How to Go on Disability: A Step-by-Step Guide to Applying for SSDI

If you're wondering how to "go on disability," you're most likely asking about Social Security Disability Insurance (SSDI) — the federal program that pays monthly benefits to people who can no longer work due to a serious medical condition. The process has defined steps, but the outcome at each one depends heavily on your individual situation.

Here's how the program works, from eligibility through approval.

What "Going on Disability" Actually Means

SSDI is not a welfare program. It's an insurance program you pay into through your paycheck — the FICA taxes withheld from your wages. If a disability prevents you from working, SSDI replaces a portion of your lost income.

It's separate from SSI (Supplemental Security Income), which is needs-based and doesn't require a work history. Some people qualify for both. Most applicants filing based on their own work record are applying for SSDI.

Step 1: Check Whether You Meet the Basic Requirements

Before applying, two broad gates determine whether you're eligible to receive SSDI at all.

Work Credits

SSDI requires a sufficient work history. The SSA measures this in work credits, which you earn by working and paying Social Security taxes. In 2024, you earn one credit for every $1,730 in wages, up to four credits per year. Most applicants need 40 credits total, with 20 earned in the last 10 years — though younger workers need fewer.

If you haven't worked enough, SSDI may not be available to you regardless of your medical condition.

Medical Eligibility

The SSA defines disability strictly. To qualify medically, you must have a condition — physical or mental — that:

• Has lasted or is expected to last at least 12 months, or is expected to result in death
• Prevents you from performing substantial gainful activity (SGA)

SGA is a dollar threshold that adjusts annually (in 2024, it's $1,550/month for non-blind applicants). If you're earning above SGA, the SSA will generally not consider you disabled, regardless of your condition.

Step 2: File Your Application

You can apply:

• Online at ssa.gov
• By phone at 1-800-772-1213
• In person at your local SSA office

You'll need to document your medical history, treatment records, work history, and the date your disability began — this is your alleged onset date (AOD). The onset date matters because it affects how far back your benefits could potentially go.

Gather records from every doctor, hospital, or specialist who has treated your condition. Gaps in medical documentation are one of the most common reasons claims stall or get denied.

Step 3: The SSA Reviews Your Claim 🔍

After you file, your application goes to a state-level agency called Disability Determination Services (DDS). A DDS examiner — working with a medical consultant — reviews your records against SSA's criteria.

They assess your Residual Functional Capacity (RFC): what you can still do despite your impairment. Your RFC is compared against your past work and, depending on your age and education, other jobs in the national economy.

Initial decisions typically take 3 to 6 months, though timelines vary by state and claim complexity.

Approval rates at the initial stage are relatively low — many valid claims are denied here. That's not the end of the road.

Step 4: If You're Denied, You Can Appeal

The SSA has a four-level appeals process:

The ALJ hearing is where many claimants are ultimately approved. Approval rates at this level are significantly higher than at the initial stage. Deadlines matter — you typically have 60 days to file each level of appeal.

Step 5: If Approved, Understand How Benefits Work

When Payments Start

SSDI has a 5-month waiting period from your established onset date before benefits begin. That means the SSA doesn't pay for the first five months of your disability — even if you're approved.

Back Pay

If there's a gap between your onset date and your approval date, you may be owed back pay — retroactive benefits covering that period (minus the five-month wait). This can be a significant lump sum for people who waited months or years through appeals.

Monthly Benefit Amount

Your benefit is calculated from your average lifetime earnings — not your recent income alone. There is no flat rate. Benefit amounts vary widely from person to person and adjust annually with cost-of-living adjustments (COLAs).

Medicare

SSDI recipients become eligible for Medicare after 24 months of receiving disability benefits. Some people also qualify for Medicaid in the gap — depending on their state and income.

What Shapes Your Outcome 🎯

No two SSDI cases follow the same path. Key variables include:

• Your medical condition and how well-documented it is
• Your work history and whether you have enough credits
• Your age and education, which factor into vocational assessments
• Your RFC — what work, if any, you can still perform
• Your onset date and how long ago your disability began
• Whether you're already earning income and how it compares to SGA

Someone with a well-documented severe condition, a strong work history, and no current income faces a very different process than someone with a borderline RFC, limited records, or recent self-employment income.

The program's rules are defined. How those rules apply to any individual's medical file, earnings record, and personal history — that part only plays out case by case.