Social Security is an important source of retirement income for millions of Americans, making the annual cost-of-living adjustment, or COLA, closely watched. The 2027 increase is not final yet, but current estimates suggest benefits could rise by 3.4% to 3.6%.
That potential increase is especially relevant because Medicare Part B premiums are also expected to rise in 2027. If current projections hold, the Social Security increase could be slightly larger than the increase in the standard Part B premium. For some retirees, that could mean keeping more of their monthly benefit after Medicare costs are deducted.
COLA
The Social Security COLA is an annual adjustment intended to help benefits keep pace with inflation. When the prices of everyday goods and services increase, the COLA raises monthly Social Security payments to help protect beneficiaries’ purchasing power.
The adjustment is based on inflation data and is normally announced by the Social Security Administration in October. Until the relevant inflation figures are available, any estimate for 2027 remains subject to change.
For retirees who rely heavily on Social Security, even a relatively small percentage change can affect their monthly household budget.
Estimates
Current projections put the 2027 Social Security COLA between 3.4% and 3.6%.
The Senior Citizens League has estimated a 3.6% increase, while Social Security and Medicare policy analyst Mary Johnson has projected a 3.4% adjustment. The midpoint of those estimates is about 3.5%.
That would represent another increase following the 2.8% COLA in 2026. However, beneficiaries should not treat the current projections as the final figure. The official adjustment will depend on the inflation data used in the government’s calculation.
If inflation moves differently than expected during the remaining months of the calculation period, the final COLA could be higher or lower than today’s estimates.
Inflation
Inflation is the central factor behind the Social Security COLA. The government uses a specific measure of consumer prices to determine how much benefits should increase.
Energy prices can also influence the broader inflation picture. Changes in fuel costs can affect transportation and business expenses, which can eventually influence the prices consumers pay for goods and services.
Tariffs and other trade policies can have an effect as well. Higher import costs may be passed along to consumers, although the impact depends on the products involved, business decisions and broader economic conditions.
These factors help explain why the 2027 COLA remains a moving target until the official calculation is complete.
Medicare
The COLA is only one part of the equation for Social Security recipients who also have Medicare.
The standard Medicare Part B premium is generally deducted directly from a beneficiary’s Social Security payment when the beneficiary has the premium withheld. Part B covers outpatient medical services and other healthcare expenses.
The standard Part B premium is $202.90 per month in 2026. The 2026 Medicare Trustees Report projects a 3.25% increase for 2027, which would bring the premium to roughly $209.50.
That projected increase is important because Medicare costs can reduce the amount of a Social Security COLA that actually remains available to a retiree.
Difference
Recent years illustrate why retirees need to consider both numbers.
Social Security benefits increased by 3.2% in 2024, while the standard Part B premium rose by 5.9%. In 2025, Social Security increased by 2.5%, compared with a 5.9% increase in the Part B premium.
The difference was even more noticeable in 2026. Social Security benefits rose 2.8%, while the standard Part B premium increased 9.7%.
When Medicare premiums increase faster than Social Security benefits, part of the COLA can effectively be absorbed by higher healthcare costs.
The projected 2027 figures would be different. A Social Security increase of 3.4% to 3.6% would be slightly above the projected 3.25% increase in the standard Part B premium.
Purchasing
A higher COLA can help retirees manage rising expenses, but it does not necessarily restore all of the purchasing power lost to inflation over time.
The Senior Citizens League estimated in a 2024 report that Social Security had lost about 20% of its purchasing power between 2010 and 2024. One issue frequently discussed is whether the inflation measure used for the COLA accurately reflects the spending patterns of older Americans.
Social Security’s adjustment is based on the Consumer Price Index for Urban Wage Earners and Clerical Workers, known as CPI-W. Critics of the current approach argue that retirees may have different spending patterns, particularly because healthcare can account for a significant portion of an older household’s budget.
As a result, a COLA that appears reasonable based on the official inflation measure may not fully match the expenses experienced by every retiree.
Planning
Retirees should consider the 2027 COLA estimates as part of broader retirement planning rather than as a guaranteed increase.
For example, a person receiving $1,800 per month in Social Security would see an increase of about $63 if the COLA were 3.5%. That calculation is before considering Medicare premiums, taxes or other deductions.
The actual dollar increase will vary depending on each person’s current benefit. A higher monthly benefit also does not necessarily translate into the same increase in disposable income if other household expenses are rising.
Social Security claiming decisions can have a much larger long-term effect. The age at which someone claims benefits, their earnings record and their individual household circumstances can all influence lifetime Social Security income.
Outlook
The 2027 Social Security COLA could be between 3.4% and 3.6%, based on current estimates. At the same time, the standard Medicare Part B premium is projected to increase by about 3.25%.
If both projections prove accurate, Social Security benefits would rise slightly faster than the standard Part B premium. That could leave some Medicare beneficiaries with a somewhat larger portion of their COLA after the premium is deducted.
The final outcome, however, will depend on inflation data and the official calculation later this year. For retirees, the most useful comparison is not simply the size of the COLA, but how the benefit increase compares with Medicare premiums and the cost of everyday necessities.
The 2027 adjustment could provide some additional income, but its practical value will depend on what happens to prices and healthcare costs at the same time.
FAQs
What could the 2027 Social Security COLA be?
Current estimates put the 2027 COLA at 3.4% to 3.6%.
When will the 2027 COLA be announced?
The official 2027 COLA is expected to be announced in October.
Could Medicare Part B premiums rise in 2027?
Yes. The standard Part B premium is projected to rise about 3.25%.
What is the 2026 Part B premium?
The standard Medicare Part B premium is $202.90 per month in 2026.
Why does the COLA matter to retirees?
A higher COLA can help retirees keep pace with rising living costs.
