All the deductions should be on the pay stub. I wouldn't use the word non-taxable, since very few deductions are taxable, in the sense that if you have them, your taxes go up. Some are after tax, which means they don't affect your tax, and some are pretax which means you taxes are calculated ignoring the fact that you actually earned the money. Assuming they meant pretax, common pretax deductions are 401k (unless it is a Roth 401k), and medical, dental, and disability insurance premiums, all three of which may be but are not necessarily pretax. After tax deductions are the various taxes withheld, employee stock purchase plan deductions, etc. You should ask your HR department what applies in your company.