Why Some Social Security Recipients Could See Smaller Tax Refunds

If you receive Social Security benefits and noticed your tax refund feels smaller than expected, you’re not alone. Recent changes and longstanding rules around how benefits are calculated and taxed are catching some retirees and public workers off guard.

Two federal provisions — the Windfall Elimination Provision (WEP) and the Government Pension Offset (GPO) — continue to affect hundreds of thousands of beneficiaries. And when these rules interact with federal income tax formulas, the result can mean lower monthly benefits and smaller refunds at tax time.

If you want to stay up to date on changes like this, BenefitKarma tracks major shifts across Social Security and other government benefit programs so you can plan ahead.

Why is this happening?

Social Security benefits are not always paid at the full amount listed in your earnings statement. In some cases, they are reduced before you ever receive them.

Two key rules drive these reductions:

• the Windfall Elimination Provision (WEP)
• the Government Pension Offset (GPO)

The WEP can reduce your Social Security retirement or disability benefit if you also receive a pension from work where you did not pay Social Security taxes — often certain state or local government jobs.

The GPO can reduce or eliminate Social Security spousal or survivor benefits if you receive a government pension from work not covered by Social Security.

When benefits are reduced under WEP or GPO, your total annual Social Security income may be lower than expected. At the same time, up to 85% of Social Security benefits can still be taxable depending on your overall income. That combination can shift how much is withheld and how much you receive back as a refund.

How many people are affected?

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The impact is significant. As of recent federal data:

• About 1.6 million people are affected by the WEP
• Roughly 694,000 people are affected by the GPO

That means more than 2 million beneficiaries nationwide see some type of benefit reduction tied to these provisions.

Because tax withholding on Social Security is optional and based on estimates, many recipients do not realize the full impact until filing season — when refunds may come in lower than expected or taxes owed may be higher.

It’s also important to remember that these numbers change over time as retirees enter or leave the system and as Congress debates possible reforms.

How Social Security taxes affect your refund

Here’s where it gets confusing.

Social Security benefits become taxable once your “combined income” exceeds certain thresholds:

• $25,000 for single filers
• $32,000 for married couples filing jointly

Combined income includes:

• Adjusted gross income
• Nontaxable interest
• Half of your Social Security benefits

If you also receive a pension affected by WEP or GPO, that pension counts toward your income calculation. That can push more of your Social Security into the taxable range — even if your actual monthly benefit is reduced.

If you did not have enough taxes withheld during the year, your refund could shrink or you could owe money.

What should you do?

First, confirm whether you are subject to WEP or GPO. If you worked in government employment that did not pay into Social Security, you may be affected.

Second, review your Social Security benefit statement and your most recent tax return. Look at:

• How much of your Social Security was taxable
• Whether federal taxes were withheld
• How much pension income you reported

You can request voluntary federal withholding on Social Security payments using IRS Form W-4V if you want to avoid surprises next year.

Finally, consider speaking with a tax professional if you receive both a pension and Social Security benefits. Even small adjustments in withholding can make a difference at refund time.

The bottom line

WEP and GPO have been part of Social Security law for decades, but their impact continues to surprise many retirees — especially when tax season arrives.

While these rules were designed to adjust benefits for workers who also receive certain pensions, the ripple effect can mean lower monthly payments and smaller tax refunds.

The key is awareness. Understanding how your pension, Social Security benefits, and federal taxes interact can help you plan more accurately and avoid surprises.

BenefitKarma will continue tracking changes across Social Security and other major benefits programs so you can stay informed and make confident financial decisions.