4 Ways Retirees Could Lose Social Security Benefits in 2026

Why Your Social Security Check May Be Smaller Than You Expect in 2026

Most retirees think of Social Security as a guaranteed, untouchable income stream. You earned it, you filed for it, and now it shows up in your bank account every month. End of story, right?

Not exactly. In my 20 years as a CPA and Enrolled Agent working with retirees, I’ve watched clients lose hundreds—sometimes thousands—of dollars in Social Security benefits they never expected to forfeit. The causes aren’t dramatic. They’re quiet, technical, and almost always avoidable.

With roughly 68 million Americans receiving Social Security benefits as of 2025, according to the Social Security Administration, even small reductions affect an enormous number of households. And as we head into 2026, several rules and thresholds are shifting in ways that could catch you off guard.

Let me walk you through the four most common—and most unexpected—ways retirees could lose Social Security benefits in 2026, along with exactly what you can do to protect yourself.

The Earnings Test Trap: Working Too Much Before Full Retirement Age

This is the single most misunderstood rule I encounter in my practice. If you claim Social Security before reaching your full retirement age (FRA) and continue earning income from work, the SSA will withhold part of your benefits once your earnings exceed a specific threshold.

For 2025, that threshold is $23,400. The SSA withholds $1 for every $2 you earn above that limit. In the year you reach your FRA, the threshold jumps to $62,160, and the withholding rate drops to $1 for every $3 earned above it. These numbers typically adjust upward each year, so the 2026 figures will likely be slightly higher, but the mechanism stays the same.

How This Actually Plays Out

Let’s say you’re 63 in 2026, collecting $1,800 per month in Social Security, and you pick up a consulting gig earning $40,000. If the earnings threshold stays near $23,400, you’d exceed it by roughly $16,600. That means about $8,300 in benefits withheld over the year—nearly five full monthly checks gone.

Here’s the part most people miss: those withheld benefits aren’t permanently lost. Once you reach FRA, the SSA recalculates your monthly benefit upward to account for the months of withholding. But in the meantime, you’re living on less, and the cash flow disruption can be brutal if you haven’t planned for it.

What I tell my clients is simple: if you plan to work before FRA, run the numbers first. Either delay claiming or structure your earnings strategically. For a deeper dive on timing strategies, take a look at How to Maximize Your Social Security Check in 2026.

The Tax Bite: When Uncle Sam Takes a Share of Your Benefits

A surprising number of retirees don’t realize that Social Security benefits can be federally taxed. This isn’t new—it’s been the law since 1983—but the thresholds that determine taxation have never been adjusted for inflation. That means more retirees cross into taxable territory every single year.

Understanding Combined Income

The IRS uses a formula called “combined income” (also known as provisional income) to determine how much of your Social Security is taxable. It works like this:

• Start with your adjusted gross income (AGI)
• Add any tax-exempt interest (yes, even municipal bond interest counts here)
• Add half of your annual Social Security benefits

If your combined income as a single filer exceeds $25,000, up to 50% of your benefits become taxable. Above $34,000, up to 85% is taxable. For married couples filing jointly, the thresholds are $32,000 and $44,000, respectively.

Those thresholds were set in 1983 and 1993. They’ve never moved. According to the IRS, this effectively means inflation pushes more retirees into taxable territory each year—a phenomenon often called “bracket creep.”

A Real-World Example

Consider a married couple with $20,000 in Social Security benefits, $18,000 from a traditional IRA withdrawal, and $8,000 in pension income. Their combined income would be $36,000 ($18,000 + $8,000 + $10,000 half of Social Security). That pushes them past the $32,000 threshold, making a portion of their benefits taxable.

What I see most often is retirees who take a large one-time IRA distribution—maybe to pay off a car or handle a home repair—and inadvertently spike their combined income. Suddenly, 85% of their Social Security is taxable that year, and they owe an unexpected tax bill in April.

The fix? Strategic withdrawal planning. Roth conversions done in the right years, careful timing of IRA distributions, and awareness of how every dollar of income interacts with your Social Security taxation. As I’ve written about before, these stealth reductions are real and measurable—seniors have quietly lost 13.7% of their benefits’ purchasing power over recent years through mechanisms exactly like this.

Medicare IRMAA Surcharges: The Hidden Social Security Deduction

This one is particularly insidious because most retirees don’t connect it to Social Security at all. IRMAA—Income-Related Monthly Adjustment Amount—is a surcharge added to your Medicare Part B and Part D premiums when your income exceeds certain thresholds. And those surcharges are deducted directly from your Social Security check.

How IRMAA Works in 2026

IRMAA is based on your modified adjusted gross income (MAGI) from two years prior. So your 2026 Medicare premiums are determined by your 2024 tax return. The standard Part B premium for 2025 is $185 per month. If your 2023 MAGI exceeded $106,000 as a single filer (or $212,000 for married filing jointly), you’re already paying more.

At the highest IRMAA tier, individuals can pay over $500 per month for Part B alone—nearly triple the standard premium. Add Part D surcharges on top of that, and the total monthly deduction from your Social Security check becomes staggering.

The Income Events That Trigger IRMAA Spikes

Here’s where retirees get blindsided. Common events that spike your MAGI and trigger IRMAA include:

• Selling a home or investment property with a large capital gain
• Converting a traditional IRA to a Roth IRA
• Taking a required minimum distribution (RMD) from a large retirement account
• Receiving a one-time pension payout or severance package
• Earning unexpectedly high interest from CDs or bonds during a high-rate environment

That last point is especially relevant right now. Many retirees locked in 5% CDs in 2023 and 2024, and that interest income is now flowing through to their MAGI. I’ve written about this specific issue in detail—those 5% CDs may be quietly raising your 2026 Medicare premiums.

The good news: if you’ve experienced a qualifying life-changing event—such as retirement, divorce, or the death of a spouse—you can file SSA Form SSA-44 to request that the SSA use a more recent year’s income instead. I’ve helped clients save thousands with this single form.

Overpayment Clawbacks: When the SSA Wants Money Back

This is the scenario that causes the most stress in my office. The SSA sends you a letter stating you’ve been overpaid—sometimes by tens of thousands of dollars—and they want it back. They’ll start withholding your entire monthly benefit until the debt is repaid unless you take action.

Why Overpayments Happen

Overpayments aren’t always your fault. Common causes include:

• The SSA didn’t process a change in your earnings or work status promptly
• You received benefits as a spouse or survivor and your marital status changed without timely notification
• You moved abroad and continued receiving benefits at the domestic rate
• Disability benefits continued after you returned to substantial work
• Administrative errors in calculating your benefit amount

According to a 2024 report from the SSA’s Office of the Inspector General, the agency identified over $11 billion in improper payments in a single fiscal year. While policy changes have aimed to reduce aggressive collection tactics, the reality is that overpayment notices continue to arrive in mailboxes across the country.

What to Do If You Get an Overpayment Notice

First, don’t panic, but don’t ignore it either. You generally have three options:

• Request a waiver: If the overpayment wasn’t your fault and repaying it would cause financial hardship, you can request a waiver using SSA Form SSA-632. In my experience, waivers are granted more often than people assume—but you need to document your financial situation thoroughly.
• Appeal the decision: If you believe the overpayment calculation is wrong, you can file a formal appeal within 60 days of the notice. Request a case review and provide supporting documentation.
• Negotiate a repayment plan: If you do owe the money, you can negotiate smaller monthly withholdings rather than losing your entire check. The SSA will work with you on this, but you have to ask.

I often tell my clients that the worst thing you can do with an overpayment notice is set it aside and forget about it. The SSA’s default is full withholding, and the clock on your appeal window is ticking.

Protecting Your Benefits: A Proactive Approach for 2026

The common thread across all four of these scenarios is that they’re preventable with planning. Here’s what I recommend to every retiree I work with.

Review Your Social Security Statement Annually

Log into your my Social Security account at least once a year. Verify your earnings record, confirm your benefit amount, and check for any notices or flags. Errors in your earnings history can reduce your benefits permanently if you don’t catch them.

Coordinate Income Sources Carefully

Think of your retirement income as an interconnected system, not a collection of separate accounts. Every IRA withdrawal, capital gain, and interest payment affects your tax bracket, your Social Security taxation, and your Medicare premiums. A $10,000 Roth conversion might save you money over the long run—but if it pushes you into an IRMAA bracket, the short-term cost could wipe out years of savings.

Keep the SSA Informed

Report life changes promptly: marriage, divorce, a spouse’s death, moving, returning to work, or leaving the country. The SSA’s systems are slow to catch up, and by the time they do, you could be facing a five-figure overpayment notice.

Work with a Tax Professional Who Understands Retirement

I say this not to drum up business for my profession, but because the intersection of Social Security, Medicare, and tax law is genuinely complex. A general-purpose tax preparer may not flag IRMAA risks or help you optimize the timing of Roth conversions. Look for a CPA or Enrolled Agent who specializes in retirement tax planning.

The Bottom Line on Losing Social Security Benefits in 2026

None of these four ways retirees could lose Social Security benefits in 2026 involve benefit cuts, legislative changes, or the trust fund running dry. They’re all consequences of existing rules interacting with your personal financial decisions. And that’s actually encouraging—because it means you have the power to prevent them.

The retirees I see who do best aren’t the ones with the largest nest eggs. They’re the ones who understand how the pieces fit together and make proactive decisions rather than reactive ones. Whether it’s timing an IRA withdrawal, filing an IRMAA appeal, or simply checking their my Social Security account once a quarter, small actions compound into real financial security.

If inflation is also weighing on your mind—and for most retirees it is—don’t miss our guide on what seniors must do now to protect their retirement savings from inflation. Combining inflation protection with benefit preservation is the most complete strategy I know for a secure retirement.