For many business owners in Phoenix and across the country, the standard 401(k) feels like a one-size-fits-all solution in a world that demands custom tailoring. You built your business on decisions that reflect your specific goals, your team, and your vision for the future. Your retirement strategy deserves the same level of intentional design. Defined contribution plans have evolved far beyond the basic employee-deferral model, and today’s business owners have access to sophisticated tools that allow them to maximize personal retirement savings while maintaining meaningful control over how contributions are allocated across their workforce.
Understanding those tools, and knowing when to use them, is where the real advantage lies.
Why the Standard 401(k) Leaves Owner Wealth on the Table
The traditional 401(k) is a powerful savings vehicle, but it was designed with broad participation in mind, not owner optimization. Under a standard plan, every eligible employee defers a percentage of their salary up to the IRS annual limit, and any employer match or profit-sharing contribution is generally applied on a uniform basis across the workforce. For a business owner who wants to direct a significantly larger portion of retirement savings toward themselves or toward key employees, this uniform structure creates a ceiling that feels frustratingly low.
Consider that the total annual addition limit under IRS Section 415 allows for contributions well above the standard deferral limit when employer contributions are factored in. In 2025, the combined limit reached $70,000 per participant. A business owner relying solely on employee deferrals captures only a fraction of that potential. The gap between what a standard plan permits and what a thoughtfully designed plan can achieve is often substantial, particularly for owners in higher income brackets who are closer to retirement and need to accelerate their savings trajectory.
This is exactly where alternative plan designs within the defined contribution plans framework begin to make a compelling case for themselves.
Cross-Tested Profit Sharing: Allocating Contributions Strategically
One of the most powerful tools available to business owners is the Cross-Tested Profit Sharing plan. Unlike traditional profit-sharing arrangements that allocate contributions as a flat percentage of compensation across all employees, a cross-tested design groups participants into separate allocation classes. The IRS tests the plan on the projected retirement benefit each group will receive, rather than on the current-year contribution percentages alone.
What this means in practice is that an owner-heavy allocation class can receive a significantly higher contribution rate than the rank-and-file employee class, provided the plan satisfies nondiscrimination testing on a “benefits” basis rather than a “contributions” basis. When the math works in the owner’s favor, the result can be dramatically higher contributions flowing to the people who built the business, while still maintaining a compliant and professionally managed plan.
Cross-Tested Profit Sharing works especially well when there is a meaningful age gap between the business owner and the majority of employees. Because projected retirement benefits are tied to the number of years contributions have to grow, older participants (often the owners) can justify larger current-year contributions even when the dollar amount looks disproportionate on the surface. For Phoenix-area business owners in their 40s and 50s with a younger workforce, this structure can be a genuine game-changer for retirement accumulation.
A retirement fiduciary or plan consultant familiar with cross-tested designs should be involved from the start. The actuarial modeling required to demonstrate compliance is not a do-it-yourself project, and the stakes of a failed nondiscrimination test are real. Getting the design right the first time, and reviewing it annually as the workforce changes, is essential to preserving the plan’s advantages.
Safe Harbor 401(k): Simplifying Compliance While Preserving Flexibility
For business owners who want to maximize their own salary deferrals without the risk of failing the Actual Deferral Percentage test (ADP test), the Safe Harbor 401(k) offers a straightforward solution. By committing to a mandatory employer contribution (either a match or a nonelective contribution), the plan automatically satisfies certain nondiscrimination tests, which allows highly compensated employees, including owners, to defer the maximum allowable amount regardless of how much rank-and-file employees contribute.
The Safe Harbor 401(k) is a particularly smart foundation for Phoenix-based business owners who want predictability in their compliance obligations. Running a standard 401(k) plan always carries the risk that low participation among non-highly compensated employees will cap what owners and key employees can defer. The safe harbor structure eliminates that uncertainty in exchange for a fixed employer contribution commitment, usually between 3% and 4% of eligible compensation.
Importantly, a Safe Harbor 401(k) can be combined with a profit-sharing layer on top, including a cross-tested profit-sharing component. This layered approach gives owners the best of both worlds: guaranteed maximum deferrals through the safe harbor structure, plus the ability to direct additional employer contributions strategically through the cross-tested allocation. For many business retirement strategies in Phoenix, this combination is the gold standard.
Adding a Defined Benefit Layer for Accelerated Owner Savings
While this discussion focuses primarily on defined contribution plans, it would be incomplete without acknowledging how a defined benefit plan can complement the strategies above. For business owners who have the cash flow to support higher contributions and want to accelerate retirement savings significantly, pairing a cash balance defined benefit plan with a 401(k)/profit-sharing combination can push total annual contributions well above what either plan type could achieve independently.
A cash balance plan is technically a defined benefit plan, but it functions in a way that feels more familiar to defined contribution plan participants: each participant has a notional account that grows through annual pay credits and interest credits. Because defined benefit contribution limits are based on funding a projected annuity benefit rather than a flat dollar cap, older business owners can often contribute $100,000 or more per year to a cash balance plan on top of their defined contribution allocations.
This kind of combined plan design requires careful coordination between your retirement fiduciary, your CPA, and the third-party administrator managing the actuarial work. But for the right business profile, specifically an owner in their late 40s or 50s who wants to compress decades of savings into a shorter window before retirement, the numbers can be extraordinary.
Choosing the Right Structure for Your Business in Phoenix
Every business is different, and the right retirement plan design depends on a combination of factors: the number of employees, the age and compensation spread across the workforce, the owner’s personal retirement timeline, the business’s cash flow profile, and the level of administrative complexity the owner is willing to manage.
For a sole proprietor or a business with few employees, a simple Safe Harbor 401(k) with a profit-sharing component may capture most of the available tax advantage without unnecessary complexity. For a larger operation with a younger staff and a senior ownership team, a Cross-Tested Profit Sharing design layered onto a Safe Harbor 401(k) foundation could unlock substantially higher owner-directed contributions. And for a high-earning owner approaching retirement with strong and consistent cash flow, adding a cash balance layer to that structure could be the most effective retirement savings decision they ever make.
Working with a qualified retirement fiduciary who understands the nuances of plan design, nondiscrimination testing, and the specific regulatory environment for business retirement plans is not optional if you want to get the most out of these strategies. The complexity is manageable, but it requires expertise and ongoing attention.
Phoenix-area business owners have access to plan consultants and third-party administrators who specialize in exactly these kinds of customized defined contribution plans. Taking the time to evaluate your current plan design against the alternatives is an investment that can pay dividends for decades.
Conclusion
The standard 401(k) is a starting point, not a finish line. For business owners who want to maximize retirement savings, exercise meaningful control over how contributions are allocated, and build a plan that reflects their specific workforce and goals, the tools exist to do far better. From Cross-Tested Profit Sharing to Safe Harbor 401(k) designs to layered defined benefit strategies, the path to a more powerful business retirement plan begins with asking better questions and working with the right professionals to answer them.
Need Pension Consulting & Pension Plans in Phoenix, AZ?
Fiduciary Advisors, Ltd. is a business-to-business associated pension administrator based in Phoenix, Arizona, since 1990. We specialize in designing and planning employee retirement programs, pensions, profit sharing, and are third-party administrators for 401K for small- to medium-size businesses. We conduct enrollment meetings, prepare detailed actuarial calculations, cash-balance plans, and financial consultation for all businesses. Give us a call today for more information!