How to Apply for Long-Term Disability Benefits Through SSDI

When people search "how do you apply for long term disability," they're often conflating two very different things: private long-term disability insurance (through an employer or individual policy) and Social Security Disability Insurance (SSDI), the federal program administered by the Social Security Administration. This article focuses on SSDI — the public program most working Americans pay into through payroll taxes and may rely on if a serious medical condition prevents them from working.

SSDI Is the Federal Long-Term Disability Program for Workers

SSDI isn't technically called "long-term disability" — but that's exactly what it is. It provides monthly income to people who have worked a sufficient number of years, paid Social Security taxes, and now have a medical condition expected to last at least 12 months or result in death that prevents them from doing substantial gainful activity (SGA).

The SGA threshold adjusts annually. In 2025, earning more than $1,620/month (gross) generally disqualifies someone from receiving SSDI — with a higher threshold for those who are blind.

The Two Ways to Apply

1. Online at SSA.gov The SSA's online application is available 24/7 and walks you through the process step by step. Most applicants can complete it in one to two hours, though gathering supporting documents beforehand significantly smooths the process.

2. In person or by phone You can call the SSA at 1-800-772-1213 to schedule an appointment at your local field office, or walk in. This option suits people who aren't comfortable with online forms or who have complex situations they want to explain directly.

There is no fee to apply for SSDI.

What the Application Actually Asks For

The application collects:

• Personal information — name, Social Security number, date of birth, contact details
• Work history — jobs held in the past 15 years, duties, hours, and physical/mental demands
• Medical information — doctors, hospitals, clinics, medications, diagnoses, and treatment history
• Employment status — whether you're currently working and how much you're earning

The SSA then forwards your medical file to your state's Disability Determination Services (DDS) office, where examiners review whether your condition meets their definition of disability. They assess your Residual Functional Capacity (RFC) — essentially, what work tasks you can still perform despite your condition.

What Happens After You Apply 📋

Many applicants are denied at the initial stage — not necessarily because they don't qualify, but because the medical evidence submitted isn't strong enough, or the application didn't fully describe functional limitations. The hearing stage, where an Administrative Law Judge (ALJ) makes an independent decision, has historically had higher approval rates than earlier stages.

Work Credits: The Eligibility Floor

SSDI isn't available to everyone — you must have worked long enough and recently enough under Social Security to have earned sufficient work credits. The exact number required depends on your age at the time you became disabled. Younger workers need fewer credits; most people over 31 need 20 credits earned in the last 10 years. Workers who become disabled in their 20s may qualify with far fewer.

This is one reason two people with identical medical conditions can have very different SSDI outcomes: one has the work history to qualify, and the other doesn't.

The Onset Date Matters More Than Most People Realize

Your alleged onset date (AOD) — the date you claim your disability began — directly affects how much back pay you may receive if approved. SSDI has a five-month waiting period from the established onset date before benefits begin. Back pay can cover months or years of missed payments, sometimes amounting to a significant lump sum.

Getting the onset date right is genuinely consequential, which is why the specifics of your medical records, employment history, and when you stopped working all factor into how this plays out.

After Approval: Medicare and Monthly Payments

Approved SSDI recipients receive monthly payments based on their lifetime earnings record — not a flat amount. The SSA publishes average figures annually, but individual benefit amounts vary considerably.

🗓️ After 24 months of receiving SSDI payments, beneficiaries automatically become eligible for Medicare — regardless of age. This is distinct from SSI, which typically comes with Medicaid eligibility instead.

What Shapes Your Individual Outcome

No two SSDI cases are identical. The factors that most directly determine what happens to a specific applicant include:

• The nature and severity of the medical condition — and how completely it's documented
• Work history and the type of work performed — sedentary vs. physical labor affects RFC analysis
• Age — the SSA's grid rules treat older workers differently, particularly those over 50
• Education — affects what other work the SSA believes you could perform
• Whether you're working — and how much you're earning relative to SGA
• State of residence — DDS offices vary in how they evaluate claims
• Application stage — initial denial doesn't end the process

Understanding the system is straightforward. Knowing where your own situation lands within it — that's the part only your specific records, history, and circumstances can answer.