A retirement plan has lots of benefits for you, your business, and your employees. Retirement plans allow you to invest now for financial security when you and your employees retire, and today both Traditional 401(k)s and Roth 401(k)s can be offered. Traditional 401(k)s are tax-deferred accounts, which means you fund your account with pretax dollars and pay taxes on your distributions in retirement. Roth 401(k)s are funded with post-tax money, and you don't pay any taxes on your distributions in retirement.