California tax sales are public auctions run by county tax collectors to transfer ownership of properties whose owners have fallen years behind on property taxes. The rules are set by the state Revenue and Taxation Code, and they decide three things that matter most: when a parcel becomes eligible for auction, how long the owner has to pay up and stop the sale, and what the winning bidder actually receives. Get those three right and the rest of the process makes sense.
When a Property Can Be Sold
Property taxes become delinquent if unpaid as of July 1 following the tax year, and the parcel is then classified as tax-defaulted. Default alone is not enough to trigger an auction. The tax collector gains authority to sell only after the property has been tax-defaulted for at least five years and has not been redeemed.1California Legislative Information. California Revenue and Taxation Code RTC 3691
Nonresidential commercial property is the main exception. It can be sold after just three years of tax default.1California Legislative Information. California Revenue and Taxation Code RTC 3691 The statute defines that category by exclusion: everything except single-family and multifamily residences (including land zoned residential) and agricultural land used for commercial crops. A vacant commercial lot or an industrial building can therefore reach auction faster than a house or a farm. Counties can also adopt a resolution applying the longer five-year period to commercial property if they choose.
If a property was damaged in a declared disaster area and has not been substantially repaired, the five-year clock pauses, and the tolling continues until five years have passed from the date the damage occurred.1California Legislative Information. California Revenue and Taxation Code RTC 3691
Before any sale moves forward, the tax collector must also obtain written approval from the county board of supervisors.2California State Controller. Chapter 7 Tax Sales Frequently Asked Questions
Stopping the Sale: The Right of Redemption
If you own a tax-defaulted property, you can stop the auction entirely by paying all defaulted taxes, penalties, fees, and costs. This right of redemption stays alive until 5:00 p.m. on the last business day before the sale date.3San Diego County Treasurer-Tax Collector. Right of Redemption
The cutoff is absolute. Payments postmarked on time but received after the deadline are not accepted, so a mailed redemption needs to arrive well ahead of the due date. Once redemption closes, the parcel enters the auction pool, and the only way to get it back is through post-sale legal challenges, which are far harder and less certain than paying the bill on time.
What the Tax Deed Gives the Buyer
A California tax deed conveys title free of most encumbrances that existed before the sale. Mortgages, judgment liens, and child support liens are wiped out.4San Diego County Treasurer-Tax Collector. Information for Bidders That clean-slate effect is a large part of why tax sales attract investors.
A long list of encumbrances survives, however, and any one of them can turn a cheap purchase into an expensive problem. Under Revenue and Taxation Code Section 3712, the following are not extinguished:
- Future property tax and special assessment installments that become payable on the secured roll after the sale date.
- Easements and restrictions of record, including utility easements, access rights, deed restrictions, and water rights held separately from title.
- Federal IRS liens, where federal law does not discharge them through the sale. The tax collector must notify the IRS beforehand, but the lien can still survive even with notice.
- Unpaid Mello-Roos special taxes not satisfied by the sale proceeds or being collected through a separate foreclosure action.
- Unpaid assessments under the Improvement Bond Act of 1915 not covered by the sale proceeds.
- Liens of any taxing agency that did not consent to the sale.
Building and zoning code violations also carry over. If the property has outstanding code enforcement orders, the new owner inherits the obligation to bring it into compliance.4San Diego County Treasurer-Tax Collector. Information for Bidders
The IRS 120-Day Redemption Right
Federal tax liens deserve special attention. When property is sold to satisfy a lien that is senior to a federal tax lien, the IRS has the right to redeem the property within 120 days of the sale, or the period allowed under state law, whichever is longer.5Office of the Law Revision Counsel. 26 USC 7425 – Discharge of Liens If the IRS exercises that right, the buyer is reimbursed the purchase price but loses the property. Check for recorded federal tax liens before bidding on any parcel.
Preparing to Bid
Each county tax collector publishes a list of tax-defaulted properties scheduled for the upcoming auction. The lists usually appear on the county’s website several weeks before the sale and include parcel numbers, assessed values, and minimum bids. Pulling the list early leaves time for research at the county recorder’s office, where you can check for surviving easements, pending litigation, and other recorded encumbrances.
Registration requires personal and financial identification. Expect to provide a Social Security Number or Employer Identification Number for federal tax reporting, along with vesting information that specifies how you will hold title if you win. The vesting language goes directly onto the deed, so get it right the first time.
Most counties require a deposit before bidding opens. Some set a flat amount; others calculate the deposit as a percentage of the bidding limit you set. Check your county’s terms well in advance, because the deposit usually must clear before the auction opens. If you win nothing, the deposit is refunded after the auction concludes.
The Auction and Payment
California tax sales are public auctions, increasingly run through online platforms. Each parcel opens at a minimum bid that covers all unpaid taxes, penalties, interest, and administrative costs, and the law requires the minimum to be at least the total amount needed to redeem the property, plus costs.6California State Controller. Public Auctions and Bidder Information2California State Controller. Chapter 7 Tax Sales Frequently Asked Questions Bidders compete in pre-set increments until no higher offer is placed.
Anyone can bid regardless of any prior interest in or lien on the property, with one exception: the current owner cannot buy their own property for less than the minimum bid.2California State Controller. Chapter 7 Tax Sales Frequently Asked Questions Once the highest bid is accepted, the transaction is binding.
After winning, you typically have a short window to submit the full payment in guaranteed funds such as wire transfers or cashier’s checks. The exact deadline and accepted methods vary by county, so read the terms published for the specific auction. Failure to pay in time generally means forfeiting your deposit and losing the property, which may be offered to the next highest bidder or relisted later.
After the Sale: Deed, Title Insurance, and Quiet Title
Once the tax collector receives full payment, the collector executes a deed to the purchaser at no additional charge, and the deed is recorded with the county recorder.7California Legislative Information. California Revenue and Taxation Code RTC 3708 Upon recording, the former owner and anyone else with title of record lose all legal and equitable interest in the property. Plan for several weeks between the auction date and the recorded deed arriving in the mail.
A tax deed is not a grant deed or warranty deed. The tax collector makes no warranties about the condition of title. You take whatever interest the government can convey, and the burden of researching title defects falls entirely on you.
That burden shows up quickly if you want to resell or borrow against the property. Most title insurers will not issue a policy on a tax sale property for at least one year after the deed is recorded,8Sonoma County. Tax-Defaulted Property Auctions FAQs and even after that waiting period, many insurers require a quiet title action before issuing coverage. A quiet title action is a lawsuit asking a court to declare your ownership valid and free of competing claims. Without it you may hold a deed that is technically valid but practically unmarketable, because no title company will insure it and no lender will mortgage against it. If you plan to resell or finance, budget for a quiet title action from the start.
Excess Proceeds for Former Owners and Lienholders
When a property sells at auction for more than the amount needed to cover the tax debt and costs, the difference is called excess proceeds. Former owners and lienholders have a legal right to claim that surplus, but the deadlines are tight.
Any party of interest may file a claim within one year of the date the tax collector’s deed is recorded. There are no exceptions, and the claim must be postmarked on or before the expiration date. Claims are paid in a set priority order: recorded lienholders first, then persons who held title at the time of the sale.9California Legislative Information. California Revenue and Taxation Code RTC 4675
When excess proceeds exceed $150, the county must notify all parties of interest of their right to claim, and that written notice must be mailed within 90 days of the sale.10California State Controller. Excess Proceeds Guide Do not wait on that letter. If the county cannot locate your current address, it can satisfy the notice requirement through newspaper publication, and the one-year clock runs regardless of whether you ever see the notice.
County counsel reviews the claims. After the one-year claim period closes and claims are approved, expect the county auditor to issue payment roughly 90 days later.
Challenging a Completed Sale
If a property should not have been sold, state law provides two avenues for challenge, both with tight timelines.
Petition to the Board of Supervisors
The first step is a petition to the county board of supervisors to rescind the sale, filed within one year of the date the tax collector’s deed was executed.11California Legislative Information. California Revenue and Taxation Code RTC 3725 The board can rescind with the written consent of both the county legal adviser and the purchaser. If the purchaser refuses to consent, the board can still proceed by scheduling a hearing and giving the purchaser at least 45 days’ notice by certified mail.12California Legislative Information. California Revenue and Taxation Code RTC 3731 When a sale is rescinded, the purchaser receives a refund of the purchase price plus interest at the county pool rate.
Court Action
If the board declines to rescind, the petitioner can go to court, but only after exhausting the board process. No court proceeding can be brought without that prerequisite. The lawsuit must then be filed within one year of the board’s determination.11California Legislative Information. California Revenue and Taxation Code RTC 3725 The usual tolling provisions in the Code of Civil Procedure do not apply, so extensions based on disability or absence from the state will not save a late filing.
For buyers, that framework explains the meaningful window after purchase during which ownership can be contested, and it explains why title insurance on a fresh tax deed is so hard to obtain.