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Montana · Weigh your options

Property tax foreclosure in Montana

Montana is a tax lien state. If you do not pay, the county attaches a tax lien to your property, and it may assign that lien to a private buyer. You then have about 3 years to redeem by paying what is owed, with penalty and interest. If you do not redeem a home you live in, it must be sold at a public auction and the extra money goes to you; other property can pass by tax deed with no surplus paid to the owner.

Reviewed against Montana law and official sources on October 11, 2026. General information, not legal advice.

The property tax process in Montana, step by step

  1. Taxes become delinquent

    November 30 and May 31

    Half of your property tax is due by 5 p.m. on November 30 and the other half by 5 p.m. on May 31, unless your notice was mailed late. Unpaid amounts are delinquent, and the county adds a 2 percent penalty plus interest of 5/6 of 1 percent a month until you pay.

    Mont. Code Ann. § 15-16-102

  2. Notice and the tax lien

    Notice by the last Monday in June; lien attaches by the first working day in August

    The county treasurer publishes or posts a notice listing delinquent properties and must mail you a notice at least 2 weeks before the lien attaches. Once the lien attaches, the county holds it unless it is assigned to a third party who pays the delinquent taxes. You get a copy of the tax lien certificate, which states when the county or the buyer can get a tax deed.

    Mont. Code Ann. §§ 15-17-122, 15-17-125

  3. Redeem your property

    By the first working day in August, 3 years after the lien attached

    You, a lienholder or anyone with an interest can redeem by paying the lien amount with penalty, interest and costs, plus any later taxes, with the same penalty and interest. The deadline is 2 years instead of 3 for certain vacant subdivided lots with unpaid special improvement district assessments. If the county still holds the lien, you may be able to pay off one tax year at a time.

    Mont. Code Ann. §§ 15-18-111, 15-18-112

  4. Notice that you may lose the property

    May 1 to May 30 of the year the redemption period ends

    The county, or the buyer who holds the assigned lien, must send notice by certified mail, return receipt requested, to the occupant and to the owner and lienholders found in a title report, and must also publish it. If the buyer does not file proof of this notice, the treasurer must cancel the tax lien and the assignment. If you get this letter, it is the last warning before a deed or auction.

    Mont. Code Ann. §§ 15-18-212, 15-18-219

  5. A home you live in is sold at auction

    Auction within 60 days after the buyer applies

    If you live in the home as the owner of record, the lien buyer cannot simply take a tax deed. The buyer must apply, and the treasurer must hold a public auction where the opening bid includes the amount owed plus half of the assessed value of the land and home. Within 30 days after the winning bidder pays, the treasurer must pay the surplus to the legal owner of record, even if you have moved out of state.

    Mont. Code Ann. §§ 15-18-219, 15-18-220, 15-18-221

  6. Other property passes by tax deed

    After the redemption period ends

    For property that is not occupied by its owner, the treasurer grants a tax deed to the lien buyer, or to the county if the county commissioners direct it. If the county takes the deed, you may buy the property back up to 24 hours before the county first offers it for sale by paying the taxes, interest and costs. Montana's law on county sales of tax deed land sends any extra money to the county, not to the former owner.

    Mont. Code Ann. §§ 15-18-211, 7-8-2303, 7-8-2306

  7. Relief that can help

    Apply each year

    The Elderly Homeowner/Renter Credit is a refundable income tax credit of up to $1,150 for Montanans 62 and older with household income under $45,000, and you can claim it even if you do not otherwise file a return. The Department of Revenue also runs a Land Value Property Tax Assistance Program for long held family homes whose land value is far higher than the home's.

Common questions in Montana

What is the minimum bid at a Montana tax deed auction for an occupied home?

The treasurer cannot accept a bid below the opening bid. That bid is the amount needed to redeem, plus the buyer's application costs and fees, plus half of the assessed value of your land and home (or half of a recent independent appraisal). This rule is meant to protect your equity, and the surplus is paid to you within 30 days after the sale.

What happens if no one bids at a Montana tax deed auction?

If there are no bidders, or no bidder completes payment within 24 hours, the treasurer must cancel the lien buyer's assignment and file a notice of cancellation. Ask the county treasurer right away what you now owe and how to redeem.

Does a Montana county pay me surplus if it takes a tax deed to my property?

Montana's statute on county sales of tax deed land does not provide for paying any extra money to the former owner, and it has not been amended since 1991. Since Tyler v. Hennepin County (2023), keeping equity beyond the tax debt can be an unconstitutional taking. If the county took a tax deed to property you did not live in, talk to a lawyer or legal aid about a surplus claim.

Step by step

More on foreclosure in Montana

Understand the process

What is happening and how much time there is.

Weigh your options

What can stop it, and what happens if it goes ahead.

Get help now

Who to call, and what to do when a sale is scheduled.

Also in Montana

Property tax foreclosure (this page)Claim surplus funds

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Sources for this page

  1. Mont. Code Ann. § 15-16-102 Time for payment, penalty for delinquency
  2. Mont. Code Ann. § 15-17-121 Definitions (tax lien)
  3. Mont. Code Ann. § 15-17-122 Notice of pending attachment of tax lien
  4. Mont. Code Ann. § 15-17-125 Attachment of tax lien
  5. Mont. Code Ann. § 15-18-111 Time for redemption
  6. Mont. Code Ann. § 15-18-112 Redemption from property tax lien
  7. Mont. Code Ann. § 15-18-211 Tax deed
  8. Mont. Code Ann. § 15-18-212 Notice that tax deed may issue
  9. Mont. Code Ann. § 15-18-219 Application for tax deed for residential property
  10. Mont. Code Ann. § 15-18-220 Sale at public auction
  11. Mont. Code Ann. § 15-18-221 Distribution of tax deed auction proceeds
  12. Mont. Code Ann. § 7-8-2303 Repurchase rights of taxpayer
  13. Mont. Code Ann. § 7-8-2306 Distribution of sale and lease proceeds
  14. Mont. Code Ann. § 70-9-825 Agreement to locate property
  15. Montana Department of Revenue, Unclaimed Property
  16. Montana Department of Revenue, Elderly Homeowner/Renter Credit
  17. Montana Department of Revenue, Land Value Property Tax Assistance Program
  18. Montana Code Annotated 2025, Title 71, Chapter 1, Part 3: Small Tract Financing Act (table of contents)
  19. Mont. Code Ann. § 71-1-312, Discontinuance of foreclosure when default paid
  20. Mont. Code Ann. § 71-1-313, Conditions for foreclosure by advertisement and sale
  21. Mont. Code Ann. § 71-1-315, Notice, sale, payment
  22. Mont. Code Ann. § 71-1-316, Disposition of proceeds of sale, surplus funds
  23. Mont. Code Ann. § 71-1-317, Deficiency judgment not allowed
  24. Mont. Code Ann. § 71-1-318, Trustee's deed
  25. Mont. Code Ann. § 71-1-319, Possession
  26. Mont. Code Ann. § 71-1-222, Proceedings in foreclosure suits
  27. Mont. Code Ann. § 71-1-232, Deficiency judgment not allowed on purchase price mortgage
  28. Mont. Code Ann. § 25-13-802, Time for redemption
  29. Montana Department of Commerce, Homeowner Assistance Fund
  30. Montana Division of Banking and Financial Institutions, Consumer Information (Foreclosure Prevention)