Cash Balance Plan Contribution Limits for 2026: How the Plan Works and Who It Suits

Cash balance plan contribution limits have no flat dollar cap. The IRS caps the retirement benefit instead: for 2026 the annual benefit a defined benefit plan can pay is limited to $290,000, and only the first $360,000 of each person's pay can be counted. An actuary works backward from those caps to set the deductible contribution each year, so an owner in their 50s can often put far more away than a 401(k) allows.

This guide explains how cash balance plan contribution limits are worked out in 2026, how pay credits and interest credits build the account, how the plan sits next to a 401(k), and what the filing, PBGC and tax credit rules mean for a small business. A worked example at the end puts numbers on one owner's year.

What a Cash Balance Plan Is

A cash balance plan is a defined benefit pension plan, the same legal category as a traditional pension. The difference is how the promise is stated. The Department of Labor's fact sheet on cash balance pension plans describes a plan that "defines the promised benefit in terms of a stated account balance."

That balance is a bookkeeping figure. The employer holds the money in one pooled trust and invests it, and each participant's account shows what the plan owes that person. Because the plan promises a set rate of growth, the DOL notes that "the investment risks are borne solely by the employer." If the trust earns less than the promised rate, the employer contributes more in later years. If it earns more, later contributions can fall.

How Pay Credits and Interest Credits Work

Every year, each participant's account receives two credits.

The pay credit is the employer contribution written into the plan document. It is usually a percentage of pay or a flat dollar amount, and plans often set different credit levels for owners and staff, subject to the nondiscrimination rules that apply to every qualified plan.

The interest credit is the growth the plan guarantees on the balance. According to the DOL fact sheet, it can be "either a fixed rate or a variable rate that is linked to an index." Treasury regulations cap interest credits at a market rate of return, and under Treas. Reg. §1.411(b)(5)-1 a fixed annual rate of 6 percent is deemed to meet that test.

Benefits vest on a short schedule. The DOL fact sheet says cash balance benefits "must be fully vested after 3 years of service." At retirement or separation, the participant can usually take the balance as a lump sum and roll it into an IRA, and the plan also offers a lifetime annuity.

Cash Balance Plan Contribution Limits in 2026

Since a cash balance plan is a defined benefit plan, its limits apply to the benefit at the end. The 2026 figures come from IRS Notice 2025-67.

Notice 2025-67 states that "the limitation on the annual benefit under a defined benefit plan under section 415(b)(1)(A) of the Code is increased from $280,000 to $290,000" and that the §401(a)(17) compensation limit "is increased from $350,000 to $360,000."

Three points decide how these caps turn into a contribution:

• The benefit cap is the lesser of two numbers. Under §415(b)(1), the annual benefit cannot exceed the dollar limit or 100 percent of the participant's average pay for their highest three years, whichever is lower. Someone whose high-three average pay is $200,000 is capped at $200,000 a year, even though the dollar limit is $290,000.
• The dollar cap shrinks with fewer than 10 years in the plan. Section 415(b)(5) multiplies the dollar limit by years of participation over 10. An owner who joins at 60 and retires at 65 has five years, so the dollar cap on their benefit is $145,000 rather than $290,000.
• Age drives the contribution. The actuary converts the capped benefit into a lump sum at retirement age and spreads the cost over the remaining years. Fewer years to retirement means each year carries a larger share, which is why the largest pay credits go to owners in their 50s and early 60s.

Because the result depends on age, pay, plan design and actuarial assumptions, your actuary should give you a minimum required contribution and a maximum deductible amount each year.

Pairing a Cash Balance Plan With a 401(k)

Many small business cash balance plans run alongside a 401(k) with profit sharing, which keeps its own 2026 limits from the table above.

Two tax rules shape the combination. The first is the combined deduction limit in §404(a)(7) of the Internal Revenue Code. When the same people are covered by a defined benefit plan and a defined contribution plan, total deductible employer contributions are generally capped at the greater of 25 percent of their pay or the defined benefit plan's minimum funding requirement. That limit has two important exceptions:

• Employee elective deferrals do not count toward it. If the only money going into the 401(k) is employee deferrals, the combined limit does not apply.
• Employer contributions to the 401(k) of up to 6 percent of pay are left out. Section 404(a)(7)(C)(iii) says that when employer contributions to the defined contribution plans "do not exceed 6 percent of the compensation," the combined limit does not apply to them. This is why many plan designs hold the profit sharing contribution at 6 percent.

A single-employer plan covered by the PBGC is also left out of the §404(a)(7) calculation entirely, so the combined limit matters most for plans the PBGC does not cover.

The second rule is about timing. Under §404(a)(6), a contribution made after year end but by the due date of the business's tax return, including extensions, is treated as made in the prior year. Owner pay matters too, because the plan formula works from the compensation the plan counts. Our guides on reasonable compensation for S corp owners and how much a CPA firm owner should pay themselves cover how to set that salary.

Older participants also get larger 401(k) catch-ups in 2026, and higher earners face the Roth catch-up rule. The SECURE 2.0 Act guide summarizes those changes, and our explainer on the $150,000 wage test for mandatory Roth catch-ups covers the payroll side.

Worked Example: One Owner's 2026 Contributions

Dana is 55 and the sole owner of an S corporation consulting firm. She paid herself more than $150,000 in W-2 wages in 2025 and pays herself $400,000 in 2026. Her firm sponsors a 401(k) with profit sharing and a new cash balance plan. The plan design gives her a pay credit of $150,000 a year and a fixed interest credit of 5 percent. These figures are illustrative; her actuary sets the actual pay credit within the §415(b) limits.

Only $360,000 of her $400,000 can be counted under §401(a)(17).

The 401(k) annual additions are $46,100 ($24,500 plus $21,600), within the $72,000 §415(c) limit, and catch-ups do not count toward that limit. Her 2025 wages were above the $150,000 Roth catch-up wage threshold in Notice 2025-67, so her catch-up must be made as a Roth contribution. The profit sharing contribution equals exactly 6 percent of counted pay, so the §404(a)(7) combined limit does not reduce the deduction. The pay credit equals 41.7 percent of her counted pay.

Here is how her cash balance account grows if the plan stays in place for 10 years, with interest credited on the opening balance and the pay credit added at year end:

Over 10 years, pay credits total $1,500,000 and interest credits add $386,684. Each year the actuary also checks that Dana's projected benefit stays under the §415(b) cap, which for her is the lesser of $290,000 or her high-three average counted pay. From age 60 to 63 her catch-up rises to $11,250 under current law.

Who a Cash Balance Plan Suits

A cash balance plan works best for owners and partners with high, steady income who already contribute the most a 401(k) allows. Typical candidates include physicians, dentists, lawyers, accountants and consultants in their late 40s or older, and partnerships where several senior partners want to save more. Our page on CPA retirement planning covers how this fits a wider retirement plan, and our medical practice accounting services page covers the books behind practices that often sponsor these plans.

The plan is a weaker fit when profits swing widely from year to year. A defined benefit plan has minimum funding requirements, so the firm must contribute at least the required amount even in a lean year. Owners with large staffs must also fund staff pay credits so the plan passes coverage and nondiscrimination tests. If simpler plans meet your savings goal, compare them first: our guides on Roth solo 401(k) contribution limits and SEP IRA vs SIMPLE IRA cover those options.

Form 5500 Filing for a Cash Balance Plan

A cash balance plan generally files an annual return in the Form 5500 series. The IRS Form 5500 Corner lists which version applies:

• Form 5500-EZ is for a one-participant plan, which covers only the owners or partners and their spouses. The Schedule SB, the actuarial schedule for single-employer defined benefit plans, stays in the plan's records and is not attached to Form 5500-EZ. The IRS says a one-participant plan generally must file once it has $250,000 or more in assets at year end, and a plan with fewer assets may be exempt.
• Form 5500-SF is for a plan "with fewer than 100 participants" that meets the other eligibility conditions. Most small plans with staff file this version through EFAST2.
• Form 5500 is the full return for larger plans.

The due date is "the last day of the seventh month after the plan year ends (July 31 for a calendar year plan)." Form 5558 extends that deadline.

PBGC Coverage and Premiums

The Pension Benefit Guaranty Corporation insures most private defined benefit plans, which means it pays guaranteed benefits if an insured plan ends without enough money. The PBGC's coverage page explains that it usually does not insure plans of "professional service employers (such as doctors and lawyers) that have never had more than 25 active participants since the enactment date of ERISA." ERISA §4021(b)(9) also excludes a plan "established and maintained exclusively for substantial owners," which takes most owner-only cash balance plans outside the program.

A covered plan pays annual premiums. For plan years beginning in 2026, the PBGC premium rates page lists a flat-rate premium of $111 per participant for single-employer plans, plus a variable-rate premium of $52 per $1,000 of unfunded vested benefits, capped at $751 per participant.

The Startup Tax Credit for a New Plan

A business that starts a cash balance plan for its employees may qualify for the small employer pension plan startup credit under §45E. The IRS startup costs tax credit page says eligible employers "may be able to claim a tax credit of up to $5,000, for three years, for the ordinary and necessary costs of starting a SEP, SIMPLE IRA or qualified plan." A cash balance plan is a qualified plan.

The main conditions are:

• The business had 100 or fewer employees who earned at least $5,000 in the prior year.
• At least one non-highly compensated employee participates in the plan.
• The credit is 100 percent of eligible startup costs for employers with 50 or fewer such employees and 50 percent for those with 51 to 100. The cap is the greater of $500 or the lesser of $250 per eligible non-highly compensated employee or $5,000.

Two limits catch owners by surprise. An owner-only plan does not qualify, because §45E requires at least one eligible employee who is not highly compensated. And the separate SECURE 2.0 credit for employer contributions, worth up to $1,000 per employee, applies only to defined contribution plans. Section 45E(f) excludes "a defined benefit plan," so pay credits to staff in a cash balance plan do not earn that credit. Employers claim the startup credit on Form 8881.

Frequently Asked Questions

What are the cash balance plan contribution limits for 2026? There is no fixed dollar contribution cap. The limit applies to the benefit: in 2026 the annual benefit cannot exceed $290,000 or 100 percent of the participant's high-three average pay, whichever is lower, and pay above $360,000 is ignored. An actuary converts that cap into a maximum yearly contribution based on age and years to retirement.

Can I have a cash balance plan and a 401(k) at the same time? Yes, and pairing the two is a common design. Employee deferrals of up to $24,500 in 2026, plus catch-ups, sit outside the combined deduction limit, and employer 401(k) contributions of up to 6 percent of pay also stay outside it.

When must cash balance plan contributions be made? To deduct a contribution for a tax year, the business must make it by the due date of that year's tax return, including extensions. The plan's minimum funding rules can set an earlier date for the required portion, so confirm the schedule with your actuary.

Is a cash balance plan insured by the PBGC? Many plans with employees are. Plans covering only substantial owners are excluded, and the PBGC usually does not insure plans of professional service employers that have never had more than 25 active participants. Covered plans pay a 2026 flat-rate premium of $111 per participant.

Next Step

Madras Accountancy supports US CPA firms and the businesses they serve with bookkeeping, tax preparation and accounting work, including recording retirement plan contributions and reflecting them correctly in the books and returns. We work alongside the actuary and plan administrator who design and run the plan. To discuss support for your firm or clients, contact our team.