Retiree's 401(k) Tax Bill Comparison

Retiree's $350k 401(k) leaves tax bill 2.7x higher for son in 32% bracket than parents in 12% bracket.

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Oct 19, 2026

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Retiree's 401(k) Tax Bill Comparison

Retiree's $350k 401(k) leaves tax bill 2.7x higher for son in 32% bracket than parents in 12% bracket.

In brief

Retiree's $350k 401(k) leaves tax bill 2.7x higher for son in 32% bracket than parents in 12% bracket. A retiree in the 12% federal tax bracket who dies with $350,000 in a 401(k) and leaves it to a son in the 32% bracket faces a tax bill 2.7 times higher than if converted to Roth over ten years. Originally reported by…

Retiree's 401(k) Tax Bill

A retiree in the 12% federal tax bracket dies with $350,000 in a 401(k) and leaves it to a son in the 32% bracket.

Typical 401(k) Balance

Fidelity's data shows average 401(k) balances at $251,400 for savers aged 65 to 69 and $250,000 for those 70 and older.

Pre-Tax 401(k) Balance

Pre-Tax 401(k) Balance

Almost all $350,000 is pre-tax, as only 12.2% of Baby Boomers use a Roth 401(k).

Son's 10-Year Tax Rule

The son must fully distribute the account within 10 years, taxed at 32% per year.

Son's 10-Year Tax Bill

The son's $35,000 annual withdrawal costs $11,200 in federal tax over ten years at 32%.

Parents' Roth Conversion

Parents could convert $35,000 annually at 12% for $4,200 in federal tax per year.

Tax Bill Comparison

The son's tax bill is 2.7 times the parents' bill, a $70,000 difference over ten years.

Growth Impact

Growth inside a converted Roth is tax-free, while inherited traditional 401(k) growth is taxed at the son's rate.

Family Action Steps

Families can compare brackets, convert up to the 12% bracket ceiling, and pay tax from other savings.

Here's the gist

A retiree in the 12% federal tax bracket who dies with $350,000 in a 401(k) and leaves it to a son in the 32% bracket faces a tax bill 2.7 times higher than if converted to Roth over ten years.

Read the original on 24/7 Wall St.

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