The 2026 Social Security cost-of-living adjustment (COLA) is 2.8%. It raises the gross Social Security benefit payable in January 2026, but it does not set or freeze your Medicare deductions. Your actual deposit is your adjusted benefit minus applicable Part B, Part D, IRMAA and other deductions. The standard 2026 Medicare Part B premium is $202.90 per month; people subject to income-related adjustments can owe more. Your personal COLA notice and Medicare premium determination provide the exact result.
What the 2026 COLA changes
SSA applies the 2026 COLA to Social Security benefits payable in January 2026. The adjustment is 2.8%, so the gross benefit is multiplied by 1.028. The increase is calculated under the statutory CPI-W method, not from your household budget, Medicare premium or personal inflation rate.
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SSA explains that “The Social Security Act specifies a formula for determining each COLA.” The formula uses the change in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) between the third quarter of 2024 and the third quarter of 2025. SSA identifies CPI-W as the official measure used to calculate COLAs. See the 2026 SSA COLA Fact Sheet and the SSA explanation of the latest COLA calculation.
When the increase appears
The COLA technically begins with December 2025 benefits, which are generally paid in January 2026. For most beneficiaries, the practical comparison is therefore the December 2025 payment with the January 2026 payment. Payment dates can differ by benefit type and birth date, so use the payment date shown in your own account rather than assuming every recipient is paid on the same day.
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Gross benefit versus money deposited
The COLA applies to the benefit amount before deductions. It does not promise that the bank deposit will be 2.8% higher. Medicare premiums can be withheld from Social Security, and a beneficiary may also have other authorized deductions. If a premium rises or an income-related surcharge applies, part of the gross increase can be absorbed before payment reaches your account.
How to calculate the change in your own payment
Start with the gross monthly Social Security benefit used for the COLA, not the prior net deposit. Multiply that gross amount by 0.028 to find the COLA increase, then add the increase to the prior gross benefit. Finally, subtract the Medicare amounts and other deductions that apply to the new payment.
- Record the prior gross benefit. Your COLA notice shows the benefit figure used for the adjustment.
- Calculate the gross increase. Multiply the prior gross benefit by 0.028.
- Calculate the new gross benefit. Add the increase to the prior gross amount, allowing for any rounding shown by SSA.
- Identify Medicare deductions. Check whether Part B, Part D-related amounts or IRMAA are withheld, billed separately or paid through another arrangement.
- Compare with the notice. Use the individualized SSA and Medicare figures as the authoritative amounts for your case.
Illustration using a hypothetical benefit
Suppose a person’s prior gross benefit is $2,000 per month. A 2.8% COLA produces a $56 gross increase ($2,000 × 0.028), making the illustrative gross benefit $2,056. If that person has the standard 2026 Part B premium withheld and no other deductions, the amount after Part B would be $1,853.10. This is only a calculation example: the person’s actual Part B amount, Part D costs, withholding choices and benefit could differ.
A useful general formula is:
new net payment = (prior gross benefit × 1.028) − new Medicare deductions − other deductions.
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If a Medicare deduction changes, the net change is the gross COLA increase minus that deduction change. There is no universal Medicare offset that can be subtracted from every beneficiary’s COLA.
2026 Medicare Part B premiums and the COLA
The standard Medicare Part B premium for 2026 is $202.90 per month, according to SSA’s Medicare premiums information. “Standard” means the base amount for beneficiaries who are not charged an income-related adjustment. It does not mean every Social Security recipient has $202.90 deducted from a check.
Your Part B premium may be handled through Social Security withholding, direct Medicare billing or another approved arrangement. A Medicare Advantage or prescription-drug plan can also have its own premium and payment method. Those plan premiums are separate from the standard Part B amount and should not be assumed to be included in the COLA calculation.
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- Your gross benefit may be higher by 2.8%, while Part B is deducted at $202.90 or at an income-related amount.
- Part D or Part B IRMAA can add charges for beneficiaries above the applicable income thresholds.
- A Medicare premium may be billed directly rather than withheld, so the bank deposit and the total monthly Medicare cost can tell different stories.
- Rounding and the specific benefit record can produce a result that is a few cents different from a hand calculation.
IRMAA: when income raises Part B and Part D costs
The income-related monthly adjustment amount (IRMAA) is an additional charge for Medicare Part B and Part D. It is separate from the COLA. A 2.8% COLA does not itself move you into an IRMAA bracket, and receiving a larger Social Security check does not automatically create an IRMAA surcharge.
For the 2026 determination, SSA generally uses modified adjusted gross income (MAGI) from tax year 2024. If 2024 information is unavailable, the applicable table can use 2023 information. Filing status matters, so the threshold for a joint return is not the same as the threshold for a single return. SSA’s IRMAA sliding-scale tables show the income bands and corresponding adjustments.
What to do after a qualifying income drop
If your income has fallen because of a qualifying life-changing event, you can ask SSA to reconsider the income-related amount using Form SSA-44. Examples of events recognized by SSA can include circumstances such as retirement or work stoppage, but SSA must decide whether the event and your evidence qualify. A lower current income by itself does not guarantee that IRMAA will be reduced.
- Review the IRMAA determination to identify the tax year and filing status SSA used.
- Gather documentation of the life-changing event and your reduced income.
- Complete Form SSA-44 and submit it through the channel SSA instructs for your case.
- Keep the determination and any revised notice so you can verify which months and premiums changed.
Published average benefits are not personal forecasts
SSA published the following estimated average monthly benefit amounts for January 2026. They are population averages, not promises for an individual and not amounts to substitute for your own COLA notice.
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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →| Beneficiary group | Before 2026 COLA | After 2.8% COLA | What the figures mean |
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| All retired workers | $2,015 | $2,071 | SSA estimated average monthly benefit for January 2026, before Medicare deductions |
| All disabled workers | $1,586 | $1,630 | SSA estimated average monthly benefit for January 2026, before Medicare deductions |
The averages can differ from an individual’s record because earnings history, claiming choices, benefit type and deductions vary. They also do not show whether a person pays standard Part B, IRMAA or premiums through a separate billing method.
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How to verify your exact COLA and premium
SSA makes COLA notices available online to most beneficiaries through the Message Center in a my Social Security account and also mails notices. Use the following review process rather than relying on an online calculator or an average benefit.
- Open the COLA notice. Confirm the prior benefit, the 2.8% adjustment and the new gross amount.
- Check the payment schedule. Make sure the first payment reflecting the adjustment is the payment for benefits payable in January 2026.
- Locate Medicare information. Identify the Part B amount, whether IRMAA is listed, and whether Part D IRMAA is billed or withheld separately.
- Compare the tax-year information. If IRMAA applies, verify the filing status and MAGI year used in the determination.
- Compare the deposit. Match the net amount in the notice with the bank deposit after allowing for payment timing and any other authorized deduction.
- Contact the issuing agency when figures conflict. SSA handles Social Security benefit and IRMAA determinations; Medicare materials explain coverage and billing. Keep copies of notices and records of calls.
Common situations and how to interpret them
My check rose by less than 2.8%
That can occur when Medicare deductions or another withholding amount increased. Recalculate from the gross benefit, then compare the old and new deductions. Comparing only the two bank deposits hides the separate COLA and premium changes.
I pay more than $202.90 for Part B
The $202.90 figure is the 2026 standard premium. An IRMAA determination can raise Part B, and Part D IRMAA can add a separate amount. Check the income-related notice and the filing status and tax year used.
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My premium is billed instead of withheld
A direct Medicare bill does not remove the premium from your monthly budget; it only changes where you pay it. In that situation, the Social Security deposit may look closer to the gross increase even though your total monthly costs include the separately billed premium.
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My income is lower now than the tax year SSA used
Review whether the change resulted from a qualifying life-changing event and ask SSA about Form SSA-44. SSA—not a calculator or a tax estimate—decides whether the evidence supports a revised IRMAA amount.
Keeping the figures current
COLA and Medicare premium amounts are annual figures. The 2026 numbers in this article should not be carried forward to another year. In the official material available as of October 10, 2026, the 2027 COLA had not yet been established; SSA said it would announce the next adjustment in October 2026. Check the SSA COLA page for the official announcement and current notices before making a future-year budget.
For broader explanations of Medicare benefits, costs, rights, protections and plan questions, use Medicare’s free Medicare & You handbook. For an individual benefit, premium or IRMAA dispute, your SSA and Medicare notices remain more authoritative than a general guide.
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