This updated guide (September 2026) explains how to evaluate state tax rules when choosing a retirement home and how to sequence withdrawals—traditional IRA/401(k), Roth, pension and Social Security—to reduce combined state and federal tax drag. It's written for retirement-planning enthusiasts who are comparing candidate states, timing large taxable events, or considering a change of domicile.

Why this matters in 2026

Taxes remain one of the largest controllable factors that affect how long a retirement portfolio lasts. Since our original June 2026 piece, two practical developments are especially important:

  • RMD and Roth changes from SECURE 2.0: The RMD age increased (to 73 for most taxpayers beginning in 2023, and scheduled to rise further under law in later years). SECURE 2.0 also expanded Roth options inside employer plans and changed catch-up contribution rules for higher earners. Those changes change timing for required withdrawals and the attractiveness of Roth conversions.
  • State residency scrutiny and remote work: Post-pandemic remote work patterns have led some states to strengthen domicile audits and to clarify nexus rules. That makes careful documentation of a move more important than ever—especially if you plan to time large conversions or distributions around a move.

Prerequisites / what you should have before you start

Before you compare states or move money, assemble these items:

  • Latest Social Security statement (or SSA.gov online estimate)
  • Pension statements showing taxable treatment and COLA rules
  • Account balances and basis information for IRAs, 401(k)s, Roth IRAs and taxable brokerage accounts
  • Income estimates for the next 5–10 years (including expected part‑time work or rental income)
  • Recent federal tax returns and an estimate of your federal tax bracket at different withdrawal levels

Step-by-step process to pick the best state for your retirement taxes

Step 1 — Inventory your income and accounts

  1. List expected annual income by source, with a separate line for: Social Security, pensions (specify public vs private), traditional IRAs and 401(k) withdrawals, Roth IRAs, taxable account drawdowns, rental and earned income.
  2. For each retirement account, note federal tax status: fully taxable (traditional), tax-free if qualified (Roth), or taxable at capital gains rates (taxable brokerage).
  3. Estimate the timing and magnitude of one‑time events you may consider (Roth conversions, sale of a home, large IRA lump-sum withdrawals).
  4. Project RMDs under current law (SECURE 2.0 changed RMD ages—confirm which age applies to you based on your birth year).

Why: You can't compare states accurately without the full income picture. Roth conversions and one-time events can shift both federal and state liability materially in a single year.

Step 2 — Narrow candidate states and gather authoritative tax rules

  1. Shortlist 2–4 states you're willing to live in (include cost, family proximity and healthcare access as qualifiers).
  2. For each state, pull rules directly from the state Department of Revenue or statute. Key items to capture: existence of a broad-based individual income tax; whether Social Security is taxed and to what extent; treatment of public vs private pensions; whether distributions from IRAs/401(k)s are treated as ordinary income; any age-based exemptions or retiree credits; estate or inheritance taxes; and how the state treats Roth distributions and conversions.
  3. Note whether the state counts federal adjusted gross income (AGI) or modifies AGI for state tax calculation—this affects whether a federally tax-free Roth withdrawal still shows up on the state return.

Quick 2026 fact: Eight states had no broad-based individual income tax (Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington and Wyoming). New Hampshire and a few states still tax only interest and dividends. Laws change—verify the current rules before acting.

Step 3 — Build year-by-year tax projections

  1. Create a spreadsheet showing federal taxable income, provisional income (for Social Security taxability), and state taxable income for at least the first five years and for a 10–15 year horizon that includes RMDs.
  2. Model multiple scenarios: base case (no conversions), incremental Roth conversion schedule, and an accelerated conversion (one large conversion in year X), plus early and late Social Security claiming ages.
  3. Include Medicare IRMAA impacts—higher reported modified adjusted gross income (MAGI) can trigger Medicare Part B/D surcharges; those thresholds are adjusted annually and can be material when you convert large IRA sums.
  4. Compare net after‑tax income and after-tax wealth accumulation across states and scenarios.

Why: A conversion that saves $5,000 in state tax may push you into a higher federal bracket or IRMAA surcharge that costs significantly more—so test full interactions.

Step 4 — Time residency and major taxable events

  1. If you plan a large Roth conversion or one-time withdrawal, consider becoming domiciled in a no-income-tax state before the taxable event—but only after you understand and document domicile tests for both states.
  2. Remember calendar-year rules: most states tax income based on where you were domiciled or resident during the tax year. Moving mid-year can split exposure; clarify the state’s rules on part-year residency.
  3. Document your move thoroughly (see checklist below). Expect states with higher taxes to examine recent domicile changes surrounding large taxable events.

Example (updated for 2026): A married couple, ages 68, with Social Security $36,000, a pension $18,000, and planned traditional IRA withdrawals $50,000. Two candidate states:

  • NoTaxState (0%): State tax = $0.
  • Flat5State (5%): State taxes Social Security and pensions. Taxable state income ≈ $36k + $18k + $50k = $104k; state tax ≈ 5% × $104k = $5,200.

If the couple does an $80,000 Roth conversion while resident in Flat5State, they could pay an additional $4,000 in state tax; if they establish domicile in NoTaxState first, state tax could be $0—but confirm residency timing and federal consequences before acting.

Checklist to establish and document a change of domicile

  1. File a declaration of domicile (where permitted) and a voter registration in the new state.
  2. Get a driver’s license and vehicle registration in the new state promptly.
  3. Spend a majority of days each year in the new state; maintain a contemporaneous travel log for the tax year of the change.
  4. Change mailing addresses for banks, investment accounts, doctors and the IRS where possible (Form 8822 for the IRS).
  5. Update estate documents (will, power of attorney) and name local advisors; keep copies of real-estate closings, rental leases and utility bills.

Why: States scrutinize timing when large taxable events cluster with moves. A robust, contemporaneous paper trail greatly reduces the risk of a successful domicile challenge.

Other factors to weigh beyond state income tax

  • Cost of living and housing: No-income-tax states can still be expensive—Florida and parts of Texas have seen strong housing appreciation since 2020.
  • Property and sales taxes: Some no‑income-tax states offset revenue with higher property or sales taxes; include those in total-tax comparisons.
  • Healthcare and Medicare Advantage options: Medicare Advantage availability and provider networks vary by state and county; for retirees, out-of-pocket costs and access to specialists matter more than headline tax rates.
  • Estate and inheritance taxes: A few states still impose estate or inheritance taxes; check state exemptions and rates if you have a larger estate.
  • Family and services: Proximity to family, long-term care options, and local senior services influence non-financial value.

Common mistakes to avoid

  • Relying only on headline tax rates and ignoring exemptions, deductions and how Social Security or pensions are treated.
  • Failing to model IRMAA and Medicare surcharges when doing large Roth conversions.
  • Assuming Roth distributions are always ignored by states—most follow federal treatment, but a few states use different definitions of taxable income or AGI. Always confirm state guidance.
  • Neglecting domicile documentation—moving and then doing a large taxable event without a clear paper trail invites audits.
  • Overvaluing a single-year state tax saving without considering long-term housing, healthcare and estate tax impacts.

Pro tips

  • Use modular spreadsheets: build a model where you can flip a “state” tab and see federal + state outcomes side by side for the same withdrawal path.
  • Stagger Roth conversions to avoid bunching into higher federal brackets or triggering IRMAA step-ups; small, multi-year conversions often beat a single large conversion.
  • If you have part-time remote work across states, consult a CPA experienced with multi-state issues—nexus and sourcing rules vary and are increasingly enforced.
  • Consider partial-year domicile strategies only with professional advice; some states accept a short transition, but others treat any income earned as resident-source for the full year.
  • Keep a contemporaneous “move file” (deeds, DMV copies, calendar notes, physician registrations). It’s the simplest and most effective defense in an audit.

When to get professional help

Engage a CPA or tax attorney when you face:

  • Large one-time taxable events (Roth conversions over $50k, large IRA lump-sum distributions)
  • High net worth and potential state estate tax exposure
  • Complex pension rules (public pensions with special reciprocity, out-of-state reciprocity rules, or defined-benefit plan peculiarities)
  • Potential domicile disputes with a prior state

Action plan — what to do this month

  1. Inventory accounts and build a 3-, 5- and 10-year cash-flow model that includes projected RMDs and possible Roth conversions.
  2. Shortlist 2–4 states and download official state tax guidance for Social Security, pensions and retirement-account treatment.
  3. Run side-by-side state projections in a spreadsheet to show after-tax cash flow and total taxes (state + federal) under alternate withdrawal strategies.
  4. Identify any single-year taxable events you can schedule and evaluate residency timing and documentary steps needed to support a move.
  5. Schedule a meeting with a CPA experienced in interstate taxation and an estate-planning attorney in the state where you plan to domicile.

Bottom line

State tax strategy for retirees in 2026 requires a methodical, documentation-focused approach. Inventory your income, model federal and state interactions (including IRMAA and RMD timing under SECURE 2.0), and make domicile changes only with a clear record. Tax rules are an important lever—but total costs (housing, healthcare, property taxes) and personal considerations should drive the final choice. With careful modeling and timing, especially for Roth conversions and RMDs, you can preserve more of your nest egg while keeping the retirement lifestyle you want.

FAQ

Is Roth conversion always tax‑efficient if I move to a no‑income‑tax state?

Not always. Converting in a no‑income‑tax state can avoid state tax on the conversion, but the conversion still increases federal taxable income for the year and can trigger higher federal tax, affect Social Security taxability and raise Medicare IRMAA surcharges. Run a multi-year federal + state projection before acting.

How much documentation is enough to prove a domicile change?

There’s no single checklist that guarantees acceptance, but a combination of a filed declaration of domicile (if the new state allows it), new driver’s license, voter registration, changed mailing addresses for financial accounts and healthcare, utility bills, a travel log showing majority days, and updated estate documents creates a strong record. Keep originals and contemporaneous copies.

Will moving mid‑year always shield me from state tax on that year’s RMDs or conversions?

Not necessarily. States differ on part‑year residency rules. Some tax income based on days resident; others treat domicile differently. If you plan an RMD or conversion in a year you move, confirm the state’s rule and time the transaction accordingly.

Do most states tax qualified Roth IRA withdrawals?

Most states follow federal treatment and do not tax qualified Roth distributions. However, a few states use different measures of taxable income or AGI; always confirm with the state Department of Revenue before assuming zero state tax.

How do Medicare IRMAA thresholds affect conversion planning?

IRMAA (Income-Related Monthly Adjustment Amount) surcharges for Medicare Part B and D are triggered by higher MAGI in the second preceding year. A large conversion can push you into an IRMAA bracket and increase Medicare premiums materially for years. Factor that into conversion sizing and timing.