Solo 401k Contribution Maximizer 2026
Calculate the maximum you can contribute to a Solo 401k and your estimated tax savings.
Tax Information Notice
This content is for informational and educational purposes only. It does not constitute tax, legal, or financial advice. Tax laws change frequently. Always consult a qualified CPA or Enrolled Agent for your specific situation.
Why Freelancers Should Max Out a Solo 401(k)
A Solo 401(k) — also called an Individual 401(k) or Self-Employed 401(k) — is the most powerful retirement savings vehicle available to freelancers and sole proprietors. With a $69,000 annual contribution limit (2026), it blows past the SEP IRA and Traditional IRA limits.
The key advantage: you wear two hats. As the "employee," you can defer up to $23,000 pre-tax. As the "employer," you can contribute up to 25% of your W-2 compensation (or ~20% of net SE income for sole proprietors). These two buckets combine for a potentially massive tax deduction.
Every dollar you contribute to a traditional Solo 401(k) reduces your taxable income dollar-for-dollar — saving you both income tax and helping reduce future SE tax as well. Use the calculator above to find your exact maximum contribution.
Frequently Asked Questions
What is the Solo 401(k) contribution limit for 2026?
In 2026, the Solo 401(k) total contribution limit is $69,000 ($76,500 if age 50+, with the $7,500 catch-up). This breaks down into an employee contribution (up to $23,000 or $30,500 with catch-up) and an employer contribution (up to 25% of W-2 wages or ~20% of net SE income for sole proprietors).
Solo 401(k) vs SEP IRA — which is better for freelancers?
The Solo 401(k) generally allows higher contributions at lower income levels because of the employee deferral component. At $50,000 net SE income, a Solo 401(k) lets you contribute ~$33,500 vs ~$9,283 in a SEP IRA. At $150,000+, the gap narrows. The Solo 401(k) also allows Roth contributions and loans.
Can I have a Solo 401(k) if I have a full-time W-2 job?
Yes, if you have self-employment income in addition to your W-2 job. However, your total employee deferrals across all 401(k) plans (W-2 and Solo) are capped at $23,000/year ($30,500 if 50+). The employer contribution portion of your Solo 401(k) is separate and can be maximized regardless.
When is the Solo 401(k) contribution deadline?
For sole proprietors and single-member LLCs: employee contributions must be made by December 31 of the tax year (or your business fiscal year-end). Employer contributions can be made by your tax return due date including extensions (typically October 15). You must establish the plan by December 31 of the tax year you want to use it.