Solo 401(k) and SEP IRA Deductions 2026: Max $69,000 Contribution

Why Retirement Plans Are the Ultimate Self-Employed Tax Deduction

Let me say this clearly: if you're self-employed in 2026 and not contributing to a retirement plan, you're leaving the single largest tax deduction available on the table. The math is staggering. A consultant earning $150,000 who contributes $23,000 to a Solo 401(k) reduces their taxable income to $127,000 — saving $5,520 in income tax (at 24%) and $3,248 in self-employment tax. That's $8,768 in tax savings — plus the money grows tax-deferred until retirement.

Solo 401(k): Maximum Flexibility for 2026

The Solo 401(k) is designed specifically for self-employed individuals with no employees (other than a spouse). It offers the highest contribution limits and the most flexibility:

• Employee deferral: $23,000 (or $30,500 if age 50+) — this is the "elective deferral" portion, based on your first $46,000 of net compensation in 2026
• Employer profit-sharing: Up to 25% of remaining net compensation — up to $46,000 (since total compensation is capped at $230,000 for 2026)
• Maximum total: $69,000 (under 50) or $76,500 (50+) including catch-up

Example: Jordan, a 47-year-old freelance tech consultant

• Net self-employment income: $200,000
• First, calculate net compensation: $200,000 × 92.35% = $184,700 (but capped at $230,000, so no reduction here)
• Employee deferral: $23,000
• Remaining compensation: $184,700 - $23,000 = $161,700
• Employer profit-sharing: 25% × $161,700 = $40,425
• Total contribution: $23,000 + $40,425 = $63,425
• Total tax saved (24% income + 15.3% SE): approximately $24,600

SEP IRA: Simplicity for Lower Earners

The SEP IRA (Simplified Employee Pension) is the simplest retirement plan available — no annual filings, no complex administration, just a brokerage account and a one-page IRS form. For 2026:

• Contribution limit: 25% of net self-employment compensation, capped at $69,000
• No catch-up contribution for those 50+ (a key limitation compared to Solo 401(k))
• Maximum contribution is lower than Solo 401(k) for those over 50

Example: Lena, a 34-year-old freelance writer earning $60,000

• Net SE compensation: $60,000 × 92.35% = $55,410
• Maximum SEP contribution: 25% × $55,410 = $13,852
• Tax saved (22% income + 15.3% SE): approximately $5,100
• Net cost of contributing $13,852: $13,852 - $5,100 = $8,752 — and the money grows tax-deferred

Solo 401(k) vs SEP IRA: Decision Framework

Roth vs Traditional: Which Saves More for 2026?

The Solo 401(k) and SEP IRA both offer Roth and traditional options. Here's the 2026 decision framework:

• Traditional: Deduct now, pay taxes in retirement. Best if you expect to be in a lower tax bracket in retirement.
• Roth: Pay taxes now, withdraw tax-free in retirement. Best if you expect to be in the same or higher bracket, or if you want tax-free withdrawals for estate planning.

For most self-employed people in their peak earning years, the traditional option provides more immediate cash flow. The $20,000 to $25,000 annual tax savings can be reinvested or used to cover business expenses. Younger freelancers in lower brackets may prefer Roth since their current tax rate is already low.

The Bottom Line for 2026

Retirement plan contributions are the most powerful tax deduction available to self-employed workers in 2026. The Solo 401(k) offers maximum flexibility with catch-up contributions and Roth options, while the SEP IRA provides simplicity for lower earners. Both reduce income tax and self-employment tax dollar-for-dollar. If you earn $60,000, a $13,852 SEP contribution saves roughly $5,100 in taxes. If you earn $200,000 and are over 50, a full $76,500 Solo 401(k) contribution saves more than $29,000 annually. Use our tax deduction finder to model different contribution levels, and cross-reference with our self-employment tax calculator to see the full impact on your tax bill. Set up your plan before December 31, 2026, to maximize your 2026 deduction — your future self will thank you.