2026 Property Tax Due Dates
County-specificNovember 30
First installment due
May 31
Second installment due (following year)
Valley County Treasurer
Treasurer
Brenda Anderson
Phone
406-228-6230Mailing Address
501 Court Square Number 3
Glasgow, MT 59230
Office Hours
How to Pay
Online
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By Mail
Mail check payable to Valley County Treasurer — 501 Court Square Number 3, Glasgow MT 59230
In Person
Visit the Treasurer's office — 501 Court Square Number 3, Glasgow MT 59230, Monday through Friday 8am to 5pm
About Property Taxes in Montana
Montana property taxes are administered at the county level. The state Department of Revenue appraises property at market value and applies a class rate to determine the taxable value. Residential property is appraised at market value, and the taxable value equals a percentage of that (the residential class rate is set by the state legislature and has been reduced in recent years to around 1.35% of market value — meaning a $300,000 home has a taxable value of approximately $4,050). Montana has no sales tax, so property taxes are an important revenue source for local governments and schools. Tax bills are mailed in the fall and split into two payments.
Payment & Assessment
Montana property taxes are paid in two equal installments: First half: Due November 30 Second half: Due May 31 of the following year A 2% penalty per month (up to 10%) applies to late payments. Most counties offer online payment through the county treasurer's website. Contact your county treasurer for available payment options.
Statewide framework for Montana. Your county's specific rates and deadlines are shown above.
Other Counties in Montana
About Valley County
Valley County is a county in the U.S. state of Montana. Valley County was created in 1893 with area partitioned from Dawson County. As of the 2020 census, the population was 7,578. Its county seat is Glasgow. It is located on the Canada–United States border with Saskatchewan.
Source: Wikipedia — content available under CC BY-SA 4.0
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Due dates shown are for reference only. Contact your county treasurer's office to confirm official deadlines before making payments.