How to File for Long-Term Disability: SSDI vs. Private Coverage Explained

When people search "how do I file for long-term disability," they're often talking about two very different things — and mixing them up can cost time and money. Long-term disability (LTD) can refer either to a private insurance benefit (usually through an employer) or to Social Security Disability Insurance (SSDI), the federal program administered by the Social Security Administration (SSA). The filing process, eligibility rules, and timelines are completely different for each.

This article focuses primarily on SSDI — how to file, what the process looks like, and what shapes the outcome.

SSDI vs. Private Long-Term Disability Insurance

Before filing anything, it helps to know which program you're dealing with.

Many people receiving private LTD benefits are also encouraged — sometimes required by their insurer — to apply for SSDI as well. If SSDI approves you, the private insurer typically offsets your LTD payments by the SSDI amount.

How to File for SSDI: The Basics

SSDI is a federal insurance program. You paid into it through payroll taxes (FICA), and eligibility depends on two main things: work credits and a qualifying medical disability.

Step 1 — Confirm You Have Enough Work Credits

The SSA measures work history in credits, earned based on annual income. As of 2024, you earn one credit per $1,730 in covered earnings, up to four credits per year (these thresholds adjust annually). Most workers need 40 credits total, with 20 earned in the last 10 years before becoming disabled. Younger workers may qualify with fewer credits.

If you haven't worked enough in covered employment, you may not be insured under SSDI — but you might still qualify for SSI (Supplemental Security Income), a needs-based program with different rules.

Step 2 — File Your Application

You can apply three ways:

• Online at SSA.gov (fastest and available 24/7)
• By phone at 1-800-772-1213
• In person at your local SSA office

You'll need to provide your Social Security number, birth certificate, medical records, work history, contact information for your doctors, and details about your condition. The SSA will ask about your alleged onset date — the date you claim your disability began — which matters for calculating potential back pay.

Step 3 — DDS Reviews Your Medical Case 🔍

After you apply, the SSA sends your file to your state's Disability Determination Services (DDS) office. DDS examiners review your medical records and may request a consultative examination (paid for by SSA) if your records are incomplete. They evaluate whether your condition meets or equals a listed impairment in SSA's "Blue Book," and if not, whether your Residual Functional Capacity (RFC) — what you can still do despite your condition — prevents you from doing your past work or any other work.

Initial decisions typically take three to six months, though timelines vary by state and case complexity.

If You're Denied: The Appeals Process

Most initial SSDI applications are denied. That's not the end of the road. The SSA has a formal appeals process:

1. Reconsideration — A different DDS examiner reviews the case (skipped in some states under the SSA's prototype process)
2. ALJ Hearing — A hearing before an Administrative Law Judge, where you can present testimony and new evidence; this is where many approvals happen
3. Appeals Council — If the ALJ denies your claim, you can request review by the SSA's Appeals Council
4. Federal Court — The final option if all administrative appeals are exhausted

Each stage has strict deadlines — generally 60 days to appeal after receiving a decision. Missing those windows can mean starting over.

What Shapes Your Outcome

No two SSDI cases are identical. Results depend on a combination of factors:

• Medical severity and documentation — Well-documented conditions with objective findings tend to move through review more smoothly
• Your RFC — How your condition limits you physically and mentally, and whether those limits rule out substantial gainful activity (SGA)
• Age — The SSA's grid rules make it easier for workers 50 and older to be found disabled, particularly when limited to sedentary work
• Education and work history — Someone with no transferable skills and limited education faces a different vocational analysis than someone with office experience
• Onset date — Establishing an earlier onset date means more potential back pay, which accumulates from your onset date minus a five-month waiting period

SGA also matters throughout the process. In 2024, earning more than $1,550/month (or $2,590 if blind) generally disqualifies you from receiving SSDI, though these figures adjust annually.

After Approval: A Few Things to Know 📋

If approved, SSDI benefits begin after a five-month waiting period from your established onset date. Medicare eligibility starts 24 months after your first month of entitlement to SSDI benefits — not the date you applied or were approved.

Back pay is paid in a lump sum and covers the period from your onset date (minus the five-month wait) through your approval date.

The Part Only You Can Answer

The SSDI process is structured and knowable — but how it plays out in any specific case depends entirely on the medical evidence in that person's file, their work record, their age, and dozens of smaller factors that only emerge when someone actually reviews the claim. Understanding the process gets you ready. Applying it to your own history is the step that follows.