One of the many issues facing self-employed individuals is how to save for retirement. Of course, one option is to open a traditional or Roth IRA. However, the annual maximum contribution ($5,500 for 2018 if you are under age 50) is low in terms of retirement planning. Therefore, the self-employed often look to adopt employer-sponsored retirement plans. While there are a number of options, the Solo 401(k) is one of the most popular arrangements. Not only does the Solo 401(k) produce higher contribution levels than other arrangements, but employer contributions are tax deductible! Of course, like anything else, there are pros and cons.