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HB 3236

Authorizes certain counties to opt in to an exemption from state and local sales and use tax on certain building supplies

2026 Regular Session Introduced by Bryant Wolfin

Missouri HB 3236 would let opt-in counties and eligible municipalities exempt up to $250,000 of building-supply purchases from sales taxes for unattached single-family homes for fi

Referred: Emerging Issues(H)
#constructionandbuildingcodes #countygovernment #taxationandrevenue-general #taxationandrevenue-salesanduse
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Bill Summary · HB 3236

Overview

Missouri House Bill 3236 (HB 3236), introduced in the 2026 session, would create a temporary, opt-in program allowing counties and eligible municipalities to exempt from state and local sales and use taxes the purchases of building supplies for constructing unattached single-family residences. The exemption would apply up to $250,000 per construction project and would run for five years, starting January 1, 2027.

Purpose and intent

  • Provide a targeted sales tax exemption to encourage construction of unattached single-family homes within eligible political subdivisions (counties and municipalities).
  • Create a framework for local governments to voluntarily participate in reducing upfront construction costs by exempting building supplies from state and local taxes.

Key provisions and changes

  • Definitions (Section 144.528):

    • Building supplies: materials permanently fixed to a building and directly used in construction (examples include lumber, concrete, roofing, flooring, plumbing, doors, windows).
    • County: any county or city not within a county.
    • Eligible political subdivision: any county or municipality in Missouri.
    • Municipality: incorporated city, town, or village.

  • Tax exemption scope and duration:

    • Effective January 1, 2027 for five years (through 2032), for purchases of building supplies used in constructing an unattached single-family residence.
    • Exemption applies to all state and local sales and use taxes, including those under section 32.085 and chapter 144.
    • Exemption limited to the first $250,000 of purchase amounts per unattached single-family residence.

  • Administration and eligibility:

    • Taxpayers must obtain a Sales and Use Tax Exemption Letter from the Missouri Department of Revenue (DOR) before relying on the exemption.
    • DOR to design and publish an application; applicants must provide information about the planned construction and building permits.
    • The exemption letter confirms eligibility for the exemption up to the specified cap.

  • Program participation and locality requirements:

    • Participation is voluntary.
    • An eligible political subdivision may opt in by an ordinance adopted by its governing body.
    • If the construction occurs in an incorporated area within an eligible subdivision (i.e., a municipality within a county), both the county and the municipality must adopt the program for the exemption to apply.
    • In unincorporated areas, both the county and any applicable municipalities must adopt the program for the exemption to apply.

  • Administration and rulemaking:

    • DOR and participating subdivisions may promulgate rules for administering the section.
    • Rules must comply with Missouri’s rulemaking framework (Chapter 536); the section contains nonseverable provisions meaning certain constitutional issues could affect the entire rulemaking authority if challenged.

Who is affected

  • Taxpayers planning to purchase building supplies for constructing unattached single-family residences within opt-in counties and eligible municipalities.
  • Counties and municipalities choosing to participate in the exemption via ordinance.
  • The Missouri Department of Revenue, which would issue exemption letters and administer the program.
  • Builders, developers, and homeowners undertaking new unattached single-family residence projects within participating jurisdictions.

Procedural and timeline aspects

  • Effective date: January 1, 2027.
  • Duration: Five-year period (through December 31, 2031, or the five-year window ending in 2032 depending on counting; text specifies five years from 2027).
  • Opt-in mechanism: Local governing bodies must adopt an ordinance to participate.
  • Interaction rules: If part of an area includes both county and municipality, both must adopt the program for exemptions to apply in that area.

Potential impact (high-level)

  • Economic: Potentially lowers upfront construction costs for unattached single-family homes in participating areas, which could stimulate residential development.
  • Fiscal: Reduces tax revenue from exempted building-supply purchases within participating jurisdictions during the five-year period.
  • Administrative: Introduces a formal process for exemption letters and local rulemaking, requiring coordination between the DOR and participating localities.

Note: The bill includes nonseverability clauses tied to rulemaking authority, meaning constitutional or legal challenges could affect the implementation of the program.

Compiled from official sources — confirm details with the bill’s official record.

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