Quick Answer
Retirement contributions to SEP-IRAs and Solo 401(k)s reduce self-employment tax by lowering your net self-employment income. If you earn $100,000 and contribute $25,000 to a Solo 401(k), you save approximately $3,825 in self-employment taxes (15.3% on the reduced income base).
Best Answer
Priya Sharma, Small Business Tax Analyst
Freelancers with consistent income who want to maximize both retirement savings and tax benefits
How retirement contributions reduce your self-employment tax burden
Retirement contributions work as a double tax benefit for freelancers. Not only do they reduce your income tax, but certain types also reduce your self-employment tax by lowering your net self-employment income before the 15.3% self-employment tax is calculated.
According to IRS Publication 560, contributions to SEP-IRAs, Solo 401(k)s, and other qualified retirement plans are deducted from your Schedule C income before calculating self-employment tax on Schedule SE.
Example: $100,000 freelancer with $25,000 Solo 401(k) contribution
Let's see the exact tax savings for a freelancer earning $100,000:
Without retirement contribution:
With $25,000 Solo 401(k) contribution:
Total tax savings: $3,524 in self-employment tax + additional income tax savings on $25,000 at your marginal rate
Which retirement plans reduce self-employment tax
Key factors that maximize your savings
What you should do
Start by calculating your maximum allowable contribution using your net self-employment income. Then set up automatic transfers to fund your retirement account throughout the year. This strategy works best when planned early in the tax year.
Use our deduction finder tool to identify all retirement contribution opportunities and calculate your exact tax savings.
Key takeaway: A $25,000 Solo 401(k) contribution on $90,000 of net self-employment income saves approximately $3,524 in self-employment taxes plus additional income tax savings at your marginal rate.
*Sources: [IRS Publication 560](https://www.irs.gov/pub/irs-pdf/p560.pdf), [Schedule SE Instructions](https://www.irs.gov/pub/irs-pdf/i1040sse.pdf)*
Key Takeaway: Solo 401(k) and SEP-IRA contributions reduce both income tax and self-employment tax, providing double tax savings that can total $3,500+ annually on a $25,000 contribution.
Self-employment tax savings comparison by retirement plan type for a freelancer with $100,000 net income
| Plan Type | Max Contribution | SE Tax Savings | Setup Difficulty |
|---|---|---|---|
| Solo 401(k) | $61,000 | $9,333 | Moderate |
| SEP-IRA | $25,000 | $3,825 | Easy |
| Simple IRA | $16,500 | $2,525 | Easy |
| Traditional IRA | $7,000 | $0 | Easy |
More Perspectives
Priya Sharma, Small Business Tax Analyst
Freelancers with high income who need maximum retirement contribution strategies
Advanced strategies for high-earning freelancers
When you're earning $100,000+ as a freelancer, retirement contributions become your most powerful tax reduction tool. The combination of income tax savings and self-employment tax reduction can save you $15,000-20,000 annually.
Solo 401(k) vs. SEP-IRA comparison for high earners
For a freelancer with $150,000 net self-employment income:
Solo 401(k) maximum contribution:
SEP-IRA maximum contribution:
The Solo 401(k) allows $23,500 more in contributions and saves an additional $3,595 in self-employment taxes.
Defined benefit plans for ultra-high earners
If you're consistently earning $200,000+, consider a defined benefit plan that can allow contributions of $100,000-250,000 annually, all of which reduce self-employment tax. However, these require actuarial calculations and administrative costs of $3,000-5,000 annually.
Quarterly estimated tax strategy
Reduce your quarterly estimated tax payments based on planned contributions. If you plan to contribute $50,000 annually, reduce each quarterly payment by approximately $12,500 to account for the tax savings.
Key takeaway: High earners can save $15,000-20,000 annually through strategic retirement contributions, with Solo 401(k)s typically providing the best combination of high contribution limits and self-employment tax reduction.
Key Takeaway: High earners can save $15,000-20,000 annually through strategic retirement contributions, with Solo 401(k)s providing the highest contribution limits and maximum self-employment tax reduction.
James Okafor, Self-Employment Tax Specialist
Freelancers in their first year who are learning about self-employment tax and retirement planning
Getting started with retirement contributions as a new freelancer
As a new freelancer, understanding how retirement contributions reduce your self-employment tax can seem overwhelming, but it's one of the most valuable tax strategies you'll learn.
The basics: What is self-employment tax?
Self-employment tax is 15.3% (12.4% Social Security + 2.9% Medicare) on your net freelance income. Unlike W-2 employees who split this with their employer, you pay both portions. On $50,000 of freelance income, that's approximately $7,065 in self-employment taxes.
Start simple with a SEP-IRA
For new freelancers, a SEP-IRA is often the best starting point:
Example for a $40,000 first-year freelancer
Without retirement contribution:
With $10,000 SEP-IRA contribution:
What to do in your first year
1. Track your net self-employment income monthly
2. Set aside 15-20% for retirement contributions
3. Open a SEP-IRA account with a low-cost provider
4. Make contributions by your tax filing deadline
5. Adjust quarterly estimated tax payments to account for contributions
Key takeaway: Even new freelancers can save thousands in taxes through retirement contributions - a $10,000 SEP-IRA contribution typically saves $3,500+ in combined income and self-employment taxes.
Key Takeaway: New freelancers can save $3,500+ annually on a $10,000 retirement contribution through combined income tax and self-employment tax reduction, making it one of the most powerful tax strategies available.
Sources
- IRS Publication 560 — Retirement Plans for Small Business
- Schedule SE Instructions — Self-Employment Tax Calculation
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.