With a small business 401(k) plan, you (and your employees, if you have them) can save for retirement while lowering your taxable income. Contributions you and your employees make to a 401(k) plan are contributed on a pre-tax basis. In the short term, that translates to a smaller tax bite on your annual salary. In the long run, it means extra security as your investments grow tax-free until you’re ready to retire.