Lewis and Clark County, MT property tax deadlines
4 coming property tax dates for Lewis and Clark County, Montana. Each one links to its official source and shows the day LevyDay last checked it.
| Next dates | Bills due | Last day without penalty | Appeal by | Exemption filing |
|---|---|---|---|---|
| Lewis and Clark | Not on file | Nov 30, 2026lccountymt.govOct 21 | Set by noticeState rulesee source | Not on file |
Deadlines in date order
| Date and source | Deadline |
|---|---|
| May 31 every yearlccountymt.govOct 21 | Last day without penalty Second half due If May 31 is on a weekend, pay the next working day (June 1 in 2026). |
| September 30 every yearlccountymt.govOct 21 | Other Apply to pay in seven parts Only for your primary home. Apply with the county treasurer. |
| November 30 every yearlccountymt.govOct 21 | Last day without penalty First half due If November 30 is on a weekend, pay the next working day (December 1 in 2025). The county takes only half or full payments. |
| Varies, see rule set by noticeState rulesee source | Appeal deadline Appeal to the County Tax Appeal Board The county clerk and recorder must get it within 30 days of the date on the Department of Revenue's value notice, or of its informal review decision. You get one appeal every two-year cycle. |
Appealing your assessed value
Appeal by the date on your noticeState rulesee source
If you think the county valued your home too high, you can appeal. Filing with the county is free and you can do it yourself.
Get help filing an appeal
After you send your details, we look for an independent appeal firm or attorney to take your case. We'll be in touch once one has agreed. Firms usually charge a share of what you save, and the one that takes it may pay LevyDay a referral fee.
LevyDay doesn't file appeals or give legal or tax advice. We only pass your details on. The independent firm or attorney that takes your case does the work and sets its own fee.
Get help filing an appealIf you pay late
- Paying late: Under Montana law, late taxes get a 2% penalty plus interest of 5/6 of 1% a month. lccountymt.govOct 21
Already passed
- Jun 1, 2026 2025 second half due (moved from Sunday) lccountymt.govOct 21
Official offices
Places in Lewis and Clark County
They are: Augusta, Canyon Creek, Craig, East Helena, Gilman, Helena, Helena Valley Northeast, Helena Valley Northwest, Helena Valley Southeast, Helena Valley West Central, Helena West Side, Lincoln, Marysville, Milford Colony, Rimini, Unionville, Wolf Creek, York. Every place in the county gets the dates above.
Nearby in the Montana list
Golden ValleyGraniteHillJeffersonJudith BasinLakeLibertyLincolnMcConeMadisonMeagherMineral