October is an important month for Social Security because several figures affecting beneficiaries and workers are updated around this time. The 2027 cost-of-living adjustment, or COLA, will receive the most attention, but it is only one part of the picture.
A higher COLA can increase monthly Social Security benefits, but Medicare premiums and other deductions can reduce the amount beneficiaries actually receive. At the same time, workers collecting Social Security may see changes to the earnings-test limits, while higher earners will be watching the annual Social Security taxable maximum.
For 2026, Social Security benefits increased by 2.8%. Current 2027 estimates have generally been in the 3.5% to 3.6% range, although the final figure depends on inflation data and the formula established by law. The Social Security Administration explains that the annual COLA is based on changes in the Consumer Price Index for Urban Wage Earners and Clerical Workers, or CPI-W.
COLA
The 2027 COLA will be determined after the September inflation figures are available. The calculation compares the average CPI-W for July, August and September with the corresponding average from the previous year.
That means forecasts available before the September data are complete remain estimates. The official figure is expected to be announced in October.
A 3.5% COLA would represent a larger increase than the 2.8% adjustment applied in 2026. For example, a person receiving $2,000 per month would see an increase of approximately $70 if the final COLA were 3.5%.
| Monthly benefit | 3.5% increase | New monthly benefit |
|---|---|---|
| $1,500 | $52.50 | $1,552.50 |
| $2,000 | $70.00 | $2,070.00 |
| $2,500 | $87.50 | $2,587.50 |
| $3,000 | $105.00 | $3,105.00 |
The actual increase for an individual beneficiary will depend on their benefit amount and the final COLA percentage.
It is also important to distinguish between the gross Social Security benefit and the amount deposited into a bank account. A COLA applies to Social Security benefits, but other deductions can change the final payment.
Medicare
Medicare is one of the main reasons a higher Social Security COLA does not necessarily translate into the same percentage increase in a retiree’s disposable income.
The standard Medicare Part B premium for 2026 is $202.90 per month. The Medicare Trustees’ 2026 report estimated a 2027 standard Part B premium of $209.50, although the final amount is determined separately from the Social Security COLA.
Part B premiums are commonly deducted from Social Security benefits. As a result, a beneficiary could receive a higher Social Security payment while also having more deducted for Medicare.
The effect varies from person to person. Some beneficiaries may also pay income-related Medicare premiums depending on their income.
The official Medicare premium information provides current details on Part B premiums and other Medicare costs. Beneficiaries should use the final 2027 figures rather than early estimates when calculating their expected net payment.
Earnings
Social Security recipients who continue working should also watch the annual earnings-test limits.
People can generally work while receiving Social Security benefits. However, beneficiaries who are below full retirement age can have benefits withheld if their earnings exceed the applicable annual limit.
For 2026, someone who remains below full retirement age throughout the year can earn $24,480 before the earnings test applies. Social Security withholds $1 in benefits for every $2 earned above that threshold.
The rules change for the year in which a person reaches full retirement age. A different earnings limit applies, and the withholding formula becomes less restrictive.
These amounts are adjusted periodically under rules established by law. Therefore, the 2027 earnings-test limits are another set of figures worth checking when the new annual numbers are released.
The earnings test is sometimes misunderstood as a permanent loss of benefits. In general, benefits withheld because of the earnings test are taken into account when Social Security recalculates benefits at full retirement age.
The Social Security Administration’s earnings test guidance explains the rules and current limits.
Wage Cap
Another annual figure affects workers rather than directly changing the monthly benefit of most retirees. This is the Social Security taxable maximum, commonly called the wage cap.
In 2026, Social Security taxes apply to covered earnings up to $184,500. Employees generally pay a 6.2% Social Security tax on wages up to that amount, while employers pay a matching 6.2%.
For someone earning more than the taxable maximum, wages above the limit are not subject to the 6.2% Social Security tax. Medicare taxes operate under different rules and continue to apply beyond the Social Security wage cap.
The 2027 taxable maximum will be determined using the statutory wage-indexing process. If the national average wage increases, the taxable maximum can also increase.
For higher earners, that means the annual wage-cap announcement can affect how much Social Security tax is withheld from their paychecks.
Timing
Although October is associated with several Social Security updates, the figures are not all calculated in exactly the same way.
The COLA is tied to inflation data. The taxable maximum and earnings-test amounts are based on wage-related formulas. Medicare premiums are established separately through the Medicare program.
This distinction matters when trying to estimate the financial effect of the 2027 changes.
For example, a 3.5% Social Security COLA does not mean every beneficiary’s bank deposit will rise by exactly 3.5%. Medicare premiums, tax withholding and other deductions can affect the final amount.
The same applies to workers. A higher earnings-test limit could provide more room for someone to earn wages before the test affects benefits, while a higher taxable maximum could result in additional Social Security payroll taxes for workers with higher earnings.
Planning
For retirees, the most useful approach is to consider the COLA alongside expected Medicare costs rather than looking at the adjustment in isolation.
Suppose someone receives $2,000 per month in Social Security and the final COLA is 3.5%. Their gross benefit would increase by approximately $70 per month. If their Medicare deduction also increases, however, the increase in their actual deposit would be smaller.
That does not make the COLA meaningless. It simply means the headline percentage is only one part of the household budget.
Workers receiving Social Security should similarly check the new earnings-test limits before making decisions about how much they work. Higher earners should also monitor the new taxable maximum because it can affect payroll deductions.
The final 2027 numbers will provide a clearer picture once the relevant government agencies publish them. Until then, forecasts are useful for planning but should not be treated as final figures.
The key point for retirees is that the 2027 Social Security COLA should be viewed alongside Medicare premiums and other deductions. A larger COLA could increase gross benefits, but the amount beneficiaries actually keep will depend on several factors. October’s announcements will therefore provide more than one number to watch as households prepare for 2027.
