The Tax Mistakes Retirees Make Drawing Down Their Accounts, and the Chain Reaction Behind Most of Them

In the first half of life taxes mostly waited. Contributions went in before tax, growth was deferred, and the return was the same every year. In the second half, money becomes more complicated at exactly the time you want life to become less complicated, and the complication is that a withdrawal is taxed the year you take it, and then keeps going: it changes how much of your Social Security is taxable and what you pay for Medicare two years later. Most drawdown mistakes are the same mistake. Someone takes money without checking what else it touches.

Our article on the seven tax mitigation strategies covers what to do. This one covers what goes wrong, and how to check your own plan before the year ends. Figures and thresholds are left out deliberately; they change annually and your CPA confirms them.

The chain reaction

The same dollar is taxed three ways depending on where it comes from. A traditional IRA or 401(k) withdrawal is ordinary income. A sale in a taxable account is taxed on the gain, at capital gains rates. A qualified Roth withdrawal adds nothing. The withdrawal that lands on the return as ordinary income then feeds two more calculations: provisional income, which decides how much of a Social Security benefit is taxable, and modified adjusted gross income from two years earlier, which sets the Medicare premium tier. One withdrawal, three consequences. Every mistake below is a version of seeing only the first.

1. Following a withdrawal rule instead of a projection

Spend taxable first, then tax-deferred, then Roth. It is the most common rule and it is wrong for many households, because it ignores brackets, the Social Security decision, and whether anything is meant to reach heirs. Two retirees can take the same withdrawal and owe very different tax because one holds mostly pre-tax money and the other mostly Roth. A blended approach, drawing from more than one account type each year to fill a target bracket, often costs less over a lifetime than any fixed order. The right sequence is the output of a projection, not an input to one.

2. Letting required minimum distributions set the bracket

Pre-tax balances carry required distributions at a statutory age, and each year's required amount is a larger share of what remains. A retiree who converts nothing beforehand arrives at that age with the largest possible balance and a government-set withdrawal that decides the bracket for them. Required distributions are the result of a tax plan that was never built.

3. Wasting the gap years

The years between leaving work and the start of required distributions and Social Security are usually the lowest-income years a retiree will have. They are the window for Roth conversions and for harvesting gains at favorable rates. Households that take nothing in those years because they have no required reason to usually pay more over the following twenty. Our article on what changed for retiree taxes in 2026 covers how conversions are sized this year.

4. Crossing a Medicare cliff by a small amount

The Medicare surcharge works as a cliff, not a slope. Income one dollar over a threshold raises the premium for the full year, for both spouses, two years later. A conversion, a large withdrawal, or a capital gain taken in December without a projection is the usual cause. The fix is a year-end income check against the thresholds before any discretionary withdrawal.

5. Forgetting that withholding stopped

A paycheck withheld tax automatically. Pension and IRA distributions withhold only if you set it up, and Social Security withholds only on request. Retirees who do not arrange withholding or make estimated payments meet a large balance due in April, sometimes with an underpayment penalty. The plan should set withholding on each income source in the first year.

6. Ignoring the Social Security trigger

Provisional income, roughly half the benefit plus other taxable income plus tax-exempt interest, determines how much of the benefit is taxed. Each additional dollar of IRA income can make more of the benefit taxable, so the marginal cost of that withdrawal is higher than the bracket suggests. Qualified Roth withdrawals do not count toward provisional income, which is one reason the Roth balance matters in the drawdown years. West Virginia has completed its own exemption of benefits; our article on the 2026 exemption covers it.

7. Giving from the checking account

Once eligible, a retiree can send IRA dollars directly to a qualified charity. The amount counts toward the required distribution and never enters gross income, so it never reaches provisional income or the Medicare calculation. A charitable retiree who writes checks from a bank account while taking the full required distribution as taxable income has paid tax on money that could have been given untaxed.

How to test your own plan

• Project this year's income from every source, then add any withdrawal or conversion you are considering.
• Check the total against the next bracket, the Medicare threshold, and the provisional-income lines, together.
• Confirm withholding is set on each pension and IRA distribution, or that estimated payments are scheduled.
• If you give to charity and have a pre-tax IRA, ask whether the gift should come from it.
• Ask who checked the projection against the estate plan, since a conversion changes what heirs receive and how it is taxed.
• Show the projection to your CPA before the withdrawal is made, not after.

How Beacon does it

At Beacon Wealth Management, retirement income planning and tax mitigation are two of the six areas coordinated in every Financial Summit Map. The withdrawal sequence is set annually from a multi-year projection, conversions are sized to the bracket and the Medicare tiers at the same time, and the plan is reviewed with your CPA before anything is executed. Our article on why the answer is a plan, not a percentage explains how the sequence sits inside the income plan. Advisory services are offered through Cambridge Investment Research Advisors, Inc., a Registered Investment Adviser, and securities through Cambridge Investment Research, Inc., a broker-dealer. None of this is tax advice.

Close to home: Monongah

Monongah is a small Marion County town on the West Fork River a few minutes south of Fairmont, about twenty-five minutes from our Bridgeport office, remembered for the 1907 mine disaster memorialized at the town's heroine statue and the annual commemoration. Many Monongah households are second- and third-generation coal and railroad families, and the retirees we meet there often carry a union or railroad pension, a spouse's Social Security, and a 401(k) from a later career, which is the exact mix where mistake number six, the Social Security trigger, does the most damage when withdrawals are taken without a projection. We meet with Monongah families in person and throughout north-central West Virginia.

At a glance

If any of the seven looks familiar, the fix is the same: run this year's withdrawals through a projection before December. Let's have a conversation. A short discovery call is where the Guided Journey begins.