An Arizona property tax lien attaches automatically on January 1 of each tax year, giving the county a legal claim against your property for any unpaid taxes.1Arizona Legislature. Arizona Revised Statutes 42-17153 – Lien for Taxes; Time Lien Attaches; Priority The lien outranks mortgages and nearly every other claim on the property, delinquent balances accrue interest at 16% per year, and if the taxes stay unpaid, the county sells the lien at a public auction. You then have three years to redeem before the purchaser can foreclose and take title.
When the Lien Attaches
You don’t get a separate notice when a tax lien is created. It happens by operation of law on January 1, covering the full amount of taxes owed for that year.2Arizona Legislature. Arizona Code 42-17153 – Lien for Taxes; Time Lien Attaches; Priority
The lien reaches both real property (land and buildings) and personal property. If a property owner’s real property in the county is worth less than $200, the unpaid tax also becomes a personal debt of the owner rather than only a claim against the property.2Arizona Legislature. Arizona Code 42-17153 – Lien for Taxes; Time Lien Attaches; Priority
Arizona also allows cross-collection between property types. Personal property can be seized to satisfy taxes on real property, and real property can be used to satisfy taxes on personal property. A homestead is the exception: it can only be charged for taxes owed on the homestead itself.3Arizona Legislature. Arizona Revised Statutes 42-17154 – Attachment of Lien to Other Property
Payment Deadlines
Property taxes in Arizona are split into two installments. The first half is due October 1 and becomes delinquent after November 1 at 5:00 p.m. The second half is due March 1 and becomes delinquent after May 1 at 5:00 p.m.4Arizona Legislature. Arizona Code 42-18052 – Due Dates and Times; Delinquency
If your total tax bill is $100 or less, the entire amount is due on October 1 and becomes delinquent after December 31 at 5:00 p.m. When a delinquency deadline lands on a weekend or legal holiday, the cutoff moves to 5:00 p.m. on the next business day.4Arizona Legislature. Arizona Code 42-18052 – Due Dates and Times; Delinquency
Interest on Delinquent Taxes
Delinquent property taxes accrue simple interest at 16% per year from the delinquency date until paid. Any fraction of a month counts as a full month, so slipping a few days into a new month adds another month of interest to your bill.5Arizona Legislature. Arizona Revised Statutes 42-18053 – Interest on Delinquent Taxes
Two situations avoid interest. If the delinquency resulted from an error by the county assessor or treasurer, no interest is charged for their mistake. And if you pay the entire year’s tax by December 31 of the tax year, no interest applies even if you missed the November first-half deadline.5Arizona Legislature. Arizona Revised Statutes 42-18053 – Interest on Delinquent Taxes
The county treasurer also has discretion, with board of supervisors approval, to waive interest and penalties for one year after a mortgage or deed of trust is satisfied or released on the property. This is a one-time break per property, aimed at owners who may not realize their taxes are no longer being paid through an escrow account.
Priority Over Mortgages and Other Liens
A property tax lien is prior and superior to every other lien and encumbrance on the property, with only two exceptions: liens held by the state itself and liens for property taxes from other tax years.1Arizona Legislature. Arizona Revised Statutes 42-17153 – Lien for Taxes; Time Lien Attaches; Priority
In practical terms, a tax lien outranks mortgages, deeds of trust, mechanic’s liens, judgment liens, and any other non-tax claim. If the property is sold through foreclosure or any other process, the tax lien is paid first. The order the other liens were recorded doesn’t matter. A mortgage filed ten years ago still falls behind a tax lien from this year.
This is why most mortgage agreements require borrowers to keep taxes current through escrow. An unpaid tax lien can wipe out the lender’s security. Buyers and investors evaluating a property should check for outstanding tax liens before closing, because those obligations sit at the top of the priority stack.
How Long the Lien Lasts
An Arizona tax lien has no built-in expiration date. It stays on the property until one of three things happens: the owner pays the taxes in full with all penalties, interest, and charges; the property is sold at a tax sale and title transfers to a new owner; or the county issues a certificate of removal and abatement.2Arizona Legislature. Arizona Code 42-17153 – Lien for Taxes; Time Lien Attaches; Priority
The certificate of removal and abatement is a narrow remedy tied to specific problems, such as an assessment error, a defective lien sale, failure to advertise the lien for sale within five years of delinquency, situations where collection costs would exceed the recovery, or de minimis personal property taxes six or more years past due.6Arizona Legislature. Arizona Revised Statutes 42-18351 – Circumstances for Abating Tax and Removing Tax Lien If the treasurer finds one of those grounds and the board of supervisors approves, the delinquent taxes are deleted from the record.7Arizona Legislature. Arizona Code 42-18353 – Certificate of Removal and Abatement; Purging Record of Tax, Penalty and Interest For most owners, the lien doesn’t go away on its own. Waiting it out is not a strategy.
The Annual Tax Lien Sale
When property taxes remain delinquent, the county treasurer is required to sell the lien to recover the unpaid amount. Arizona’s tax lien sales begin on the second Monday in February each year and continue until every lien has been offered.8Arizona Legislature. Arizona Code 42-18101 – Sale and Foreclosure of Tax Liens; Effect of Insubstantial Failure to Comply
Before the sale, the county treasurer sends notice by mail to each delinquent taxpayer by September 1 and later mails a copy of the proposed sale notice to the owner’s last known address. The sale covers all unpaid delinquent taxes on the property, including penalties, interest, and charges for the current and prior years.
Arizona uses a bid-down interest system. Investors aren’t bidding a dollar amount. They’re bidding the interest rate they’re willing to accept on the lien. Bidding starts at the statutory maximum of 16% and decreases in 1% increments. The investor who accepts the lowest rate wins. Bids of 0% are allowed, meaning the investor earns no interest but still holds a lien that can lead to property ownership. The winning bidder must pay the county treasurer within 24 hours. If no one bids on a particular lien, the treasurer assigns it to the state for the full amount owed.
Redemption Period for Property Owners
If your tax lien is sold, you don’t lose the property right away. Arizona gives you three years from the date of the tax lien sale to redeem. You can even redeem after the three-year mark, as long as the treasurer hasn’t yet delivered a treasurer’s deed to the lien purchaser.9Arizona Legislature. Arizona Code 42-18152 – When Lien May Be Fully Redeemed; Partial Payment Refund
To redeem, you pay the county treasurer the full amount due: the original delinquent taxes plus interest at the rate the investor bid at auction, up to 16%. The treasurer collects a $10 fee for a full redemption, or $5 for the first and last partial payment if you’ve been paying in installments.10Arizona Legislature. Arizona Code 42-18154 – Certificate of Redemption; Statement of Partial Payment Once you pay in full, the treasurer issues a certificate of redemption and the lien is cleared.
Three years sounds generous, but the interest keeps running the whole time. At the full 16% rate, redemption costs grow substantially every year you wait.
Foreclosure After the Redemption Period
Once three years have passed and the owner hasn’t redeemed, the lien purchaser can file a lawsuit in superior court to foreclose the owner’s right to redeem. The suit is filed in the county where the property sits, and the county treasurer must be named as a party.11Arizona Legislature. Arizona Code 42-18201 – Action to Foreclose Right to Redeem
There is also a hard outer deadline. The purchaser must bring the foreclosure action no later than ten years after the last day of the month in which they acquired the lien. Miss that window and the right to foreclose is lost. If a court order or other legal prohibition blocks the purchaser from filing during that period, the ten-year deadline extends by twelve months after the prohibition ends.11Arizona Legislature. Arizona Code 42-18201 – Action to Foreclose Right to Redeem
Before filing, the lien holder must send the owner a notice of intent by certified mail at least 30 days but no more than 180 days before the foreclosure action.12Arizona Legislature. Arizona Code 42-18202 – Notice That notice is the owner’s last warning. If the owner still doesn’t redeem, the court can order the property sold and the owner’s rights extinguished. Minor procedural defects in the sale process usually won’t save the owner. Arizona law provides that an insubstantial failure to comply with sale procedures does not invalidate the assessment, the lien, or the sale.8Arizona Legislature. Arizona Code 42-18101 – Sale and Foreclosure of Tax Liens; Effect of Insubstantial Failure to Comply
How Bankruptcy Affects a Tax Lien
Filing for bankruptcy triggers an automatic stay that temporarily halts most collection actions, including tax lien foreclosures. A lien purchaser who wants to proceed during a bankruptcy must ask the court to lift the stay before moving forward.
The stay buys time but does not eliminate the lien. Property tax liens generally survive bankruptcy because they are secured by the property. In a Chapter 13 case, the debtor may be able to pay off the delinquent taxes through a repayment plan. In a Chapter 7, the property may be liquidated with the tax lien paid first from the sale proceeds, consistent with its priority.
What Falling Behind Really Costs
The most immediate effect of an unpaid tax lien is a clouded title. Selling or refinancing becomes very difficult because title companies flag the lien and lenders won’t finance a property where a superior claim exists. Most buyers won’t close either, since they would be buying the problem along with the house.
The financial pressure compounds fast. At 16% simple interest, a $3,000 delinquent balance grows by $480 in the first year. If the lien is sold and the owner drifts toward the three-year redemption deadline, the payoff can be dramatically higher than the original tax bill.
The most serious consequence is losing the property itself through a judicial foreclosure that terminates the owner’s rights.11Arizona Legislature. Arizona Code 42-18201 – Action to Foreclose Right to Redeem Owners have the most room to fix the problem earliest in the process. Contacting the county treasurer’s office before the November or May delinquency deadlines, or at least before the February lien sale, preserves far more control than waiting until an investor holds the certificate and the three-year clock is running.