• As a 2.5% cost-of-living adjustment goes into effect in 2025, millions of beneficiaries will see bigger monthly checks.
• High earners who consistently have maximum earnings over the course of their careers typically get the highest benefits.
• But even beneficiaries with moderate earnings can benefit by waiting to claim until age 70, experts say.

Millions of Social Security beneficiaries will benefit from the 2.5% cost-of-living adjustment for 2025, set to take effect in January.

With that increase, the maximum Social Security benefit for a worker retiring at full retirement age will jump to $4,018 per month, up from $3,822 per month this year, according to the Social Security Administration.

But while those maximum benefits will see a $196 monthly increase, retirement benefits will go up by about $50 per month on average, according to the agency.

The average monthly benefit for retired workers is expected to increase to $1,976 per month in 2025, a $49 increase from $1,927 per month as of this year, according to the Social Security Administration.

Who gets maximum Social Security benefits?

The highest Social Security benefits generally go to people who have had maximum earnings their entire working career, according to Paul Van de Water, a senior fellow at the Center on Budget and Policy Priorities.

That cohort generally includes a "very small number of people," he said.

Because Social Security retirement benefits are calculated based on the highest 35 years of earnings, workers need to consistently have wages up to that threshold to earn the maximum retirement benefit.

"Very few people start out at age 21 earning the maximum level," Van de Water said.

Workers contribute payroll taxes to Social Security up to what is known as a taxable maximum.

In 2024, a 6.2% tax paid by both workers and employers (or 12.4% for self-employed workers) applies to up to $168,600 in earnings. In 2025, that will go up to $176,100.

Notably, that limit applies only to wages that are subject to federal payroll taxes. If a wealthy person has other sources of income, for example from investments that do not require payroll tax contributions, that will not affect the size of their Social Security benefits, said Jim Blair, vice president of Premier Social Security Consulting and a former Social Security administrator.

How can you increase your Social Security benefits?

There are beneficiaries who are receiving Social Security checks amounting to more than $4,000 per month, and they usually have waited to claim until age 70, according to Blair.

"Technically, waiting until 70 gets you the most amount of Social Security benefits," Blair said.

By claiming retirement benefits at the earliest possible age — 62 — beneficiaries receive permanently reduced benefits.

At full retirement age — either 66 or 67, depending on date of birth — retirees receive 100% of the benefits they've earned.

And by waiting from full retirement age up to age 70, beneficiaries stand to receive an 8% benefit boost per year.

By waiting from age 62 to 70, beneficiaries may see a 77% increase in benefits.

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However, because everyone's circumstances are different, it may not always make sense to wait until the highest possible claiming age, Blair said.

Prospective beneficiaries need to evaluate not only how their claiming decision will impact them individually, but also their spouse and any dependents, he said.

"You have to look at your own situation before you apply," Blair said.

Also, it is important for prospective beneficiaries to create an online My Social Security account to review their benefit statements, he said. That will show estimates of future benefits and the earnings history the agency has on record.

Because that earnings information is used to calculate benefits, individuals should double check that information to make sure it is correct, Blair said. If it is not, they should contact the Social Security Administration to fix it.