How much is a person taxed if they withdraw their pension fund early before retirement age?

If you withdraw your pension fund before age 59 1/2, you might be taxed an additional 10 percent tax on early distribution of these funds. If applicable, the 10 percent tax is reported on line 58 of Form 1040.

You also must file Form 5329 (Additional Taxes on Qualified Plans and Other Tax-Favored Accounts) if either of the following apply. One, your distribution is taxable, and Box 7-Distribution Code(s) doesn't show Code 1 (Early distribution, no known exception, in most cases under age 59 1/2). Two, an exception applies but Box 7-Distribution Code(s) doesn't show any of these codes: 2 (Early distribution, exception applies, under age 59 1/2), 3 (Disability), or 4 (Death).