<human>:  What is the difference between an IRA and a 401k?
<bot>: The main difference between an IRA and a 401k is the contribution limits and rules. An IRA allows you to contribute up to $6,000 per year while a 401k can allow up to $19,500 per year. Additionally, an employer may make additional contributions to a 401k as a form of employee benefit. Another difference is the tax aspect; contributions to a 401k are taken before taxes, while traditional IRA contributions are made with after-tax dollars.