What Salary Supports a Defined Benefit Plan in an S-Corp? (w/Examples) + FAQs

Quick Answer: For tax year 2025, an S-corp owner generally needs W-2 wages of about $280,000 to fund the largest possible defined benefit (DB) plan, because the maximum yearly benefit is capped at the lesser of $280,000 or your average pay in your three highest years. Smaller plans need less salary.

This article reflects federal rules as of June 2026 and covers tax years 2025 and 2026. State rules are noted where they differ. Tax law changes — confirm current figures before you file.

If you run an S corporation and want a big retirement deduction, the number that matters most is not your profit or your distributions. It is the W-2 salary you pay yourself. A defined benefit plan funds off that wage, so a salary set too low quietly shrinks the contribution you can deduct, and you can lose tens of thousands of dollars in tax savings without ever seeing a warning.

The stakes are real and the timing is tight. Roughly 85% of cash balance plans are sponsored by small businesses and professional firms, and these owners often contribute $150,000 to $300,000 or more each year. Set your salary wrong before year-end and the plan’s actuary cannot give you back the room you missed.

• 💰 The exact W-2 salary that supports a maximum DB plan for tax years 2025 and 2026.
• 🧮 Worked examples by age showing how much you can fund at 45, 55, and 60.
• 🚫 Why S-corp distributions and K-1 income are worthless for funding a plan.
• 📋 The forms, deadlines, and costs to set up and run the plan correctly.
• ⚠️ The seven salary mistakes that shrink your deduction or trigger an IRS problem.

Why W-2 Salary Is the Only Number That Counts

A defined benefit plan promises you a set retirement benefit, and an actuary works backward to find the contribution needed to fund that promise. The single input that drives everything is your plan compensation. For an S-corp shareholder-employee, plan compensation means your W-2 wages — the amount in Box 1 (and Box 5) of your W-2 — not your business profit, not your distributions, and not the income on your K-1.

This is not a preference; it is the rule. The IRS confirms that benefits for S-corp owners are based solely on W-2 income, and S-corp distributions cannot be counted for pension purposes. The consequence is blunt: if you take a $40,000 salary and $300,000 in distributions, your plan can only “see” the $40,000. Your maximum contribution collapses to a fraction of what your cash flow could support.

Here is the pattern that trips owners up. You cannot fund a large DB plan on distributions because Section 404 of the tax code ties the deduction to compensation for personal services actually rendered, and the consequence is that money you pulled out as a distribution simply does not build any retirement benefit. A common misconception is that “total business income” funds the plan. It does not. Only payroll does.

What you should do: before December 31, ask your actuary or third-party administrator (TPA) what W-2 salary your target contribution requires, then run that payroll before year-end. Salary set after the year closes cannot be backdated.

Plan Compensation vs. Reasonable Compensation

Two salary rules collide in an S-corp, and you must satisfy both. The first is the reasonable compensation rule: the IRS requires S-corp shareholder-employees to pay themselves reasonable wages for their services before taking distributions. Pay too little and the IRS can reclassify distributions as wages, adding payroll tax plus penalties and interest.

The second is the plan compensation rule: your DB contribution is limited by that same W-2 wage. So in a DB-plan year, the usual S-corp game of minimizing salary works against you. A low salary that looks great for payroll-tax savings can choke off a six-figure deduction. The fix is to find the salary that is both defensible as reasonable and high enough to support your funding target — often the same number for a high-earning professional.

The 415(b) Benefit Limit and the 401(a)(17) Pay Cap

Two ceilings shape the math. The first is the Section 415(b) annual benefit limit, which caps the yearly pension a DB plan can promise at the lesser of $280,000 (for 2025) or 100% of your average pay in your highest three consecutive years. This is why the magic salary lands near $280,000: to promise the maximum benefit, your three-year average pay must reach that level.

The second is the Section 401(a)(17) compensation cap, which limits the pay any qualified plan can count to $350,000 for 2025 and $360,000 for 2026. Pay above the cap is ignored. The consequence of misreading these limits is funding a benefit you are not allowed to keep, which forces a refund of the excess and a possible excise tax. What to do: let a licensed actuary set the numbers, since the three-year-average rule has nuances most software skips.

How Much Salary You Actually Need

The salary you need depends on the size of the contribution you want, which in turn depends on your age. The closer you are to retirement age, the fewer years remain to fund the same promised benefit, so the yearly contribution — and the salary required to support it — rises sharply.

For a maximum DB plan with no other employees, plan to take W-2 wages of about $280,000 to $290,000 for 2025. As one actuarial firm notes, a business owner should generally take W-2 income of at least $275,000 to achieve a maximum plan benefit while keeping employee costs low. If your goal is a smaller, comfortable contribution, your actuary can design the plan around a lower salary that still hits your target.

Below are approximate maximum cash balance (a hybrid DB plan) contributions by age for 2025, assuming W-2 pay at or above the relevant cap and a normal retirement age near 62–65. Use these to reverse-engineer the salary you must run.

Owner’s age (year-end)	Approx. max cash balance contribution (2025)
40	~$124,000
45	~$159,000–$185,000
50	~$204,000–$230,000
55	~$262,000–$290,000
60	~$300,000–$336,000
65	~$349,000–$360,000

These ranges track published cash balance limits by age and admin316 contribution tables, and the exact figure always comes from your plan’s actuary.

Worked Example: The Salary-to-Contribution Math

Say Dr. Patel, age 55, runs an S-corp with $400,000 of net profit and no employees. She wants to contribute the maximum to a cash balance plan, roughly $262,000 for 2025. To support that, her actuary sets her W-2 salary at $290,000, which clears the three-year-average requirement under 415(b) and stays within the $350,000 pay cap.

Here is the flow. The S-corp pays Dr. Patel $290,000 in W-2 wages. The corporation then contributes about $262,000 to the cash balance plan and deducts it. That deduction passes through to her personal return, cutting taxable income. At a combined 37% federal bracket, a $262,000 deduction saves roughly $96,940 in federal income tax for 2025 — money that now grows tax-deferred instead of going to the IRS.

Which Situation Applies to You?

The right salary and plan design depend on your facts. Find your row and read the section it points to.

• Solo owner, no employees, age 50+, want the biggest deduction: Aim for W-2 pay near $280,000–$290,000 and a cash balance plan stacked on a solo 401(k). See the combo section below.
• Solo owner, under 45, want a moderate deduction: A smaller DB or cash balance plan funded on $150,000–$200,000 of salary may be plenty; your age limits the maximum anyway.
• Owner with non-owner employees: You must fund meaningful benefits for staff too, so the cost-benefit shifts. Get an actuarial illustration before committing.
• Owner with uneven income year to year: A traditional DB plan’s required contribution can strain a bad year; a cash balance plan offers more flexible ranges. Discuss with your TPA.

Stacking a 401(k) on Top of the DB Plan

Most owners do not stop at the DB plan. They pair it with a solo 401(k) to add even more deduction. When a DB plan and a defined contribution plan overlap, the Section 404(a)(7) combined limit can apply, but there is a key carve-out: if employer (profit-sharing) contributions to the DC plan do not exceed 6% of compensation, the combined deduction limit does not apply to those amounts.

In practice, this means an owner can usually make the full 401(k) employee deferral plus a 6%-of-pay profit-sharing contribution and fund the DB plan, all deductible. The consequence of ignoring the 6% rule is a lost deduction on the excess profit-sharing dollars, which carry forward instead of helping this year. What to do: have your TPA coordinate both plans on one design so the 6% line is respected.

Combined plan element (2025)	Effect on your numbers
401(k) employee deferral	Up to $23,500 ($31,000 if age 50+), deductible to you
Profit sharing capped at 6% of pay	Stays outside the 404(a)(7) combined limit
Cash balance / DB contribution	The large, age-driven piece set by the actuary

The full combined cash balance plus 401(k) total can exceed $400,000 for an owner age 60+, all funded off W-2 wages.

Worked Example: The Full Stack at Age 60

Meet Marco, age 60, sole owner of an S-corp with $500,000 profit and no staff. His actuary designs a cash balance plan with a ~$336,000 maximum for 2025. He sets W-2 salary at $290,000 to support it and to clear the 415(b) average-pay test.

On top, Marco defers $31,000 to his solo 401(k) (with the age-50 catch-up) and the company adds a 6% profit-sharing contribution of about $17,400. His total deductible retirement funding lands near $384,400 for the year. At a 37% marginal rate, that is roughly $142,000 in federal tax deferred in a single year — the headline reason high earners use these plans.

Forms, Deadlines, Costs, and Timing

A DB or cash balance plan is a real qualified plan with real paperwork. You must adopt the plan document by your tax-filing deadline (including extensions) for the year you want the deduction, thanks to the SECURE Act’s adoption rule. You can often fund the contribution as late as your extended filing deadline, but the salary must be run during the plan year itself.

Each year the plan files Form 5500 or 5500-SF with the Department of Labor, plus the actuarial Schedule SB. Setup typically runs $2,000–$5,000, and ongoing actuarial and administration fees run roughly $2,000–$5,000 per year. The consequence of a late or missing Form 5500 is steep: IRS and DOL penalties can reach hundreds of dollars per day, though the DOL’s Delinquent Filer program can reduce them if you self-correct.

Mistakes to Avoid

• Setting salary too low: A $60,000 salary caps your DB funding far below your goal, costing tens of thousands in lost deduction.
• Counting distributions as plan pay: Distributions and K-1 income fund nothing, so a plan built on them is underfunded and out of compliance.
• Paying unreasonably low wages: The IRS can reclassify distributions as wages, adding back payroll tax, penalties, and interest.
• Adopting the plan after the deadline: Miss the filing-deadline adoption rule and you lose the entire year’s deduction.
• Ignoring the 6% profit-sharing rule: Exceed it and part of your DC deduction is deferred to a future year instead of counted now.
• Forgetting non-owner employees: Skipping required staff benefits can disqualify the plan and unwind years of deductions.
• Skipping the actuary: DIY DB math almost always misstates the 415(b) average-pay limit, leading to over- or under-funding.

Do’s and Don’ts

• Do confirm your target contribution with an actuary before setting payroll, because the salary must support the math.
• Do run W-2 wages near $280,000–$290,000 if you want the 2025 maximum benefit, since that level clears the average-pay test.
• Do stack a solo 401(k) and a 6% profit-sharing piece, because they add deductible room outside the combined limit.
• Do keep three years of consistent high pay if you want the full benefit, as 415(b) uses your three-year average.
• Do file Form 5500 on time every year to avoid daily penalties.
• Don’t rely on distributions to fund the plan, because only W-2 wages count.
• Don’t set salary in January and forget it, since a mid-year change is often needed to hit the target.
• Don’t assume your state mirrors federal, because conformity varies and affects your state deduction.
• Don’t skip the plan document deadline, because late adoption kills the deduction.
• Don’t over-promise a benefit above the 415(b) cap, because the excess must be refunded.

Pros and Cons

• Pro — huge deductions: Owners can deduct $100,000–$360,000+ a year, far above a 401(k) alone.
• Pro — fast tax-deferred growth: Large sums compound sheltered from current tax.
• Pro — creditor protection: ERISA plans generally shield assets from creditors.
• Pro — flexible cash balance design: Contribution ranges can flex with income.
• Pro — pairs with a 401(k): The combo multiplies the deduction.
• Con — high salary needed: Big contributions require big W-2 wages, raising payroll tax.
• Con — annual costs: Actuarial and admin fees run thousands each year.
• Con — employee cost: Non-owner staff must receive meaningful benefits.
• Con — funding commitment: Traditional DB plans require contributions even in lean years.
• Con — complexity: You need an actuary and a TPA, not just a brokerage account.

Federal vs. State Treatment

Federal law sets the deduction, but your state decides whether to honor it. Most states with an income tax conform to federal rules on qualified-plan deductibility, so the contribution that lowers your federal income also lowers your state income. A handful of states with no personal income tax — such as Florida, Texas, Nevada, Washington, and Wyoming — give no state deduction simply because there is no state income tax to reduce.

Topic	Federal	State
Deduction for DB contribution	Allowed under Section 404, year-anchored	Most income-tax states conform; no-tax states offer none
Pay cap counted	$350,000 (2025), $360,000 (2026)	Generally follows federal in conforming states

The consequence of assuming conformity is a surprise on your state return. What to do: confirm your specific state’s treatment with your CPA before you set the contribution.

What to Do Next

1. Estimate your target contribution using the age table above, then call an actuary or TPA for a formal illustration.
2. Have the actuary tell you the exact W-2 salary your goal requires for the year.
3. Adjust your S-corp payroll before December 31 so the wages land in the plan year.
4. Adopt the plan document by your filing deadline (including extensions).
5. Fund the contribution by your extended deadline and file Form 5500 on time.
6. Bring in a CPA or ERISA attorney if you have employees or uneven income — that is where designs go wrong.

This article is educational and not a substitute for advice from a licensed CPA, actuary, or tax attorney for your specific situation. A plan with employees, multiple owners, or large dollars is complex enough to warrant professional design.

FAQs

What salary do I need for the maximum defined benefit plan in 2025? About $280,000–$290,000 in W-2 wages. The 415(b) limit caps the benefit at the lesser of $280,000 or your three-year average pay, so wages near that level support the maximum for 2025.

Do S-corp distributions count toward funding a DB plan? No. Only W-2 wages count as plan compensation. Distributions and K-1 income build no retirement benefit and cannot be used to fund or deduct a contribution.

How much can a 55-year-old contribute? Roughly $262,000–$290,000 to a cash balance plan for 2025, plus a solo 401(k). The exact figure depends on the actuary’s design and your retirement age.

What is the compensation cap for 2026? $360,000. The Section 401(a)(17) cap rose from $350,000 in 2025 to $360,000 in 2026, so pay above that amount is ignored for plan purposes.

Can I have both a 401(k) and a defined benefit plan? Yes. Owners commonly stack a solo 401(k) on a DB plan. Keeping employer profit sharing at or below 6% of pay avoids the combined deduction limit.

Is the salary subject to payroll tax? Yes. W-2 wages owe Social Security and Medicare tax. Above the Social Security wage base, only the 2.9% Medicare tax (plus 0.9% additional Medicare tax) applies.

When must I set up the plan? By your tax-filing deadline, including extensions. The SECURE Act lets you adopt the plan after year-end, but the qualifying salary must be paid during the plan year.

What form does the plan file each year? Form 5500 (or 5500-SF) with the Department of Labor, plus the actuarial Schedule SB. Late filing can trigger penalties of hundreds of dollars per day.

Does my state let me deduct the contribution? Usually, yes. Most income-tax states conform to federal qualified-plan rules. No-income-tax states offer no deduction because there is no state income tax to reduce.

How much does a DB or cash balance plan cost to run? About $2,000–$5,000 to set up and $2,000–$5,000 per year for actuarial and administration work. The tax savings for high earners usually dwarf these fees.

What happens if my salary is too low? Your contribution shrinks. A low W-2 wage caps the deductible contribution, and you cannot fix it after year-end because the salary must be run during the plan year.

Can I fund a DB plan if I have employees? Yes, but it costs more. You must provide meaningful benefits to eligible non-owner staff, so request an actuarial illustration to weigh the owner benefit against employee cost.