Defined Benefit Plan Calculator

Calculate required funding for a defined benefit pension plan. See massive tax deduction potential.

By Konstantin Iakovlev · Updated September 2026 · Source: IRS Notice 2025-67 — 2026 retirement plan limits · Methodology

$
% of income

Target Annual Pension

$210,000.00

Required Annual Funding

$121,280.74

Tax Deduction

$121,280.74

Pension Details

Target Annual Pension$210,000.00
Target Monthly Pension$17,500.00
Years to Retirement15 years
Lump Sum Needed at Retirement (paid to age 85 at 5%)$2,617,064.17
Required Annual Funding$121,280.74

Comparison to 401(k)

Defined Benefit Deduction$121,280.74
Defined Contribution Limit (401(k) total, 2026)$72,000.00
Additional Deduction Over a 401(k)$49,280.74
Estimated Tax Savings (37%)$44,873.87

Use the Defined Benefit Plan Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

Business owners and high earners looking to set aside large, tax-deductible sums often turn to a Defined Benefit (DB) pension plan, and this tool estimates the annual contribution such a plan would require. The deductions can run deep enough to cut current taxable income meaningfully, which carries real weight at the 37% top federal rate that applies in 2026. Seeing your likely funding obligation and tax savings ahead of time is central to sound planning.

The estimate works backward from the goal. It first projects the lump-sum benefit you'd need in hand at retirement, then solves for the level annual contribution required to reach it. The calculator values the pension as a level annual payment from your retirement age to age 85 at 5%, then finds the level year-end contribution that grows to that lump sum at 5% by retirement. The benefit is your desired percentage of pay, counting no more than $360,000 of pay (the 2026 limit) and capped at the $290,000 annual benefit limit, which is scaled down when you will have fewer than 10 years in the plan.

Treat the output as an estimate rather than a final figure. An enrolled actuary sets the real contribution using your detailed plan documents and prevailing market conditions, often leaving some room to maneuver. The trap worth naming is treating the commitment lightly: DB plans demand steady annual funding, and missing those obligations invites penalties.

Example: Dr. Emily Chen, a 50-year-old physician, wants to maximize her retirement savings and tax deductions.

  1. 1 Dr. Chen is 50 years old and plans to retire at 65. She aims for a significant retirement benefit to supplement her other savings. Inputs: age 50, retirement at 65, income $250,000 and a desired pension of 60%, a $150,000 annual benefit starting at 65.
  2. 2 Lump sum at 65: $150,000 a year for 20 years (to age 85) at 5% is worth $150,000 × 12.462 = $1,869,333. Funding it with 15 level contributions growing at 5% (factor 21.579) takes $1,869,333 ÷ 21.579 = $86,629 a year.
  3. 3 The contribution is typically tax-deductible, saving about $32,053 a year at the 37% top 2026 rate, and it is $14,629 more than the $72,000 a defined contribution plan allows in total for 2026.
  4. 4 This substantial annual contribution significantly reduces Dr. Chen's current taxable income, providing immediate tax savings while building a robust retirement nest egg. The specific contribution amount can be optimized by an actuary to achieve desired tax deductions and retirement goals, offering flexibility within IRS limits. This example showcases the massive tax deferral and wealth accumulation potential of a Defined Benefit plan.

Source: IRS Notice 2025-67 — 2026 retirement plan limits · Last updated: September 2026

Frequently Asked Questions

What is a defined benefit plan for a small business owner?
A defined benefit plan (cash balance plan) lets high-income business owners contribute $100,000-$300,000+ per year tax-deductibly, far exceeding 401(k) and SEP limits. Contributions are based on age, income, and a target retirement benefit. Ideal for owners over 45 with consistent high income.
How much can I deduct with a defined benefit plan in 2026?
The maximum annual benefit is $290,000 per year at retirement in 2026, scaled down by a tenth for each year short of 10 years in the plan. A 55-year-old who starts a plan and retires at 62 has 7 years, so the limit is about $203,000, and funding even that in 7 years can take more than $300,000 a year, all tax-deductible. The exact amount depends on age, investment assumptions, and actuary calculations.
Can I have a defined benefit plan and a 401(k)?
Yes. Many high-income business owners combine a defined benefit plan with a 401(k) to maximize tax-deductible contributions. Combined contributions can exceed $300,000 per year. This strategy is especially powerful for business owners earning $500,000+ who want to dramatically reduce taxable income.

You might also need

401(k) Calculator 2026 — Retirement Savings & Employer Match

Calculate your 401(k) balance at retirement with employer match and growth projections. Compare Roth vs Traditional. Based on 2026 IRS contribution limits.

Roth IRA Calculator 2026 — Growth, Limits & Tax-Free Income

Calculate Roth IRA growth projections and tax-free withdrawals. Compare to Traditional IRA side by side. Free, instant results with 2026 contribution limits.

Roth Conversion Calculator 2026 — Tax Impact & Break-Even

Calculate the tax impact of converting a Traditional IRA to Roth. See your break-even year and multi-year projections. Free, instant results for 2026 rates.