---
type: "Bill"
title: "Income tax; providing for tax rate change subject to certain requirement; repealing specified rate change. Effective date."
description: "Income tax; providing for tax rate change subject to certain requirement; repealing specified rate change. Effective date."
jurisdiction: "us/states/ok"
legislature: "Oklahoma Legislature"
session: "2017-2018"
identifier: "SB 170"
citation: "Oklahoma SB 170 (2017-2018)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Sears", "Thompson"]
version_count: 8
action_count: 34
vote_count: 3
first_action: "2017-02-06"
last_action: "2017-05-15"
source: "openstates"
source_identifier: "ocd-bill/4808fd6d-a613-484d-843d-b6254fe64f5f"
source_url: "http://www.oklegislature.gov/BillInfo.aspx?Bill=SB170&session=1800"
source_hash: "d77bdab4073dd8e5522624b644ff524f31504cd4add81c29c6904a4b3e967b61"
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-ok"]
---

# Oklahoma SB 170 (2017-2018) — Income tax; providing for tax rate change subject to certain requirement; repealing specified rate change. Effective date.

## Version chain

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

1. **Introduced** (filed) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 INT/SB/SB170 INT.PDF)
2. **Amended And Engrossed** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 AMENDMENTS/Amendment & Engr/SB170 HASB & ENGR.PDF)
3. **Engrossed** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 ENGR/SB/SB170 ENGR.PDF)
4. **Enrolled (final version)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 ENR/SB/SB170 ENR.PDF)
5. **Floor (House)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 FLR/HFLR/SB170 HFLR.PDF)
6. **Floor (Senate)** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 FLR/SFLR/SB170 SFLR.PDF)
7. **House Committee Substitute for Senate Bill** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 COMMITTEE SUBS/HCSS/SB170 HCS.PDF)
8. **Senate Committee Substitute** (committee substitute) — [source](http://webserver1.lsb.state.ok.us/cf_pdf/2017-18 COMMITTEE SUBS/SCS/SB170 CS.PDF)

## Votes

- THIRD READING — **75–12** (pass) · lower
- THIRD READING — **39–6** (pass) · upper
- FOURTH READING — **32–9** (pass) · upper

## Sponsors

- Sears — primary (person)
- Thompson — primary (person)

## Timeline

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

- **2017-02-06** First Reading `introduction, reading-1`
- **2017-02-06** Authored by Senator Thompson
- **2017-02-07** Second Reading referred to Appropriations `reading-2, referral-committee`
- **2017-02-07** Referred to Appr/Sub-Finance `referral-committee`
- **2017-02-14** Coauthored by Senator Matthews
- **2017-02-21** Recommendation to the full committee; Do Pass, amended by committee substitute Appr/Sub-Finance sub-committee `committee-passage`
- **2017-02-22** Coauthored by Representative Sears (principal House author)
- **2017-02-22** Coauthored by Senator Pittman
- **2017-02-22** Reported Do Pass, amended by committee substitute Appropriations committee; CR filed `committee-passage`
- **2017-02-22** Title stricken
- **2017-03-13** General Order, Considered
- **2017-03-13** Measure passed: Ayes: 39 Nays: 6 `passage`
- **2017-03-13** Referred for engrossment
- **2017-03-14** Engrossed to House `passage`
- **2017-03-14** First Reading `introduction, reading-1`
- **2017-03-27** Second Reading referred to Appropriations and Budget `reading-2, referral-committee`
- **2017-03-27** Referred to Appropriations and Budget Finance Subcommittee `referral-committee`
- **2017-03-30** Recommendation to the full committee; Do Pass Appropriations and Budget Finance Subcommittee `committee-passage`
- **2017-04-04** CR; Do Pass, amended by committee substitute Appropriations and Budget Committee `committee-passage`
- **2017-04-04** Coauthored by Senator(s) Sharp
- **2017-04-04** Title restored
- **2017-04-19** General Order
- **2017-04-19** Coauthored by Senator(s) Floyd
- **2017-04-19** Third Reading, Measure passed: Ayes: 75 Nays: 12 `reading-3, passage`
- **2017-04-19** Referred for engrossment
- **2017-04-20** Engrossed, signed, to Senate `passage`
- **2017-04-20** HAs read
- **2017-05-08** HAs adopted
- **2017-05-08** Measure passed: Ayes: 32 Nays: 9 `passage`
- **2017-05-08** Referred for enrollment
- **2017-05-09** Enrolled, to House
- **2017-05-09** Signed, returned to Senate
- **2017-05-09** Sent to Governor `executive-receipt`
- **2017-05-15** Approved by Governor 05/15/2017 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/4808fd6d-a613-484d-843d-b6254fe64f5f`. Confidence: reported (aggregated from official Oklahoma legislature records).