Age-weighted formulas follow an age-and-compensation-based allocation method. New comparability can target permitted groups separately and then test the resulting allocation.
What the two approaches have in common
Both can produce employer contributions that differ as a percentage of compensation. Age matters because contributions for younger people have more time until retirement. Neither approach changes the annual contribution limits or removes the need to follow the plan document.
The difference is how the allocation is determined. An age-weighted formula applies its stated methodology across participants. New comparability allows the employer to model different amounts for permitted groups, including different owner targets.
Example: two owners want different amounts
| Participant | Age | Compensation | Desired employer contribution |
|---|---|---|---|
| Owner A | 60 | $300,000 | $45,000 |
| Owner B | 48 | $200,000 | $18,000 |
| Three younger employees | 27–36 | $150,000 combined | Determine through design and testing |
An age-weighted formula would calculate each person’s share under the adopted factors. It would not simply use $45,000 and $18,000 because those are the owners’ preferences. A new comparability document with suitable groups lets the provider start with those targets and calculate the employee allocation needed.
The distinction is control over the objective, not a claim that one method always costs less. A complete age-weighted allocation cannot be determined from this abbreviated table without the adopted formula and individual census.
What happens to an older employee?
An age-weighted formula can provide a substantial allocation to an older employee as well as an older owner. In new comparability testing, an older employee can also affect the amount needed to support the proposed design. Age is not a benefit available only to owners.
Ask for an employee-by-employee comparison. A single “owner percentage” headline can conceal a large change for a long-serving staff member.
When to compare both
Compare both if age-based allocation is appealing but the owners have distinct funding goals. Use the same employer budget or the same owner targets, list the required employee contributions, and show any amendment or administrative costs.
Also ask for a sensitivity example: what changes if a younger partner joins or compensation rises? The most attractive first-year result may not be the most useful ongoing design.
Explore the next step
Try the free scenario calculator with hypothetical inputs, or compare more allocation examples. The methodology guide explains what the calculator does and does not test.
Sources & further reading
- Treasury Regulation §1.401(a)(4)-8: cross-testing and the gateway
- Treasury Regulation §1.401(a)(4)-2: contributions and rate groups
- Treasury Regulation §1.401-1: qualified plan requirements
Educational content updated September 18, 2026. Examples are fictional; they illustrate funding choices and do not constitute final testing or plan-specific advice.