Is SSDI Taxable When You're Also Receiving Long-Term Disability Benefits?

Receiving both SSDI and long-term disability (LTD) benefits at the same time is more common than most people realize — and it creates a tax situation that confuses a lot of recipients. The short answer is: SSDI can be taxable, and LTD benefits usually are taxable, but how much you actually owe depends on factors specific to your household. Here's how the rules work.

How SSDI Taxation Works

SSDI benefits are governed by federal income tax rules set by the IRS, not the Social Security Administration. Whether your SSDI is taxable depends on your combined income — a specific calculation that includes:

• Your adjusted gross income (AGI)
• Any nontaxable interest
• Half of your SSDI benefit amount

The IRS calls this your "combined income" (sometimes called provisional income). Two thresholds determine how much of your SSDI, if any, is subject to federal tax:

⚠️ These thresholds have not been adjusted for inflation since they were written into law in the 1980s and 1990s — which means more recipients cross them today than Congress originally intended.

Important: "Up to 85%" means a maximum of 85 cents of every dollar in SSDI benefits can be included in your taxable income. It does not mean you pay 85% in taxes on those benefits. The included amount is taxed at your ordinary income tax rate.

How Long-Term Disability Benefits Are Taxed

LTD benefits come from private insurance policies — either purchased individually or provided through an employer. The tax treatment depends on who paid the premiums:

• Employer-paid premiums: LTD benefits are generally taxable as ordinary income. This is the most common scenario for employer-sponsored group disability plans.
• Employee-paid premiums with pre-tax dollars: Benefits are typically taxable.
• Employee-paid premiums with after-tax dollars: Benefits are generally not taxable, because you already paid tax on the money used to buy the coverage.

This distinction matters enormously when you're trying to figure out your total tax picture — and it's something your LTD insurer should be able to clarify in your policy documents.

Why Receiving Both at the Same Time Complicates Things 💡

Most LTD policies include an offset provision — meaning the insurer reduces your monthly LTD payment by the amount you receive from SSDI. This is standard. It's why many LTD insurers actively assist (or pressure) beneficiaries to apply for SSDI.

But here's the tax wrinkle: even after the offset reduces your LTD check, both income streams still count for tax purposes. Your SSDI still factors into the combined income calculation. Your LTD benefit — even the reduced amount — is still potentially taxable based on how the premiums were paid.

The result: your total gross income before the offset may be higher than what actually lands in your bank account, but the IRS looks at the gross figures when determining your tax liability.

SSDI Back Pay and Taxes

Many people are approved for SSDI after a long wait and receive a lump-sum back pay award covering months or even years of past benefits. This can create a significant tax event in a single year.

The IRS allows a method called lump-sum election, which lets you spread the taxable portion of back pay across the prior years it was owed — rather than counting the entire amount as income in the year you received it. This can reduce your overall tax liability. It does not require filing amended returns; it's calculated on your current return using IRS Form 8915 or Schedule R procedures and the instructions in IRS Publication 915.

State Taxes on SSDI

Federal rules don't tell the whole story. Most states do not tax SSDI benefits, but a handful do — and the rules vary. Some states with income taxes exempt SSDI entirely; others follow federal rules; a few have their own thresholds. Your state's department of revenue is the authoritative source here.

LTD benefits may also be subject to state income tax depending on where you live and how the policy was structured.

The Variables That Shape Your Actual Tax Bill

No article can tell you what you'll owe. The factors that determine your real tax liability include:

• Your total household income, including wages, investment income, and any other benefits
• Your filing status (single, married filing jointly, head of household)
• Whether your SSDI includes a large back pay lump sum
• Whether your LTD premiums were paid pre-tax or after-tax
• Your state of residence
• Whether you have dependent exemptions or deductions that reduce AGI

A recipient with modest SSDI benefits, no other income, and after-tax LTD premiums may owe nothing. A recipient with significant SSDI back pay, employer-paid LTD, a working spouse, and investment income could face a meaningful tax bill. Same two programs — very different outcomes.

The mechanics of how SSDI and LTD are taxed are knowable. How those mechanics apply to your income, your household, and your policy is the piece that no general guide can fill in for you.