Quick Answer
For 2026, you can contribute up to $70,000 to a Solo 401(k) ($77,000 if 50+, $80,750 if 60-63). This includes $23,500 as an employee contribution plus up to 25% of your net self-employment income as an employer contribution, based on your Schedule C profit minus half of self-employment tax.
Best Answer
Priya Sharma, Small Business Tax Analyst
Self-employed individuals with consistent freelance income who want to maximize retirement savings
How Solo 401(k) contribution limits work in 2026
For 2026, Solo 401(k) plans allow total contributions up to $70,000 ($77,000 if you're 50 or older, $80,750 if you're 60-63 with the new super catch-up provision). However, your actual contribution depends on your net self-employment income from Schedule C.
The Solo 401(k) has two components: employee deferrals and employer contributions. As a self-employed person, you wear both hats.
Employee contribution limits for 2026
Your employee contribution cannot exceed 100% of your net self-employment income.
Employer contribution calculation
The employer portion is where it gets tricky. You can contribute up to 25% of your "compensation," but for self-employed individuals, compensation is your net self-employment income minus half of your self-employment tax.
Example: $100,000 Schedule C profit
Let's say your Schedule C shows $100,000 in profit:
1. Self-employment tax: $100,000 × 15.3% = $15,300
2. Half of SE tax: $15,300 ÷ 2 = $7,650
3. Net self-employment income: $100,000 - $7,650 = $92,350
4. Maximum employer contribution: $92,350 × 25% = $23,088
5. Employee contribution (if under 50): $23,500
6. Total contribution: $23,500 + $23,088 = $46,588
Contribution limits by income level
*Net SE income = Schedule C profit minus half of self-employment tax
Key factors that affect your contribution
What you should do
1. Calculate your net self-employment income using your Schedule C profit
2. Determine your maximum contribution based on the formulas above
3. Set up automatic quarterly contributions to maximize tax benefits
4. Consider Roth vs. traditional contributions based on your current vs. expected retirement tax bracket
Use our deduction finder to identify other retirement planning strategies that complement your Solo 401(k) contributions.
Key takeaway: With $100,000 in Schedule C profit, you can contribute up to $46,588 to a Solo 401(k) in 2026 — significantly more than the $7,000 IRA limit.
*Sources: [IRS Publication 560](https://www.irs.gov/pub/irs-pdf/p560.pdf), [IRS Revenue Procedure 2025-14](https://www.irs.gov/pub/irs-irbs/irb25-14.pdf)*
Key Takeaway: Solo 401(k) contributions can reach $70,000 in 2026, but your actual limit depends on your net self-employment income minus half of self-employment tax.
Solo 401(k) contribution limits by age for 2026
| Age Group | Employee Limit | Catch-Up | Total Employee | Combined Max* |
|---|---|---|---|---|
| Under 50 | $23,500 | $0 | $23,500 | $70,000 |
| 50-59 | $23,500 | $7,500 | $31,000 | $77,000 |
| 60-63 | $23,500 | $11,250 | $34,750 | $80,750 |
| 64+ | $23,500 | $7,500 | $31,000 | $77,000 |
More Perspectives
Priya Sharma, Small Business Tax Analyst
Established freelancers with substantial income who need advanced tax planning strategies
Maximizing contributions at higher income levels
With six-figure freelance income, you're likely hitting or approaching the maximum Solo 401(k) contribution limits. For 2026, the absolute maximum is $70,000 (or $77,000/$80,750 with catch-ups), but reaching this requires careful planning.
Income threshold for maximum contributions
To contribute the full $70,000, you need approximately $290,000+ in Schedule C profit. Here's why:
Advanced strategies for high earners
Defined Benefit Plans: If you're earning $250,000+, consider adding a defined benefit plan alongside your Solo 401(k). This can allow contributions of $100,000-$300,000+ annually, depending on your age and income consistency.
Backdoor Roth Conversions: With high current income, consider traditional Solo 401(k) contributions now and Roth conversions in lower-income years.
Quarterly Timing: Make contributions quarterly to maximize tax benefits and cash flow management. Don't wait until year-end.
Multiple business considerations
If you have multiple freelance businesses or LLCs, the contribution limits apply across ALL your businesses combined. You can't contribute $70,000 to each business's Solo 401(k) — it's $70,000 total.
Key takeaway: High earners should explore defined benefit plans and advanced Roth strategies beyond basic Solo 401(k) contributions to maximize retirement savings.
Key Takeaway: High earners may need $200,000+ in profit to maximize Solo 401(k) contributions and should consider defined benefit plans for even higher contribution limits.
James Okafor, Self-Employment Tax Specialist
First-year freelancers learning retirement planning basics and getting started with tax-advantaged savings
Getting started with Solo 401(k) contributions
As a new freelancer, a Solo 401(k) might seem overwhelming, but it's actually one of the most powerful tools for reducing your tax bill while saving for retirement. Don't worry about maximizing contributions in your first year — focus on understanding the basics.
Simple calculation for beginners
Here's an easier way to think about it: You can generally contribute about 20% of your Schedule C profit to a Solo 401(k). This accounts for both employee and employer portions.
Example with $40,000 first-year profit:
Start small and build up
Don't feel pressured to contribute the maximum. Even $2,000-$5,000 in your first year provides valuable tax savings:
Setting up your plan
1. Choose a provider: Fidelity, Vanguard, and Schwab offer low-cost Solo 401(k) plans
2. Establish by December 31st: You must set up the plan by year-end, but can contribute until your tax deadline
3. Start with simple investments: Target-date funds are perfect for beginners
4. Automate contributions: Set up monthly transfers to make saving painless
Common first-year mistakes to avoid
Key takeaway: New freelancers can contribute roughly 20% of Schedule C profit to a Solo 401(k), providing immediate tax savings even with modest contributions.
Key Takeaway: New freelancers should aim to contribute about 20% of their Schedule C profit and focus on establishing good saving habits rather than maximizing contributions.
Sources
- IRS Publication 560 — Retirement Plans for Small Business
- IRS Revenue Procedure 2025-14 — 2026 Cost-of-Living Adjustments
Reviewed by Priya Sharma, Small Business Tax Analyst on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.