Should You Do a Roth Conversion Before Moving to a No-Tax State? (w/Examples) + FAQs

This article reflects federal rules and the rules of California, New York, and the nine no-income-tax states as of June 2026, and covers tax year 2026. Tax law changes — confirm current figures before you file.

Quick Answer

No — in most cases you should wait until after you establish residency in the no-tax state. A Roth conversion is taxed by the state where you live when you convert, not where you earned the money. Under federal law 4 U.S.C. § 114, your old state usually cannot tax it once you truly move.

Why Timing Your Conversion Around a Move Matters

A Roth conversion turns pre-tax IRA or 401(k) money into tax-free Roth money, and you pay ordinary income tax on every dollar you convert in the year you convert it. If you do that conversion while you still live in a high-tax state like California, that state taxes the conversion on top of the federal bill. Move first, convert second, and a no-tax state like Florida or Texas adds zero state tax — which on a large conversion can mean tens of thousands of dollars saved.

The stakes are real and the deadline is hard. Roughly nine states levy no personal income tax on wages — Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. A conversion must be completed by December 31 to count for that tax year, so the order of your move and your conversion inside a single calendar year can swing your tax bill by a life-changing amount.

Here is what you will learn:

🧭 How the “where you live when you convert” rule actually works, and the one federal law that protects you.
💰 Three fully worked dollar examples showing the exact state tax you save by waiting.
🏠 How to prove you really moved, so your old state cannot drag the conversion back.
⚠️ The part-year-resident trap that quietly taxes “post-move” conversions anyway.
🩺 The hidden costs — Medicare IRMAA surcharges and Social Security taxation — that a big conversion can trigger.

Roth Conversions, Residency, and State Tax — The Core Rule

A Roth conversion is reported as ordinary income on your federal return for the year of the conversion, and there is no income limit on who can convert in 2026. The single most important fact for movers is this: a conversion is taxed by your state of residence on the day you convert, because conversion income has no fixed “source” the way a paycheck or rental property does.

This is why the move-then-convert sequence is so powerful. If you are a California resident on the day you convert $300,000, California taxes that $300,000 at rates up to 13.3%. If you have already become a Florida resident, Florida taxes it at 0%. The federal tax is identical either way — only the state layer changes.

The federal shield: 4 U.S.C. § 114

In 1996, Congress passed the Pension Income Tax Limits Act, now codified at 4 U.S.C. § 114. It says no state may tax the retirement income of a person who is not a resident or domiciliary of that state. This directly stopped California from chasing former residents who had earned their savings in-state but moved away before withdrawing.

The consequence of this law is huge: once you are genuinely a nonresident, your old state cannot tax your IRA distributions or Roth conversions, even though you built that IRA while living there. A common misconception is that California “claws back” deferred income earned in-state — it tried to, and Congress shut it down. What you should do is make sure you are a true nonresident before you convert, because the shield only protects nonresidents.

Domicile vs. residency

Domicile is your true, permanent home — the place you intend to return to. Residency is often tested by a day-count, such as the 183-day rule many states use. You can be a resident of a state without being domiciled there, and high-tax states examine both when deciding if your move was real.

The consequence of getting this wrong is that your old state treats you as still domiciled there and taxes 100% of your conversion. For example, a “snowbird” who buys a Florida condo but keeps a California home, California doctors, and California voter registration may still be a California domiciliary. What you should do is cut as many ties to the old state as you can — and do it before the conversion year, not during it.

Which Situation Applies to You?

The right move depends on your facts. Find yourself below, then read the matching section.

You will fully relocate this year and can delay the conversion until after the move — the clean win; convert after you are a nonresident (see the worked examples).
You move mid-year and are a part-year resident — danger zone; your old state may still tax conversions done while you were a part-year resident (see the part-year trap).
You are moving to Washington State — Washington has no wage income tax now, but a 9.9% tax on income over $1 million starts in 2028; large conversions may want to happen before then.
You are over 73 and taking RMDs — you must take your required minimum distribution first, and you cannot convert an RMD, so plan the order carefully.
You collect Social Security or are on Medicare — a big conversion can tax your benefits and spike your premiums; spread conversions across years.

Worked Example #1 — Maria Waits and Saves $39,600

Maria, age 62, lives in Los Angeles and plans to retire to Naples, Florida. She wants to convert $300,000 from her traditional IRA. Her conversion alone lands the top dollars in California’s higher brackets, and we will use an estimated 13.2% effective California rate on the converted amount for illustration.

Convert while still a CA resident: $300,000 × 13.2% ≈ $39,600 in California tax, on top of her federal tax.
Move to Florida first, then convert: $300,000 × 0% = $0 in state tax.

Maria’s Choice	What It Costs Her
Converts $300,000 while still a California resident	About $39,600 in extra California state tax
Establishes Florida residency first, then converts	$0 state tax; federal tax is unchanged

By simply moving before converting, Maria keeps roughly $39,600. Her federal bill is the same in both cases, so the entire savings come from changing her state of residence first.

Worked Example #2 — David’s Part-Year Trap

David, age 58, leaves New York on June 30 and moves to Austin, Texas. In October — after the move — he converts $150,000, assuming Texas’s 0% rate protects him. The problem is that New York taxes part-year residents on income while they were residents, and the conversion fell in the same tax year as his New York residency period.

New York generally taxes a part-year resident’s full-year income and then prorates by a New York income percentage. Because David’s overall picture still ties heavily to New York for that year, a slice of his conversion can be pulled into New York tax. At an assumed 6.5% effective New York rate on a partial allocation, he could owe several thousand dollars he thought he had escaped.

David’s Mistake	The Result
Converts the same year he was a New York part-year resident	A portion of the $150,000 is taxed by New York
Should have waited until the first full calendar year as a Texas resident	$0 state tax on the conversion

The fix is timing. Had David waited until the next full calendar year — his first year as a Texas-only resident — the conversion would face no state tax at all.

Worked Example #3 — Susan Spreads It Out

Susan, age 65, moves from New Jersey to Nashville, Tennessee, and has $600,000 to convert. She also collects $36,000 a year in Social Security and is on Medicare. Converting all $600,000 in one year would tax 85% of her Social Security and rocket her into the top 2026 Medicare IRMAA bracket, pushing her Part B premium to $689.90 per month versus the standard $202.90.

Instead, after establishing Tennessee residency, Susan converts $120,000 a year for five years. She still pays $0 state tax in Tennessee, but she also keeps her federal bracket lower, limits how much of her Social Security is taxed, and avoids the steepest IRMAA tiers.

Susan’s Strategy	The Payoff
One $600,000 conversion in a single year	Top IRMAA tier (~$687/mo more for Part B), 85% of Social Security taxed
Five annual $120,000 conversions after moving	$0 state tax, lower federal brackets, smaller IRMAA hit

Susan’s plan shows that where you convert and how fast you convert are two separate decisions. Moving first solves the state tax; spreading the conversion solves the federal, Medicare, and Social Security pile-on.

The Hidden Federal Costs of a Big Conversion

Moving to a no-tax state erases the state bill, but the federal consequences travel with you. A large conversion raises your modified adjusted gross income (MAGI), and several federal items key off MAGI.

Medicare IRMAA surcharges

If you are on Medicare, your Part B and Part D premiums rise once your MAGI crosses the 2026 IRMAA thresholds. For 2026, single filers stay at the standard $202.90 Part B premium up to $109,000 MAGI ($218,000 for joint filers), and the top tier hits at $500,000 single / $750,000 joint.

The consequence is a two-year delayed surcharge, because IRMAA uses your MAGI from two years earlier. A conversion in 2026 can raise your 2028 premiums. What you should do is size each year’s conversion to stay below the next IRMAA cliff, since crossing a threshold by even one dollar jumps you to the higher premium for the whole year.

Social Security taxation

When you collect Social Security, the IRS uses “provisional income” to decide how much of your benefit is taxed. Per long-frozen federal thresholds, up to 85% of benefits become taxable once provisional income exceeds $34,000 single or $44,000 joint.

The consequence is that a large conversion can make 85% of your Social Security taxable in the conversion year. A common misconception is that no-tax states fix this — they do not, because Social Security taxation is a federal rule. What you should do is consider converting before you claim Social Security, which removes the benefit from the math entirely.

Federal vs. State: What Changes When You Move

Tax Layer	Does Moving to a No-Tax State Help?
Federal income tax on the conversion	No — the federal tax is identical in every state
State income tax on the conversion	Yes — drops to $0 in the nine no-tax states once you are a resident
Medicare IRMAA surcharge	No — IRMAA is federal and follows you
Social Security taxation	No — provisional-income rules are federal
Future Roth withdrawals	Yes and no — federally tax-free everywhere; also state-tax-free

The Washington State Wrinkle

Washington appears on the no-income-tax list, but it is a special case for big converters. Washington does not tax wages, but lawmakers approved a 9.9% tax on income above $1 million starting in 2028, with first payments due in 2029.

For most retirees this never bites, because typical retirement income sits far below $1 million. But a person planning a single very large conversion — say $1.5 million in one year after 2028 — could see the slice above $1 million taxed at 9.9%. If you are a Washington resident with a giant conversion in mind, the window to do it tax-free is closing, so completing it before 2028 may matter.

How to Establish Residency Before You Convert

Proving you really moved is the whole ballgame, because the federal shield only protects true nonresidents. High-tax states audit aggressive movers, and Texas exits in particular can be scrutinized.

Change your driver’s license and vehicle registration to the new state promptly.
Register to vote in the new state and actually vote there.
Update your mailing address, banks, and brokerage account to the new state.
Spend more days in the new state than the old one, and keep a calendar to prove it.
Move your “center of life” — doctors, dentist, place of worship, club memberships.

The consequence of skipping these steps is an audit in which your old state argues you never left, then taxes the entire conversion plus penalties and interest. What you should do is complete the move and the tie-cutting before the calendar year in which you convert, then convert once you can show a clean nonresident record.

Mistakes to Avoid

Converting while still a resident of your high-tax state — you pay state tax you could have avoided entirely by waiting.
Converting in the same year as a mid-year move — the part-year-resident rules can tax conversions you thought were “post-move.”
Keeping strong ties to the old state — your old state can claim you never truly left and tax the whole conversion.
Converting all your IRA in one year — you spike your federal bracket, your IRMAA premiums, and your Social Security taxation.
Forgetting the December 31 deadline — a conversion must be completed by year-end, unlike contributions, which allow until the filing deadline.
Ignoring the two-year IRMAA lookback — a conversion today raises Medicare premiums two years later, catching many retirees by surprise.
Converting required minimum distributions — if you are 73 or older, you must take your RMD first and cannot convert it, or you risk a penalty.
Assuming a no-tax state erases federal costs — IRMAA and Social Security taxation are federal and follow you everywhere.

Do’s and Don’ts

Do establish clean residency in the no-tax state before you convert, because the federal shield only covers true nonresidents.
Do spread large conversions over several years, because it keeps your federal bracket and IRMAA tier lower.
Do convert before claiming Social Security when possible, because it keeps the benefit out of the provisional-income math.
Do keep a day-count calendar and records of your move, because that is your defense in an audit.
Do model the federal tax, IRMAA, and Social Security hit together, because they interact in the same year.
Don’t convert during a part-year-resident year, because your old state can still tax part of it.
Don’t rush a $1 million-plus conversion in Washington after 2028, because the new 9.9% tax may apply.
Don’t convert your RMD, because the law does not allow it and penalties follow.
Don’t assume your state follows the federal rules, because state conformity varies.
Don’t cross an IRMAA threshold by a few dollars, because you pay the higher premium for the entire year.

Pros and Cons of Waiting Until After You Move

Pro: You eliminate state income tax on the conversion, often the single biggest saving.
Pro: Future Roth growth and withdrawals are tax-free at both the federal and state level.
Pro: You can pair the move with multi-year conversions for even more control.
Pro: You remove future RMDs from a Roth, shrinking later provisional income.
Pro: You lock in today’s federal brackets, which were made permanent under 2025 law.
Con: You must wait, which means market gains during the delay are converted at a higher value.
Con: Residency audits add paperwork and stress if your move is aggressive.
Con: A mistimed part-year conversion can still draw old-state tax.
Con: The federal tax bill is large and due in the conversion year, requiring cash on hand.
Con: IRMAA and Social Security effects still apply, so the savings are state-only.

What to Do Next

Confirm your move date and pick the first full calendar year you will be a resident of the no-tax state.
Cut ties to your old state now — license, voter registration, banks, doctors — and keep a day-count log.
Model the conversion’s federal tax, the 2026 IRMAA brackets, and the Social Security effect together, ideally over several years.
If you are 73 or older, take your RMD before any conversion.
Complete the conversion by December 31 of your target year, and keep records showing you were a nonresident of the old state.
Talk to a CPA or tax attorney if your conversion is large, your move is mid-year, or your old state is California or New York — the residency and part-year rules are complex, and professional guidance often involves a multi-year conversion plan plus an audit-defense file.

This article is educational and is not a substitute for advice from a licensed tax professional for your specific situation.

FAQs

Does my old state tax a Roth conversion after I move? No — under 4 U.S.C. § 114, a state cannot tax the retirement income of a true nonresident. The state where you live on the conversion date taxes it, so a clean move to a no-tax state means $0 state tax.

Which states have no income tax in 2026? Nine states: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. They do not tax wages, though Washington taxes some capital gains and adds a high-income tax in 2028.

Is there an income limit to do a Roth conversion? No — anyone can convert in 2026 regardless of income. The Roth conversion itself has no income cap, unlike direct Roth contributions, which phase out at higher MAGI levels.

When is the deadline for a Roth conversion? December 31 of the tax year. Unlike IRA contributions, which allow until the April filing deadline, conversions must be completed by year-end to count for that year.

Does moving to a no-tax state lower my federal tax on the conversion? No — federal income tax on a conversion is identical in every state. Moving only removes the state layer, not the federal bill, the Medicare surcharge, or Social Security taxation.

Can California tax my IRA after I move away? No — California cannot tax a nonresident’s IRA distributions or Roth conversions, because federal law blocks it. California tried to chase former residents before 1996, and Congress stopped it.

What is the part-year-resident trap? A timing risk where you move mid-year and convert in that same year. Your old state can still tax income from your residency period, so a “post-move” conversion may be partly taxed.

How much can a Roth conversion raise my Medicare premium? Up to about $687 a month more for Part B in 2026. The top IRMAA tier charges $689.90 versus the $202.90 standard premium, and IRMAA uses your MAGI from two years earlier.

Will a Roth conversion make my Social Security taxable? Yes, it can — a large conversion raises provisional income, and up to 85% of benefits become taxable once you pass $34,000 single or $44,000 joint. Converting before you claim avoids this.

Should I convert everything in one year after moving? No, usually not. One huge conversion spikes your federal bracket, IRMAA tier, and Social Security taxation. Spreading conversions over several years in a no-tax state keeps each year’s hit lower.

Does Washington State tax Roth conversions? Not yet — Washington does not tax wage income, and its capital gains tax generally exempts retirement accounts. But a 9.9% tax on income over $1 million starts in 2028.

Can I convert my required minimum distribution? No — if you are 73 or older, you must take your RMD first, and the RMD itself cannot be converted to a Roth. Convert only amounts above the RMD.

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