If you already invest in real estate and want a lower-cost way to put capital to work, tax liens are worth a closer look. They let you earn a fixed, legally set return without a mortgage, a renovation, or the carrying costs of owning a property. This guide covers what these sales are, where to find them, and how the process works.
When an owner stops paying property taxes, the county places a legal claim, called a lien, on the property for the unpaid amount, then sells that debt to investors as a tax lien certificate to recover the money sooner. This is where the phrasing trips people up: in most cases you are not buying the house or the land. You are buying the debt. The owner repays what they owed plus interest, and you earn your return. If they never repay, you may eventually have the right to foreclose and claim the property, though that outcome is uncommon.
It helps to keep two terms separate. A tax lien means you buy the unpaid debt and earn interest when the owner repays. A tax deed means you buy the property itself at auction. Some states sell liens, some sell deeds, and a few do both. If that distinction affects your plan, our breakdown of tax lien vs tax deed investing and our overview of property tax liens cover it in more detail.
Your return and timeline depend entirely on where the lien sits. Both the maximum interest rate and the redemption period are set by law, not the seller, which makes this approach predictable once you know the local rules. Always confirm current numbers with the county before you bid.
| State | Maximum Interest Rate | Typical Redemption Period |
|---|---|---|
| Florida | Up to 18% | 2 years |
| Arizona | Up to 16% | 3 years |
| Illinois | Up to 36% (18% per 6 months) | 2 to 3 years |
| Iowa | Up to 24% (2% per month) | ~2 years |
| Alabama | Up to 12% | 3 years |
Keep in mind that the maximum rate is a ceiling, not a guarantee. Because investors compete at auction, the winning bid is often well below the legal cap, especially in popular counties, so set a personal limit before you start bidding.
Once the mechanics make sense, the next question is where the lists are. A few reliable sources:
Once you find a sale you want to join, the sequence is straightforward.
The advantages are real: low entry costs, interest rates set by law, and a position that usually takes priority over other debts. Still, this is not free money. A lien on unbuildable or near-worthless land does little good if the owner never repays, your capital can sit idle for the full redemption period, and foreclosure is a legal process that only a small share of liens ever reach. For where newer investors slip, review the most common property tax investment mistakes before your first auction. Careful research is what separates a steady return from a costly surprise.
The process becomes manageable once you break it into pieces: understand that you are buying debt, learn your state's rules, find the lists, and do your homework before you bid. When you are ready to build a list of tax-delinquent properties, DealMachine can help you focus on the leads most worth your time.