Learn About SSDI and Social Security Retirement Benefits

Understanding Social Security: Two Main Programs

Social Security provides two separate benefit programs that serve different purposes and have different rules. The first is Social Security Disability Insurance (SSDI), which provides monthly payments to people who cannot work due to a medical condition. The second is Social Security Retirement Benefits, which provides monthly payments to people who have reached a certain age and have worked long enough under Social Security.

Many people think these programs are the same, but they operate under different rules. SSDI focuses on your medical condition and work history. You do not need to reach any particular age to receive SSDI—what matters is whether you have a severe condition that prevents substantial work. Retirement benefits, by contrast, are based primarily on your age and work history. Your medical condition does not matter for retirement benefits.

Both programs use a system called "credits" to measure your work history. You earn credits by working and paying Social Security taxes. In 2024, you earn one credit for every $1,730 in wages (this amount changes yearly). Most people need 40 credits total to be considered for either program, though the rules differ slightly. For SSDI, you typically need 20 of those 40 credits earned within the 10 years before you stop working. For retirement benefits, you need 40 credits total, but when you earn them matters less.

As of 2024, about 67 million Americans receive some form of Social Security benefits. Approximately 8 million receive SSDI payments, while about 47 million receive retirement benefits. Understanding which program applies to your situation is the first step toward learning how Social Security may work for you.

Practical Takeaway: Social Security has two distinct programs—disability and retirement—with different rules and requirements. Your situation determines which program may be relevant to you.

How SSDI Works: Disability Benefits Explained

Social Security Disability Insurance provides monthly cash payments to workers who have a medical condition severe enough to prevent them from working. The program also covers certain family members—spouses and children—who may receive payments based on the worker's record.

To receive SSDI payments, Social Security requires that your condition meet a specific definition of disability. The condition must be expected to last at least 12 months or result in death. It must also prevent you from performing substantial work, which Social Security defines as earning more than a certain monthly amount (in 2024, this is $1,550 per month). A condition like a broken arm that will heal in a few weeks would not meet this definition, but a permanent spinal cord injury or advanced stage cancer would.

Social Security maintains a list called the "Blue Book" that describes medical conditions it recognizes as disabling. This list includes conditions such as arthritis, diabetes, back injuries, cancer, heart disease, and mental health conditions like depression and anxiety disorders. However, having a condition on the Blue Book does not automatically mean you will receive benefits. Social Security examines medical records, work history, age, and education to make a decision. A younger person with the same condition as an older person may be evaluated differently because younger workers have more work-life remaining.

The application process for SSDI involves submitting medical evidence. You will need recent medical records from doctors who have treated you, test results, and documentation of your symptoms and limitations. The more detailed your medical records, the clearer the picture Social Security has of your condition. Many people are initially denied SSDI, but they can request reconsideration or request a hearing before an administrative law judge. About 70% of claims are initially denied, but approximately 60-70% of people who appeal to a judge eventually receive benefits.

SSDI also includes a program called "Ticket to Work" that allows beneficiaries to test their ability to work without immediately losing benefits. Under this program, you can attempt to work and earn income while still receiving some benefits. If your work attempt is unsuccessful and you cannot sustain employment, you can return to receiving full benefits without having to reapply.

Practical Takeaway: SSDI is based on your medical condition and work history. Strong medical documentation is essential, and initial denial does not mean benefits are unavailable—appeals often succeed.

Social Security Retirement Benefits: Age, Work, and Payments

Social Security Retirement Benefits provide monthly payments to workers who have reached a certain age and have accumulated enough work credits. Unlike SSDI, your health does not affect your retirement benefits. You could be perfectly healthy and still receive retirement payments once you reach the required age and have worked long enough.

The age at which you can begin receiving retirement benefits depends on your birth year. This age is called your "Full Retirement Age" or "Normal Retirement Age." For people born in 1943 through 1954, full retirement age is 66. For people born in 1960 or later, full retirement age is 67. For people born between these years, the full retirement age falls somewhere in between, increasing gradually by a few months per year. You can begin receiving reduced retirement payments as early as age 62, but the longer you wait to start payments, the larger your monthly payment will be.

The amount of your retirement benefit depends on your lifetime earnings record. Social Security calculates your payment using your highest 35 years of earnings. If you worked fewer than 35 years, Social Security counts zero earnings for the missing years, which lowers your average. This is why people who worked steadily for 40 years typically receive larger payments than people who worked for only 10 or 15 years.

In 2024, the average monthly Social Security retirement payment is approximately $1,907 for a retired worker. The maximum payment for someone who waits until age 70 to claim benefits can exceed $3,800 per month. However, these amounts are not fixed—they change each year based on inflation. Social Security adjusts payments annually through a Cost-of-Living Adjustment (COLA). In 2024, benefits increased by 3.2% due to inflation.

Your retirement payment also depends on when you decide to claim benefits. If you claim at age 62, you receive about 70% of your full retirement benefit. If you wait until your full retirement age, you receive 100%. If you wait until age 70, you receive about 124% of your full retirement benefit. This means waiting longer results in significantly larger monthly payments for the rest of your life, but you receive fewer total payments because you start later.

Retirement benefits can also be paid to family members. A spouse who is at least 62 years old may receive up to 50% of your retirement benefit amount. Children under 19 (or up to 23 if in school full-time) may also receive payments based on your work record.

Practical Takeaway: Retirement benefits depend on your age, work history, and when you choose to start receiving payments. Waiting longer to claim results in larger monthly payments.

Calculating Your Benefits and Work Credits

Understanding how Social Security calculates your benefit amount can help you plan for retirement or disability. The calculation process differs between SSDI and retirement benefits, but both begin with your work history and the credits you have earned.

Work credits form the foundation of both programs. You earn credits by working jobs where you or your employer pays Social Security taxes. Self-employed workers pay both the employee and employer portion of Social Security taxes. The amount of money you earn determines how many credits you receive—higher earnings do not result in more credits per year, only in a higher benefit amount later. The maximum number of credits you can earn in one year is four, which happens when your annual earnings reach a certain threshold (in 2024, you earn four credits by earning $6,960 or more).

Most workers need 40 work credits total to be considered for any Social Security benefits. This typically takes about 10 years of full-time work. However, if you worked part-time or took time out of the workforce for caregiving, military service, or other reasons, you may have fewer credits. You can view your exact work record and credit count by creating an account on the Social Security website and viewing your Social Security Statement, which is available free online.

For SSDI specifically, you also need "recent work credits." Most people under 31 need only six credits earned in the three years before their disability begins. People 31 and older typically need 20 credits earned within the 10 years before disability, plus an additional number of credits based on age. A 45-year-old would need about 28 total credits, while a