Planning for retirement feels like crossing the finish line after a marathon. You’ve saved diligently, watched your accounts grow, and finally reached that magic number.
But here’s the thing nobody mentions at retirement parties: Uncle Sam isn’t done with you yet.
The tax code doesn’t retire when you do. Some of the most common retirement moves can trigger tax bills that blindside even savvy savers. Whether you’re already retired or counting down the days, understanding these potential tax traps can save you thousands — and plenty of headaches.
1. Withdrawing from retirement accounts in the wrong order
The sequence of your withdrawals matters more than most retirees realize. Tapping the wrong account at the wrong time triggers unnecessary taxes and reduces the longevity of your retirement savings.
Traditional wisdom suggests withdrawing from taxable accounts first, then tax-deferred accounts like traditional IRAs, leaving Roth IRAs for last. But this isn’t always optimal. Sometimes taking strategic withdrawals from tax-deferred accounts in low-income years makes sense, especially if you’re delaying Social Security.
Consider a retiree with $500,000 split between taxable, traditional IRA, and Roth accounts. Draining the taxable account first might seem logical, but it could lead to significant required minimum distributions (RMDs) and tax bills later.
A proportional withdrawal strategy or careful tax bracket management can work better.
2. Converting traditional IRAs to Roth IRAs without planning
Roth conversions have become the retirement planning strategy du jour, and for good reason. Tax-free growth and withdrawals in retirement? Sign me up. But the conversion itself creates an immediate tax bill that can push you into a higher bracket if you’re not careful.
Every dollar you convert from a traditional IRA to a Roth is added to your annual taxable income. Convert $100,000 in one shot, and you’ve just given yourself a six-figure raise in the eyes of the IRS. This can trigger higher Medicare premiums (more on that later) and phase out other tax benefits.
Smart retirees spread conversions over several years, targeting specific tax brackets. They might convert just enough to fill up the 12% or 22% bracket without spilling into the next one. Timing matters too — converting during a market downturn means you’ll pay taxes on a smaller amount that can grow tax-free when markets recover.
3. Forgetting about required minimum distributions
At age 73 (thanks to SECURE Act changes), the IRS forces you to start taking money from traditional retirement accounts, whether you need it or not. These RMDs can push unsuspecting retirees into higher tax brackets.
The penalties for missing RMDs are brutal — 25% of the amount you should have withdrawn, though it drops to 10% if you correct the mistake within two years. According to the IRS, your first RMD can be delayed until April 1 of the year following the year after you turn 73, but that means taking two distributions in one year if you wait.
Many retirees underestimate how large RMDs can grow over time. As your account balance increases and life expectancy tables shorten, required withdrawals balloon. A $1 million IRA at age 73 requires an annual distribution of about $37,000.
By age 80, that same account (assuming 6% growth) demands withdrawals north of $65,000, explains Charles Schwab in their report How RMDs Work.
4. Selling your home without understanding capital gains rules
That house you bought decades ago for $150,000 might now be worth $750,000. Great news for your net worth, potentially painful news for your tax bill if you don’t know the rules.
The IRS offers a generous exclusion for primary residence sales: $250,000 for singles, $500,000 for married couples filing jointly. But you need to meet the ownership and use tests — living in the home for at least two of the five years before selling.
Retirees often stumble when moving to a retirement community or taking extended stays with family, which can jeopardize this exclusion.
Renting out your home for more than three years before selling? You might owe capital gains taxes on much of the appreciation. Some also forget that home improvements increase your cost basis, reducing taxable gains. Keep those receipts for the kitchen renovation and roof replacement.
5. Taking Social Security benefits while still working
Starting Social Security benefits before reaching full retirement age (FRA) while continuing to work can reduce benefits due to the earnings test. In 2025, if you’re under FRA for the entire year, $1 is deducted from your benefits for every $2 earned above $23,400, according to the Social Security Administration.
If you reach FRA in 2025, the limit increases to $62,160, with $1 deducted for every $3 earned over this amount, reports MarketWatch.
It’s important to note that these deductions are not permanent. Once you reach FRA, your monthly benefit is recalculated to account for the months in which benefits were withheld, potentially increasing your monthly benefit amount, the MotleyFool notes.
6. Triggering Medicare premium surcharges
Medicare isn’t free — and for higher-income retirees, the costs can rise sharply due to Income-Related Monthly Adjustment Amounts (IRMAA). These surcharges apply to both Part B and Part D premiums and are based on your modified adjusted gross income (MAGI) from two years prior.
For 2025, individuals with 2023 income above $106,000, or married couples filing jointly with income above $212,000, will pay more each month, according to Medicare. The surcharges increase in tiers, with the highest earners paying over $600 more per month for Part B alone.
What triggers these surcharges? Common culprits include large IRA withdrawals, Roth conversions, the sale of appreciated investments, or even your first RMD. And because of the two-year look-back, a spike in income at age 63 could impact your Medicare premiums at 65.
Some retirees manage these costs by carefully timing their income-producing transactions or filing an appeal with the Social Security Administration (Form SSA-44) if they’ve experienced a qualifying life change — such as retirement, the death of a spouse, or a reduction in work hours.
Understanding how IRMAA works — and planning around it — can save you thousands in retirement healthcare expenses.
7. Claiming Social Security too early
Starting Social Security at 62 might provide needed income, but it permanently reduces your benefits and creates unexpected tax consequences. Your benefits get dinged by up to 30% compared to waiting until full retirement age, according to the Social Security Administration’s website.
The tax implications compound the problem. Lower lifetime benefits mean less tax-efficient income in your later years when you might be forced to take larger withdrawals from tax-deferred accounts. You’re essentially trading Social Security income (tax-free or partially taxable at worst) for fully taxable IRA withdrawals.
Married couples face additional complexity. Claiming early might reduce survivor benefits, leaving your spouse with less tax-efficient income after you’re gone.
Running the numbers with a financial advisor often reveals that delaying Social Security, even if it means spending down other assets first, creates better long-term tax outcomes.
8. Holding the wrong investments in taxable accounts
Asset location — holding the right investments in the right type of account — can save thousands in taxes throughout retirement. Yet many retirees never give it a second thought.
Tax-inefficient investments like bonds, real estate investment trusts (REITs), and actively managed funds that generate regular income belong in tax-deferred accounts. Your taxable brokerage account should hold tax-efficient index funds, ETFs, and stocks you plan to hold long-term.
Getting this backwards means paying ordinary income tax rates on bond interest in your taxable account while missing out on preferential qualified dividend and long-term capital gains rates. A retiree with $100,000 in bonds yielding 5% pays up to $1,850 annually in unnecessary taxes by holding them in the wrong account (assuming a 37% tax rate versus 15% for qualified dividends).
9. Working with pension lump sums incorrectly
That pension lump sum offer looks tempting — a big check you can invest however you want. But taking it incorrectly triggers a massive one-time tax hit.
Direct rollovers to an IRA avoid immediate taxation, but many retirees accidentally trigger taxes by having the check made out to them personally. Even if you deposit it into an IRA within 60 days, your employer must withhold 20% for taxes — unless you request a direct rollover.
Miss that 60-day window, and you owe income tax on the entire amount plus a 10% early withdrawal penalty if you’re under 59½.
Some pensions offer partial lump sums, creating even more confusion. Taking part as cash and rolling the rest sounds reasonable until you realize the cash portion gets taxed at ordinary income rates. For someone in the 24% bracket, a $50,000 cash withdrawal costs $12,000 in federal taxes alone, not counting state taxes.
Making tax-smart moves in retirement
Understanding these tax traps transforms retirement planning from a guessing game into a strategic advantage. Retirees who plan wisely and understand the rules often keep more of their money, even if they don’t save the most.
Start by projecting your retirement income from all sources. Map out when RMDs kick in, when you’ll claim Social Security, and how different withdrawal strategies affect your tax bracket. Consider working with a tax professional who specializes in retirement planning. The few hundred dollars spent on good advice pales compared to the thousands you might save.
Tax laws change, and your situation evolves. What works at 65 might need adjusting by 75. Stay informed, remain flexible, and don’t let tax surprises derail the retirement you’ve worked so hard to build. After all, you’ve earned the right to enjoy these years — keeping more of your money just makes them that much sweeter.
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