come in below what you’d likely net through a traditional listing.
Cash offers come in below list-ready value, but carrying costs and commission narrow the spread. The agent vs. investor comparison covers where each option tends to come out ahead.
If there’s a family member in the picture, or a discount that didn’t come from property condition or the seller’s timeline, get a CPA involved before you close. Most people who reach out after the fact are trying to undo a structure that a CPA would have handled cleanly before they signed.
The number the tax calculation starts from is what sellers net after all costs in California. On deals with liens or occupancy complications, that net runs meaningfully below the contract price.
If you want to know what your property would net in a cash sale, call us at (951) 331-3844 or request an offer through our website and we can have a number in front of you within 24 hours.
Doug Van Soest spent seven years as a certified residential appraiser starting in 2003 before co-founding SoCal Home Buyers with his wife Andrea Van Soest, CA DRE #01505854. Together they have closed over 400 transactions across Southern California.
