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Most people think their tax burden will shrink in retirement. But for many, the opposite is true.

Like a snowball rolling down a mountain, taxes that start small can grow larger and eventually threaten to bury your income, your retirement quality and your legacy.

Even though the One Big Beautiful Bill (OBBB) preserved much of today’s lower-rate environment, that doesn’t mean retirees are in the clear.

The U.S. still faces record debt levels, growing entitlement obligations and a complex web of hidden taxes that quietly chip away at retirement income. The avalanche risk hasn’t disappeared; it’s just less obvious.

Where the avalanche starts

The “tax avalanche” doesn’t begin with a sudden policy change. It begins with success: A career of disciplined saving in tax-deferred accounts such as 401(k)s and IRAs. Every dollar that grows in those accounts is a future tax liability.

Once you begin required minimum distributions (RMDs), those withdrawals are taxed as ordinary income, and that can push you into higher brackets just when you thought life would slow down.

It’s not just income taxes that take a bite. RMDs can cause up to 85% of your Social Security benefits to become taxable and can trigger higher Medicare premiums through income-related monthly adjusted amount (IRMAA) surcharges. Those extra costs can quietly add thousands to your annual tax bill.

Then comes spousal tax risk, a tax hazard few couples anticipate.

When one spouse passes away, the surviving partner’s filing status changes from “married, filing jointly” to “single,” effectively cutting the standard deduction in half and accelerating bracket creep.

The widow’s penalty can raise taxes just as household income drops.

Why the danger is growing

Even without the looming “sunset” that once defined tax headlines, rates are unlikely to stay this low forever. The government’s long-term obligations, such as Social Security, Medicare and rising interest on the national debt, will eventually demand higher revenue.

Future tax increases might not come from higher brackets alone; they can emerge through stealthier channels such as deduction limits, surtaxes or benefit phaseouts.

Meanwhile, demographic shifts mean more retirees are drawing income from the same tax-deferred sources. The system itself is built to collect more as people live longer and rely more heavily on retirement accounts.

That’s why proactive planning remains just as crucial today as it was before the bill.

How to slow (or stop) the slide

You can’t stop snow from falling, but you can build barriers that keep it from becoming destructive. Here are practical ways to control the slope before small issues turn into a tax avalanche.

Diversify your tax buckets. Balance savings among taxable, tax-deferred and tax-free accounts. This flexibility lets you draw from the most efficient source each year to manage your tax bracket and control how much income appears on your return.

Use strategic Roth conversions. With today’s rates still historically low, small, controlled Roth conversions can move money from taxable territory to tax-free growth. Spreading conversions over several years helps you manage brackets and avoid Medicare or Social Security taxation surprises.

Monitor RMD exposure. Project future RMDs early (ideally before you turn 73) and look for opportunities to reduce account balances through partial withdrawals, Roth conversions or qualified charitable distributions (QCDs). A little foresight can prevent forced distributions later.

Plan for the surviving spouse. Model what your taxes would look like if one spouse passes away. Consider converting more while both spouses are alive, reviewing beneficiary designations and maintaining enough liquid assets for flexibility during life transitions.

Manage your income thresholds. Watch the breakpoints for Social Security taxation and IRMAA brackets. Staying below those levels can reduce your total tax drag without changing your lifestyle.

Review annually. Tax rules, healthcare costs and personal circumstances shift constantly. An annual review with your financial professional helps you stay nimble and ahead of potential changes.

Avoid the ‘do nothing’ trap

Many retirees assume that because the OBBB extended the current tax framework, they have time to relax. But procrastination can quietly narrow your options.

Once RMDs start or a spouse dies, it’s harder to melt the snowball. Taxes can compound just as investments do, only in reverse.

Think of each dollar you move strategically as a shovel of snow cleared from the slope. It might not seem like much now, but over time, it can mean the difference between staying above the surface and being buried by unintended consequences.

The bottom line

A tax avalanche isn’t triggered by one bad decision; it’s caused by inertia. The risk comes from doing nothing and assuming that today’s lower rates will last forever.

Even in a post-OBBB world, retirees face growing hidden liabilities: RMDs, spousal penalties and income-based surcharges that add complexity to every withdrawal.

The goal isn’t to avoid taxes altogether, but to pay them smartly, over time, in ways that protect your income and your family’s future.

Don’t wait. With proactive planning, diversification and steady guidance, you can keep the avalanche in check and enjoy a retirement that feels stable, predictable and secure.

This article was written by and presents the views of our contributing adviser, not the Kiplinger editorial staff. You can check adviser records with the SEC or with FINRA.

© 2026 The Kiplinger Washington Editors, Inc. Distributed by Tribune Content Agency, LLC.