SSDI benefits may be taxable depending on your total family taxable income. For example, a person filing as an 'individual' with a combined income between $25,000 and $34,000 would have to pay income taxes on 50 percent of the SSDI benefits. If the combined income is more than $34,000 then 85 percent of the SSDI benefit is taxable. You should consult with an experienced tax expert when your claim is approved to make certain that you plan for any tax liabilities.