In 2022, Mississippi Governor Tate Reeves signed House Bill 531 into law, initiating a phased elimination of the state's individual income tax. The law, which took effect on January 1, 2023, began a multi-year process of reducing and eventually eliminating Mississippi's personal income tax—a move that would make Mississippi the first state in the Deep South to do so and would have significant implications for business planning, entity selection, and the state's economic competitiveness.^[1]

The Current Structure and Phase-Out Timeline

Before the legislation, Mississippi imposed a graduated individual income tax with three brackets: 0 percent on the first $5,000 of taxable income, 4 percent on income from $5,001 to $10,000, and 5 percent on income above $10,000. HB 531 immediately eliminated the 4 percent bracket for tax year 2023, effectively creating a flat 5 percent tax on income above $10,000. The law also increased the personal exemption, removing additional low-income earners from the tax rolls.

Beginning in tax year 2024, the top rate begins a series of annual reductions: from 5 percent to 4.7 percent, then decreasing by 0.1 percentage points annually until it reaches 4 percent. The phase-out schedule is contingent on revenue triggers—the rate reductions proceed only if state general fund revenues meet specified thresholds, ensuring that the tax reduction does not outpace the state's fiscal capacity.^[2]

The ultimate goal is the complete elimination of the individual income tax, though the timeline for reaching zero depends on revenue performance. At the current pace of reduction, the income tax could be fully phased out within approximately 15 to 20 years, assuming the revenue triggers are consistently met.

Implications for Business Entity Selection

The income tax phase-out has direct implications for business entity selection and structuring in Mississippi. Pass-through entities—S corporations, partnerships, and LLCs—pass their income through to their owners' individual returns, where it is subject to the individual income tax. As the individual income tax rate declines and eventually reaches zero, the state tax burden on pass-through business income will decline correspondingly.

C corporations, by contrast, are subject to the Mississippi corporate income tax, which is a separate tax from the individual income tax and is not affected by HB 531. The corporate income tax rate in Mississippi remains at 5 percent on taxable income above $10,000. This means that as the individual income tax declines, the relative tax advantage of the pass-through structure over the C corporation structure increases at the state level. A business owner whose S corporation income was previously taxed at the same 5 percent rate whether structured as a C corp or an S corp will eventually face a 5 percent state tax on C corporation income and zero state tax on S corporation income.^[3]

This evolving rate differential should be a factor in entity selection decisions for new businesses and in restructuring decisions for existing businesses. The analysis is complicated by the fact that the corporate income tax may also be modified in future legislative sessions, and by the interaction of state and federal tax rules—including the Section 199A qualified business income deduction, which provides federal tax benefits to pass-through entity owners but is scheduled to expire after 2025.

Impact on Recruitment and Economic Development

Mississippi's income tax phase-out is, in part, a competitive response to actions by neighboring states. Tennessee and Texas have long had no individual income tax, and other states have been moving in the same direction. The elimination of the state income tax is intended to make Mississippi more attractive to businesses considering relocation or expansion, to high-income individuals evaluating where to establish domicile, and to retirees choosing among Southern states.

For business owners evaluating whether to locate or expand in Mississippi, the declining income tax rate is one factor among many—including workforce availability, infrastructure, regulatory environment, and access to markets. But for businesses whose owners draw significant income from the business, the elimination of a 5 percent state income tax represents a meaningful economic benefit over time.

Planning Considerations

Several planning strategies emerge from the income tax phase-out. First, to the extent taxpayers have discretion over the timing of income recognition—for example, through the timing of asset sales, retirement account distributions, or the exercise of stock options—deferring income to later years when the rate is lower (or zero) can produce real tax savings. The present value of this benefit depends on the taxpayer's discount rate and the speed at which the rate declines.

Second, the phase-out may affect Roth conversion analysis. Converting traditional IRA assets to Roth assets in a year when the state income tax rate is declining (but not yet zero) involves paying state income tax on the conversion at the current rate. If the taxpayer expects to take distributions in a year when the state income tax rate is zero, the conversion produces a state tax cost with no corresponding benefit—since the distributions would have been state-tax-free anyway.

Third, the phase-out reinforces the importance of the pass-through entity structure for Mississippi businesses. Business owners who are currently operating as C corporations should evaluate whether converting to an S corporation or LLC (taxed as a partnership or S corporation) would produce state tax savings as the individual rate declines. The analysis must account for the federal tax implications of conversion, including potential built-in gains taxes and the loss of certain C corporation benefits.^[4]

Mississippi's income tax phase-out represents a significant shift in the state's fiscal structure. While the full elimination is years away, the planning implications are immediate. Business owners and their advisors should be incorporating the declining rate into entity selection, income timing, and retirement planning decisions now, while the trajectory of the phase-out remains favorable. Our firm regularly advises Mississippi business owners on state and federal tax planning strategies that account for these evolving dynamics.^[5]