Tax Lien Interest Rates Explained
The headline interest rate is rarely what you actually earn. Understand how bidding methods impact your true yield.
Check Current State and Local Requirements
Important: Tax lien and tax deed laws, interest or penalty rates, redemption periods, auction procedures, notice requirements, and deed or foreclosure processes can change. Requirements may also differ by county, municipality, property type, and auction. Before registering, bidding, paying subsequent taxes, beginning a deed or foreclosure process, or making another investment decision, verify the current rules directly with the applicable state authority and the county or municipal office conducting the sale. Consider consulting a qualified attorney or tax professional familiar with that jurisdiction.
The Statutory Maximum Rate
Every state sets a "statutory maximum" interest rate by law. Review our guide on acceptable interest rates to set your targets.
State-by-State Interest Rate Table
These are statutory maximums or fixed rates, not guaranteed returns. In bid-down states, competition often drives the winning rate far below the maximum. Always verify current rules with the applicable state and county officials before bidding.
| State | Statutory Max / Rate | Bidding Style |
|---|---|---|
| Florida | 18% max (bid down; 5% min penalty) | Bid Down Interest |
| Arizona | 16% max (bid down) | Bid Down Interest |
| Illinois | 9% max penalty (bid down) | Bid Down Penalty |
| New Jersey | 18% max (bid down to 0%, then premium) | Bid Down + Premium |
| Colorado | Variable (Fed discount + 9%) | Premium Bid |
| Iowa | 2%/month (24%/yr), fixed | Random / Round Robin |
| Maryland | Set by county (e.g., 6%–20%) | Bid Down / High-Bid Premium |
| Texas | 25%/50% redemption premium (penalty) | Redeemable Tax Deed |
Official sources for each state’s rate and procedure are listed in the dedicated state guide linked above. Illinois’s 9% is a maximum penalty bid (not a guaranteed annual return); Texas’s 25%/50% is a redemption premium on a deed, not lien interest; Maryland’s rate is set by each county, not statewide.
Bid-Down Interest Rate States
In states like Florida and Arizona, the auction starts at the maximum. Investors bid the rate down. In highly competitive markets, good properties are bid down to 0.25%.
Premium Bid States and ROI Impact
In states like Colorado, the rate is fixed. Investors compete by bidding a cash premium. If you pay a $1,500 premium on a $1,000 lien, your premium earns zero interest. If the lien redeems early, your annualized return is drastically reduced. Always use a bid calculator to model this impact.
Frequently Asked Questions
1. Why would someone bid 0% interest?
Some states have a mandatory minimum penalty (e.g., 5%) regardless of the bid rate. Others bid 0% hoping to foreclose on the property.
2. Is interest simple or compounding?
In almost all states, tax lien interest is simple interest accruing monthly or annually based on the original face value.
3. Does my premium earn interest?
In almost all premium states, the premium cash earns absolutely zero interest and sometimes isn't even refunded.
4. What is a flat penalty rate?
Some jurisdictions offer a flat penalty (e.g., 10%) rather than an annualized rate, meaning you earn 10% whether it redeems in one day or one year.
5. Can the government change my interest rate later?
No. The rate you win at auction is locked in by statute for the duration of that specific certificate.
Calculate Your True Yield
Input your premium and interest rate to see your actual annualized return.
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