Implement Vermont H-0619 Millionaire Tax

[DTrim99]

Implement Vermont H-0619 Millionaire Tax

Overview

Implementation tracking issue for Vermont H-0619, a proposed bill (2026 session) that creates a 3% tax on federal adjusted gross income for individuals with AGI equal to or greater than $1,000,000.

Note: This is a PROPOSED bill, not enacted law. Implementation should go in the contrib folder for proposed reforms.

Bill Details

• Bill Number: Vermont H-0619 (2026 session)
• Source: https://legislature.vermont.gov/Documents/2026/Docs/BILLS/H-0619/H-0619%20As%20Introduced.pdf
• Threshold: $1,000,000.00 federal AGI
• Rate: 3% (0.03)
• Important: This is NOT a marginal tax - once the threshold is crossed, the 3% rate applies to the FULL AGI amount

Status Checklist

• Documentation collected
• Parameters created (in contrib folder)
• Variables implemented (in contrib folder)
• Tests written
• CI passing
• PR ready for review

Documentation Summary

Program Overview

Vermont H-0619 proposes a 3% tax on all federal adjusted gross income for individuals whose AGI equals or exceeds $1,000,000. Unlike typical marginal tax brackets, this tax applies to the entire AGI once the threshold is met, not just the amount above the threshold.

Key Rules

• Applies to taxpayers with federal AGI >= $1,000,000
• Tax rate: 3% of full AGI (not marginal)
• Based on federal adjusted gross income

References

• Vermont H-0619 Bill Text

Implementation Details

Parameter Files

Variable Files

Test Files

Related PRs

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This issue serves as the central coordination point for all agents working on this implementation.