Retirement Social Security

Your Social Security Check May Be Smaller Than You Think - Here Are the 4 Deductions Most Retirees Miss

The number you expect isn't always what you receive.

By Adam Palasciano , Edited by Laura Hohenstein

Updated May 16, 2026

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Many retirees may focus on the benefit amount listed in their Social Security statement — but the actual deposit can look different. Once deductions are applied, your monthly Social Security benefits may be noticeably lower than expected, and that gap can catch beneficiaries off guard.

Even if your benefit is around the national average — roughly $2,071 per month as of January 2026 — several built-in deductions can quietly reduce what you take home. Some are automatic, while others depend on your income or financial situation. Understanding where that money goes can help you better plan your retirement income.

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Medicare Part B premiums are deducted automatically

One of the most common deductions is the Medicare Part B premium. For most retirees, this amount is automatically taken out of their Social Security check before the money reaches their bank account.

In 2026, the standard Medicare Part B premium is $202.90 per month.

For someone receiving the average $2,071 monthly benefit, that alone reduces their payment to roughly $1,868. Because it happens automatically, retirees may not always realize how much it affects their net income.

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Income taxes can reduce your benefit

Social Security benefits may also be subject to federal income taxes. For individuals earning a combined income of more than $25,000, or for couples filing jointly earning more than $32,000, up to 85% of your benefits can be taxable.

For example, if a portion of your monthly benefit is taxed, the actual amount you keep could drop further depending on your tax bracket. Some retirees may choose to have taxes withheld directly from their benefits, while others may pay when filing their return. Either way, taxes can quietly reduce what you ultimately receive.

Medicare IRMAA surcharges can increase costs

Higher-income retirees may face additional Medicare costs through IRMAA — the Income-Related Monthly Adjustment Amount. These surcharges apply to Medicare Part B and Part D premiums based on your income from two years prior.

For individuals earning $109,000 or less annually, or $218,000 or less for couples filing jointly, you'll only have to pay the $202.90 Medicare Part B premium. However, if you earn any amount higher than that, the monthly premium increases incrementally to as much as $689.90 for individuals earning $500,000 or more annually and couples filing jointly earning $750,000 or more.

Even a temporary increase in income, such as a large withdrawal or investment gain, can trigger higher premiums. In some cases, IRMAA can add hundreds of dollars per month to health care costs. Because this adjustment is based on past income, it may feel unexpected when it shows up.

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Garnishments can further reduce payments

In certain situations, Social Security benefits can be reduced through garnishments. This may include unpaid federal taxes, child support, or alimony obligations.

The amount that can be withheld may vary depending on the type of debt. While not every retiree is affected, those who are may see a portion of their benefit reduced before it is deposited. These deductions could make a noticeable difference in monthly cash flow.

Small deductions can add up quickly

Individually, each deduction may seem manageable. But when combined, they can significantly reduce your monthly income.

Over time, these reductions may add up to thousands of dollars annually. Understanding the full picture can help you plan more effectively.

Planning ahead can help you keep more of your income

While some deductions are unavoidable, others can be managed with careful planning. Strategies such as controlling taxable income, timing withdrawals, and reviewing Medicare costs can help reduce the overall impact.

Working with a financial advisor or reviewing your income sources regularly can also provide more clarity. Even small adjustments can make a meaningful difference over time, and being proactive can help you maintain more control over your retirement income.

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Bottom line

Your Social Security check may be smaller than the number you initially expect due to a combination of deductions. From Medicare premiums to taxes and potential surcharges, several factors can reduce your monthly payment before it reaches you.

Taking the time to understand these deductions — and planning around them — can help you better manage your finances and set yourself up for retirement with greater confidence.

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