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COLA

Why Your Social Security Payment May Not Rise by the Full COLA

The 2026 Social Security COLA is 2.8%, but your gross benefit and net deposit may rise by a different amount. Here’s how to check the calculation, deductions, and withholding.

By TheFinanceBase Team 3 min read
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The 2026 Social Security cost-of-living adjustment (COLA) is 2.8%, but your monthly bank deposit may rise by a different amount. Social Security applies the adjustment to your benefit calculation—not directly to the amount you received after deductions. Rounding, Medicare premiums, or separate withholding can make the increase in your gross benefit or net deposit differ from 2.8%.

What the 2026 COLA changes—and when

The Social Security Administration (SSA) announced a 2.8% COLA for 2026, based on the change in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) from the third quarter of 2024 through the third quarter of 2025. The adjustment applies to Social Security benefits payable in January 2026. SSA’s 2026 COLA fact sheet gives the schedule and context.

The COLA is not a guarantee that the amount deposited into every recipient’s bank account will increase by precisely 2.8%. SSA’s explanation of how it applies the COLA to a retirement benefit notes that rounding, offsets, and final truncation can make the new monthly benefit differ somewhat from the COLA.

How SSA calculates your adjusted benefit

SSA starts with your primary insurance amount (PIA), the amount used to calculate your benefit at full retirement age. It raises the PIA for the COLA and truncates it to the next lower dime. SSA then applies the factor associated with claiming early or receiving delayed retirement credits, subtracts applicable offsets, and truncates the resulting monthly benefit to the next lower dollar.

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That sequence matters: the published COLA is not simply multiplied by your prior net payment. The PIA, retirement factor, offsets, and rounding all affect the result. A modest difference in the calculated gross benefit can therefore occur even when no deduction changes.

Why your deposit may increase by less

A deduction can change separately from the COLA

Your gross Social Security benefit is not necessarily the same as your net deposit. A Medicare Part B premium deducted from Social Security is one example of an offset SSA identifies. If a premium or another listed deduction changes, the amount deposited can rise less than the gross benefit—or even fall—despite the COLA.

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For 2026, the standard Medicare Part B premium is $202.90 per month, according to the SSA’s 2026 Trustees summary. That is a standard-premium figure, not a statement of what every person pays; an individual’s premium and withholding may differ. Medicare Part B premiums are not set by the Social Security COLA formula.

Withholding can affect a particular payment period

The retirement earnings test is separate from the COLA calculation. If you receive retirement benefits before full retirement age and have earnings above the applicable annual exempt amount, SSA withholds benefits under the test. For 2026, the exempt amount is $24,480 for someone under full retirement age throughout the year. It is $65,160 for someone reaching full retirement age during 2026, and that higher limit applies to earnings before the month full retirement age is reached. These limits concern earnings-test withholding, not the percentage added by the COLA. See SSA’s guidance on working while receiving retirement benefits.

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How to find out what changed in your case

  1. Open your COLA notice. SSA sends notices by mail and makes them available in the Message Center of a my Social Security account. The notice shows your new benefit amount and deductions.
  2. Compare the benefit amount with the deposit. Check whether the gross benefit changed as shown in the notice, then compare the deduction lines and the amount deposited. A change in a deduction can explain why the deposit did not rise by the same percentage.
  3. Check for separate withholding. If you work while receiving retirement benefits and are below full retirement age, consider whether the retirement earnings test applies to your payments.
  4. Contact SSA if the notice does not account for the difference. An individual notice is more useful than an average or a general COLA percentage for explaining your benefit record. The COLA alone cannot identify every possible case-specific deduction or withholding.
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Why averages do not predict your increase

SSA estimates that the average monthly retirement benefit will move from $2,015 before the 2026 COLA to $2,071 after it. These are rounded national averages published in its 2026 fact sheet, not a calculation for any particular beneficiary. Your work history, claiming age, deductions, and withholding determine your own amount.

The announced COLA also does not measure each beneficiary’s personal inflation experience. It is an adjustment based on the CPI-W formula, not a promise that every household’s costs—or net Social Security deposit—will rise by the same percentage.

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