Retiring in Mississippi

Every figure below is sourced to Mississippi’s own publications and dated. Estimates only, and not tax advice.

Retirement tax by state

What your state actually takes from a 401(k) withdrawal, a pension, and Social Security — in dollars, not a yes/no list.

Brokerage account growth

Long-term index-fund growth after expense-ratio drag — and what your state takes from the gains at withdrawal.

Roth vs. Traditional

Decided on the two rates that actually govern it — yours now, and yours at withdrawal, in the state you'll retire in rather than the one you're in.

Contribution limit optimizer

2026 limits, employer match, the 60-63 super catch-up, and whether the Roth catch-up mandate applies to you.

Required minimum distribution

When your RMDs start under SECURE 2.0, how much this year's is, and what missing it costs.

Backdoor Roth pro-rata

What a backdoor Roth conversion would actually cost you in tax — the pro-rata rule most calculators only describe.

Self-directed IRA real estate (UDFI)

The tax a leveraged rental owes inside a self-directed IRA — computed at trust rates, not the rate you'd assume.

Mississippi at a glance

401(k) and IRA withdrawals
Not taxed
From age 59.
Social Security
Not taxed
Top marginal rate
4%
The top of 2 graduated brackets.
Tax year
2026
Brackets are legislated and change on a fixed calendar, so the year matters.
  • Mississippi's rate is mid-phase-down under HB 1 of 2025, the Build Up Mississippi Act: 4.7% in 2024, 4.4% in 2025, 4.0% in 2026, 3.75% in 2027, 3.5% in 2028, 3.25% in 2029, and 3% from 2030. The 2026 figure is correct only for 2026.
  • A MARRIED-FILING-COMBINED SUBTLETY THIS CALCULATOR DOES NOT MODEL. Where both spouses have their own positive taxable income, EACH gets their own $10,000 at 0% — $20,000 in total — because the return splits into Columns A and B. Where only one spouse has income, the couple gets one $10,000. This record applies a single $10,000 to the joint threshold, which overstates the tax for a two-earner Mississippi couple by up to $400.
  • The word 'graduated' in the Department's own materials is now vestigial: with the lower brackets zeroed out from 2022 and 2023, 2026 is functionally a flat 4% above a $10,000 zero bracket.