'Best states for retirement taxes' lists that circulate every year, and get recirculated by search engines and AI assistants, mostly just rank states by whether they have an income tax at all. That's an incomplete picture. The real comparison has to look at how each state treats Social Security, pensions, and IRA/401(k) withdrawals separately, since a state can be excellent for one income source and unremarkable for another.

Nine states have no income tax whatsoever: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. In these states, the retirement-tax comparison is simple, there is no state tax on any income source, period. Beyond those nine, the picture becomes more nuanced fast. Most of the remaining states plus DC have moved to fully exempt Social Security benefits from state tax, following a long, multi-decade trend, though a shrinking handful still tax it, usually with income- or age-based carve-outs similar to the approach Colorado and New Mexico use.

Pension and retirement account treatment is where states diverge the most, and where most generic rankings fall short. Some states, California among them, tax pension and IRA/401(k) withdrawals exactly like wage income, with no retirement-specific break at all (aside from a narrow military pension exclusion). Others, Colorado and New Mexico among them, provide meaningful age-based subtraction amounts that shelter a real chunk of retirement account income from state tax. Arizona takes a different approach entirely for one specific income type: it doesn't tax Social Security or military retirement pay at all, but taxes other retirement account withdrawals as ordinary income under its flat 2.5% rate.

This is why the 'best' state genuinely depends on your income mix, not a fixed ranking. A retiree living primarily on Social Security and a modest pension experiences a completely different tax picture across these states than a retiree drawing $150,000 a year from a large IRA. The same state can be the obvious choice for one household and a mediocre one for the other.

For Singh PWM's clients, most of whom are based in or considering Arizona, the practical comparison set isn't all 50 states, it's Arizona against the handful of states people are actually comparing it to: Nevada and New Mexico as neighboring low-or-no-tax alternatives, California as the state the largest share of Arizona's new retirees are actually moving from, and Colorado as a common comparison for households also considering the mountain west. The table below focuses on those five.

Income tax is also only one piece of the total retirement cost picture. Property tax, sales tax, and, in a small number of states, an estate or inheritance tax, all factor into the real comparison. Nevada's lack of income tax is offset somewhat by a higher-than-average combined sales tax; California's high income tax rates are offset somewhat by Proposition 13's caps on property tax growth for longtime homeowners. None of the five states in the table below have a state-level estate or inheritance tax.

Domicile and residency rules also determine which state's numbers actually apply to you in a given year, a detail generic rankings never touch. Each of these five states looks at where your driver's license, voter registration, and primary home actually are, not just where a vacation property sits, and a large income event, a Roth conversion, a business sale, recognized before a genuine change of domicile is still taxed by the state you were leaving, not the one you're headed to. This is covered in more depth in the state-specific and relocation pages linked below.

If you're comparing where to retire or where to move, run your actual projected income sources, expected Social Security benefit, pension amount, and planned IRA/401(k) withdrawal rate, against each state's specific rules, rather than relying on a generic 'best states' ranking that only accounts for the presence or absence of an income tax.

For most of our clients, the real decision set is the five states in the table below, not a 50-state spreadsheet. If you're relocating from California, moving within the Southwest, or comparing Arizona against Nevada, New Mexico, or Colorado specifically, that's the comparison that actually matters, and it's covered in more depth in the state-specific pages linked below.

• Relying on a generic 'best states for retirement taxes' ranking that only accounts for whether a state has an income tax, without checking how it treats your specific income sources.
• Not factoring property tax, sales tax, and cost of living into the comparison alongside the income tax picture.
• Treating the 'best' state as a fixed, universal ranking rather than something that depends on your specific mix of Social Security, pension, and retirement account income.
• Moving states without confirming domicile and residency rules, which determine which state can tax the income you recognize in the year of the move.