
Solo 401(k) vs. SEP-IRA for the Self-Employed: 2026 Limits, the Roth Option, and the Pro-Rata Trap
For the self-employed, a Solo 401(k) often shelters more than double what a SEP-IRA does at the same income — a $90,000 earner can contribute $47,000 vs. $22,500 in 2026. This guide covers the limits, the Roth option, the pro-rata rule, and the December 31 deferral deadline.










