Solo 401(k) vs. Roth IRA: Retirement Planning for Business Owners in 2026
Solo 401(k) vs Roth IRA: both can help self-employed people build retirement wealth, but they have different eligibility rules, contribution limits and tax treatments. A Roth IRA is an individual account; a Solo 401(k) is an employer-sponsored plan generally designed for an owner with no eligible non-spouse employees. Depending on your circumstances, you may be able to use both.
When I left the 9-to-5 world, no HR department handed me a retirement plan. I had to build my own. I run a money coaching business, contribute to my Solo Roth 401(k), and prioritize maxing out my Roth IRA. That’s part of how I make space for travel while investing for the future.
What’s the difference between a Solo 401(k) and a Roth IRA?
A Roth IRA is funded with eligible personal contributions, subject to income and annual limits. A Solo 401(k) can allow contributions in two capacities: as the employee and as the employer, within plan and compensation limits. Roth 401(k) employee deferrals are different from traditional pre-tax deferrals. Employer contribution treatment depends on plan design and applicable rules.
What are the 2026 retirement contribution limits?
For 2026, the standard IRA contribution limit is $7,500 and the standard employee 401(k) deferral limit is $24,500. The general defined-contribution annual additions limit is $72,000, before applicable catch-up contributions. Those are ceilings, not promises: compensation, age, other plans, income and business structure can change what you’re eligible to contribute. Check current IRS guidance and your plan documents before making a contribution.
Does a Solo Roth 401(k) reduce taxes this year?
Roth contributions generally do not reduce current federal taxable income. The attraction is different: qualified distributions can be tax-free later. Traditional pre-tax contributions may offer a current deduction, depending on the situation. I call myself a Roth FREAK because I value the long-term strategy, not because Roth is automatically best for everyone.
Do you have to contribute before December 31?
Not necessarily. Different deadlines apply to IRA deposits, plan establishment, employee deferral elections and employer contributions, and special rules can apply to sole proprietors and other businesses. Don’t confuse the tax-year deadline with the deposit deadline. Ask your accountant or plan administrator which rules apply to your business before making a year-end decision.
My Q4 retirement checklist
- Confirm whether you qualify for a Solo 401(k) and review any existing workplace plans.
- Check your eligible compensation, income limits and remaining contribution room.
- Decide whether Roth or traditional contributions fit your tax situation.
- Verify the plan setup, election and deposit deadlines for your business.
- Automate contributions that your cash flow can comfortably support.
For me, building wealth as a business owner means having the freedom to travel, explore nature and take time off without asking a boss for permission.
Frequently asked questions
Can I contribute to both a Roth IRA and Solo 401(k)?
Often yes, if you meet the rules for each account. Your available contribution room depends on your circumstances.
Can an LLC open a Solo 401(k)?
Potentially. Eligibility depends on the business and its employees, not just the letters LLC.
Is a Solo Roth 401(k) better than a Roth IRA?
Neither is universally better. Contribution capacity, fees, investments, withdrawal rules and tax strategy all matter.
What if I cannot max out either account?
Start with a sustainable contribution and revisit it as revenue changes. Building a repeatable system matters more than chasing a maximum you cannot afford.
For related Q4 preparation, read my Business Taxes 101 year-end guide.
Find more money in the business you already own
Your next financial breakthrough might not require another launch. I teach LGBTQ+, BIPOC, first-gen and neurodivergent business owners how to optimize cash, credit, investments and business benefits.
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About Charly Stoever
I’m Charly, a money coach, former stockbroker and host of the Unicorn Millionaire podcast. Since 2020 I’ve helped people optimize their cash, credit and investments to grow wealth on their own terms. I believe your business should fund your life—not consume it.
Educational information only, not individualized tax, legal or investment advice. Consult a qualified professional about your circumstances.
