
SEP IRA vs. Solo 401(k) vs. SIMPLE IRA in 2026: Contribution Limits, Deadlines, and the Tax Math for Solo Owners With and Without Employees
Solo owner with $140K profit can do $28K SEP, $35K Solo 401(k), or $16K SIMPLE — same profit, different deductions. Match the plan to employees, profit, and whether you need the deduction by December 31 or April 15.










