Is Your August Social Security Check Smaller Than Expected? Here's Why

If you count on Social Security as part of your retirement plan, an unexpected drop in your monthly deposit can be unsettling. But when your August check comes in smaller than the benefit amount on your award letter — or smaller than what you received a few months ago — it usually isn’t a mistake.

The figure the Social Security Administration (SSA) calculates as your monthly benefit is a gross amount, and several things can be pulled out of it before the money reaches your account. Here are the four most common reasons your check comes up short, and how to see exactly what’s being deducted.

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Medicare premiums come straight out of your benefit

For most people on Medicare, the Part B premium is deducted directly from their Social Security payment. In 2026, the standard Part B premium is $202.90 a month, up from $185.00 in 2025 — a $17.90 jump that alone makes many checks noticeably smaller this year.

Higher earners pay more through income-related monthly adjustment amounts (IRMAA). Depending on your income, the 2026 Part B premium can range up to $689.90 a month, and IRMAA can add a surcharge to your Part D drug plan too.

If you recently enrolled in Medicare, switched plans, or crossed an income threshold (IRMAA is based on your tax return from two years earlier), your deduction — and the size of the reduction to your check — can change.

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You may be repaying an overpayment

If the SSA determines it paid you more than you were owed, it recovers that money by withholding part of your future benefits. For new overpayment notices dated on or after April 25, 2025, the default withholding rate for Social Security (Title II) benefits is 50% of your monthly payment until the balance is repaid. For Supplemental Security Income (SSI), the default remains 10%.

You don’t have to accept the default. You can call the SSA at 1-800-772-1213 to request a lower withholding rate, ask for a waiver if the overpayment wasn’t your fault and you can’t afford to repay it, or appeal if you believe the overpayment determination is wrong.

Taxes you asked the SSA to withhold

Social Security benefits can be taxable, and many recipients choose to have federal income tax taken out of their payments so they don’t face a bill at tax time. This is voluntary and set up using IRS Form W-4V, which lets you pick one of four flat rates: 7%, 10%, 12%, or 22%.

If your check recently got smaller and you don’t have a new Medicare, overpayment, or garnishment situation, check whether you (or a spouse handling the paperwork) set up or increased voluntary tax withholding. You can start, change, or stop it anytime through your my Social Security account or by filing a new W-4V.

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Your benefits are being garnished

Social Security is protected from most private creditors — a credit card company or medical debt collector generally can’t touch it. But certain government debts can. Through the Treasury Offset Program, the government can withhold benefits for federal non-tax debts and delinquent federal taxes.

One to watch is defaulted federal student loans. The government can garnish up to 15% of a monthly benefit to recover a defaulted loan, though the offset can’t reduce your payment below $750 a month. Note that the Department of Education has temporarily paused the collection of student loans from Social Security while it simplifies repayment options for borrowers.

Garnishment for back taxes works similarly but does not carry that $750 floor.

If you’re at risk, options include loan rehabilitation, a hardship objection, or a total and permanent disability discharge — worth exploring before an offset starts.

How to see exactly what’s being taken out

The fastest way to find out why your check is smaller is to log in to your free my Social Security account at ssa.gov. Your payment details show your gross benefit, the Medicare premium deducted, any tax withholding you elected, and any amount going toward an overpayment. 

If a garnishment is in play, you’ll typically receive a separate notice from the agency collecting the debt.

What to do if the reduction looks wrong

If the deposit is smaller and you can’t identify why, start with your bank to confirm the payment posted correctly, then compare the deposit against the payment details in your my Social Security account. Verify that your direct deposit information, address, and phone number are current. 

If everything checks out but the amount still doesn’t add up, call the SSA at 1-800-772-1213, Monday through Friday, 8 a.m. to 7 p.m. local time.

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Bottom line

A smaller check is far more often the result of a deduction than an error, such as rising Medicare premiums, overpayment recovery, voluntary tax withholding, or a government garnishment. 

Because this senior benefit is a cornerstone of income for so many retirees, it’s worth knowing exactly which deduction applies to you. Your my Social Security account lays out the full breakdown in a few clicks, so you can correct a problem or plan around it.

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