3 Tax Mistakes Retirees Make (and How to Avoid Them)

Taxes By the RetiPilot Editorial Team · May 12, 2026 · 6 min read

Taxes are one of the largest and most controllable expenses in retirement — yet the costliest mistakes rarely feel like mistakes in the moment.

1. Waiting too long to plan

Many people spend years optimizing investment returns and almost no time on how those dollars will be taxed when they come out. That is a missed opportunity, because in retirement the timing of income is often as important as the size of your portfolio.

Once Social Security and required minimum distributions begin, your flexibility narrows sharply. The most valuable planning usually happens in the quieter, lower-income years right after you stop working, when you can shape your future tax picture on your own terms.

2. Letting income stack up in one year

Retirement income arrives from several places at once: withdrawals, Social Security, pensions, dividends, and capital gains. When too much lands in the same tax year, it can push you into a higher bracket, cause more of your Social Security to be taxed, and even trigger Medicare surcharges known as IRMAA.

Smoothing income across years — through partial Roth conversions or simply sequencing withdrawals with intention — can keep you in a lower bracket and reduce the total tax you pay over retirement, not just in a single year.

3. Treating every account the same

A dollar in a traditional IRA, a Roth IRA, and a taxable brokerage account are taxed in three very different ways. Ignoring that difference is one of the most expensive habits in retirement.

A common starting framework is to spend from taxable accounts first while using low-bracket years to convert or withdraw from tax-deferred accounts, leaving Roth dollars to grow. The right order depends on your income, goals, and tax bracket — but having an order at all puts you ahead of most retirees.