Is social security disability income taxable if you are not of retirement age?

Social Security disability is taxable in the same fashion as retirement Social Security, regardless of the recipient's age or retirement status. If the individual's tax return shows income over a certain threshold amount, up to 85 percent of the benefits are taxable, according to Nolo.

The threshold depends on the recipient's marital status and tax-return filing status. The calculation involves adding all the other income on the tax return, including tax-exempt interest, to one-half of the Social Security benefits. For a joint return, both spouses' income is included. If this total is more than the threshold, some of the Social Security is taxable income, according to the Internal Revenue Service.