Tax lien state · Montana

Montana Tax Deed & Tax Lien Sales 2026

County listings for Montana are on the way. The rules below are ready now, so you can plan before the first sale is published.

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How Montana sales work

Mont. Code Ann. Title 15, ch. 17 and ch. 18
Sale type
Tax Lien (county holds the lien, investors take it by assignment)
Redemption period
3 years from the date the lien attaches
Interest or penalty
10% per year plus a 2% penalty
Sale frequency
No auction; assignments available from the county treasurer once liens attach (typically late summer)
Bidding method
First-come assignment at face value (no bid-down, no premium)
Where sales run
In-person or by mail with the county treasurer

Summary from public statutes. Rules change and counties differ. Verify with the county before bidding.

What catches investors off guard

  1. The tax deed process after redemption expires is notice-heavy and any defect in notice can void the deed.
  2. Assignments are handed out first-come, so popular counties run out of quality parcels quickly.
  3. You must keep paying subsequent years' taxes to protect your position, and those amounts are tied up until redemption.
  4. Many liens attach to low-value rural land or mobile homes with little resale market.

How tax sales work in Montana

Montana does not run a public auction for tax liens. When property taxes go unpaid, the county treasurer attaches a tax lien in the county’s own name after the required notices. An investor can then take an assignment of that lien by paying the delinquent taxes, penalties, interest and an assignment fee to the treasurer. The county is simply transferring its position to you; nothing is bid up or bid down.

Because the process is administrative rather than competitive, timing matters more than bidding skill. Liens attach after the delinquency date, and treasurers publish or post a list of properties eligible for assignment. In active counties, investors line up as soon as the list is available.

Redemption and interest

The property owner has three years from the date the lien attached to redeem. Redemption pays the assignee the amount paid plus interest at 10 percent per year and a 2 percent penalty. If you pay subsequent years’ taxes, those amounts are added to the lien and earn the same rate.

If the owner does not redeem within the three-year window, the assignee can apply for a tax deed. This step requires strict written notice to the owner and every lienholder of record, followed by a final redemption window. Courts have voided Montana tax deeds over notice defects, so most investors use a title company or attorney for this stage.

When and where sales happen

Liens attach on an annual cycle after the second-half payment deadline, so assignment lists tend to appear from late summer into fall, though counties differ. Assignments are handled at the county treasurer’s office in person or by mail. There is no statewide platform, and each county sets its own procedures for requesting a list and submitting payment.

What to check before you bid

Verify with the treasurer whether the lien is on land, a mobile home or a special assessment, since the collateral differs. Pull the county’s assessed value and compare it to the lien amount. Check for federal liens, which are not wiped by a tax deed without separate notice. Look at road access and zoning, because much of the eligible inventory is undeveloped rural land. Finally, budget for the notice and title work needed at the deed stage.

How AuctionScouts helps here

AuctionScouts aggregates county assignment lists as they are released, scores each parcel from 0 to 100 on value, risk and liquidity, and flags surviving liens such as federal tax liens. The calendar tracks each county’s release timing so you know when to act.

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