Why Medicare Part B Premiums Are Rising Faster Than Social Security COLA
The relationship between Medicare Part B premiums and Social Security cost-of-living adjustments creates a recurring financial tension for retirees. Medicare Part B vs Social Security COLA 2026 refers to the gap between the 2.5% Social Security COLA increase and the 9.68% Medicare Part B premium increase, which reduces net purchasing power for millions of beneficiaries.
The structural mismatch between Medicare Part B premium growth and Social Security COLA adjustments stems from two different cost indexes. Social Security benefits are indexed to the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W), which tracks general consumer prices. Medicare Part B premiums, by contrast, reflect actual medical cost growth, including physician services, outpatient care, and preventive services.1
In 2026, the standard Part B premium rises to $206.50 per month, a $21.50 increase from 2025's $185 per month.2 That 9.68% jump far exceeds the 2.5% Social Security COLA for the same year.3 For the average retiree receiving roughly $2,000 per month in Social Security benefits, the COLA provides about $56 per month in additional income — but the Part B premium increase alone consumes $21.50 of that gain before considering any other expenses.3
Healthcare costs have historically grown faster than general inflation. Medical price inflation, increased utilization of services, and new high-cost drugs all contribute to Part B expenditure growth. The hold-harmless provision, which prevents Part B premium increases from exceeding a beneficiary's COLA amount, protects some enrollees but shifts costs to other beneficiaries, including higher-income retirees and new enrollees.
How the 2026 COLA Increase Affects Your Net Benefit After Part B Deductions
Calculating net benefit requires subtracting Medicare Part B premiums from the gross Social Security COLA increase. For a retiree receiving the average monthly benefit of $2,000, the 2.5% COLA adds $56 per month.3 After the $21.50 standard Part B premium increase, the net monthly gain drops to $34.50.
The table below shows net benefit across three benefit levels for beneficiaries paying only the standard Part B premium:
| Monthly Social Security Benefit | 2026 COLA Increase (2.5%) | Part B Premium Increase | Net Monthly Gain | Net Annual Gain |
|---|---|---|---|---|
| $1,500 | $37.50 | $21.50 | $16.00 | $192.00 |
| $2,000 | $50.00 | $21.50 | $28.50 | $342.00 |
| $2,500 | $62.50 | $21.50 | $41.00 | $492.00 |
For beneficiaries subject to IRMAA surcharges, the net benefit shrinks further. A single retiree with MAGI above $106,000 in 2026 pays an additional $74.00 per month in Part B premiums.4 That retiree's total Part B premium becomes $280.50 per month, and the COLA increase may be entirely consumed by the premium increase alone.
The net purchasing power gap for 2026 is approximately 6.9 percentage points — the difference between the 9.68% Part B increase and the 2.5% COLA for beneficiaries not subject to IRMAA.5 This gap compounds over time, meaning retirees lose purchasing power year after year.
IRMAA Surcharges in 2026 — What Higher-Income Retirees Will Pay
The Income-Related Monthly Adjustment Amount (IRMAA) adds surcharges to Part B premiums for beneficiaries with modified adjusted gross income above certain thresholds. For 2026, IRMAA surcharges begin at $74.00 per month for single filers with MAGI above $106,000 and reach $289.20 per month for income above $500,000.4
The full IRMAA bracket structure for 2026 Part B premiums:
| Filing Status | MAGI Range | Total Monthly Part B Premium | Monthly Surcharge |
|---|---|---|---|
| Single | $106,000 or less | $206.50 | $0.00 |
| Single | $106,001 - $133,000 | $280.50 | $74.00 |
| Single | $133,001 - $167,000 | $354.50 | $148.00 |
| Single | $167,001 - $200,000 | $428.50 | $222.00 |
| Single | $200,001 - $500,000 | $495.70 | $289.20 |
| Single | Over $500,000 | $495.70 | $289.20 |
Married couples filing jointly face different thresholds. The first IRMAA bracket for joint filers begins at $212,000 MAGI, with the same surcharge amounts applying at higher income levels.4
A critical detail: IRMAA uses a two-year lookback. The 2026 premium is based on the 2024 tax return. A one-time capital gain, Roth conversion, or large required minimum distribution in 2024 can trigger IRMAA surcharges two years later. Beneficiaries can appeal using Form SSA-44 if they experienced a life-changing event such as retirement, divorce, or death of a spouse.
Age-Based Strategies for Timing Medicare Enrollment and Social Security Claims
The decision to claim Social Security at age 62, 65, or 70 interacts directly with Medicare Part B premium exposure. Full retirement age (FRA) remains 67 for those born in 1960 or later, with delayed retirement credits adding 8% per year up to age 70.6
Consider a hypothetical retiree, Sarah, who turns 62 in 2026. She has a $60,000 annual pension and $400,000 in a traditional IRA. If she claims Social Security at 62, her benefit is reduced permanently — for example, by roughly 30%.[^7] If she waits until 70, her benefit grows through delayed credits of 8% per year plus COLA adjustments.[^8]
The trade-off involves Part B premium exposure during the gap years. Sarah must enroll in Medicare at 65 regardless of when she claims Social Security. If she delays Social Security to 70, she pays Part B premiums out of pocket for five years without Social Security income to offset them. At the standard monthly premium, that's roughly $12,400 in premiums over five years1.
For higher-income retirees, the calculus shifts. Suppose a married couple, Michael and Jennifer, have combined MAGI of $180,000 from pensions and IRA distributions. They face IRMAA surcharges in the first bracket, paying roughly $280.50 each per month for Part B1. Their combined annual Part B cost is approximately $6,7321. If they delay Social Security to 70, they pay these premiums for five years — about $33,660 total1 — before receiving any Social Security benefits.
The breakeven analysis depends on life expectancy. A retiree in excellent health with family longevity may benefit from delaying to 70 despite premium costs. A retiree with health concerns or lower life expectancy may prefer claiming at 62 or 65.
Coordinating 401k Withdrawals to Manage IRMAA Income Brackets
Traditional IRA and 401k withdrawals count as MAGI for IRMAA purposes. A retiree who takes a large distribution for a home purchase, car, or vacation can inadvertently push into a higher IRMAA bracket for two years.
Consider a retiree who needs $50,000 for a new roof in 2024. If their baseline MAGI is $95,0001, the distribution pushes MAGI into the second IRMAA bracket for 20262, triggering a monthly surcharge of roughly $1483. That adds up to about $1,776 per year for two years — approximately $3,552 in extra premiums4.
Strategies to manage IRMAA exposure include spreading large withdrawals across multiple tax years to stay below thresholds, using Roth IRA conversions in low-income years before Medicare enrollment, drawing from taxable brokerage accounts instead of traditional IRAs when possible, and timing required minimum distributions to avoid bunching income in a single year.
Roth conversions deserve special attention. Converting a traditional IRA to a Roth triggers taxable income in the conversion year. A retiree who converts $100,000 in 2024 may face IRMAA surcharges in 20261. The benefit of tax-free Roth withdrawals later must be weighed against the two-year premium penalty.
Spousal Benefit Planning When One Spouse Faces Higher Part B Costs
Married couples face unique coordination challenges when one spouse has significantly higher Part B premium exposure. The higher-earning spouse's IRMAA surcharge applies independently — each spouse's Part B premium is based on their own IRMAA determination, but both use the couple's joint MAGI.
Suppose Michael has a $120,000 pension and Jennifer has $60,000 in IRA distributions. Their joint MAGI of $180,000 places them in the first IRMAA bracket for married couples filing jointly1. Michael pays $280.50 per month for Part B, and Jennifer pays $280.50 — total $6,732 annually2.
If Michael delays Social Security to 70 while Jennifer claims at 65, Jennifer's Social Security benefit covers her Part B premium but Michael's premium comes from savings. In this hypothetical scenario, the couple pays roughly $33,660 in combined Part B premiums during the five-year gap.
Spousal benefit strategies can help. The lower-earning spouse may claim a spousal benefit equal to 50% of the higher-earning spouse's full retirement age benefit.1 For example, if Michael's FRA benefit is $3,000 per month, Jennifer could receive $1,500 per month as a spousal benefit at her full retirement age, even if she has no work history.
The decision to file for spousal benefits while delaying the higher earner's own benefit requires careful MAGI management. Spousal benefits count as income and may push the couple into a higher IRMAA bracket.
Long-Term Care Costs and Their Impact on Medicare and Social Security Income
Medicare Part B does not cover long-term custodial care. Part B covers physician services, outpatient care, and preventive services at 80% after the annual $257 deductible in 2026.1 Skilled nursing facility care is covered only for 100 days following a qualifying hospital stay, with a daily coinsurance after day 20.
Long-term care costs create a double squeeze on retirement income. A retiree paying, for example, $6,000 per month for assisted living must cover that cost from Social Security, pensions, and savings. If Part B premiums consume a growing share of Social Security COLA increases, less income remains for care expenses.
Consider a retiree with $2,500 monthly Social Security and $1,000 monthly pension. After the $206.50 Part B premium1, net monthly income is $3,293.50. A $6,000 assisted living facility requires drawing $2,706.50 from savings each month. Over five years, that's $162,390 in savings depletion2.
Long-term care insurance can protect against this scenario. A policy purchased at age 60 may cost, for example, $2,500 to $3,500 annually and provide $150 to $200 per day in benefits. The premium is not deductible for most retirees, but benefits are generally tax-free.
Medicaid planning becomes relevant for retirees with significant long-term care needs. After spending down assets to state-specific limits, Medicaid may cover nursing home costs. However, Medicaid eligibility rules vary by state and require careful asset transfer planning well in advance of need.
Your Next Step
Calculate your 2026 net Social Security benefit by subtracting your projected Part B premium from your COLA increase. Use your 2024 tax return to estimate your 2026 IRMAA bracket, then run scenarios at age 62, 65, and 70 using the Social Security Administration's online calculator. If you anticipate a large withdrawal or Roth conversion, model the two-year IRMAA impact before proceeding. Smart Money After 60 provides a free net benefit calculator at smartmoneyafter60.com/cola-calculator.
Footnotes
-
https://www.medicare.gov/your-medicare-costs/medicare-part-b-costs ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11
-
https://www.cms.gov/newsroom/fact-sheets/2026-medicare-part-b-premiums ↩ ↩2 ↩3 ↩4 ↩5
-
https://www.cms.gov/medicare/payment/prospective-payment-systems/physician-and-other-practitioner/fee-schedule-compliance-audit-reviews-0 ↩ ↩2 ↩3 ↩4 ↩5
-
https://401kspecialistmag.com/2026-medicare-part-b-increase-to-eat-up-much-of-social-security-cola-raise ↩