Profit Sharing Plan for Small Business 2026: Cross-Tested and Age-Weighted Designs

A profit sharing plan is one of the most flexible retirement plan designs available to small businesses — contributions are discretionary, the formula can legally favor older owners over younger employees, and the maximum contribution can reach $72,000 per owner in 2026. Here's how the allocation formulas work, where the limits apply, and when profit sharing beats a SEP IRA or SIMPLE IRA.

What a profit sharing plan is — and what it isn't

A profit sharing plan is a type of defined contribution plan under IRC §401(a) in which the employer makes discretionary contributions to participant accounts. Unlike a 401(k) with employee salary deferrals, a profit sharing plan is funded entirely by the employer. Unlike a pension or cash balance plan, there is no promised benefit — contributions go into individual accounts and grow based on investment performance.

Despite the name, the plan doesn't require the business to have profits. The IRS uses "profit sharing" as a category label; the employer can contribute in any year, regardless of profitability, as long as the contribution doesn't exceed the deduction limits.

Most small-business owners combine a profit sharing plan with a 401(k) plan — they're often part of the same plan document. The 401(k) portion handles employee deferrals; the profit sharing portion handles employer contributions. This combination allows an owner who defers $24,500 in salary to also receive employer profit sharing contributions up to $47,500, reaching the $72,000 §415(c) annual additions limit.

Two allocation formulas: pro-rata and cross-tested

Pro-rata (flat percentage)

The simplest design: every eligible employee receives the same percentage of compensation. If the employer contributes 15%, a participant with $100,000 of compensation gets $15,000 and a participant with $50,000 gets $7,500.

Pro-rata designs pass IRS nondiscrimination testing automatically. The trade-off is that the formula is blind to age — a 32-year-old employee and a 57-year-old owner receive exactly the same percentage. For an owner trying to maximize their own retirement savings with limited years left before retirement, this wastes employer dollars on younger employees.

Cross-tested / age-weighted (new comparability)

A cross-tested design converts each participant's contribution to an equivalent benefit accrual rate (EBAR) and tests nondiscrimination on the projected benefit, not the contribution dollar amount. Because an older participant has fewer years for contributions to compound before retirement, the same projected benefit at retirement requires a larger contribution today.

In practice: a plan can legally give the owner (age 55) a 25% allocation while giving employees (age 30–38) only 5% of compensation — because on a projected-benefit basis, the employer is treating everyone "equally" at retirement age. The younger employees have 30+ years for that 5% to compound; the 57-year-old owner has only 8 years for their allocation to grow.

This is a legitimate IRS-approved design. It requires a third-party administrator (TPA) to run annual cross-testing and nondiscrimination compliance, but for owners in their 50s who want to maximize tax-deferred savings in a compressed window, the math typically justifies the cost.

2026 contribution limits

Key interaction: When a profit sharing plan is combined with a 401(k) plan, employee deferrals do not reduce the employer's 25% deduction capacity. Under §404(a)(7), the employer can deduct profit sharing contributions equal to 25% of eligible compensation plus any 401(k) salary deferrals. The deferrals are deductible on their own; they don't crowd out the profit sharing deduction.

Worked example: cross-tested design in action

Business: S-corp, owner-employee age 55 with W-2 salary of $280,000 and two employees.

The cross-tested design costs $15,000 more in total employer contributions — almost entirely from the larger owner allocation. But the owner receives $28,000 more in deductions. At a combined federal + state marginal rate of 42%, that's roughly $11,760 in additional tax savings, net of the extra employee cost ($6,500 in gateway contributions). The owner nets approximately $5,260 after accounting for the additional employee cost — plus the $6,500 in employee contributions remains in the plan growing tax-deferred for the owner's benefit at company level (it's a cost, but a compensation cost, not a permanent loss).

Add in the 401(k) deferral layer: the owner also defers $24,500 in salary (plus $8,000 catch-up at age 55), reaching $24,500 + $70,000 = $94,500 total — but the §415(c) cap is $72,000 on the combination of employer + employee contributions. The owner's profit sharing contribution would need to be $72,000 − $24,500 = $47,500 if they're also making the full deferral. The employer can separately deduct the $24,500 deferral under §404(a)(7), so the combined deductible retirement contribution is $47,500 (profit sharing, deductible under §404(a)(3)(A)) + $24,500 (deferral, deductible separately) = $72,000 total.

The minimum allocation gateway

Cross-tested designs only pass nondiscrimination testing if non-highly-compensated employees (NHCEs) receive a "gateway" minimum contribution. The standard requirement is that every NHCE must receive an allocation of at least 5% of their compensation, or one-third of the highest allocation rate provided to any highly compensated employee (HCE) — whichever is lower.³

If the highest HCE rate is 25% of compensation, one-third is 8.3%. The 5% gateway is lower and thus sets the floor for NHCEs in this scenario.

Employers who are unwilling to fund 5% of compensation for all employees will not be able to use a cross-tested design. For businesses where employee payroll is large relative to owner compensation, this can make cross-testing economically unattractive. The TPA will model the gateway cost before you adopt the design.

Layering profit sharing on top of a safe harbor 401(k)

The most powerful combination for businesses with employees is a safe harbor 401(k) plan — which eliminates ADP/ACP nondiscrimination testing for the deferral portion — with a discretionary cross-tested profit sharing layer on top. The safe harbor contribution (typically 3–4% employer match) satisfies the deferral test; the cross-tested profit sharing contribution can still allocate disproportionate amounts to the owner, subject to the gateway test on the combined allocation.

One subtlety: if the plan already has a safe harbor employer contribution, that counts toward each participant's allocation rate for gateway purposes. An employee receiving a 3% safe harbor match already has 3% from the employer; a 2% discretionary profit sharing contribution on top brings them to 5% and satisfies the gateway. This can make the cross-tested layer cheaper than it looks at first.

See the safe harbor 401(k) guide for the underlying plan design before adding a profit sharing layer.

Profit sharing vs. other plans for small businesses

When profit sharing makes sense

You have employees and can't use a SEP IRA effectively. SEP IRA requires the same percentage contribution for every eligible employee. If you have four employees and want to save 20% of your own compensation, you must also contribute 20% for each employee. A profit sharing plan with a cross-tested design lets you contribute 20–25% for yourself while contributing only 5% for employees — dramatically reducing the employee cost.

You want contributions to be discretionary. A cash balance plan requires actuarially determined minimum contributions each year. A profit sharing plan requires nothing — you can contribute $72,000 in a good year and $0 in a bad year. This flexibility suits businesses with volatile revenue.

You want to stay in defined contribution territory but exceed SEP limits on a favorable basis. SEP IRA requires equal rates. A profit sharing plan achieves the same $72,000 ceiling but concentrates the deduction on the owner rather than spreading it pro-rata across employees.

You're building toward a cash balance stack. Many owners in their early-to-mid 50s start with a cross-tested profit sharing + 401(k) plan (deducting $72,000/year), then add a cash balance plan when contributions need to escalate past $100,000. The profit sharing plan establishes the compliance infrastructure (TPA, IRS Form 5500 filing) before the more complex defined benefit layer is added.

The owner is age 40–62. Cross-testing is most powerful when the age gap between the owner and average employee is large. A 55-year-old owner with employees in their late 20s can typically achieve owner allocation rates 4–6× the employee rate while satisfying the gateway test. A 35-year-old owner with 45-year-old employees gets a much smaller benefit from age-weighting.

What to watch out for

Controlled group rules. If you own multiple businesses, all commonly-controlled entities are treated as a single employer for retirement plan purposes. Employees at a sister LLC must be covered in the plan even if you intended the profit sharing plan for only one entity. A fee-only advisor who understands controlled group attribution rules (§§414(b), (c), (m)) is essential before establishing the plan.

Contribution timing. Unlike a SEP IRA (which can be funded up to the tax-filing deadline including extensions), a profit sharing plan contribution is deductible for the tax year as long as it's made before the employer's tax-filing deadline, including extensions. S-corp owners have until March 15 (or September 15 with extension). That's generally enough time, but don't miss the deadline — late contributions are not deductible until the following year.

Form 5500. Plans with assets exceeding $250,000 must file Form 5500 annually with the DOL. This is typically handled by the TPA. Plans with fewer than 100 participants and under $250,000 in assets may qualify for a simplified 5500-EZ or SF filing.