A Social Security cost-of-living adjustment (COLA) raises the benefit calculation; it does not set or raise the Medicare Part B premium. But if you pay Part B premiums through Social Security, the premium is deducted from your benefit before payment. Your 2026 deposit therefore depends on both your adjusted benefit and the deductions that apply to you—not on the COLA percentage alone.
For 2026, the Social Security Administration (SSA) announced a 2.8% COLA, while the standard monthly Part B premium is $202.90. Some people pay more because of an income-related monthly adjustment amount (IRMAA). A separate rule, called hold harmless, protects some beneficiaries from a Part B premium increase reducing their Social Security payment below its previous amount. Your own SSA notice shows the individual calculation.
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What changes when the COLA takes effect
There are two separate amounts to keep straight: your gross Social Security benefit and the Part B premium deducted from it. The COLA applies to Social Security benefits. Part B premiums are set separately under Medicare’s premium rules and can change independently of the COLA.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteIf your Part B premium is withheld from your Social Security benefit, your deposited payment is the benefit remaining after that premium and any other applicable deductions. A higher gross benefit can therefore produce a smaller increase in the amount deposited. It does not follow that Medicare has taken the COLA itself, or that the COLA percentage should be applied to your net deposit.
The 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. It applies to Social Security benefits received in January 2026. The final increase in an individual’s monthly benefit may not equal precisely 2.8%, because SSA applies the COLA within its benefit formula and rounds or truncates amounts.
2026 figures: COLA, Part B premium and IRMAA threshold
| Item | 2026 figure or rule | What it means |
|---|---|---|
| Social Security COLA | 2.8% | SSA announced this adjustment in 2025 using the CPI-W change from Q3 2024 to Q3 2025. Benefits with the adjustment are received beginning in January 2026. |
| Standard monthly Part B premium | $202.90 | This is the standard premium for 2026 coverage. A person’s amount can be higher if IRMAA applies. |
| MAGI threshold for standard premium | $109,000 for an individual; $218,000 for a joint filer | For 2026, people at or below the applicable threshold pay the standard premium, subject to their circumstances. Above it, the Part B premium increases by income tier. |
| Income information generally used for 2026 IRMAA | 2024 tax information | SSA uses the most recent IRS information available, generally the return from two years earlier. |
The $202.90 figure is the standard premium, not a promise that every beneficiary will have exactly that amount deducted. The full income-tier schedule is published by SSA on its Medicare premiums page. An individual’s premium and payment arrangement determine what is actually withheld or billed.
Why the net Social Security payment may rise by a different amount
SSA does not simply multiply the amount you currently receive in your bank account by the COLA percentage. The COLA is applied to the primary insurance amount, after which benefit rules—including adjustments for claiming before or after full retirement age—affect the result. SSA then accounts for applicable deductions, such as the Medicare Supplementary Medical Insurance premium, and applies rounding or truncation. Those steps can make the change in the final monthly benefit differ from 2.8%.
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The Part B premium is another calculation, not a percentage deducted from your COLA. The amount withheld depends on the premium that applies to you, whether you have an income-related adjustment, and whether you pay the premium through benefit withholding. Other deductions or offsets can also affect the deposited amount. As a result, neither the COLA rate nor the standard premium by itself is enough to calculate your new deposit.
A useful way to compare the two months
- Compare gross benefits. Look at the old and new Social Security benefit amounts before deductions on your SSA notice. The new amount reflects SSA’s COLA calculation and benefit rules.
- Compare Part B amounts. Check the Part B deduction for each month, including any IRMAA. Do not assume the standard premium applies if your notice lists a different amount.
- Account for other deductions. Include any other items shown on the notice that affect your payment.
- Use the resulting net amount. The difference between the two deposits is the practical change in what you receive. It cannot be derived reliably from the 2.8% figure alone.
When IRMAA can make the Part B deduction higher
IRMAA is an income-related monthly adjustment amount added to the standard Part B premium for people whose income is above the applicable threshold. The determination depends on modified adjusted gross income (MAGI) and tax filing status, not simply on whether someone received a COLA.
For this purpose, SSA defines MAGI as adjusted gross income (AGI) plus tax-exempt interest. For 2026 premiums, SSA generally uses 2024 tax information because it relies on the most recent IRS data available, usually information from two years earlier. A change in the amount of Social Security benefit due to COLA does not by itself establish that your tax-year MAGI crossed an IRMAA tier.
If your income has fallen after a qualifying life-changing event, you may ask SSA to reduce the IRMAA determination using Form SSA-44. Whether a reduction is available depends on the circumstances and SSA’s rules; check SSA’s current instructions and form before applying. If the higher premium appears unexpected, compare the income year and filing status used in the determination with your own records rather than assuming the COLA caused it.
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Social Security Act §1839(f) limits a Part B premium increase for certain beneficiaries when that increase would reduce their Social Security payment, after the Part B deduction, below the prior month’s payment. The provision is commonly called hold harmless. It is a protection with eligibility conditions, not a guarantee that every person enrolled in Part B will pay no more or see no reduction in net income.
SSA’s accessible explanation says a beneficiary generally must be entitled to Social Security or qualifying Railroad Retirement benefits for November and December, with Part B premiums deducted from the relevant December and January benefits. The explanation also identifies exceptions: people enrolling in Part B for the first time, people paying IRMAA, and people who are dually eligible for Medicaid when the state Medicaid agency pays the premium. The statutory conditions govern, so an individual should not infer eligibility from the general description alone.
Hold harmless concerns the effect of a Part B premium increase on the qualifying person’s benefit payment. It does not change the COLA calculation or mean that the premium is held at the standard amount for everyone. If you think the provision may apply, check the deduction and payment shown on your own SSA notice or ask SSA to explain your specific determination.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to check your actual 2026 payment
SSA says it mails COLA notices during December, and most beneficiaries who opt in can view the notice online. The notice is the appropriate source for your individualized benefit and deductions; the announced COLA and standard premium are general figures.
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- Find your 2026 COLA notice. Review the notice SSA mailed or the notice available through your online SSA account.
- Identify the new benefit amount and deductions. Read the amounts listed for your benefit, Part B premium, IRMAA if applicable, and other deductions. Keep the gross benefit separate from the net payment.
- Compare with the prior notice or payment record. Compare corresponding monthly amounts, not a gross figure from one notice with a net deposit from another.
- Contact SSA about a discrepancy. If the notice does not match your understanding of your benefit, premium withholding, IRMAA or possible hold-harmless treatment, ask SSA about the specific line item rather than estimating from the COLA rate.
SSA’s 2026 premium information and the personalized notice should be used together: the public premium page explains the standard amount and income tiers, while the notice shows what SSA calculated for you. If you do not have Part B premiums deducted from Social Security, the premium may be paid through another arrangement; the COLA does not determine that payment method.
Common misunderstandings to avoid
- “Part B takes a fixed percentage of the COLA.” It does not. The premium is a separate monthly charge, and the deduction is not calculated as a share of the COLA.
- “Everyone pays $202.90.” That is the 2026 standard monthly premium. IRMAA can increase the amount, and an individual’s coverage and payment details matter.
- “The COLA automatically causes IRMAA.” IRMAA is based on MAGI and filing status, generally using tax information from two years earlier. The COLA alone does not determine whether a tier applies.
- “Hold harmless applies to every Part B enrollee.” The rule has qualifying conditions and exceptions, including first-time Part B enrollment and IRMAA cases.
- “The announced rate tells me the exact deposit.” SSA’s formula, premium, other deductions, and individual status all affect the net payment. Use the notice for the exact amount.
Which information is personal, not universal
No general 2026 COLA figure can establish a particular beneficiary’s net monthly deposit. The result depends on the person’s benefit calculation, Part B enrollment and payment arrangement, applicable IRMAA, other deductions, and possible hold-harmless eligibility. SSA’s COLA notice or account is the source for that person’s new benefit and deductions.
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