US tax sale properties are sold by counties when owners fail to pay property taxes. Some states sell tax lien certificates (the investor earns interest until the owner redeems), while others sell tax deeds (the property itself) or redeemable deeds (a deed subject to a redemption penalty). Minimum bids, interest rates (commonly 12–18%), and redemption periods vary by state — creating investment opportunities at or below taxes owed.
How Tax Sales Work in the US
A tax sale occurs when a US county sells a tax-delinquent property owner's real estate — or the right to collect their unpaid taxes — to recover what is owed. The process is governed by state law, so rules differ significantly from state to state. Understanding which system a state uses is the first step for any investor.
The Three Tax Sale Systems
| System | What you buy | How you profit | Example states |
|---|---|---|---|
| Tax Lien Certificate | The unpaid taxes (a lien) | Interest (often 12–18%); foreclose if unredeemed | AZ, FL, IL, NJ, IA, MD |
| Tax Deed | The property itself | Acquire property at a discount; usually no redemption | CA, PA (judicial), WA |
| Redeemable Deed | A deed subject to redemption | A penalty if redeemed, or the property | TX (25%), GA (20%) |
See our full comparison: Tax Deed vs. Tax Lien.
What Triggers a Tax Sale?
When a property owner falls behind on property taxes, the county begins a formal collection process. A typical timeline:
- Taxes become delinquent — interest and penalties begin accruing
- The county advertises the delinquency and schedules a sale (a lien auction or a deed/foreclosure sale)
- The owner is given time to pay (a redemption period before or after the sale, depending on the state)
- If unpaid, the property or lien is sold at public auction — increasingly online
What is the Minimum Bid?
The minimum (opening) bid is not market value. It is generally calculated as:
- All delinquent property taxes
- Plus accrued interest and penalties
- Plus the county's legal and administrative costs
Because the minimum is tied to taxes owed, winning bidders can sometimes acquire property far below market value — though competitive deed auctions often bid the price up toward market value.
How Bidding Works
Bidding methods vary by state and sale type:
| Method | How it works | Where |
|---|---|---|
| Bid down the interest rate | Investors accept progressively lower interest; lowest rate wins the lien. | Arizona, Florida |
| Penalty / premium bidding | Bid down a penalty (IL) or up a cash premium (NJ) once the rate hits zero. | Illinois, New Jersey |
| Highest-price auction | Open ascending bids; the highest bidder wins the deed. | California, Texas, Georgia, Pennsylvania |
Redemption Periods Vary by State
The redemption period is critical — it is when the owner can pay to keep or reclaim the property.
| State | System | Redemption |
|---|---|---|
| Florida | Lien → deed | 2 years (lien); none after deed issued |
| Arizona | Tax lien | 3 years, then judicial foreclosure |
| Texas | Redeemable deed | 6 months (2 years homestead/ag), 25–50% penalty |
| Georgia | Redeemable deed | 12 months, 20% premium, then barment |
| California | Tax deed | Ends before the sale; none after |
| New York | In rem foreclosure | ~2 years (county-set); ends at judgment |
How to Participate in a Tax Sale
- Monitor listings — Track county sources or use taxsalesportal.com to find new listings
- Identify the sale type — Confirm whether the county sells liens, deeds, or redeemable deeds, and the auction format
- Conduct due diligence — Order a title search, check for surviving liens (e.g. IRS), confirm access and zoning (see our Due Diligence Guide)
- Register to bid — Most counties require pre-registration and a deposit; some require a no-delinquent-taxes affidavit
- Set your maximum — Base it on comparable sales minus costs minus margin, and never exceed it
- Bid — Live or online; lien auctions may bid down the rate, deed auctions bid up the price
- Pay promptly — Usually immediately or within a short window in cash or certified funds
- Get your certificate or deed — Clear, insurable title may require a quiet title action
Key Risks in Tax Sale Properties
- No inspection right — You generally cannot inspect occupied properties before bidding
- Surviving liens — IRS liens (with a 120-day right), some municipal/HOA or special-assessment liens may survive
- Environmental liabilities — Contamination and cleanup obligations can transfer with the property
- Unknown condition — Interior condition, structural issues, and repairs are often unknown
- Redemption — In lien and redeemable-deed states, your return may be interest/penalty rather than the property
- Title work — A tax deed often needs a quiet title action before it is marketable or insurable
💡 Investor Tip: Always order a title search before bidding. It can reveal deal-breaking liens — and check specifically for IRS federal tax liens, which can survive a tax deed. Set a firm maximum bid before you start; emotional bidding is how you overpay.
State-Specific Guides
- Florida Tax Sales Guide — tax lien certificates and county Clerk of Court tax deed auctions
- Texas Tax Sales Guide — redeemable deeds and first-Tuesday sheriff/constable auctions
- Georgia Tax Sales Guide — redeemable deeds, the 20% premium, and barment