To buy property tax liens, you locate a county that sells tax lien certificates, pull its published list of delinquent properties, investigate the parcels you’re interested in, register and pre-fund a deposit with the tax office, bid at the auction, pay and record your certificate, and then wait out the state’s redemption period to collect interest or, if the owner never pays, pursue the property through foreclosure. Roughly 30 states allow some form of tax lien certificate sale, with maximum interest rates that run from about 8% to 36% depending on the state. The steps below walk through each part of that process.
Confirm the County Sells Liens, Not Deeds
Not every state uses the same system for delinquent property taxes, and the difference changes what you’re actually buying. In a tax lien state, the county sells the debt: you pay the back taxes, earn interest while the owner has time to repay, and only pursue the property itself if the owner never redeems. In a tax deed state, the county sells the property outright at auction and the winning bidder receives a deed. A handful of states use both or a hybrid.
If you want an interest-bearing investment with the property as backing, tax lien certificates are the product. If a county’s sale is structured as a deed auction, everything in this guide about redemption periods and interest returns won’t apply. Check the county treasurer or tax collector’s website for the exact form of sale before you spend time on due diligence.
Find the Delinquent Property List
Counties that sell tax lien certificates are required by state law to publish lists of delinquent properties before the auction. These lists typically appear in a local newspaper for several consecutive weeks and on the county treasurer’s or tax collector’s website. Each listing includes the owner’s name, the legal description of the land, and the total delinquent amount. Publication usually runs on an annual or quarterly cycle, often 30 to 60 days before the sale.
Start with the county treasurer or tax collector’s website. Some counties post downloadable spreadsheets covering every parcel; others use interactive maps. If the county runs its auction through a third-party online platform, the delinquent list is usually available on that platform once registration opens.
Over-the-Counter Liens
Not every lien sells at auction. Liens that go unsold can often be bought directly from the county afterward, usually at face value plus accrued interest and without competitive bidding. Availability and pricing vary by county, so ask the tax office whether unsold liens are available and how to purchase them. Over-the-counter buys can be a simpler starting point because there’s no auction to win.
Do Your Due Diligence Before Bidding
A tax lien certificate is only as valuable as the property behind it. The auction itself is fast; the real work is what you do before you bid.
- Verify the property exists and has value. Use the county assessor’s records to confirm the parcel has an actual structure or usable land. Liens on landlocked lots, slivers of unusable land, or demolished structures may never be redeemed, and the property itself may be worth less than the taxes owed.
- Search the title. Check for other liens, mortgages, and encumbrances. Federal tax liens, homeowners’ association liens, and utility liens can all complicate your investment. A property loaded with debt may not be worth pursuing even if you eventually foreclose.
- Check for environmental contamination. Under federal law, the current owner of property where hazardous substances have been released can be held liable for cleanup costs regardless of whether that owner caused the contamination. If you eventually take title through foreclosure, you can inherit a cleanup obligation that dwarfs the property’s value. Avoid properties with a history of industrial, manufacturing, or gas station use unless you’ve done a thorough environmental assessment.1Office of the Law Revision Counsel. 42 U.S. Code 9607 – Liability
- Look for existing federal tax liens. If the IRS has a recorded lien against the owner, it may survive a tax sale and stay attached to the property. Whether the federal lien is extinguished depends on whether proper notice was given to the IRS before the sale and whether the foreclosing lien is senior. The federal government also has a right to redeem the property after a sale where a federal lien is at stake; for liens arising under internal revenue laws, the redemption period is 120 days from the date of sale or the period allowed by state law, whichever is longer.2GovInfo. 26 CFR 301.7425-2 – Effect on Liens; Nonjudicial Sales3Office of the Law Revision Counsel. 28 U.S. Code 2410 – Actions Affecting Property on Which United States Has Lien
- Inspect the property, at least virtually. At minimum, use satellite imagery and county records to assess condition, location, and zoning. Physical visits are better on higher-value liens.
Skipping this step is the most common and most expensive mistake new investors make.
Register and Fund Your Bids
Every jurisdiction requires registration before you can bid. Registration typically involves a government-issued ID along with your Social Security Number (for individuals) or Employer Identification Number (for business entities). Most counties also require a completed IRS Form W-9 so they can report any interest income you earn.4Internal Revenue Service. Instructions for the Requester of Form W-9
You’ll fill out a registration form listing your contact information and the exact name that should appear on any certificates you win. Some jurisdictions require a signed statement confirming you have no outstanding tax debts in that county. Forms are usually available through the county’s online portal or at the treasurer’s office.
You’ll also need cleared funds before the auction begins. Accepted payment methods typically include cashier’s checks, certified checks, money orders, and wire transfers. Personal checks are almost never accepted. Many counties require a pre-auction deposit to prove you can cover your bids, sometimes a flat dollar amount and sometimes a percentage of your planned bidding total. These funds must be verified by the auction administrator before bidding opens, and failing to provide them disqualifies you. Plan to have documentation and funding finalized several days ahead of the sale.
Some investors register and buy through an LLC rather than personally, mainly for liability separation if a property later triggers a legal or environmental claim. That path adds formation paperwork, a separate EIN, and separate books. Whether it’s worthwhile depends on the size of the portfolio you’re building.
Understand the Auction Format
Mechanics vary by jurisdiction, but most counties use one of a few standard formats. Knowing which one you’re walking into changes how you set your limits.
Bid-Down Interest
The most common format in states with high statutory rates starts at the maximum rate allowed by law and works downward. Bidders compete by offering to accept a lower interest rate on their investment, and the person willing to take the lowest rate wins the certificate. In a state with an 18% maximum, bidding might begin at 18% and drop in half-percent increments until only one bidder remains.5Florida Legislature. Florida Statutes 197.172 – Interest Rate; Calculation and Minimum In popular counties, competition often pushes the winning rate well below the statutory cap.
Premium Bidding and Other Formats
In premium-bidding jurisdictions, investors compete by offering cash above the actual tax debt to secure the lien. The premium sometimes earns interest, but in many cases it’s not refundable and earns nothing, which reduces your overall return. Other counties use rotational or random selection, assigning liens to registered bidders in sequence to keep any single investor from sweeping the inventory.
Online vs. In-Person
Many counties now run auctions through online platforms where bids are submitted electronically within a timed window. Online systems often let you set a maximum bid or a budget cap and stop bidding on your behalf once your limit is reached. Traditional in-person auctions at the courthouse still exist in some areas. Either way, bidding continues until every delinquent parcel has been addressed or the window closes.
Pay and Record After You Win
Once you win a lien, pay in full and pay quickly. Many counties require payment on the same day the auction closes, immediately after the sale ends, using the same cashier’s checks, certified checks, cash, or wire transfers accepted for deposits. Missing the payment window forfeits your winning bid and can bring penalties or a ban from future auctions.
After payment clears, the county issues your tax lien certificate as either a physical document or a digital record. You’re responsible for recording it with the county recorder or clerk of court to create a public record of your interest. Recording fees vary by jurisdiction, typically from a small flat charge to several tens of dollars per document. Recording matters because it puts other creditors and potential buyers on notice that your lien exists.
Wait Out the Redemption Period
After purchase, the property owner enters a redemption period set by state law, during which they can pay the delinquent taxes and reclaim clear title. Redemption periods run anywhere from six months to four years depending on the state. When the owner redeems, you get your original investment back plus interest at the rate set during the auction or a fixed statutory rate, and in some states additional penalty charges. The county treasurer collects the redemption payment and forwards it to you by check or electronic transfer. Once that happens, your certificate is canceled and the lien comes off the property’s title.
Subsequent Taxes
While you hold the certificate, the property can rack up more delinquent taxes in future years. In many states, the lien holder has the right, and sometimes the obligation, to pay those subsequent taxes to protect their position. If you don’t keep up, some jurisdictions reduce or eliminate your lien priority, which can wipe out your investment. Amounts you pay toward subsequent taxes are typically added to what the owner must pay to redeem. Check the specific rule in your jurisdiction, because consequences range from losing priority to forfeiting the certificate entirely.
If the Owner Never Redeems
When the redemption period ends without payment, you generally have the right to start a foreclosure process to obtain the property. It isn’t automatic. You have to take affirmative legal steps, and they vary by state. Some jurisdictions have you apply to the county for a tax deed; others require a foreclosure petition in court. Either route involves filing fees, legal notice requirements, and potentially attorney fees.
Before foreclosure can proceed, the owner and other interested parties, including mortgage holders and other lien holders, must receive proper legal notice. Constitutional due process requires a meaningful opportunity to pay before losing the property, so notice typically includes certified mail to the owner and publication in a local newspaper. Cutting corners on notice can invalidate the whole foreclosure.
Even after a completed foreclosure, the title you receive from a tax sale may not be fully clear. Other liens, ownership disputes, or procedural defects can cloud it, and many investors file a quiet title action to establish ownership free of competing claims before they can sell or finance the property. That adds time and legal expense.
Reporting the Interest You Earn
Interest from redeemed tax lien certificates is taxable income, which is why counties collect a W-9 during registration.4Internal Revenue Service. Instructions for the Requester of Form W-9 When a county pays you $10 or more in interest during the year, it’s required to report the amount to the IRS on Form 1099-INT and send you a copy.6Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID You report the interest on your federal return whether or not the 1099-INT arrives; the reporting obligation is yours either way.
If you buy through an LLC, interest flows through to your personal return for a single-member LLC or is reported on the entity’s return for multi-member LLCs and corporations. Keep detailed records of every certificate purchased, every interest payment received, and any expenses tied to your lien investments, since some costs may be deductible against your investment income.