---
type: "Bill"
title: "Revise income tax laws related to businesses"
description: "Revise income tax laws related to businesses"
jurisdiction: "us/states/mt"
legislature: "Montana Legislature"
session: "2017"
identifier: "HB 511"
citation: "Montana HB 511 (2017)"
classification: ["bill"]
subjects: ["Revenue", "State", "Taxation (Generally)", "Taxation--Corporations", "Taxation--Individual Income"]
status: "enacted"
primary_sponsors: ["Rob Cook"]
version_count: 1
action_count: 60
vote_count: 9
first_action: "2016-11-15"
last_action: "2017-05-04"
source: "openstates"
source_identifier: "ocd-bill/9697122d-2e7d-4245-b693-1d6f7ddd9ac4"
source_url: "http://laws.leg.mt.gov/legprd/LAW0203W$BSRV.ActionQuery?P_SESS=20171&P_BLTP_BILL_TYP_CD=&P_BILL_NO=&P_BILL_DFT_NO=LC0892&P_CHPT_NO=&Z_ACTION=Find&P_SBJT_SBJ_CD=&P_ENTY_ID_SEQ="
source_hash: "5b1f7dc7c99f26a06d2b02ff5707fb9d9a507ff4308f2941de6611ba88c05643"
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 511 (2017) — Revise income tax laws related to businesses

## Version chain

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

1. **Enrolled** (enrolled) — [source](http://leg.mt.gov/bills/2017/BillPdf/HB0511.pdf)

## Votes

- Do Pass — **62–38** (pass) · legislature
- AMD-1 Blasdel D/PASS — **48–2** (pass) · legislature
- AMD-2 Thomas D/PASS — **34–16** (pass) · legislature
- DO PASS — **15–7** (pass) · legislature
- DO PASS — **18–2** (pass) · legislature
- Do Concur — **32–18** (pass) · legislature
- Do Concur as Amended — **39–11** (pass) · legislature
- Do Concur as Amended — **32–18** (pass) · legislature
- Do Pass — **71–29** (pass) · legislature

## Sponsors

- Rob Cook — primary (person)

## Timeline

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

- **2016-11-15** Draft Request Received
- **2017-01-03** Fiscal Note Probable
- **2017-01-12** Draft On Hold
- **2017-01-18** Draft Taken Off Hold
- **2017-02-07** Draft to Requester for Review
- **2017-02-07** Draft in Legal Review
- **2017-02-07** Draft in Edit
- **2017-02-09** Draft to Drafter - Edit Review [SMH]
- **2017-02-10** Draft in Input/Proofing
- **2017-02-10** Draft in Final Drafter Review
- **2017-02-10** Bill Draft Text Available Electronically
- **2017-02-10** Executive Director Review
- **2017-02-10** Draft in Assembly
- **2017-02-10** Executive Director Final Review
- **2017-02-10** Draft Ready for Delivery
- **2017-02-16** Draft Delivered to Requester
- **2017-02-17** Introduced `introduction`
- **2017-02-17** Fiscal Note Requested
- **2017-02-17** Introduced Bill Text Available Electronically
- **2017-02-18** Referred to Committee `referral-committee`
- **2017-02-18** First Reading `reading-1`
- **2017-02-23** Fiscal Note Received
- **2017-02-23** Fiscal Note Signed
- **2017-02-24** Fiscal Note Printed
- **2017-03-14** Hearing
- **2017-03-22** Committee Executive Action--Bill Passed `committee-passage`
- **2017-03-22** Committee Report--Bill Passed `committee-passage`
- **2017-03-23** Scheduled for 2nd Reading
- **2017-03-23** 2nd Reading Passed `reading-2`
- **2017-03-23** Rereferred to Committee `referral-committee`
- **2017-03-27** Hearing
- **2017-03-27** Committee Executive Action--Bill Passed `committee-passage`
- **2017-03-28** Committee Report--Bill Passed `committee-passage`
- **2017-03-29** Scheduled for 3rd Reading
- **2017-03-29** 3rd Reading Passed `passage, reading-3`
- **2017-03-30** Transmitted to Senate
- **2017-03-31** First Reading `reading-1`
- **2017-04-01** Referred to Committee `referral-committee`
- **2017-04-05** Hearing
- **2017-04-12** Committee Vote Failed; Remains in Committee
- **2017-04-18** Taken from Committee; Placed on 2nd Reading `reading-2`
- **2017-04-18** Scheduled for 2nd Reading
- **2017-04-18** 2nd Reading Motion to Amend Carried
- **2017-04-18** 2nd Reading Concurred as Amended `reading-2`
- **2017-04-18** Printed - New Version Available
- **2017-04-19** Returned to House
- **2017-04-19** Reconsidered Previous Action; Placed on 2nd Reading `reading-2`
- **2017-04-19** Scheduled for 2nd Reading
- **2017-04-19** 2nd Reading Motion to Amend Carried
- **2017-04-19** 2nd Reading Concurred as Amended `reading-2`
- **2017-04-19** 3rd Reading Concurred `passage, reading-3`
- **2017-04-19** Printed - New Version Available
- **2017-04-20** Sent to Enrolling
- **2017-04-20** Printed - Enrolled Version Available
- **2017-04-20** Returned from Enrolling
- **2017-04-26** Signed by Speaker
- **2017-04-29** Signed by President
- **2017-05-01** Transmitted to Governor `executive-receipt`
- **2017-05-03** Signed by Governor `executive-signature`
- **2017-05-04** Chapter Number Assigned

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/9697122d-2e7d-4245-b693-1d6f7ddd9ac4`. Confidence: reported (aggregated from official Montana legislature records).