To calculate profit sharing contributions, divide the employer’s total contribution by the combined eligible compensation of all participating employees, then apply that percentage to each person’s pay under whatever allocation formula your plan document specifies. For 2026, the IRS caps the compensation you can count at $360,000 per employee and limits total annual additions to any one account to $72,000. The formula itself, and the definition of “eligible compensation,” comes from the plan document, and using the wrong one is one of the most common causes of plan disqualification.
Gather Your Inputs First
Every calculation starts with three things: the plan document, the total dollar amount the employer is contributing, and a census of eligible participants with their qualifying earnings for the plan year.
The plan document controls. It defines who qualifies, which allocation formula applies, and what counts as compensation. Some plans use gross wages; others strip out bonuses, overtime, or commissions. Using the wrong definition throws off every number downstream.
The contribution amount is a business decision. It might be a fixed percentage of net income, or a lump sum the board picks each year. Plans are not required to contribute every year, but when they do, the allocation has to follow the written formula and cannot favor highly compensated employees over rank-and-file workers.
The census needs to be complete and accurate. Every employee who met the plan’s participation requirements during the year belongs on it, with their exact qualifying pay. Mistakes here compound through the whole allocation.
Pro-Rata: The Simplest Formula
Pro-rata gives every participant the same percentage of pay. The steps:
- Add up the eligible compensation of all participants.
- Divide the employer’s total contribution by that combined compensation. The result is the contribution rate.
- Multiply each participant’s pay by that rate to get their individual allocation.
Worked example: the employer contributes $75,000. Total eligible payroll across all participants is $1,500,000. The contribution rate is 5%. An employee earning $60,000 gets $3,000. An employee earning $120,000 gets $6,000. Same percentage, different dollars, because pay is different.
Small businesses lean on pro-rata because it’s simple to administer and easy to explain. It offers no way to direct larger contributions toward owners or senior staff, which is where the next two methods come in.
Permitted Disparity (Social Security Integration)
Permitted disparity lets the employer contribute a higher percentage on earnings above the Social Security taxable wage base, which is $184,500 for 2026. The logic is that Social Security itself replaces a smaller share of income for people who earn above the wage base, so a plan is allowed to tilt contributions to partially close that gap.
The formula uses two rates:
- A base contribution percentage, applied to compensation up to the Social Security wage base.
- An excess contribution percentage, applied to compensation above the wage base.
Federal law caps the spread between the two rates at the lesser of the base percentage or 5.7 percentage points. If your base rate is 3%, the excess rate can be at most 6% (3% plus 3%). If the base rate is 8%, the excess rate maxes out at 13.7% (8% plus 5.7%).
The compliance testing that goes with permitted disparity is more involved than a straight pro-rata split, and most sponsors using it hand the calculation to a third-party administrator.
Age-Weighted and New Comparability
Age-weighted plans allocate based on both compensation and age. Older participants receive a larger share because they have fewer years for investments to grow before retirement. The plan converts each person’s contribution into an equivalent projected benefit at retirement age and tests those projected benefits for nondiscrimination. This tends to favor owners who are older than their workforce.
New comparability plans split employees into separate groups, each with its own contribution rate. A common setup gives owners and key executives a 15% or 20% rate while other employees get a lower rate. To pass IRS scrutiny, these plans must clear a minimum allocation gateway: each non-highly compensated employee must receive an allocation of at least one-third the rate given to the highest-paid participant, or at least 5% of their compensation, whichever is less.
Both methods rely on cross-testing, which converts defined contribution allocations into equivalent defined benefit accruals for nondiscrimination purposes. The annual testing is complex enough that professional administration is essentially mandatory.
The 2026 Limits That Cap Your Result
No matter what the formula produces, three federal ceilings can override it.
Compensation cap. Only the first $360,000 of an employee’s annual pay can be used in the allocation formula for 2026. Anything above that is ignored. Whichever formula you’re running, plug in $360,000 for anyone who earns more.
Annual addition limit. Total contributions to a single participant’s account cannot exceed the lesser of 100% of their compensation or $72,000 for 2026. This ceiling covers everything combined: employer profit sharing, employer matching, and employee elective deferrals. If your calculation pushes someone past $72,000, the administrator must reduce the contribution.
Elective deferral limit. If the profit sharing plan includes a 401(k) feature, employees can defer up to $24,500 of their own pay in 2026. Workers age 50 and older can add another $8,000 in catch-up contributions, and those turning 60 through 63 during the year get a higher catch-up of $11,250. These deferrals count against the $72,000 annual addition total.
Contributions that exceed these limits and are not corrected promptly can disqualify the entire plan, stripping its tax-exempt status.
The Employer’s 25% Deduction Ceiling
Even when individual accounts have room under $72,000, the employer faces a separate cap on the deduction. Contributions to a profit sharing plan are deductible only up to 25% of total eligible compensation paid to all plan participants during the tax year. Amounts above that carry forward to future years but are not deductible in the year they’re contributed.
If total eligible compensation across all participants is $400,000, the maximum deductible contribution is $100,000, regardless of company earnings. Contributing more doesn’t violate the plan’s qualification rules, but the excess generates no current tax benefit and may trigger a 10% excise tax on nondeductible contributions.
Top-Heavy Testing Can Override the Formula
A plan is top-heavy when key employees hold more than 60% of total plan assets. Key employees for 2026 include officers earning above $235,000, anyone who owns at least 5% of the business, and 1% owners earning more than $150,000.
When a plan tips top-heavy, the employer must contribute a minimum of 3% of compensation for every non-key employee who participated during the year, even if the company planned to contribute nothing. If the highest contribution rate given to any key employee is below 3%, non-key employees only need to receive that lower rate instead.
Small businesses cross the 60% threshold easily. Two owners and three employees can push a plan top-heavy without anyone noticing until testing at year-end, triggering a mandatory contribution the owner never budgeted for. A preliminary top-heavy test early in the plan year avoids that surprise.
One More Wrinkle: Highly Compensated Employees
Whichever formula you use, the plan has to pass annual nondiscrimination testing to prove it isn’t tilted toward owners and highly compensated employees. For 2026, a highly compensated employee is anyone who earned more than $160,000 during the prior year, or who owns more than 5% of the business. Pro-rata plans usually pass automatically because everyone gets the same rate. Permitted disparity, age-weighted, and new comparability plans require deeper testing, which is why they generally live with a third-party administrator rather than a spreadsheet.
Forfeitures from employees who left before fully vesting can also feed back into the allocation. Depending on what the plan document says, forfeited amounts may be reallocated to remaining participants as additional contributions, used to offset future employer contributions, or applied as qualified nonelective contributions to help the plan pass nondiscrimination testing. Check the document before deciding where forfeitures go in the current year’s math.
Choosing the wrong formula or misapplying it is one of the most common compliance failures. The IRS Employee Plans Compliance Resolution System lets sponsors fix mistakes, but the correction fees and paperwork are far easier to avoid than to work through after the fact.