Most self-employed Americans are leaving
thousands of dollars in tax deductions on the table every single year — simply because they chose the wrong retirement account. If you are a freelancer, content creator, cannabis business owner, or sole proprietor, retirement planning is one of the most powerful tax strategies available to you. In 2026, the IRS allows self-employed individuals to shelter up to $72,000 annually using a SEP-IRA, or up to $71,500 using a Solo 401(k) — with the Solo 401(k) almost always delivering more for lower-income earners.
This guide covers everything you need to know
about retirement planning for self-employed individuals, including the full SEP-IRA vs. Solo 401(k) comparison, 2026 contribution limits, common mistakes, and how to choose the right account for your income level.
What Is Retirement Planning for Self-Employed Individuals?
Retirement planning for self-employed individuals means choosing and funding tax-advantaged accounts specifically designed for people who work for themselves. Unlike employees who can access a company 401(k), self-employed people in the United States must set up their own retirement plans. Fortunately, the IRS offers options that are actually more generous than most employer plans — if you know how to use them.
The two most popular accounts for self-employed
individuals in the USA are the SEP-IRA and the Solo 401(k). Each offers significant tax deductions, tax-deferred growth, and the ability to build substantial retirement wealth. However, they work very differently, and choosing the wrong one for your income level can cost you tens of thousands of dollars in missed deductions every year.
What Is a SEP-IRA?
A SEP-IRA — Simplified Employee Pension Individual Retirement Account — is a retirement plan designed for self-employed individuals and small business owners. The employer (which is you, if you are self-employed) makes contributions to the plan. Employees cannot contribute to a SEP-IRA on their own behalf. For 2026, the SEP-IRA contribution limit is 25% of eligible compensation for employees, or approximately 20% of net self-employment income for sole proprietors, up to a maximum of $72,000. SEP-IRAs are extremely simple to set up, carry minimal administrative costs, and have no annual IRS filing requirements unless the plan’s total assets exceed $250,000.
What Is a Solo 401(k)?
A Solo 401(k) — also called a self-employed 401(k) or individual 401(k) — is a retirement plan available exclusively to self-employed individuals with no full-time employees other than a spouse. Unlike a SEP-IRA, a Solo 401(k) allows both an employee deferral contribution and an employer profit-sharing contribution. For 2026, the employee deferral cap is $23,500 (or $31,500 if you are age 50 to 59, or $34,750 if you are age 60 to 63, under the SECURE 2.0 Act enhanced catch-up provision). The combined employer and employee limit is $71,500 for 2026. The ability to contribute both as the employee and as the employer makes the Solo 401(k) dramatically more powerful at lower income levels.
How Do SEP-IRA and Solo 401(k) Contribution Limits Work in 2026?
The 2026 contribution limits for both accounts are the highest in history. Understanding how each limit works — and how income level affects your actual allowable contribution — is the key to making the right choice.
2026 SEP-IRA Contribution Limits
For 2026, you can contribute up to 25% of your eligible compensation to a SEP-IRA, with a maximum of $72,000. For self-employed individuals filing a Schedule C, the effective rate works out to approximately 20% of net self-employment income — because you must first deduct half of your self-employment tax from net earnings before calculating the contribution amount. You need roughly $360,000 in net self-employment income to contribute the full $72,000. There are no catch-up contributions for workers age 50 or older in a SEP-IRA, which is a meaningful disadvantage for older self-employed individuals.
One major advantage of the SEP-IRA is its contribution
deadline. You can make SEP-IRA contributions for the 2026 tax year as late as your business tax filing deadline, including extensions — which can push the deadline to September or October 2027 for many self-employed filers. This flexibility makes the SEP-IRA attractive for people who determine their contribution amount at tax time.
2026 Solo 401(k) Contribution Limits
For 2026, the Solo 401(k) allows a combined employee and employer contribution of up to $71,500. The employee deferral portion is $23,500 for participants under age 50. Workers age 50 to 59 can contribute up to $31,500 as an employee. Workers age 60 to 63 can contribute up to $34,750 under the enhanced catch-up provision introduced by SECURE 2.0. The employer profit-sharing portion adds approximately 20% of net self-employment income on top of the employee deferral.
This structure creates a significant advantage
at lower income levels. For example, a sole proprietor with $60,000 in net self-employment income can contribute roughly $12,000 to a SEP-IRA. That same person with a Solo 401(k) can contribute $23,500 as the employee plus approximately $12,000 as the employer — totaling $35,500. The gap narrows as income rises and effectively closes once net self-employment income exceeds approximately $238,000.
The employee deferral portion of a Solo 401(k) must be
elected and funded by December 31 of the tax year. However, the employer profit-sharing contribution can be made up to the tax filing deadline, including extensions.
IRS Reference
For official IRS guidance on self-employed retirement plans, visit the IRS page on One-Participant 401(k) Plans and IRS Publication 560 — Retirement Plans for Small Business (available at IRS.gov, opens in new tab). These documents cover contribution calculations, plan document requirements, and filing obligations.
Common Mistakes Self-Employed People Make With Retirement Accounts
Many self-employed individuals set up a retirement account and then lose thousands in tax benefits due to avoidable errors. Here are the most costly mistakes Tranzesta sees consistently.
Mistake 1: Choosing a SEP-IRA When Income Is Below $175,000
The SEP-IRA is simpler, but it is almost always the worse choice for self-employed individuals earning less than $175,000 in net self-employment income. At $80,000 in net income, a SEP-IRA allows roughly $16,000 in contributions. A Solo 401(k) allows $23,500 in employee deferrals alone — plus the same $16,000 employer contribution, for a total of approximately $39,500. That is a $23,500 gap, which at a 37% combined federal and state tax rate represents over $8,000 in immediate tax savings per year.
Mistake 2: Missing the Employee Deferral Election Deadline
Solo 401(k) employee deferrals must be elected by December 31 of the tax year — not by the tax filing deadline. Many self-employed individuals who set up their Solo 401(k) in November or December forget to make the formal salary deferral election before year-end. If you miss it, the IRS does not allow you to count that contribution as an employee deferral for that tax year, significantly reducing your allowable contribution.
Mistake 3: Contributing the Same Percentage to a SEP-IRA for Employees and Keeping Less for Yourself
SEP-IRA rules require employers to contribute the same percentage of compensation to every eligible employee’s account — including full-time employees who have worked for the business for at least three of the past five years and earned at least $800 in 2026. Therefore, if you contribute 20% of net self-employment income to your own SEP-IRA, you must also contribute 20% to every eligible employee’s account. This can make the SEP-IRA prohibitively expensive for business owners with employees.
Mistake 4: Ignoring Roth Solo 401(k) Contributions
Many Solo 401(k) plans now allow Roth contributions — meaning you contribute after-tax dollars that grow tax-free and are never taxed on withdrawal. For self-employed individuals in lower tax brackets today but expecting higher income in retirement, Roth Solo 401(k) contributions can be dramatically more valuable than traditional pre-tax contributions. Additionally, unlike Roth IRAs, Roth Solo 401(k) contributions have no income limits.
Mistake 5: Not Opening a Solo 401(k) Before Hiring the First Non-Spouse Employee
The moment you hire a full-time employee who is not your spouse, you become ineligible for a Solo 401(k). Many business owners discover this only after they have hired their first employee — and must then switch to a SEP-IRA or another plan type at significantly lower contribution levels. If hiring is on your horizon, maximize Solo 401(k) contributions now.
Step-by-Step Guide: How to Set Up Retirement Planning as a Self-Employed Individual
Follow these steps to build the most tax-efficient retirement plan for your self-employed income in 2026.
Step 1: Calculate Your Net Self-Employment Income
Your allowable retirement contributions depend on your net self-employment income — gross income from your business minus all allowable deductions, including business expenses, the deductible portion of self-employment tax (half of your total SE tax), and any other deductions that reduce net earnings. Use IRS Schedule SE and Schedule C to confirm this figure before choosing a plan.
Step 2: Compare Your Maximum Allowable Contribution Under Each Account
Use the following rule of thumb: if your net self-employment income is below $175,000, the Solo 401(k) almost always allows a higher contribution. Above $175,000, the gap narrows significantly. Above $238,000, both plans approach the same maximum. Run the actual numbers with a tax professional before committing to a plan type.
Step 3: Check Whether You Have Eligible Employees
If you have full-time W-2 employees other than a spouse who have worked for you for at least three of the past five years and earned more than $800 in 2026, the Solo 401(k) is not available to you. In that case, a SEP-IRA or a SIMPLE IRA — a Savings Incentive Match Plan for Employees that allows contributions up to $16,500 in 2026 — may be your best option.
Step 4: Open the Plan With a Qualifying Custodian
Solo 401(k) plans must be opened through a financial institution or brokerage that offers them — such as Fidelity, Vanguard, Schwab, or a self-directed custodian. Importantly, Solo 401(k) plans must be established by December 31 of the tax year in which you want to begin contributions. SEP-IRAs can be established as late as your tax filing deadline, including extensions.
Step 5: Make the Salary Deferral Election for a Solo 401(k)
If you set up a Solo 401(k), make your written salary deferral election before December 31. This election specifies how much of your compensation you are contributing as the employee. Without this election, you cannot claim employee deferrals for that tax year — only the employer profit-sharing portion.
Step 6: Calculate and Fund the Employer Profit-Sharing Contribution
Both SEP-IRA and Solo 401(k) employer contributions can be funded up to the tax filing deadline, including extensions. Work with a CPA to calculate the exact employer contribution amount after your year-end financials are complete. In many cases, you will not know your exact net self-employment income until tax preparation is underway.
Step 7: File Required Forms With the IRS
SEP-IRAs require no annual IRS filing unless plan assets exceed $250,000. Solo 401(k)s require filing IRS Form 5500-EZ once plan assets exceed $250,000. Your CPA should track this threshold and file the form on time — failure to file carries a penalty of $250 per day, up to $150,000.
Learn more about self-employed tax planning
strategies at Tranzesta.com.
How Tranzesta Can Help With Retirement Planning for Self-Employed Individuals
Tranzesta is a US-based tax consultation firm that specializes in self-employed tax strategy, including retirement account selection and contribution optimization. We serve freelancers, OnlyFans and content creators, cannabis business owners, sole proprietors, and self-employed professionals of all types across the United States.
Choosing between a SEP-IRA and Solo 401(k) is not a one-size-fits-all decision.
The right answer depends on your exact net self-employment income, your projected income for future years, whether you have or plan to hire employees, your age and catch-up contribution eligibility, and whether Roth contributions make sense for your tax situation. Tranzesta calculates these figures precisely and builds a tax-optimized retirement contribution strategy that maximizes your deductions without overfunding — which triggers costly IRS penalties.
Additionally, Tranzesta integrates retirement planning with your full tax picture — including quarterly estimated tax payments, self-employment tax reduction strategies, and business entity structuring. Many self-employed clients discover that the right combination of retirement contributions and entity structure can reduce their effective tax rate by 10 percentage points or more.
Contact our team at hello@tranzesta.com for a free consultation. We help self-employed individuals across the USA build retirement strategies that reduce taxes today while building wealth for tomorrow.
Visit Tranzesta.com to learn more about our self-employed tax planning and bookkeeping services.
Retirement Planning Self-Employed SEP-IRA Solo 401k: Expert Tips for 2026
Here are the most powerful strategies for self-employed retirement planning in 2026, drawn from Tranzesta’s work with self-employed clients across the United States.
Stack your Solo 401(k) with a backdoor Roth IRA. If your income exceeds the Roth IRA income phase-out ($165,000 for single filers in 2026), you can make a non-deductible traditional IRA contribution of $7,500 and immediately convert it to a Roth IRA — a process called a backdoor Roth. This adds $7,500 per year in tax-free retirement savings on top of your Solo 401(k) contributions.
Open your Solo 401(k) now if you are considering one
for 2026. Solo 401(k) plans must be established by December 31. Many self-employed individuals wait until tax season only to discover they cannot open the plan retroactively. Act now if you have not already.
Use SEP-IRA contributions to reduce a prior-year tax bill.
If you filed an extension for your 2025 tax return, you can still open and fund a SEP-IRA and deduct the contribution on your 2025 return — up to the extended filing deadline. SEP-IRAs are one of the few retirement accounts that allow this level of prior-year flexibility.
Consider an S-corp election for income above $80,000.
Structuring your business as an S corporation reduces your self-employment tax burden and changes how Solo 401(k) contributions are calculated — potentially allowing even higher deductible contributions relative to your net income. Tranzesta helps clients model the before-and-after tax impact of an S-corp election.
Revisit your plan choice annually. Income fluctuates.
The account that was optimal at $120,000 in net income may not be optimal at $220,000. Review your retirement contribution strategy with a tax professional every year and adjust as your income changes.
Never miss Form 5500-EZ. Once your Solo 401(k) plan
assets exceed $250,000, IRS Form 5500-EZ is required annually. The penalty for late filing is $250 per day — up to $150,000 total. Set a calendar reminder and build this into your annual tax compliance process.
Conclusion
Retirement planning for self-employed individuals is one of the most powerful tax strategies available in the United States. Three points matter most in 2026. First, if your net self-employment income is below $175,000, the Solo 401(k) almost always allows significantly higher tax-deductible contributions than a SEP-IRA. Second, Solo 401(k) employee deferral elections and plan
establishment must happen by December 31 — not the tax
filing deadline — making early action essential. Third, the right retirement account choice integrates with your entire tax strategy, including quarterly estimated taxes, self-employment tax reduction, and entity structure.
Choosing the wrong plan can cost you thousands
of dollars annually in missed deductions. Choosing the right one — and contributing the optimal amount — can reduce your effective tax rate significantly while building long-term wealth.
Ready to get expert help? Email us at hello@tranzesta.com or visit Tranzesta.com to schedule your free tax strategy session today.
FAQs
Retirement planning for self-employed individuals offers two main options: the SEP-IRA and the Solo 401(k). The key difference is how contributions are calculated. A SEP-IRA only allows employer contributions — capped at 25% of compensation (roughly 20% of net self-employment income for sole proprietors), up to $72,000 in 2026. A Solo 401(k) allows both employee deferrals (up to $23,500 in 2026) and employer profit-sharing contributions, making it more powerful at lower income levels. The Solo 401(k) also allows catch-up contributions for workers age 50 and older; the SEP-IRA does not.
A self-employed person can contribute up to $72,000 to a SEP-IRA in 2026, but no more than 25% of eligible compensation — or approximately 20% of net self-employment income for sole proprietors after adjusting for self-employment tax. For example, a sole proprietor with $100,000 in net self-employment income can contribute roughly $18,587 to a SEP-IRA in 2026. You need approximately $360,000 in net compensation to contribute the full $72,000 maximum. SEP-IRA contributions are tax-deductible and can be made up to the business tax filing deadline, including extensions.
Generally, you cannot maximize both a SEP-IRA and a Solo 401(k) for the same self-employment activity, because the IRS annual additions limit applies across all plans funded by the same employer. However, if you have two separate self-employment businesses — for example, a freelance consulting business and a side gig — you may be able to maintain one plan per employer entity, subject to IRS rules. This is a complex area of tax law. Consult a qualified tax professional before attempting to maintain multiple retirement plans simultaneously.
A Solo 401(k) offers significant tax benefits for self-employed individuals. Traditional (pre-tax) contributions reduce your taxable income dollar for dollar in the year you contribute, which directly lowers your federal income tax liability. For a self-employed person in the 32% federal tax bracket contributing $40,000 to a Solo 401(k), that contribution alone saves $12,800 in federal income taxes. Earnings inside the account grow tax-deferred until withdrawal. Roth Solo 401(k) contributions offer the alternative benefit of tax-free growth and tax-free withdrawals in retirement, with no income limits for eligibility.
The deadlines differ between the two accounts. For a Solo 401(k), the employee deferral portion must be elected and funded by December 31, 2026. The employer profit-sharing contribution can be made up to the tax filing deadline, including extensions — typically October 2027 for self-employed filers who request extensions. For a SEP-IRA, all contributions for the 2026 tax year can be made up to the tax filing deadline, including extensions. However, the Solo 401(k) plan itself must be established by December 31, 2026 — you cannot open one retroactively after year-end.