Business owners regularly evaluate employees, expenses, technology, and growth opportunities. Yet one of the company’s most valuable planning tools often receives little attention after it is established: the employer-sponsored retirement plan(s).
An employer-sponsored retirement plan can help recruit employees, create tax advantages, and convert business success into personal wealth. The challenge is selecting a structure that fits the company today while providing flexibility for tomorrow.
Choosing the Right Starting Point
Employers should evaluate profitability, cash flow consistency, employee demographics, contribution goals, administrative complexity, hiring plans, and owner financial planning targets.
A SEP IRA offers flexible annual employer contributions and relatively simple administration. However, the employer generally contributes the same percentage of compensation for every eligible employee. This can work well for a single-owner business but can become more expensive as the workforce grows.
A SIMPLE IRA allows employees to contribute and requires an employer contribution. It can be practical for smaller employers seeking simplicity, although contribution capacity and plan design flexibility are more limited than with a 401(k).
When a Solo 401(k) Makes Sense
A Solo 401(k) is designed for an owner with no eligible common-law employees other than a spouse. The owner can contribute as both employee and employer, which may create greater savings potential than an IRA-based plan.
Depending on the plan document, it may also provide Roth contributions, profit-sharing, participant loans, and voluntary after-tax contributions. If eligible employees are hired, the plan generally must transition into a traditional employer 401(k).
When a Traditional 401(k) Makes Sense
A traditional 401(k) can serve businesses with a few employees or a substantial workforce. Employers can incorporate matching, profit sharing, Roth contributions, eligibility requirements, and vesting schedules.
These choices allow the plan to support different objectives. An employer may prioritize recruitment, retention, employee participation, owner contributions, or a combination of each. Safe harbor provisions may also simplify certain testing requirements and improve contribution reliability for owners and highly compensated employees.
When More Advanced Plan Designs Make Sense
Some 401(k) plans permit voluntary after-tax contributions and Roth conversions, creating what is commonly called a mega backdoor Roth. This feature requires intentional plan design and remains subject to annual limits, testing, and employee participation.
Consistently profitable businesses may also add a cash balance plan. When paired with a Solo or traditional 401(k), it may allow owners to accelerate retirement savings beyond the capacity of the 401(k) alone. The potential benefit must be weighed against required employee benefits, actuarial work, administration, and ongoing funding commitments.
Do Not Overlook Plan Oversight
Employers should understand who administers the plan, how providers are compensated, how investments are selected, and which fiduciary responsibilities remain with the business.
Effective oversight often requires coordination among the financial advisor, administrator, recordkeeper, actuary, payroll provider, CPA, and attorney. The right partners help manage responsibilities while keeping the plan aligned with the company’s goals.
When Should You Review the Plan?
Review the plan annually and whenever profitability, hiring, ownership, compensation, or retirement objectives change. A thoughtful review can identify excessive costs, outdated investments, participation concerns, and opportunities to improve plan design.
The best retirement plan is not simply the one allowing the largest contribution today. It is the one that continues to support the owner, employees, and future direction of the business.
| Plan | Employee contribution | Employer contribution | Employee deadline | Employer deadline |
| SEP IRA | None through the SEP arrangement | Lesser of 25% of compensation or $72,000 per participant | Not applicable | Business tax return deadline, including extensions |
| SIMPLE IRA | $17,000 | Generally a 3% match or 2% nonelective contribution | Withheld through payroll during 2026 and deposited promptly | Business tax return deadline, including extensions |
| Solo 401(k) | $24,500 | Profit sharing contribution up to the combined $72,000 limit | Election generally completed by December 31, 2026 | Business tax return deadline, including extensions |
| Traditional 401(k) | $24,500 | Match and profit sharing contributions up to the combined $72,000 limit | Contributed through 2026 payroll and deposited promptly | Business tax return deadline, including extensions |
| Cash balance plan | Generally none | Determined actuarially based on age, compensation, and promised benefit | Not applicable | Final funding generally due September 15, 2027, for a calendar year plan |
| Participant age during 2026 | 401(k) catch-up | SIMPLE IRA catch-up |
| Age 50 through 59 | $8,000 | $4,000 |
| Age 60 through 63 | $11,250 | $5,250 |
| Age 64 or older | $8,000 | $4,000 |
