Ask most business owners how they picked their retirement plan, and you’ll usually hear some version of “our CPA set us up with a 401(k) a while back.” That’s not wrong, it’s just incomplete, and incomplete is often expensive.
When business owners aren’t optimizing the plans available to them, we’ve seen it cost them anywhere from $50,000 to $200,000+ a year in taxes they didn’t have to pay.
A 401(k) is a foundation, not a ceiling. What follows is one common structure we see work well for small business owners: four layers, each building on the last.
Not every business needs all four. The point is knowing what’s available, so the decision is deliberate, not just whatever got set up years ago and never revisited.
Layer 1: The Foundation — Safe Harbor 401(k)
A standard 401(k) has a problem for owners specifically: how much you can contribute is often capped by how much your staff contributes. If your team saves at a low rate, the IRS limits what you, as a highly compensated employee, can put in, regardless of the actual annual limit.
A Safe Harbor 401(k) solves this:
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- The company guarantees a contribution to employees (typically a fixed match or a flat percentage of pay)
- In exchange, the plan is exempt from the testing that would otherwise cap owner contributions
- You can use the 401(k) up to the full annual limit, without your own savings being held hostage by your team’s participation rate
This is why it’s such a common starting point: every eligible employee gets a real, guaranteed benefit, not just a workaround for the owner. For a closer look at how this compares to other small business options, see Safe Harbor 401(k) or Simple IRA?.
Layer 2: Profit-Sharing — Elective, But Still Broad-Based
Profit-sharing sits on top of the 401(k). Unlike the safe harbor contribution, it’s discretionary. You decide each year whether to contribute, and how much, up to plan and IRS limits.
This layer does two things well:
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- It increases your business’s tax deduction in a good year, since contributions are deductible
- It still benefits your whole eligible team, not just you, functioning as both a tax tool and a broad-based benefit
Some profit-sharing formulas can be structured to reflect factors like age or compensation within IRS rules, but it remains a plan for the whole team. Think of it as a lever you can pull when the year supports it, not a fixed obligation.
How much are taxes costing you?
Layer 3: Cash Balance Plan — Where the Real Owner Leverage Is
This is where the numbers start to look different. A standard 401(k) caps individual contributions at a relatively modest annual limit. As discussed in A $400,000 Tax Deduction, we’ve seen Cash Balance Plans let owners we work with contribute $400,000 (or more) per year. At the 37% tax bracket, that saves $148,000 in tax.
A few things worth knowing about how this works:
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- Cash balance plans are required to include eligible employees, but with the right plan design, the required contribution for staff is often a small fraction of what the owner can contribute
- That required staff contribution is frequently far less than what the same dollar amount would otherwise disappear to in taxes
- Most owners we talk to would rather direct meaningful dollars toward their team than send an equivalent amount to the IRS. A cash balance plan, designed properly, can do both at once
This layer isn’t right for every business. It works best for owners with consistent profitability who are ready to commit to funding the plan for several years, but for the right business, it’s often the single biggest lever available.
Layer 4: Selective Benefits — For Your Most Critical People
The first three layers apply broadly across your team. This layer doesn’t, by design. It lets you reward the handful of people whose departure would hurt your business, without extending the same cost to everyone on payroll.
Two common tools:
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- Executive Bonus (162) Plans, funded by the company, serve to retain your key employees
- Non-Qualified Deferred Compensation (NQDC) lets a high-earning employee defer salary or bonus beyond what a 401(k) allows, with contributions matched by some companies
We’ve covered both in more depth, including how they connect to protecting your business if you lose a key person, in.
How Many Layers Does Your Business Actually Need?
There’s no universal answer:
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- A newer business with tight margins might do well with just a Safe Harbor 401(k) for now
- A more established, consistently profitable business might be ready for all four
- The right mix depends on your profitability, your age and timeline to retirement, and how much you’re already doing for key people outside the retirement plan
What matters is that the decision is made on purpose, with your financial, tax, and plan design team looking at the whole picture together, rather than a plan set up once and never revisited as the business grew.
If it’s been a while since you’ve looked at what’s layered into your plan, or whether there should be more, that’s worth a conversation with our team.
The “Alterra” name was coined by joining the Latin roots “alter”, the origin of the word “altruism” with “terra” meaning earth or land. This name reflects the company philosophy of “clients before profits” and providing firmly grounded advice.


