$35,915 difference over 30 yearsFor one couple (both 60, $2M, 60/40, $80,000 a year to spend after tax), QuantCalc's 51-state planner study found a median 30-year income-tax bill (federal + state + IRMAA) of $193,780 in New Jersey and $229,695 in North Carolina — New Jersey is the cheaper state by $35,915.
New Jersey vs North Carolina at a glance
| Factor | New Jersey | North Carolina |
|---|---|---|
| State income tax | 10.75% top | 3.99% top |
| Taxes Social Security | No | No |
| Taxes 401(k)/IRA | Yes | Yes |
| State estate/inheritance tax | Yes | No |
| Tax on $100k withdrawal | $0/yr | $2,973/yr |
| Retirement-friendliness | high tax | friendly |
| 30-yr median income tax, federal + state + IRMAA (MC) | $193,780 | $229,695 |
| 30-yr state income tax (MC) | $29,398 | $66,569 |
| 30-yr success rate (MC) | 83.71% | 82.57% |
| Median balance at 90 (MC) | $2,103,155 | $2,007,678 |
The income-tax difference, year by year
The simplest way to see the gap: take a married couple, both 65, whose only income is a $100,000 IRA withdrawal split evenly between them. On that withdrawal New Jersey collects $0 in state income tax and North Carolina collects $2,973 — a difference of $2,973 every year. Both figures are QuantCalc's state tax engine run on the couple's whole 2026 return in each state, so each state's own brackets, deductions, retirement-income exclusions and credits apply. A top rate that starts above $1M, a pension exclusion from age 62, and an inheritance tax. One flat bracket, with the Bailey exemption for qualifying government retirees.
Over a 30-year retirement, QuantCalc's 51-state planner study (one couple, identical portfolio and after-tax spending in both states, only the state changes; every year priced by the planner's federal and state tax engines) puts the median income-tax difference at $35,915.
Beyond income tax
State income tax is only part of the retirement-cost picture. When comparing New Jersey and North Carolina, also weigh:
- Property tax — a tax-free-income state can still have high property tax; factor your home value.
- Sales tax — affects every dollar you spend, not just income.
- Estate / inheritance tax — New Jersey: has one; North Carolina: none. Matters for larger estates.
- Roth conversion cost — converting in the lower-income-tax state of the two cuts the state tax on each converted dollar. See conversion-tax scenarios.
See New Jersey vs North Carolina on your full plan
Free: run your income, withdrawals and Roth conversions through every state's tax code — no signup.
Compare all states →Converting to Roth before or after the move? See the Roth Conversion Planner.
Compare other states
Deep-dive either state: New Jersey retirement tax guide · North Carolina retirement tax guide. Or see the full 50-state comparison and the 51-state Monte Carlo study.
FAQ
Is New Jersey or North Carolina better for retirement taxes?
On income tax, New Jersey is the lighter-tax state. In QuantCalc's 51-state planner study, one couple (both 60, $2M, $80,000 a year to spend after tax) pays a median $193,780 of federal and state income tax and IRMAA over 30 years in New Jersey versus $229,695 in the other — a $35,915 difference on identical income and spending.
Does New Jersey tax Social Security and 401(k) withdrawals?
New Jersey does not tax Social Security benefits and taxes 401(k)/traditional IRA distributions at the state level. A top rate that starts above $1M, a pension exclusion from age 62, and an inheritance tax.
Does North Carolina tax Social Security and 401(k) withdrawals?
North Carolina does not tax Social Security benefits and taxes 401(k)/traditional IRA distributions at the state level. One flat bracket, with the Bailey exemption for qualifying government retirees.
How much would moving from New Jersey to North Carolina save on retirement taxes?
For a married couple, both 65, whose only income is a $100,000 IRA withdrawal split evenly between them, the state income tax is $0 in New Jersey versus $2,973 in North Carolina — $2,973 per year of difference. Over 30 years, the planner study's median income-tax gap was $35,915. Don't forget property tax, sales tax, and estate tax also differ — see the table above.
Last updated 2026-10-28. State tax data 2026 (Tax Foundation + state DoR); the withdrawal figures are QuantCalc's state tax engine. Monte Carlo figures from the QuantCalc 51-state planner study (v2026.3, re-run 2026-10-12, CC-BY-4.0): one couple, both 60, $2M, 60/40, $80,000 a year to spend after tax, in each state. Educational only, not tax advice.