Self-Employment Side Hustle? Benefits of a Solo 401(k) Plan

A Solo 401(k) offers business owners and side hustlers a powerful way to reduce taxable income and accelerate retirement savings. This guide explains contribution limits, tax strategies, and how to choose between pre-tax and Roth contributions in 2026. Learn how to build a tax-efficient retirement plan and potentially eliminate income taxes on self-employment income. Discover why Solo 401(k) plans can outperform SEP IRAs in many cases.