---
type: "Bill"
title: "Revise income tax laws to lower income taxes"
description: "Revise income tax laws to lower income taxes"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2025"
identifier: "HB 337"
citation: "Montana HB 337 (2025)"
classification: ["bill"]
subjects: ["Revenue", "State", "Taxation", "Taxation--Individual Income"]
status: "enacted"
primary_sponsors: ["Brandon Ler"]
version_count: 78
action_count: 63
vote_count: 11
first_action: "2024-11-20T15:18:47+00:00"
last_action: "2025-04-28T18:59:23+00:00"
source: "openstates"
source_identifier: "ocd-bill/592c6ebe-b93f-40d9-bcea-07eca4b6c835"
source_url: "https://bills.legmt.gov/#/laws/bill/2/LC1716?open_tab=sum"
source_hash: "9fb98e8a68ecff98d09ccff9f2decbf459c99d97ca67811fe1e57d98ba7c0138"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-mt"]
---

# Montana HB 337 (2025) — Revise income tax laws to lower income taxes

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **HB0337.001.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=280553)
2. **HB0337.001.001_Amendments-in-Context_final-full(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=280563)
3. **HB0337.001.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=280549)
4. **HB0337.001.002_Amendments-in-Context_final-full(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284312)
5. **HB0337.001.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284031)
6. **HB0337.001.003_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=284272)
7. **HB0337.002.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301083)
8. **HB0337.002.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=301069)
9. **HB0337.002.002_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310207)
10. **HB0337.002.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310197)
11. **HB0337.002.004_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=310208)
12. **HB0337.003.001_Amendments-in-Context_final-condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312812)
13. **HB0337.003.001_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312810)
14. **HB0337.003.002_Amendments-in-Context_final-full.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313177)
15. **HB0337.003.002_Amendments-in-Context_final-not condensed.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313178)
16. **HB0337_1(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285264)
17. **HB0337_1(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285265)
18. **HB0337_1(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285266)
19. **HB0337_1(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285267)
20. **HB0337_1.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=276775)
21. **HB0337_2(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285269)
22. **HB0337_2(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309352)
23. **HB0337_2(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309354)
24. **HB0337_2(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309355)
25. **HB0337_2(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309356)
26. **HB0337_2(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309894)
27. **HB0337_2(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309896)
28. **HB0337_2(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309899)
29. **HB0337_2(17).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309906)
30. **HB0337_2(18).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309919)
31. **HB0337_2(19).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309943)
32. **HB0337_2(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285272)
33. **HB0337_2(20).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309944)
34. **HB0337_2(21).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309945)
35. **HB0337_2(22).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=311844)
36. **HB0337_2(23).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312132)
37. **HB0337_2(24).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312133)
38. **HB0337_2(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285374)
39. **HB0337_2(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285375)
40. **HB0337_2(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285381)
41. **HB0337_2(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285385)
42. **HB0337_2(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285386)
43. **HB0337_2(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=303695)
44. **HB0337_2(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=309351)
45. **HB0337_2.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=285268)
46. **HB0337_3(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312557)
47. **HB0337_3(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312558)
48. **HB0337_3(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321408)
49. **HB0337_3.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=312556)
50. **HB0337_4(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313362)
51. **HB0337_4(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315017)
52. **HB0337_4(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313363)
53. **HB0337_4(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313365)
54. **HB0337_4(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313366)
55. **HB0337_4(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313367)
56. **HB0337_4(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313369)
57. **HB0337_4(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313370)
58. **HB0337_4(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=314629)
59. **HB0337_4(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315014)
60. **HB0337_4.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=313360)
61. **HB0337_X(1).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315019)
62. **HB0337_X(10).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321414)
63. **HB0337_X(11).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321415)
64. **HB0337_X(12).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321416)
65. **HB0337_X(13).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=324600)
66. **HB0337_X(14).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=326331)
67. **HB0337_X(15).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327022)
68. **HB0337_X(16).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=327872)
69. **HB0337_X(2).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315020)
70. **HB0337_X(3).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317225)
71. **HB0337_X(4).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317686)
72. **HB0337_X(5).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317693)
73. **HB0337_X(6).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317694)
74. **HB0337_X(7).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=317695)
75. **HB0337_X(8).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=320887)
76. **HB0337_X(9).pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=321400)
77. **HB0337_X.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=315018)
78. **LC1716.pdf** (committee substitute) — [source](https://api.legmt.gov/docs/v1/documents/getContent?documentId=272571)

## Votes

- AMD-HB0337.003.002 Dunwell D/PASS — **14–36** (fail) · upper
- do_pass_as_amended — **12–9** (pass) · lower
- AMD-HB0337.002.001 Thane DO PASS — **42–58** (fail) · lower
- Do Pass — **58–42** (pass) · lower
- AMD-HB0337.003.001 Hertz D/PASS — **47–2** (pass) · upper
- Do Pass — **55–40** (pass) · lower
- to_table — **20–1** (pass) · lower
- do_pass — **13–10** (pass) · lower
- Do Concur As Amended — **32–18** (pass) · upper
- be_concurred_in_as_amended — **7–1** (pass) · upper
- Do Concur — **34–16** (pass) · upper

## Sponsors

- Brandon Ler — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2024-11-20T15:18:47+00:00** (LC) Drafter Assigned
- **2024-11-20T15:18:47+00:00** (LC) Draft On Hold
- **2025-01-15T01:32:54+00:00** (LC) Draft Taken Off Hold
- **2025-01-15T01:33:26+00:00** (LC) Draft Taken Off Hold
- **2025-01-18T22:36:57+00:00** (LC) Draft in Legal Review
- **2025-01-18T22:51:33+00:00** (LC) Draft in Edit
- **2025-01-19T23:37:43+00:00** (LC) Draft in Input/Proofing
- **2025-01-20T15:23:48+00:00** (LC) Draft in Final Drafter Review
- **2025-01-20T20:16:26+00:00** (LC) Draft in Assembly
- **2025-01-20T20:30:38+00:00** (LC) Draft Ready for Delivery
- **2025-01-22T19:45:27+00:00** (LC) Drafter Assigned
- **2025-01-22T19:52:36+00:00** (LC) Draft in Legal Review
- **2025-01-22T19:57:18+00:00** (LC) Draft in Edit
- **2025-01-22T20:45:28+00:00** (LC) Draft in Input/Proofing
- **2025-01-22T21:35:22+00:00** (LC) Draft in Final Drafter Review
- **2025-01-22T21:45:01+00:00** (LC) Draft in Assembly
- **2025-01-22T21:58:27+00:00** (LC) Draft Ready for Delivery
- **2025-01-27T17:02:53+00:00** (LC) Draft Delivered to Requester
- **2025-01-29T14:36:27+00:00** (H) Introduced
- **2025-01-29T14:38:05+00:00** (H) Fiscal Note Requested
- **2025-01-29T18:07:29+00:00** (H) Referred to Committee - (H) Taxation `referral-committee`
- **2025-01-29T19:52:15+00:00** (H) First Reading `reading-1`
- **2025-01-31T20:13:38+00:00** (H) Hearing - (H) Taxation
- **2025-02-05T18:40:44+00:00** (H) Fiscal Note Received `receipt`
- **2025-02-06T17:01:39+00:00** (H) Fiscal Note Signed
- **2025-02-06T17:01:47+00:00** (H) Fiscal Note Printed
- **2025-02-11T18:44:08+00:00** (H) Tabled in Committee - (H) Taxation `amendment-deferral`
- **2025-02-19T18:28:48+00:00** (H) Committee Executive Action--Bill Passed as Amended - (H) Taxation `committee-passage`
- **2025-02-19T21:47:00+00:00** (H) Committee Report--Bill Passed as Amended - (H) Taxation `committee-passage`
- **2025-02-20T21:36:00+00:00** (H) Rereferred to Committee - (H) Appropriations `referral-committee, referral-committee`
- **2025-02-24T15:01:48+00:00** (H) Revised Fiscal Note Requested
- **2025-02-25T21:46:32+00:00** (H) Hearing - (H) Appropriations
- **2025-02-27T21:33:08+00:00** (H) Revised Fiscal Note Received `receipt`
- **2025-03-01T02:36:10+00:00** (H) Fiscal Note Unsigned
- **2025-03-03T17:42:06+00:00** (H) Fiscal Note Printed
- **2025-03-28T22:13:08+00:00** (H) Committee Executive Action--Bill Passed - (H) Appropriations `committee-passage`
- **2025-03-29T18:10:00+00:00** (H) Committee Report--Bill Passed - (H) Appropriations `committee-passage`
- **2025-04-01T19:00:00+00:00** (H) Scheduled for 2nd Reading `reading-2`
- **2025-04-01T19:43:00+00:00** (H) 2nd Reading Motion to Amend Failed `amendment-failure, failure, reading-2`
- **2025-04-01T19:44:00+00:00** (H) 2nd Reading Passed `reading-2, reading-2`
- **2025-04-02T15:00:00+00:00** (H) Scheduled for 3rd Reading `reading-3`
- **2025-04-02T23:24:00+00:00** (H) 3rd Reading Passed `passage, reading-3`
- **2025-04-03T15:14:04+00:00** (H) Transmitted to Senate
- **2025-04-03T21:00:30+00:00** (S) First Reading `reading-1`
- **2025-04-03T21:01:00+00:00** (S) Referred to Committee - (S) Taxation `referral-committee`
- **2025-04-04T13:55:08+00:00** (S) Hearing - (S) Taxation
- **2025-04-16T15:51:19+00:00** (S) Committee Executive Action--Bill Concurred as Amended - (S) Taxation
- **2025-04-16T20:28:00+00:00** (S) Committee Report--Bill Concurred as Amended - (S) Taxation
- **2025-04-17T17:29:28+00:00** (H) Revised Fiscal Note Requested
- **2025-04-18T15:00:00+00:00** (S) Scheduled for 2nd Reading `reading-2`
- **2025-04-18T16:57:00+00:00** (S) 2nd Reading Motion to Amend Carried `reading-2`
- **2025-04-18T17:10:00+00:00** (S) 2nd Reading Motion to Amend Failed `amendment-failure, failure, reading-2`
- **2025-04-18T17:15:00+00:00** (S) 2nd Reading Concurred as Amended `reading-2, reading-2`
- **2025-04-22T14:33:57+00:00** (H) Revised Fiscal Note Received `receipt`
- **2025-04-22T18:30:00+00:00** (S) Scheduled for 3rd Reading `reading-3`
- **2025-04-22T21:30:00+00:00** (S) 3rd Reading Concurred `passage, reading-3`
- **2025-04-23T17:30:44+00:00** (H) Sent to Enrolling
- **2025-04-25T14:25:44+00:00** (H) Returned from Enrolling
- **2025-04-25T17:00:00+00:00** (H) Signed by Speaker `passage`
- **2025-04-25T17:10:49+00:00** (S) Signed by President `passage`
- **2025-04-25T17:55:00+00:00** (H) Transmitted to Governor `executive-receipt`
- **2025-04-28T18:20:15+00:00** (H) Signed by Governor `executive-signature`
- **2025-04-28T18:59:23+00:00** Chapter Number Assigned `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/592c6ebe-b93f-40d9-bcea-07eca4b6c835`. Confidence: reported (aggregated from official Montana legislature records).