One advantage of owning a business is that you have more control over how you save for retirement.
One disadvantage is that somebody has to decide what to do with all that control.
SEP IRA, SIMPLE IRA, Solo 401(k), traditional 401(k), profit sharing, cash balance plan. It's easy to line them up by contribution limit and assume the one that allows the most money must be best.
Sometimes it is. Often it isn't.
Because when I work through this with a business owner, the question isn't only how much can you contribute. It's what are you trying to accomplish, what can the business actually support, and who else does this decision affect?
Start With the Problem You're Solving
Not every business owner needs the most sophisticated plan available.
You might be a solo consultant who wants a tax-advantaged way to save considerably more than an IRA allows. You might have five employees and want to offer a real benefit without taking on administration you don't want. You might be in your fifties with a highly profitable practice, trying to make up ground after years of reinvesting everything in the company. Or attracting and keeping good employees might matter to you as much as your own contribution.
Those are four different problems, and they point toward different plans.
Solo 401(k): When It's Just You
A Solo 401(k), sometimes called an individual 401(k), is designed for an owner-only business, generally meaning no employees other than a spouse.
The reason it allows larger contributions than an IRA is structural: the owner can contribute in two capacities, as an employee making salary deferrals and as the employer making a separate contribution, subject to applicable rules and limits. Two contribution paths, one person.
But I wouldn't choose one just because the ceiling is high. I want to know whether you'll actually fund it, whether your income supports the strategy, and whether you're planning to hire. Because once you have eligible non-spouse employees, a solo plan generally can't stay a solo plan.
The right plan isn't only the one that fits the business you have. It should also fit the business you're building.
SEP IRA: Simplicity, and the Part People Miss
A SEP IRA is frequently used by self-employed people and small business owners, and its main appeal is that it's relatively simple to establish and maintain. That's worth something. Not every owner wants another system to administer.
Here's the part that changes the decision. A SEP is funded entirely by employer contributions, and when the employer contributes, contributions are generally made at the same percentage of compensation for every eligible employee.
Which means the arithmetic that looks appealing when you're thinking only about yourself becomes a different proposition with a staff. Contributing 15% of your own compensation may also mean contributing 15% for everyone eligible.
That isn't a reason to rule it out. It's a reason to know where your headcount is going before you choose.
SIMPLE IRA: The Name Tells You Part of It
A SIMPLE IRA is built for eligible small employers and offers a less complex way to provide a workplace retirement plan.
Employees can generally make salary reduction contributions, and the employer has a required contribution, typically structured either as a match for participating employees or as a contribution for all eligible employees regardless of whether they participate.
For the right company, that simplicity is a genuine advantage. The tradeoff is that employee deferral limits are generally lower than under a 401(k), so if the primary goal is maximizing what a high-earning owner can set aside, another structure may serve better.
The question is never whether a SIMPLE IRA is good. It's whether it's good for this business, this owner, these employees, and these goals.
Traditional 401(k) and Profit Sharing: More Flexibility, More Moving Parts
As a company grows, a traditional 401(k) becomes worth considering. There's far more flexibility in how the plan can be designed, and it can be a meaningful benefit when you're competing for people.
It also carries real administration: nondiscrimination testing, potential employer contributions, annual reporting, recordkeeping, and compliance obligations. Certain safe harbor designs can simplify some of the testing in exchange for required employer contributions. None of that is a reason to avoid a 401(k). It's a reason to understand what you're taking on.
Profit sharing usually gets discussed alongside it. Despite the name, it doesn't mean employees receive a literal share of profits. It's an employer contribution component that can be added to certain plan designs, and the allocation formula is where it gets interesting: depending on employee demographics and the design used, some formulas can direct a larger share toward owners and other older or longer-tenured participants.
Whether that works depends entirely on the specific numbers in your business, which is exactly the point at which a blog article stops being useful. A qualified plan professional or third party administrator can model designs against your actual census. Your CPA handles the tax implications. My job is knowing how much you're genuinely trying to save and why, so the design is solving the right problem.
Cash Balance Plans
This is where things get interesting for certain high-earning owners.
A cash balance plan is a type of defined benefit plan. Rather than a defined contribution amount, participants have hypothetical account balances, and contributions are generally determined actuarially. One consequence matters a great deal for your situation: because the calculation is driven partly by how many years remain until retirement, contribution capacity is often significantly larger for older participants.
That's why these come up most often for established, consistently profitable owners in their late forties and fifties who are trying to accelerate. They're frequently paired with a 401(k) and profit sharing rather than used alone.
The tradeoffs are real. More complexity, actuarial work, ongoing administration, and an annual funding obligation that doesn't simply pause because the business had a rough year.
So when someone hears "you could put away substantially more," I want to add: maybe, and now let's find out whether you should. For a business with dramatic swings in income, or an owner who needs liquidity elsewhere, the answer may be no.
Capacity to contribute isn't the same as capacity to commit.
Your Employees Can Change the Entire Calculation
This is the point I most want business owners to absorb.
When you research retirement plans online, everything is framed around what you can contribute. Your employees are frequently what determines whether a plan makes sense at all.
How many people work for you. What they earn. How long they've been there. Their ages. Whether you're hiring. What obligations a given structure would create.
Those facts can materially change both the cost and the right design. And that isn't inherently bad news. You may genuinely want to offer a strong retirement benefit, and it may be part of how you compete for people worth having.
If so, treat it as one of the goals from the start, rather than as a surprise discovered after the plan is already in place.
A Deduction Is Not a Goal
Taxes matter, and in your highest earning years the treatment of retirement contributions can be very attractive.
But I don't want the deduction driving the decision. Not if it leaves the business undercapitalized, or has you maximizing contributions while carrying expensive debt, or locks up money you'll need before retirement age.
First decide what the money needs to do. Then decide which account should hold it. Tax planning helps you choose between good options. It shouldn't manufacture the strategy.
This Decision Will Come Up Again
You're not choosing a structure for the next thirty years.
The right plan for a solo practice isn't necessarily right once you hire. The right plan while you're growing may not be right at 55 when the business is highly profitable and retirement is in view. What suits five employees may not suit fifty.
That's normal. Planning isn't making one perfect decision and never revisiting it. It's revisiting it as the facts change.
So Which Plan Is Best?
There isn't one, and I'd be skeptical of anyone who answers before asking about your business.
These are the questions that actually narrow it:
Do you have employees, or expect to?
How much are you genuinely trying to save each year?
How predictable is profitability?
How much does flexibility matter to you?
How much administration are you willing to take on?
What benefit are you trying to provide your employees?
How does this fit the rest of your personal financial plan?
Answer those, then compare only the structures that fit. That's a better process than starting with whichever plan has the biggest number attached to it.
For women business owners and professionals in San Ramon, Danville, Dublin, Pleasanton, Walnut Creek, and throughout the Tri-Valley and East Bay, this decision tends to matter more as the business gets more successful, because you finally have real capacity to save. That's a good problem to have.
Now it just has to work for the company and for the financial life you're building outside of it. I've written about how those two connect in Financial Planning for Women Business Owners.
Because the goal was never to have an impressive retirement plan. The goal is enough personal wealth that eventually work becomes a choice.
If your business has grown and you're wondering whether your current plan still fits, that's a conversation I'd be glad to have.
About Mackie Chaudhry, CFP®
Mackie Chaudhry, CFP® is the founder of Soluna Wealth Planning in San Ramon, California. Soluna provides comprehensive financial planning for women and families, with a special focus on women business owners and professionals.
Mackie helps clients bring the pieces of their financial lives together: cash flow, investments, retirement planning, tax considerations, insurance, estate planning, and the major decisions in between. Her approach is warm, organized, and judgment free.
Soluna Wealth Planning serves clients in San Ramon, Danville, Dublin, Pleasanton, Walnut Creek, throughout the Tri-Valley and East Bay, and beyond.
This article is general education about retirement plan types and is not a recommendation of any particular plan, structure, or strategy. Retirement plan rules, eligibility requirements, contribution limits, and employer obligations are set by the IRS and change over time. Plan selection and design should be evaluated with your CPA, a qualified retirement plan professional, and your financial professional based on your specific circumstances.
The information in this material is not intended as tax or legal advice. Please consult legal or tax professionals for specific information regarding your individual situation. The opinions expressed and material provided are for general information and should not be considered a solicitation for the purchase or sale of any security.
Cetera Investors is a marketing name of Cetera Investment Services. Securities and Insurance products are offered through Registered Representatives of Cetera Investment Services LLC (doing insurance business in CA as CFG STC Insurance Agency LLC), Member FINRA, SIPC. Advisory services are offered through Cetera Investment Advisers LLC. Cetera is under separate ownership from any named entity.