WASHINGTON, April 28, 2026 —
Key Takeaways
- The Senior Citizens League projects a 2.8% COLA for 2027 — meaning the average retiree would receive a gross increase of approximately $57 a month, based on current average benefit levels of approximately $2,071.
- The Medicare Trustees Report projects Part B premiums will rise by an average of 6.4% per year over the next five years — which, applied to 2026’s $202.90 standard premium, implies a 2027 premium of approximately $215.90, an increase of $13 per month.
- After Medicare deductions, the average retiree’s net effective 2027 COLA would be approximately $44 — meaning Medicare will once again take back roughly 23% of the gross raise before a single dollar reaches the beneficiary’s bank account.
The COLA Math That Nobody Explains to Retirees
Every October, the Social Security Administration announces the following year’s cost-of-living adjustment with a headline percentage. Every November, the Centers for Medicare and Medicaid Services announces the following year’s Medicare Part B premium. The two announcements are made by different agencies, weeks apart, and rarely reported alongside each other in the same sentence.
The result is that tens of millions of Americans hear the COLA announced in October, mentally calculate their raise, and then discover in December — when their official notice arrives — that the number is materially smaller than they expected. The gap between the headline COLA and the net effective raise is almost entirely explained by the Medicare Part B premium increase, which is automatically deducted from Social Security checks for the roughly 68 million Americans enrolled in both programs.
In 2026, the pattern was stark. The headline COLA was 2.8% — a gross average raise of approximately $56 a month. The Part B premium rose 9.7%, from $185 to $202.90 — an increase of $17.90 a month. For the average beneficiary, Medicare took back nearly a third of the gross raise before it ever arrived. The net effective increase was approximately $38 a month — not $56.
The 2027 projections suggest the same pattern will repeat, in a slightly less severe form.
The 2027 Numbers — What to Expect
| Metric | 2025 | 2026 (Actual) | 2027 (Projected) |
|---|---|---|---|
| Social Security COLA | 2.5% | 2.8% | 2.8% (projected) |
| Average gross monthly raise | ~$49 | ~$56 | ~$57 |
| Medicare Part B premium | $185.00 | $202.90 | ~$215.90 (projected) |
| Monthly premium increase | $10.30 | $17.90 | ~$13.00 (projected) |
| Net effective monthly raise | ~$39 | ~$38 | ~$44 (projected) |
| Medicare share of COLA taken back | ~21% | ~32% | ~23% |
The 2027 projections carry genuine uncertainty — the COLA will not be officially announced until October 2026, and Medicare premiums will not be confirmed until November 2026. Both numbers are driven by inflation data and healthcare cost trends that are still unfolding. But the directional picture is clear: retirees should plan for a gross raise of approximately $57 and a net effective raise of approximately $44, with Medicare absorbing the rest.
For a couple where both spouses receive Social Security and are enrolled in Medicare, the combined gross raise could approach $114 a month — and the combined net effective raise, after both Medicare deductions, would be closer to $88.
Why Medicare Keeps Outpacing Social Security
The COLA is calculated using the Consumer Price Index for Urban Wage Earners and Clerical Workers — a measure of general consumer inflation. Medicare premiums are driven by healthcare cost inflation, which has historically run significantly faster than general inflation. Over the past ten years, general CPI has averaged approximately 3.2% annually. Healthcare costs have averaged closer to 5% to 6% annually, with significant year-to-year variation driven by new drug approvals, hospital utilization patterns, and changes in how Medicare reimburses physicians.
The structural result is that healthcare cost inflation will, in most years, outpace the CPI-based COLA — meaning the Medicare deduction grows faster than the Social Security raise. This gap has been widening over time. In 2023, dual enrollees caught a rare break when the Part B premium actually declined slightly. That was the exception, not the rule.
The Medicare Trustees Report’s projection of 6.4% annual premium growth over the next five years implies that by 2031, the standard Part B premium will be approaching $280 a month — roughly $77 a month more than today. If COLA growth averages 2.8% over the same period, gross benefits will have grown by approximately $310 a month by 2031. Medicare will have consumed more than 25% of that growth.
The IRMAA Layer That Makes It Worse for Some Retirees
For approximately 8% of Medicare beneficiaries — those whose modified adjusted gross income exceeded $106,000 as a single filer or $212,000 as a married couple in the tax year used to set their premium — the standard $202.90 Part B premium does not apply. They pay Income-Related Monthly Adjustment Amount surcharges that can push their monthly premium to anywhere from $284 to $628.
The IRMAA surcharge is calculated using tax returns from two years prior. That means a retiree who had a one-time high-income year — from a home sale, a large IRA withdrawal, a business distribution, or an inheritance — can find themselves paying IRMAA surcharges for an entire year even if their current income is minimal. The effective COLA for an IRMAA-affected beneficiary paying $400 a month in Part B premiums is negative in most years — their Medicare costs are rising faster than their Social Security raise regardless of the headline percentage.
The appeal process exists — formally called a Life Changing Event request — and allows beneficiaries who experienced a qualifying income reduction after the tax year used to set their premium to request a new income determination. Qualifying events include retirement, reduction in work hours, divorce, death of a spouse, and loss of income-producing property. The SSA does not proactively notify beneficiaries that this appeal exists, and most IRMAA surcharges are paid unnecessarily for an entire year simply because the affected retiree never knew to ask.
The Social Security Claiming Age That Changes This Calculation
One underappreciated dimension of the COLA-versus-Medicare dynamic is that it rewards delayed claiming more than most calculators show. Each year a beneficiary delays claiming Social Security past age 62 adds approximately 5% to 8% to their permanent monthly benefit — a larger base to which every future COLA applies.
But delayed claiming also means a larger base on which the Medicare deduction lands. A beneficiary claiming at 70 with a $3,400 monthly benefit and a 2.8% COLA receives a gross raise of $95 a month. After the Medicare Part B deduction increase, their net raise is approximately $82. A beneficiary who claimed at 62 with a reduced $1,400 monthly benefit receives a gross raise of $39 — and after the same Medicare deduction increase, nets approximately $26.
The percentage impact of Medicare on the COLA is similar for both. The dollar impact is where delayed claiming continues to pay dividends that no annual Medicare cost increase can fully neutralize.
Pro Tips a Generic Article Would Miss
1. Track the Medicare Part B premium announcement in November — not the COLA in October — as the more important number for your actual take-home income. The October COLA announcement generates all the headlines. The November Medicare premium announcement is the one that determines what you actually receive. In years when healthcare inflation is running hot, the November number can turn a respectable October raise into a marginal one. Planning your 2027 budget requires both figures, and you need to track them in sequence.
2. If you are still working and delaying Social Security, use a Roth conversion strategy during your pre-Medicare years to lower your IRMAA exposure at 65. IRMAA is calculated using income from two years prior. If you retire at 63 and convert a portion of your traditional IRA to a Roth IRA during ages 63 and 64, you can manage your income in the years that will determine your Medicare premium at 65 and 66. This is one of the highest-leverage retirement income planning moves available to pre-Medicare households and is frequently overlooked by financial advisors who focus on investment returns rather than tax-advantaged savings strategies.
3. The $6,000 senior tax deduction introduced in 2026 can help offset Medicare premium increases — but only if you file correctly. The new deduction for filers aged 65 and older — available to singles with MAGI under $75,000 and married couples under $150,000 — reduces taxable income directly. For a retiree in the 22% bracket absorbing a $13 monthly Medicare premium increase, the $6,000 deduction saves approximately $1,320 in federal taxes annually — more than enough to offset the higher premium. The deduction is not automatic on tax software platforms that have not yet fully integrated it. Verify with your tax preparer that it is being applied.
The most important action any retiree or near-retiree can take before year-end is to run a two-year forward projection — not of Social Security benefits in isolation, but of the net effective monthly income after Medicare deductions. The headline COLA announced in October will overstate what you will actually receive. The Medicare premium announced in November will tell you by how much. Knowing the gap in advance — rather than discovering it when the January check arrives — is the difference between a budget that holds and one that doesn’t.
Frequently Asked Questions
Q: What is the projected Social Security COLA for 2027? A: The Senior Citizens League projects a 2.8% COLA for 2027 — identical to 2026. The official announcement will come in October 2026 based on third-quarter CPI-W inflation data.
Q: How much will Medicare Part B cost in 2027? A: The 2027 premium has not been officially announced. Using the Medicare Trustees Report’s projected average annual increase of 6.4%, the standard Part B premium would rise from $202.90 to approximately $215.90 — an increase of roughly $13 per month.
Q: How much will my Social Security check actually increase in 2027 after Medicare? A: Based on current projections, the average retiree enrolled in both Social Security and Medicare would receive a gross increase of approximately $57 a month from a 2.8% COLA — and a net effective increase of approximately $44 after the projected Medicare Part B premium increase.
Q: What is the IRMAA appeal process for Medicare premiums? A: If you received an IRMAA surcharge based on a high-income year that no longer reflects your current income — due to retirement, divorce, death of a spouse, or reduced work hours — you can file a Life Changing Event request with the Social Security Administration to have your premium recalculated using your current income. This appeal is not automatic and must be initiated by the beneficiary.
Q: Why does Medicare keep taking back more of the Social Security COLA each year? A: The COLA is based on general consumer inflation measured by the CPI-W. Medicare premiums are driven by healthcare cost inflation, which has historically grown faster than general inflation. When healthcare costs outpace CPI, Medicare premiums rise faster than COLA — reducing the net effective raise for dual enrollees.
