# Missouri HB1800: Changes the percentage of the cap on the inflationary growth factor for the assessment growth of real or personal property occurring within a political subdivision, defines assessment value, and adds provisions related to the sales ratio studies performed by the State Tax Commission

Missouri HB1800, Changes the percentage of the cap on the inflationary growth factor for the assessment growth of real or personal property occurring within a political subdivision, defines assessment value, and adds provisions related to the sales ratio studies performed by the State Tax Commission, is a 2026 Regular Session House bill sponsored by Mark Matthiesen (Republican); status failed, last action 2026-03-23 (Second read and referred: Select Committee on Property Taxes and the State Tax Commission); PRIA reads it as touching household money (as of 2026-11-04).

- Canonical: https://policyrisk.com/state-bill/MO-HB1800-2026
- As of: 2026-11-04
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: Missouri HB1800
- State: Missouri
- Session: 2026 Regular Session
- Title: Changes the percentage of the cap on the inflationary growth factor for the assessment growth of real or personal property occurring within a political subdivision, defines assessment value, and adds provisions related to the sales ratio studies performed by the State Tax Commission
- Status: failed
- Chamber: House
- Introduced: 2025-12-01
- Last action: 2026-03-23, Second read and referred: Select Committee on Property Taxes and the State Tax Commission
- Sponsor: Mark Matthiesen (Republican)
- Cosponsors: 0
- Touches household money: yes
- Roll calls: 4 (102 yes, 69 no in all)
- Economic provisions PRIA read: 0

## Summary

No summary available.

## Bill overview

No economic impacts identified for this bill.

## Sponsors and cosponsors

- Sponsor: Mark Matthiesen (Republican), House

## Roll call votes

| Date | Chamber | Motion | Result | Yes | No | Other |
| --- | --- | --- | --- | --- | --- | --- |
| 2026-03-09 | House | Reported Do Pass | pass | 5 | 2 |   |
| 2026-03-09 | House | Third Read and Passed | pass | 82 | 61 | 2 |
| 2026-02-09 | House | Reported Do Pass | pass | 9 | 3 |   |
| 2026-01-22 | House | Reported Do Pass | pass | 6 | 3 |   |

## Actions (26)

- 2026-03-23: Second read and referred: Select Committee on Property Taxes and the State Tax Commission (Senate)
- 2026-03-09: Reported to the Senate and First Read (Senate)
- 2026-03-09: Third Read and Passed - AYES: 82 NOES: 61 PRESENT: 2 (House)
- 2026-03-09: Taken Up for Third Reading (House)
- 2026-03-09: Reported Do Pass - AYES: 5 NOES: 2 PRESENT: 0 (House)
- 2026-03-09: Voted Do Pass (House)
- 2026-03-09: Executive Session Completed (House)
- 2026-03-05: Referred: Fiscal Review (House)
- 2026-03-04: Perfected with Amendments - HA 1, HA 2, adopted (House)
- 2026-03-04: Title of Bill - Agreed To (House)
- 2026-03-04: Taken Up for Perfection (House)
- 2026-03-02: Placed on the Informal Perfection Calendar (House)
- 2026-02-26: Placed Back on Formal Perfection Calendar (House)
- 2026-02-11: Placed on the Informal Perfection Calendar (House)
- 2026-02-09: Reported Do Pass - AYES: 9 NOES: 3 PRESENT: 0 (House)
- 2026-02-09: Voted Do Pass (House)
- 2026-02-09: Executive Session Completed (House)
- 2026-01-29: Referred: Rules - Legislative (House)
- 2026-01-22: Reported Do Pass - AYES: 6 NOES: 3 PRESENT: 0 (House)
- 2026-01-22: Voted Do Pass (House)
- 2026-01-22: Executive Session Completed (House)
- 2026-01-15: Public Hearing Completed (House)
- 2026-01-08: Referred: Special Committee on Tax Reform (House)
- 2026-01-08: Read Second Time (House)
- 2026-01-07: Read First Time (House)
- 2025-12-01: Prefiled (House)

## Bill text

- Perfected, 2026-03-04: [PDF](https://documents.house.mo.gov/billtracking/bills261/hlrbillspdf/4169H.01P.pdf)
- Introduced, 2026-01-07: [PDF](https://documents.house.mo.gov/billtracking/bills261/hlrbillspdf/4169H.01I.pdf)

## Related bills

- SB1408: Increases the maximum speed limit from 70 to 75 miles per hour on rural interstates and freeways (signed)
- SB1135: Creates "Bentley and Mason's Law" relating to child maintenance orders for certain persons convicted of the offense of driving while intoxicated (signed)
- SB1067: Establishes the Uniform Public Expression Protection Act, which provides procedures for dismissal of actions based on public expression (signed)
- SB1019: Modifies several provisions relating to health care (signed)
- SB973: Creates and modifies provisions relating to real estate transactions (signed)
- SB890: Repeals expired, terminated, sunset, and obsolete sections of law (signed)

## Sources
- [Perfected (PDF)](https://documents.house.mo.gov/billtracking/bills261/hlrbillspdf/4169H.01P.pdf)
- [Introduced (PDF)](https://documents.house.mo.gov/billtracking/bills261/hlrbillspdf/4169H.01I.pdf)

## Related
- [SB1408: Increases the maximum speed limit from 70 to 75 miles per hour on rural interst…](https://policyrisk.com/state-bill/MO-SB1408-2026)
- [SB1135: Creates "Bentley and Mason's Law" relating to child maintenance orders for cert…](https://policyrisk.com/state-bill/MO-SB1135-2026)
- [SB1067: Establishes the Uniform Public Expression Protection Act, which provides proced…](https://policyrisk.com/state-bill/MO-SB1067-2026)
- [SB1019: Modifies several provisions relating to health care](https://policyrisk.com/state-bill/MO-SB1019-2026)
- [SB973: Creates and modifies provisions relating to real estate transactions](https://policyrisk.com/state-bill/MO-SB973-2026)
- [SB890: Repeals expired, terminated, sunset, and obsolete sections of law](https://policyrisk.com/state-bill/MO-SB890-2026)
- [Missouri bills](https://policyrisk.com/states/missouri/bills)
- [Missouri state hub](https://policyrisk.com/states/missouri)
- [All state legislation](https://policyrisk.com/state-bills)

Source: PRIA, https://policyrisk.com/state-bill/MO-HB1800-2026 (as of 2026-11-04).