Retirement income is taxed by three sets of rules at once: the federal formula for Social Security, the withdrawal rules for IRAs and 401(k)s, and each state’s own exclusions. These pieces compare them.
The federal return excludes a 2026 health savings account contribution of up to $4,400 for self-only coverage. California and New Jersey do not: a $65,000 single filer who contributes the maximum is still taxed by either state on all $65,000, whether the money went through payroll or not, and California taxes the account's earnings every year as well.
For the 2026 tax year, eight states tax some Social Security benefits: Colorado, Connecticut, Minnesota, Montana, New Mexico, Rhode Island, Utah and Vermont. Pension and IRA rules spread wider, from Illinois, which subtracts every retirement dollar at any age, to California, which taxes all of it.
Box 1 of a W-2 leaves out a 401(k) or 403(b) deferral. Pennsylvania keeps both in box 16, New Jersey keeps the 403(b), and Ohio cities keep both in box 18, so a $65,000 earner deferring $5,000 can see $60,000 federally and $65,000 for the state.
Before December 31, 2026, an extra $5,000 of 401(k) deferral cuts the $65,000 single filer's federal tax by $600 and the $185,000 filer's by $1,200; harvesting $18,000 of losses saves the second filer $2,970. Pennsylvania taxes the deferral anyway; Illinois does not.
Taxpayers 65 and older deduct an extra $6,000 each through 2028, stacked on the standard deduction and the age-65 addition: for 2026 the layers total $24,150 for a single filer and $47,500 for a couple who are both 65. Each $6,000 shrinks by six cents per dollar of modified AGI over $75,000 ($150,000 joint) and is gone at $175,000 ($250,000 joint).
Section 530A builds the Trump Account as a traditional IRA for children: a one-time $1,000 Treasury deposit for children born 2025 through 2028, after-tax contributions capped at $5,000 a year, and ordinary income tax on the earnings at withdrawal. Growth is tax-deferred, and the widely reported 'tax-free' label is wrong.
Illinois's overhaul of apportionment and foreign-income deductions lives on corporate schedules; the IL-1040 still charges a flat 4.95%, unchanged since July 2017 and constitutionally required to stay non-graduated. What moves an Illinois bill is the exemption allowance ($2,925 for 2026, gone in one step above $250,000 of AGI), the retirement subtraction, and the 5% property tax credit.