Tax liens and tax deeds in real estate are the two tools local governments use to collect unpaid property taxes, and they produce very different outcomes. A tax lien is a legal claim against the property for the delinquent amount, often packaged as a certificate that investors buy and earn interest on. A tax deed is the actual transfer of the property to a new owner once the debt goes unresolved past a redemption deadline. Interest rates on tax liens run anywhere from 8% to 36% depending on the state, and redemption windows range from six months to four years.
How a Tax Lien Works
A tax lien attaches to your property automatically the moment the property tax bill goes unpaid. There is no separate notice creating it; it arises by operation of law. The lien takes priority over nearly all other debts on the property, including most mortgages and judgment liens. That super-priority is why lenders usually collect property taxes through escrow rather than let a homeowner pay them directly.
Many jurisdictions sell these liens to private investors as tax lien certificates. The certificate represents the delinquent taxes plus accrued interest and penalties. Buying it is not buying the property. The investor is paying the tax bill on the government’s behalf and earning statutory interest until the owner catches up. Rates vary sharply by state: some sit around 8% to 10%, others allow 18%, 24%, or 36%.
During the redemption period, the owner keeps possession and can pay off the debt to clear the lien. If they redeem, the certificate holder gets their money back plus interest. If the deadline passes without payment, the certificate holder can move to convert the lien into a tax deed.
How a Tax Deed Works
A tax deed transfers ownership. Once the redemption period expires with the taxes still unpaid, the government or the lien holder can push the property through a tax deed sale that extinguishes the former owner’s rights and vests fee simple title in the new deed holder. Some states skip the lien certificate step entirely and run straight to a deed sale after a waiting period; others require the lien process first.
A tax deed generally wipes out most subordinate encumbrances, including mortgages, judgment liens, and mechanics’ liens. Federal tax liens are the major exception, and they deserve their own look.
The IRS Right of Redemption
When a property owner owes back federal income taxes, the IRS holds its own lien against the person’s property, arising automatically once the tax is assessed and demand goes unpaid.1Office of the Law Revision Counsel. 26 USC 6321 – Lien for Taxes Federal law gives local property tax liens priority over the IRS lien where state law treats property tax liens as senior, which is the norm.2Office of the Law Revision Counsel. 26 USC 6323 – Validity and Priority Against Certain Persons So the tax sale can proceed even with an IRS lien on the property.
The problem is what comes after. The IRS has 120 days from the sale date to redeem the property, or the full redemption period allowed under state law, whichever is longer.3Office of the Law Revision Counsel. 28 USC 2410 – Actions Affecting Property on Which United States Has Lien If it exercises that right, it reimburses the purchaser the amount paid at the sale plus interest and allowable expenses, and takes the property. For investors, a property with a known federal tax lien carries real risk that the purchase gets unwound within a few months. A title search that turns up a federal tax lien should change your bid or send you elsewhere.
What Happens to Surplus Sale Proceeds
If a tax sale brings in more than the delinquent taxes, interest, penalties, and costs, the former owner has a constitutional right to the difference. The U.S. Supreme Court settled this in 2023 in Tyler v. Hennepin County. A 94-year-old woman owed roughly $15,000 in delinquent taxes. The county seized her condominium, sold it for $40,000, kept the entire $25,000 surplus, and gave her nothing. The Court unanimously ruled that keeping the surplus was an unconstitutional taking under the Fifth Amendment.4Supreme Court of the United States. Tyler v. Hennepin County, Minnesota
A government can take what you owe, but it cannot take more. Many jurisdictions have updated their procedures since the ruling, but some still require the former owner to affirmatively file a claim to receive excess proceeds. If you’ve lost a property to a tax sale, ask the county treasurer or clerk what the property sold for and whether there are surplus funds to claim.
Protections for Property Owners
Due Process Notice
Before your property can be sold for unpaid taxes, the government has to make a reasonable effort to notify you personally, not merely publish a legal notice. The Fourteenth Amendment standard requires notice “reasonably calculated, under all the circumstances, to apprise interested parties of the pendency of the action.” A sale carried out without adequate notice to the owner or to recorded lienholders can be challenged.
Active-Duty Servicemembers
The Servicemembers Civil Relief Act caps interest on unpaid property taxes owed by an active-duty servicemember at 6% per year, no matter what the local statutory rate would otherwise be, and bars additional penalties for nonpayment during service.5Office of the Law Revision Counsel. 50 USC 3991 – Taxes Respecting Personal Property, Money, Credits, and Real Property The protection is not automatic. The servicemember has to notify the taxing authority in writing and provide a copy of their orders. Investors should know that buying a lien or deed on property owned by an active-duty servicemember can trigger extra legal complications, up to voiding the sale if procedures weren’t followed.
Bankruptcy
Filing bankruptcy triggers an automatic stay that halts most collection actions, including enforcement of a tax lien, so a pending tax sale will generally be postponed while the case is active. The stay is not a full shield, though. The bankruptcy code specifically allows taxing authorities to keep creating and perfecting ad valorem property tax liens for taxes coming due after the petition is filed.6Office of the Law Revision Counsel. 11 USC 362 – Automatic Stay Bankruptcy buys time; it doesn’t erase the underlying tax debt.
Due Diligence Before Buying at a Tax Sale
Title Search
A title search is the single most important step before bidding, and skipping it is the most expensive mistake new investors make. You need to know what liens will survive the sale, whether there’s a federal tax lien (with its 120-day IRS redemption right), whether utility liens or special assessments attach, and whether any unrecorded interests might surface later. The auction list from the tax collector gives parcel numbers and minimum bids and nothing else about encumbrances.
Most title insurers will not issue a policy on a tax deed property without a quiet title action first. That’s a lawsuit asking a court to declare your title valid against all other claims, and it’s effectively a prerequisite for reselling to a conventional buyer or borrowing against the property. Costs typically run $1,500 to $5,000 and the process takes several months. Build that into your maximum bid before the auction, not after.
Environmental Liability
Under federal environmental law, current owners of contaminated property can be held liable for cleanup costs even if they didn’t cause the contamination. The available protection is qualifying as a “bona fide prospective purchaser,” which requires proper pre-purchase environmental inquiries and reasonable steps to address known contamination after buying.7Office of the Law Revision Counsel. 42 USC 9601 – Definitions Even then, EPA can place a “windfall lien” on the property if a government-funded cleanup increases its value.8US EPA. Bona Fide Prospective Purchasers
A Phase I Environmental Site Assessment is the standard pre-purchase inquiry, but on a property selling for a few thousand dollars, the assessment can cost more than the parcel. At a minimum, search the EPA database for known contaminated sites and check historical use through aerial photographs and public records. Former gas stations, dry cleaners, and industrial sites are the highest-risk parcels at tax auctions.
Physical Condition
Tax sale properties sell as-is, and most jurisdictions give you no right to enter or inspect the interior before bidding. Diligence is limited to a drive-by, aerial imagery, and building permit records. Structural problems, mold, and failed mechanical systems don’t show from the curb but can cost tens of thousands to fix. Long-vacant properties, common on delinquent tax rolls, deteriorate fast in harsh climates. Leave a contingency in your maximum bid for what you can’t see.
The Auction Itself
Every tax sale requires advance registration, usually days to weeks before the auction. You’ll provide identifying information including a taxpayer ID, pay a registration fee, and in some jurisdictions certify that you don’t owe delinquent taxes yourself. Many counties handle registration online through the treasurer, tax collector, or clerk.
Bidding formats vary. In a bid-down-interest auction, the auctioneer starts at the maximum statutory rate and bidders compete by accepting lower rates of return; the lowest rate wins the certificate. In a premium bidding auction, bidders offer amounts above the delinquent tax balance and the highest bid wins. Some jurisdictions use random selection or rotational assignment. Knowing your local format is essential because it drives your entire return calculation.
Payment is typically due immediately or within 24 hours, in certified funds. Personal checks and credit cards are almost never accepted. Once payment clears, the certificate or deed is recorded in the county land records.
One warning about behavior on the auction floor. Agreements among bidders to suppress competition are prosecuted as violations of the Sherman Antitrust Act. An individual convicted of bid-rigging faces up to 10 years in federal prison and a fine of up to $1 million, which courts can increase to twice the gain from the scheme or twice the victim’s loss.9Office of the Law Revision Counsel. 15 USC 1 – Trusts, Etc., in Restraint of Trade Illegal The Department of Justice has actively prosecuted tax lien auction conspiracies and secured guilty pleas from investors and executives who agreed to rig bids at municipal auctions.10United States Department of Justice. Six Investors Indicted for Their Roles in Bid-Rigging Scheme at Municipal Tax Lien Auctions If someone at an auction proposes splitting properties or taking turns winning, walk away and report it.
After the Sale
If You Hold a Lien Certificate
Your job is to wait and monitor. Most tax lien purchases end in redemption: the owner pays the delinquent taxes plus your earned interest, and you get your investment back with the statutory return. Track the redemption deadline and stay in contact with the tax collector, because some jurisdictions require the certificate holder to affirmatively apply for a tax deed once the redemption period closes. Missing that window can cost you the whole investment.
If You Hold a Tax Deed
Holding a tax deed doesn’t mean you can change the locks. If someone is occupying the property, you have to go through the formal eviction process for your jurisdiction, typically an unlawful detainer action. Removing occupants yourself, cutting utilities, or otherwise forcing them out without a court order creates real liability. From recording the deed to physical possession usually takes 30 to 90 days without complications. Budget the time and the legal fees.
Taxes on Your Return
Interest earned on a tax lien certificate is ordinary income in the year received. If you earn $10 or more, the paying jurisdiction should send you a Form 1099-INT, and the IRS receives a copy. Failing to report the interest is a common audit trigger. If you eventually acquire property through a tax deed and later sell it, capital gains rules apply. Your basis is what you paid at the sale plus additional costs such as quiet title fees and back taxes you covered during the holding period.
Clearing Title
The quiet title action mentioned earlier is the biggest hidden cost that new tax deed investors underestimate. Until a court declares your title clear, most buyers won’t touch the property and no title insurer will write a policy. The action typically runs several months and $1,500 to $5,000 in fees. If your plan is a quick flip, that timeline and cost eat straight into your margin. If your plan is long-term hold, do the quiet title action early, because unresolved title issues get harder to fix as time passes.