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Roth conversion timing can trigger large avoidable state tax bills
A Yahoo Finance example cites a $200,000 IRA to Roth conversion, where converting while still a resident of a high-tax state can lead to a state bill in the five figures, while waiting until after the move to Florida can eliminate that state layer.
A Yahoo Finance explainer says timing a Roth conversion around a move to a low-tax state can materially change the state income tax a taxpayer owes, even when the federal tax treatment is unchanged.
In the example, a retiree converts $200,000 from a traditional IRA to a Roth in the current tax year, then relocates to Florida in January. The piece notes that a Roth conversion is treated as ordinary income for federal tax purposes and is also ordinary income for the state that claims the taxpayer as a resident during the year the conversion happens.
Because Florida imposes no individual income tax, the same converted dollars do not face state tax once the taxpayer is a Florida resident. The article contrasts that outcome with a conversion made while the taxpayer is still domiciled in a top-bracket state, where the state layer typically runs “well into five figures” on a $200,000 conversion.
The explainer also highlights that high-tax states may audit departing residents aggressively when a large income event occurs near the move date, and it emphasizes that taxpayers carry the burden of proving their domicile change. It states the example conversion would still fall into the same federal brackets regardless of whether the conversion occurs before or after the move, with federal brackets topping out at 24% and rising to 32% for higher taxable income ranges.