Should You Move States Before Doing a Roth Conversion? The Tax Math

State Taxes Are the Forgotten Variable

Federal income tax gets most of the attention in Roth conversion planning — but for residents of high-tax states, state income tax can materially change the conversion math. A retiree in California converting $100,000 might pay 22% in federal tax plus 9.3% in California state tax, for a combined marginal rate of over 31%. A retiree in Florida doing the same conversion pays 22% in federal tax and 0% in state tax. The difference is $9,300 per $100,000 converted.

Multiplied over several years of multi-year conversions, state taxes on conversion income can easily reach $50,000–$100,000 in high-tax states for retirees converting significant balances. Understanding your state's treatment of retirement income — and IRA distributions specifically — is an essential input in any conversion plan.

States with No Income Tax

Nine states impose no income tax on wages, retirement income, or investment returns:

• Alaska
• Florida
• Nevada
• New Hampshire (taxes interest and dividends only through 2024; zero tax from 2025)
• South Dakota
• Tennessee
• Texas
• Washington (no income tax; capital gains tax applies above thresholds)
• Wyoming

For retirees in these states, Roth conversion cost is purely a federal calculation. This makes conversion at any given bracket far more attractive than in comparable high-tax states — and is one of the reasons states like Florida and Texas are popular retirement destinations for financially sophisticated retirees.

States That Exempt Retirement Income

Several states with general income taxes exempt pension income, Social Security, or IRA distributions entirely or partially. However, the treatment of Roth conversions varies — because a Roth conversion is technically a distribution from a traditional IRA, not a pension payment, some states that exempt pensions still tax conversion income as ordinary income. States to research carefully include:

High-Tax States: The Significant Headwind

Several states impose significant income taxes on all ordinary income, including Roth conversion amounts:

• California: Up to 13.3% on income above $1 million, with 9.3% on income above $66,295 (2025). A large conversion in California can cost more in state tax than federal tax for some income ranges.
• Hawaii: Top rate of 11% starting at $200,000 of income.
• New Jersey: Up to 10.75% on income above $1 million; 8.97% on income above $500,000.
• Oregon: Up to 9.9% on income above $125,000 (single) / $250,000 (married).
• Minnesota: Up to 9.85% on income above $183,340 (married).

For a high-tax state resident in the 22% federal bracket plus 9% state bracket, the effective combined marginal rate on conversion income is 31%. Converting $100,000 costs $31,000 in combined tax rather than $22,000. The break-even horizon for the conversion is meaningfully longer, requiring more years of tax-free growth to recoup the extra state tax.

Timing Conversions Around Planned State Moves

If you are planning to relocate from a high-tax state to a no-income-tax or low-income-tax state — a move many retirees make — the timing of your Roth conversions relative to your move matters significantly. States tax income based on your residency when the income is recognized (when the conversion occurs), not where you previously lived.

If you plan to move from California to Nevada within the next two years, delaying your Roth conversions until after you establish Nevada residency saves the full California state tax — potentially 9–13% of every converted dollar. For a $200,000 conversion, that's $18,000–$26,000 in avoided state tax. That savings alone can justify delaying conversions until after the move.

Be aware that California in particular is known for aggressive residency audits. Simply declaring yourself a Nevada resident while maintaining significant California ties may not protect you from California income tax. Consult a tax professional familiar with California residency rules before relying on a state change to avoid conversion taxes.

State-Level Benefit Phaseouts

Some states offer income-based tax breaks for seniors that can be partially or fully eliminated by a large Roth conversion. These include property tax exemptions or "circuit breaker" credits, senior exemptions to state income taxes, and Medicaid income thresholds. Before executing a large conversion, review your state's senior tax benefits and determine whether higher income would trigger phaseouts of credits you currently enjoy.