Here's How Much a $2,400 Social Security Check Will Become in 2027

If your Social Security check lands at $2,400 a month right now, you've probably already heard that a raise is on the way for 2027. The Social Security Administration (SSA) has confirmed the size of that increase, and it applies to tens of millions of retirees, survivors, and people with disabilities.

But the announcement itself can be confusing. The percentage you hear in the news isn't the same as the number that shows up in your bank account, and the gap between those two figures trips up a lot of people every year. Here's how to do the math and prepare yourself financially, and why the amount you actually see deposited could look a little different.

The 2027 COLA is 3.6%

The SSA announced a 3.6% cost-of-living adjustment (COLA) for 2027, according to the agency's 2027 COLA fact sheet. The COLA is a yearly adjustment designed to help Social Security and Supplemental Security Income (SSI) payments keep pace with inflation. It's based on the change in the Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) from the third quarter of 2025 through the third quarter of 2026, as measured by the Bureau of Labor Statistics.

For context, the 2027 COLA is larger than the 2.8% adjustment that took effect in 2026, and it comes after a run of more modest increases in recent years, according to SSA's COLA history.

What a $2,400 benefit becomes in 2027

Here's the straightforward math, using your gross benefit before any deductions.

Start with your current $2,400 monthly benefit and multiply it by 3.6%, which equals $86.40. Add that to your starting benefit, and your new gross monthly amount comes to $2,486.40.

Over a full year, that $86.40 monthly bump adds up to roughly $1,036.80 in additional gross benefits.

It's worth noting that the SSA rounds COLA-related dollar fee limits and similar figures to the nearest whole dollar in its official tables and notices, so your actual notice may show $2,486 rather than $2,486.40. The math above is meant to show how the percentage translates into dollars, not to replace the exact figure the SSA calculates for your individual record.

Why this is your gross benefit, not your deposit

The $2,486.40 figure represents your benefit before Medicare premiums, tax withholding, or other deductions come out. For many retirees, the actual deposit is smaller than the gross benefit because of items like these:

Medicare Part B premiums

Many beneficiaries have their Part B premium deducted automatically from their Social Security payment. The standard Part B premium is $202.90 per month in 2026, according to the Centers for Medicare & Medicaid Services (CMS). CMS has not yet announced the 2027 premium at the time of this writing; that figure is typically released in November and would apply to deductions starting in January 2027.

Income-related monthly adjustments (IRMAA)

Higher earners may pay more than the standard Medicare Part B premium, which further reduces the net deposit.

Voluntary tax withholding

Some beneficiaries choose to have federal income tax withheld directly from their benefit.

Garnishments or overpayment recovery

In some cases, the SSA may withhold part of a payment to recover a prior overpayment or satisfy a legal obligation.

Because of these deductions, two people with the same gross $2,400 benefit could see very different amounts land in their accounts after the 2027 COLA is applied. That's normal, and it doesn't mean the COLA was calculated incorrectly.

When the increase actually begins

The 3.6% COLA takes effect with benefits payable in January 2027 for most Social Security beneficiaries, according to the SSA. SSI recipients, who are typically paid on the first of the month, will see their increased payment arrive on December 31, 2026, because January 1 falls on a holiday.

It's also useful to understand that Social Security benefits are paid a month behind. The January 2027 payment, which reflects the new COLA, is technically the benefit for December 2026.

How the average benefit compares

A $2,400 benefit is above the current nationwide average. The SSA's 2027 fact sheet estimates the average monthly benefit for all retired workers at $2,170 after the 3.6% COLA is applied, up from an estimated $2,095 before the adjustment. Other estimated 2027 averages include $3,355 for an aged couple both receiving benefits and $1,701 for all disabled workers, according to the same SSA fact sheet.

The maximum possible benefit also depends heavily on when someone claims. For a worker retiring at full retirement age (67 for anyone born in 1960 or later) in 2027, the maximum benefit is $4,188 per month, according to SSA's 2027 COLA fact sheet. 

That's lower than the maximum available to workers who delay claiming until age 70, which reflects delayed retirement credits earned between full retirement age and 70; for 2026, SSA puts that age-70 maximum at $5,181 per month, with the 2027 age-70 figure not yet published.

Other 2027 changes tied to the COLA

A few related figures are shifting alongside the COLA, according to the SSA's 2027 fact sheet:

Taxable maximum

The maximum amount of earnings subject to Social Security tax (the taxable maximum) rises to $192,300, up from $184,500 in 2026.

Earnings-test limit, under full retirement age

The earnings-test limit for workers younger than full retirement age increases to $25,560 per year ($2,130 per month).

Earnings-test limit, year reaching full retirement age

The earnings-test limit for those reaching full retirement age in 2027 increases to $67,920 per year ($5,660 per month).

SSI federal payment standard

The SSI federal payment standard increases to $1,029 per month for an individual and $1,544 per month for a couple.

Where to find your exact amount

The math above shows how the 3.6% COLA generally works, but your personalized amount is calculated individually by the SSA. The agency typically mails COLA notices in December, and beneficiaries who've created a personal my Social Security account and opted into paperless notices by November 18, 2026, may be able to view their notice online starting in late November, according to SSA. That notice spells out your exact new gross benefit, any deductions, and your net payment amount for 2027.

Those who want to see their specific number as soon as it's available can set up or check a my Social Security account rather than relying on a general estimate. For questions about an individual notice, the SSA can be reached at 1-800-772-1213.

Bottom line

A 3.6% COLA turns a $2,400 gross monthly Social Security benefit into about $2,486.40 before rounding, an increase of roughly $86.40 a month or about $1,036.80 a year. That's a meaningful bump to your senior benefit, but it's a gross figure, and the actual deposit may be smaller once Medicare premiums or other deductions are factored in.

The most reliable way to confirm a real 2027 payment is to check the official COLA notice once the SSA issues it, either by mail in December or earlier online through a Social Security account. That notice, not a general percentage calculation, is the final word on what a beneficiary will actually receive.

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