Why Some Social Security Checks Won’t Grow Even With a Projected 3.6% Raise in 2027
8 min read · Last updated September 8, 2026
- The 2026 Medicare Part B premium is $202.90 a month, up $17.90 from $185.00, while the 2026 Social Security Cost-of-Living Adjustment (COLA) is 2.8%.
- Hold harmless caps a Part B premium increase at the dollar amount of a beneficiary’s COLA raise, so a Social Security net check cannot shrink year over year.
- It excludes new Medicare enrollees, anyone paying an Income-Related Monthly Adjustment Amount (IRMAA) surcharge, and anyone whose Part B premium isn’t deducted from a Social Security check, and it never covers Part D premiums.
- The Senior Citizens League projects the 2027 COLA at 3.6% as of August 2026; the Social Security Administration (SSA) finalizes the real number on October 14, 2026.
In this article
- The mechanic behind hold harmless
- The math: comparing your COLA increase to your premium increase
- Who hold harmless does not protect
- What the projected 2027 COLA means for your premium
- What seniors get wrong about hold harmless
Carol Whitfield, 68, retired from a dental hygiene practice in Scottsdale, Arizona, in 2023. A pension and Individual Retirement Account (IRA) withdrawals push her income over $109,000 a year, so she has paid an income-related Medicare surcharge since her first year on the program. In January 2026, her Social Security deposit rose by the standard 2.8% COLA, but her Medicare Part B premium jumped to $284.10 a month, the first income-related tier above the $202.90 standard rate. She’d read that a rule called hold harmless stops Medicare premiums from swallowing a Social Security raise, and assumed it applied to her. It doesn’t. Beneficiaries who pay an IRMAA surcharge are excluded from hold harmless by name.
The mechanic behind hold harmless
The hold harmless provision comes from Section 1839(f) of the Social Security Act, the same law that sets Medicare Part B premiums each year. The rule is narrow and mechanical. If a beneficiary’s Part B premium is deducted directly from a Social Security check, the premium cannot rise by more dollars than the beneficiary’s Social Security COLA raised that check for the year.
If the standard premium increase would eat into more dollars than the COLA added, the government reduces that individual’s premium increase, not the COLA itself, until the two dollar figures match. The result is a net check that stays flat or grows for beneficiaries who qualify, never one that falls. The Federal Register’s 2026 Part B premium rule spells out the mechanic in the government’s own language.
The math: comparing your COLA increase to your premium increase
Whether hold harmless caps your premium comes down to one comparison: the dollar amount your Social Security check rose under the COLA, against the dollar amount the standard Part B premium rose. In 2026, the standard Part B premium climbed $17.90, from $185.00 to $202.90, according to a 2026 premium bulletin from the Centers for Medicare & Medicaid Services (CMS). The 2026 COLA was 2.8%.
Diane Ruiz, 79, a retired seamstress in Corpus Christi, Texas, receives a reduced Social Security retirement benefit of $500 a month because she claimed early with gaps in her earnings record. In 2025 she paid the standard $185.00 Part B premium, netting $315.00 a month after the deduction.
Her 2.8% COLA raised her gross benefit by $14.00, to $514.00, for 2026. That is less than the $17.90 the standard premium rose. Hold harmless capped her premium increase at her own $14.00 COLA amount instead, so she paid $199.00 for Part B rather than the full $202.90. Her net deposit: $514.00 minus $199.00 equals $315.00, the same number she banked in 2025.
The arithmetic behind that threshold matters more broadly than her case alone. Dividing the $17.90 premium increase by the 2.8% COLA rate puts the breakeven point at roughly $639 in monthly benefits. Anyone drawing less than that in 2025 needed hold harmless in 2026. Anyone drawing more had a COLA large enough to absorb the premium increase without triggering any cap at all.
Who hold harmless does not protect
Three groups fall outside the rule entirely, plus one Medicare part it never touches at all.
| Beneficiary situation | Protected by hold harmless in 2026? | Why |
|---|---|---|
| Claimed Social Security before 2025, has Part B deducted from the check, no IRMAA surcharge | Yes | Net check cannot fall below the prior year’s amount |
| First-year Medicare enrollees | No | There is no prior-year net check to hold harmless against |
| Beneficiaries paying an IRMAA surcharge | No | Excluded by name under Section 1839(f) of the Social Security Act |
| Anyone whose Part B premium isn’t deducted from a Social Security check, including those billed directly or not yet claiming Social Security | No | The provision only applies to premiums taken out of a Social Security benefit |
| Part D prescription drug premiums, for any beneficiary | No, never | Hold harmless covers Part B only |
Carol Whitfield from the opening of this article falls into the third row. Her $284.10 premium includes an $81.20 surcharge on top of the $202.90 standard rate, and none of that surcharge is capped by hold harmless, regardless of how small her COLA raise was that year. Beneficiaries who believe their IRMAA determination no longer reflects their real income can appeal it directly with the SSA.
What the projected 2027 COLA means for your premium
The Senior Citizens League, a nonprofit that tracks Social Security purchasing power, projected the 2027 COLA at 3.6% in its August 2026 update. The figure is based on Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) data through July. That is a downward revision from the 3.8% the group projected a month earlier, as inflation cooled. The SSA finalizes the real number on October 14, 2026, using July, August, and September CPI-W data together, so the 3.6% figure is a projection, not the final word.
CMS has not yet announced the 2027 Part B premium. That announcement typically arrives in mid-November, after the COLA is locked in. Once both numbers are public, the same math from the section above applies. Divide the dollar increase in the Part B premium by the COLA rate to find the benefit level below which hold harmless kicks in. If the 2027 COLA lands near 3.6%, a beneficiary collecting the 2026 average retirement benefit of roughly $2,071 a month would see a raise of about $74.56, comfortably more than recent Part B premium increases. The provision will matter most in 2027 for the same group it always protects, beneficiaries with the smallest checks. For a fuller walk-through of how the COLA itself gets calculated, see this breakdown of the 2026 COLA formula.
What seniors get wrong about hold harmless
The most common misunderstanding is treating hold harmless as a freeze on the Medicare premium itself. It isn’t. The provision caps how much the premium can increase in a single year relative to that year’s COLA. It does not erase the difference. When a beneficiary’s premium increase gets capped, as Diane Ruiz’s was in 2026, she is still paying less than the standard rate. Future COLAs can close that gap over time, pushing the effective premium back toward the standard amount, even in a year when Medicare announces no new increase at all.
The second misunderstanding is broader: treating hold harmless as a general Medicare protection instead of a narrow rule that applies to Part B premiums deducted from Social Security checks, and nothing else. New enrollees, IRMAA payers, Part D premiums, and anyone not yet drawing Social Security sit outside it entirely, and those are precisely the situations where beneficiaries are most likely to assume they’re covered.
Frequently asked questions
Does hold harmless mean my Medicare Part B premium can never increase? No. It caps how much the premium can rise in dollar terms relative to your Social Security COLA that year. Your premium can still increase up to that capped amount, and once your COLA outpaces future increases, the cap disappears and you pay the full standard rate.
I pay IRMAA. Does hold harmless protect me? No. Beneficiaries who pay an Income-Related Monthly Adjustment Amount (IRMAA) surcharge are excluded from hold harmless by name under federal law, regardless of how small their Social Security raise is. The surcharge portion of your premium is never capped by this rule.
I just enrolled in Medicare this year. Am I protected? No. Hold harmless compares your premium increase to your prior year’s net Social Security check. First-year enrollees have no prior-year Part B deduction to measure against, so the provision has nothing to hold harmless. You pay the standard 2026 premium of $202.90 outright, unless an IRMAA surcharge applies.
Does hold harmless cover my Part D prescription drug premium? No, never. The provision applies exclusively to Medicare Part B premiums. Part D premiums, set separately by each drug plan, can rise by any amount and are deducted from a Social Security check with no hold harmless protection at all.
What if I’m on Medicare but haven’t started Social Security yet? Hold harmless only protects premiums deducted from an active Social Security benefit. If you’re billed directly for Part B because you haven’t claimed Social Security, there’s no prior check for the provision to measure against, so you pay the full premium increase.
