What Is OASDI?

The Social Security Act of 1935 and later amendments created the Old-Age, Survivors, and Disability Insurance program. Most people know this federal benefits program as OASDI or Social Security.

The OASDI program receives income from payroll taxes. The majority of payouts go to monthly benefits. The rest goes to other costs, including lump-sum death payments. The Social Security Administration (SSA) oversees this system.

There’s a lot to learn about Social Security. You might wonder how much of your paycheck goes toward this program and whether it will benefit you in the future. This article explains the OASDI program, including payroll tax rates and Social Security credits.

Understanding the Social Security programs can help you make informed decisions about retirement planning. You can learn about what benefits you or your family members may be eligible to receive. For personalized advice about applying for benefits, you can speak with a Social Security benefits lawyer.

How OASDI Taxes Affect Your Paycheck

You may have noticed a line item on your paystub for an “OASDI tax” or “FICA tax.” This amount is withheld from employees’ paychecks for Social Security taxes.

The OASDI tax is mandatory for employees, employers, and the self-employed. Internal Revenue Service (IRS) statute determines OASI tax rates. This federal tax revenue is transferred to the U.S. Treasury for eventual disbursements.

OASDI Tax Rate for Employees and Employers

An employee contributes to OASDI through payroll taxes under the Federal Insurance Contribution Act (FICA). An employee pays a mandatory FICA Social Security tax of 6.2% and a Medicare tax of 1.45% for a total of 7.65%. The employer’s share matches the employee’s contribution.

OASDI Tax Rate for Self-Employed Individuals

People who work for themselves contribute through self-employment taxes under the Self-Employment Contributions Act (SECA). The SECA tax rate is 15.3% in 2026.

Self-employed workers pay a rate twice as high as regular employees because they must pay the total tax for both employees and employers under SECA. Self-employed people receive a tax deduction in exchange for the higher federal income tax rate.

The Wage Base Cap on Taxable Income

The federal government places a ceiling on earnings subject to OASDI taxation. The OASDI ceiling in 2026 is $184,500. The tax will apply to earnings up to that maximum amount. Additional earnings above this amount are not taxable for OASDI.

The taxable maximum amount fluctuates. The SSA uses the national average wage index to calculate the cap. If workers’ wages increase on average, the taxable maximum amount rises as well.

Who Is Exempt from Social Security Taxes?

Members of certain groups receive an exemption from paying Social Security taxes. This includes members of religious groups, including the Amish and Mennonites. These individuals must apply for an exemption through the SSA.

Nonresident immigrants are generally liable for OASDI and Medicare taxes. Yet, a few exceptions exist for workers with certain types of visas and employment. These visas mainly cover students, scholars, and foreign government employees.

OASDI Cost-of-Living Adjustments

As daily expenses rise due to inflation, the SSA may need to raise its payments to Social Security beneficiaries. Once per year, the law requires the SSA to recalculate OASDI benefits.

The SSA uses the annual consumer price index to decide this change. If the index shows higher prices that year, the SSA will issue a cost-of-living adjustment (COLA). Without an increase, there is no COLA.

If you are a recipient of OASDI, the COLA can affect the amount of your monthly benefits. For example, if the SSA issues a 3% COLA, a $2,000 monthly benefit would become $2,060 instead. The actual COLA percentage varies each year.

The COLA does not directly impact OASDI taxes. Social Security law sets the tax rate. The SSA also adjusts the taxable income limit separately from the COLA each year.

How To Earn Social Security Credits

When you work and pay into the system, you earn up to four quarters of coverage, or credits, per year. Credits are based on an employee’s wages or self-employment income during the year. Employers report their employees’ earnings once a calendar year.

You may work year-round to earn four credits or enough for all four credits in a shorter time. In 2026, a worker must earn $1,890 to receive one credit and $7,560 to receive the maximum four credits for the year.

You can check how many credits you have through the SSA’s website or your Social Security statement.

How Work Credits Affect OASDI Eligibility

You need enough Social Security credits to meet eligibility requirements for Social Security benefits. The number of credits you need for program eligibility depends on the type of benefit as follows:

• Social Security retirement benefits: If you were born in 1929 or later, you’d need 40 credits or 10 years of work for retirement benefit eligibility.
• Disability benefits: You will need between 20 to 40 credits for Social Security Disability Insurance (SSDI), depending on your age when your disability begins. For example, a person 31 or older must have at least 20 work credits in the decade before the disability began.
• Survivors benefits: The number of credits needed to provide survivors benefits to family members depends on the deceased worker’s age. Some people can get benefits if the earner has just six credits in the three years before death.

Credits are not needed for Supplemental Security Income (SSI) eligibility. Instead, the SSI program is for a disabled adult or child with low income and resources. SSI benefits come out of the Disability Insurance Trust Fund (DI trust fund). They are held in an account separate from the Old-Age and Survivors Insurance Trust Fund (OASI).

OASDI for Retired Workers

Many people don’t claim any Social Security benefits until they retire. At that point, OASDI insured workers can receive financial support based on their retirement age and income history.

During your life, you’ll likely earn more credits than the minimum number needed for eligibility. The extra credits you earn don’t increase your benefit amount. Instead, your monthly benefit is determined by your average indexed monthly earnings (AIME) over your working years.

Retirement benefits also depend on your age at retirement. You’ll receive your full benefit at full retirement age (FRA).

You’ll receive a reduced benefit if you begin receiving benefits before your FRA. You may choose early retirement as early as 62, but doing so may reduce benefits by up to 30%. Spousal benefits may also be reduced. On the other hand, you’ll receive your largest benefit by delaying retirement until age 70. Don’t forget that you’ll have to pay your Medicare premiums when you retire.

Have Questions About Social Security?

Sometimes, setting yourself up for success in retirement requires a little help. Contact a Social Security attorney if you need benefits or retirement planning assistance. A Social Security attorney can help you figure how long you have until you can retire with full benefits and how to maximize your retirement income from OASDI.