What nobody tells you about saving too much in a 401(k)

Here's a scenario nobody prepares you for.

You spend thirty years doing everything right. Contributing to your 401(k). Not touching it. Watching it grow. Reinvesting dividends. Staying the course through every market cycle.

Then you turn 73 — and the government tells you to start taking money out. Not because you need it. Not because you want it. Because they require it.

Required Minimum Distributions — RMDs — are the IRS's way of collecting the taxes you deferred for decades. Every dollar you put into a traditional 401(k) was pre-tax. The government was patient. But at 73, their patience runs out.

Starting that year, you must withdraw a minimum amount annually — calculated by dividing your account balance by an IRS life expectancy table. At 73, the denominator starts at 26.5 — roughly $3,774 for every $100,000 in your account. By 93, that number jumps to $9,901 per $100,000. The older you get, the larger the mandatory withdrawal.

And every dollar counts as ordinary income.

A retiree who planned carefully might find themselves in a higher bracket than they expected — simply because their 401(k) grew too well.

RMDs stack on top of every other income source — Social Security, pension payments, interest, capital gains. Together, those sources determine your federal tax bracket for the year.

A single retiree whose RMD pushes income from $100,000 to $110,000 could pay an additional $888 per year in Medicare Part B premiums alone. For married couples, crossing the second IRMAA tier means over $4,400 annually in additional premiums — triggered by a single dollar over the threshold. The penalty for failing to take your RMD? 25% of the amount not withdrawn.

None of this means your 401(k) was a mistake. It almost certainly wasn't. But it does mean that the decisions you make in your 40s and 50s — about account types, Roth conversions, contribution strategies — have consequences that show up thirty years later in ways that are hard to undo.

One strategy: if you're concerned your RMD income may push you into a higher tax bracket, you can make penalty-free withdrawals from tax-deferred accounts once you reach age 59½ — taking smaller distributions earlier reduces the balance and the mandatory withdrawals later.

The point isn't to optimize every dollar. The point is to know the rules before the rules catch you off guard.

— Daniel Mercer

Founder, The Provider