Long-term disability (LTD) is optional insurance you buy through your employer that replaces part of your income if you cannot work for months or years due to illness or injury

It is not the same as Social Security Disability Insurance (SSDI). SSDI is a federal program you pay into through payroll taxes and can claim only after a five-month waiting period and a strict medical review. Long-term disability is a private insurance policy—usually offered during open enrollment at your job—that starts paying you after a shorter waiting period (often 90 days) and uses your employer's own definition of disability, which is usually less strict than SSDI's.

Whether you should buy it depends on three things: how much income you could afford to lose, whether you have other savings or insurance, and what your employer actually covers. Most people who turn it down regret it only after they need it, because by then it is too late to enroll.

Key Takeaways

  • Long-term disability replaces 50 to 70 percent of your salary if you cannot work, starting after a waiting period that is usually 90 days.
  • You pay the premium (often $10 to $40 per month) through payroll deduction, and your employer may pay part or all of it.
  • LTD uses your employer's definition of disability, which typically means you cannot do your own job, not that you cannot work at all—this is easier to meet than SSDI's standard.
  • If you receive LTD benefits, they usually reduce or stop when you start receiving SSDI, so the two programs work together, not separately.
  • You can only enroll during open enrollment or within 30 days of a life event like marriage or birth; you cannot buy it later if you become sick or injured.

How long-term disability actually works

When you enroll in an LTD plan, you choose a waiting period—usually 30, 60, or 90 days—before benefits start. During that time you use paid time off, short-term disability (if your employer offers it), or your own savings. After the waiting period ends and your doctor confirms you cannot work, the insurance company begins sending you a monthly check.

That check replaces a percentage of your gross salary, typically 50 to 70 percent. If you earn $4,000 per month and your plan pays 60 percent, you receive $2,400 per month. The exact amount depends on the plan your employer chose. Some plans cap the monthly benefit at a fixed dollar amount—for example, $5,000 per month maximum—regardless of your salary.

Benefits continue until you return to work, reach retirement age (usually 65), or the plan's maximum benefit period ends. Maximum periods vary: some plans pay for two years, others for five years, and some until age 65. Read your plan documents to know which applies to you.

The cost and who actually pays it

Your employer deducts the premium from your paycheck, usually between $10 and $40 per month depending on your age, salary, and the plan's generosity. Some employers pay the entire premium themselves; others split it with you; a few require you to pay all of it. During open enrollment, you will see the exact cost for your plan.

If your employer pays the premium, any benefits you receive are taxable income—you will owe federal and state income tax on the monthly checks. If you pay the entire premium yourself with after-tax dollars, the benefits are tax-free. This matters: a $2,400 monthly benefit is worth less if you owe 25 percent in taxes than if you owe nothing. Ask your employer's benefits team who pays the premium for your plan.

The cost is usually low enough that most people can afford it, but only if they enroll during open enrollment. Once that window closes, you cannot buy coverage unless you have a may have access to life event—marriage, birth of a child, loss of other insurance—and even then, only within 30 days of that event.

Long-term disability versus SSDI: how they interact

Long-term disability and SSDI are not competing programs; they are designed to work together. LTD pays first and faster. SSDI pays later but potentially for longer. If you become disabled, you will likely receive LTD benefits while you wait for SSDI to be decided (which takes three to six months on average, longer if you appeal).

Once you are approved for SSDI, your LTD benefits usually reduce by the amount of your SSDI check. This is called an "offset." If your LTD pays $2,400 per month and SSDI approves you for $1,800 per month, your LTD check drops to $600 per month. You still receive $2,400 total, but now it comes from both sources instead of one.

This matters for planning: LTD is not a substitute for SSDI, and SSDI is not a substitute for LTD. You need both. LTD gets you through the waiting period and the approval process. SSDI provides the long-term safety net if your disability lasts years.

When you should enroll and when you cannot

Enroll during open enrollment if you possibly can. Open enrollment usually happens once per year, often in the fall, and lasts two to four weeks. During that window, you can buy coverage without proving you are healthy. Your employer's benefits team will send you an email with dates and a link to enroll online.

If you miss open enrollment, you can still enroll if you have a may have access to life event: marriage, divorce, birth or adoption of a child, loss of health insurance, or a significant change in your spouse's benefits. You must enroll within 30 days of the event. After that, the window closes until the next open enrollment.

If you become ill or injured and did not enroll, you cannot buy LTD coverage. The insurance company will not sell it to you because you are now a high-risk applicant. This is why people regret not enrolling: by the time they need it, it is too late. Enroll now, even if you feel healthy.

What "disability" means under your employer's plan

Your LTD plan defines disability in its own terms, and that definition is usually more generous than SSDI's. Most employer plans say you are disabled if you cannot perform the duties of your own occupation. This means if you are a surgeon and lose the use of your hands, you are disabled—even if you could work as a consultant or teacher.

SSDI uses a much stricter standard: you must be unable to do any substantial work, not just your current job. This is why some people receive LTD benefits but are initially denied SSDI. The LTD company approves them under the "own occupation" rule; SSDI denies them because they could theoretically do other work.

Read your plan's definition of disability before you enroll. Some plans are "own occupation" for two years, then switch to "any occupation" after that. Others use "any occupation" from the start. The difference affects how long you can collect benefits if you recover enough to do a different job.

Questions to ask your employer before enrolling

Before open enrollment ends, contact your employer's benefits team or human resources department and ask these questions in writing (email is fine). Keep the answers.

  • Who pays the premium—the employer, the employee, or both? If both, what is the split?
  • What percentage of salary does the plan replace, and is there a monthly maximum?
  • What is the waiting period, and can I choose a shorter one?
  • What is the maximum benefit period—how long will the plan pay?
  • Does the plan use "own occupation" or "any occupation" to define disability?
  • If I receive SSDI, how much will my LTD benefit reduce?
  • Are the benefits taxable, and if so, at what rate?
  • Can I increase my coverage later, or is this the only chance to enroll?

Frequently Asked Questions

What if my employer does not offer long-term disability?

You can buy an individual LTD policy on your own, but it will cost more than an employer plan and may require a medical exam. Some professional associations (for teachers, nurses, or lawyers, for example) offer group LTD plans to members at lower rates. If you have no access to LTD and become disabled, you will rely entirely on SSDI, which takes months to approve and replaces only part of your income.

Can I enroll in LTD if I already have a health condition?

During open enrollment, yes—employer plans cannot deny you or charge more based on your health. Outside open enrollment, you would need a may have access to life event. If you have a chronic illness, enroll during open enrollment even if you think you might not need it; once you leave the job or miss the enrollment window, you cannot buy it back.

What happens to my LTD if I change jobs?

Your coverage ends when you leave the employer. Some plans allow you to convert to an individual policy, but the premium will be much higher. If you change jobs, enroll in your new employer's LTD plan during open enrollment if they offer one. There is usually a gap in coverage between jobs, which is another reason to enroll as soon as you can.

Does long-term disability cover mental health conditions?

Most plans do cover mental health disabilities like depression, anxiety, and bipolar disorder, but some have limits—for example, they may pay for only two years instead of five. Read your plan documents or ask your benefits team. Mental health disabilities are common reasons for LTD claims, so confirm your coverage before you need it.

If I am already receiving SSDI, can I buy long-term disability?

No. LTD requires that you be actively working and able to work at the time you enroll. Once you are on SSDI, you are not working, so no employer will offer you LTD and no insurance company will sell you an individual policy. This is why enrolling while you are healthy and employed is so important.