What Is a Funded Pension Plan and How Does It Work?

A funded pension plan is an employer-sponsored retirement arrangement in which the employer, and sometimes employees, put money into a separate trust today so the assets are invested and waiting when benefits come due later. The word “funded” is doing real work here: the money is set aside now rather than paid out of the company’s future cash flow, and federal law requires private-sector plans to keep enough in the trust to cover what has been promised. A federal insurance program stands behind those promises if the plan later fails.

Most conversations about funded pension plans are really about defined benefit plans, where the employer promises a specific monthly amount at retirement based on your salary and years of service. That promise is what needs funding. A defined contribution plan, by contrast, only guarantees the contribution, so the funding question barely applies. The rules below track defined benefit plans.

How the Money Gets Set Aside

Employer contributions go into a dedicated trust that is legally separate from the company’s operating accounts. If the business hits trouble, creditors generally cannot reach the trust. Some plans also require employees to contribute a percentage of pay, which adds to the pool.

Once the money is in the trust, fiduciaries manage it. Under ERISA, anyone handling plan assets must act solely in the interest of participants and beneficiaries and exercise the care a knowledgeable person in a similar role would use.¹ Self-dealing is out. Steering the fund into investments that help the company at participants’ expense is out. Federal law also prohibits specific transactions between the plan and related parties, including sales, loans, or leases between the trust and the employer or its officers.²

Fiduciaries diversify holdings across domestic and international stocks, corporate and government bonds, and sometimes real estate or private equity. Diversification isn’t optional; ERISA requires it to minimize the risk of large losses.¹ Contributions alone rarely cover the full cost of future benefits, so investment returns do a lot of the work. Actuaries bake an expected return into their models, often around 6.5 to 7 percent over the long term. When actual returns lag, the employer has to put more in. When they beat expectations, required contributions drop.

Whether a Plan Is Well-Funded

The core measure of a plan’s health is the funding ratio: current asset value divided by total projected liabilities. A ratio of 100 percent means assets are on track to cover every promised dollar. Below that, the plan has an unfunded liability. Above it, a surplus.

Calculating the liability side is the actuary’s job. Assumptions about life expectancy, retirement age, salary growth, and investment returns all feed the number, and small changes matter. Update mortality tables to reflect longer lives and the liability grows. Cut the assumed return by half a percentage point and the present value of future obligations rises.

A ratio by itself doesn’t tell the whole story. A plan at 95 percent with a young workforce and a healthy sponsor is in far better shape than one at 95 percent with most participants already drawing benefits and an employer struggling to contribute. Treat the funding ratio as a starting point.

When the Benefit Becomes Yours

You don’t own your full pension the day you start. Employers can require a waiting period before you participate, but they cannot keep you out once you turn 21 and complete the required service.³

Even after you’re in, vesting decides how much of the employer-funded benefit you actually keep if you leave. Defined benefit plans use one of two schedules:

Cliff vesting takes you from 0 percent to 100 percent after five years of service. Leave before then and you forfeit the employer-funded piece entirely.
Graded vesting phases you in over seven years, with your vested percentage rising each year until you reach 100 percent.

Any contributions from your own paycheck are always 100 percent yours immediately. If you leave at 40 percent vested, you keep 40 percent of the accrued employer benefit and forfeit the rest.

Federal Funding Rules and What Happens When Employers Fall Short

ERISA sets the legal framework for how private-sector pension plans must be funded and managed.⁴ Every year, single-employer defined benefit plans must contribute at least the minimum required amount under federal funding rules, which reflects the cost of benefits earned that year plus adjustments for any existing shortfall.⁵

Miss that minimum and the IRS imposes a 10 percent excise tax on the unpaid amount. If the shortfall still isn’t cured by the end of the taxable period, the penalty jumps to 100 percent of the deficiency.⁶ The Treasury Secretary can waive the minimum standard in cases of genuine business hardship, but only for up to three of any 15 consecutive plan years, and waivers are rare.⁵

How to Check Your Plan’s Health

Employers file a Form 5500 annually with the Department of Labor, reporting the plan’s financial condition, investments, and operations. Single-employer defined benefit plans attach a Schedule SB with detailed actuarial information, and the filings are publicly accessible.⁷

For most participants, the more useful document is the Annual Funding Notice required under ERISA Section 101(f). It shows the plan’s funded percentage for the current year and the two before it, the number of people covered, and information about PBGC insurance protection.⁸ Read it every year.

New participants must also receive a Summary Plan Description within 90 days of joining. The SPD spells out eligibility, benefit formulas, vesting, claims procedures, and your ERISA rights. If the plan’s terms change materially, you’re entitled to a Summary of Material Modifications within 210 days after the close of the plan year in which the change was made.⁹

What You Actually Receive at Retirement

Most defined benefit plans pay the benefit as a monthly annuity. The two primary forms are the single-life annuity, which pays a higher monthly amount for your lifetime and stops at your death, and the joint-and-survivor annuity, which pays a lower amount while both you and your spouse are alive and then continues at a reduced level (typically 50 to 100 percent) to your surviving spouse.

Federal law requires plans to offer the joint-and-survivor annuity as the default for married participants. Choosing anything else, including a single-life annuity or a lump sum, requires your spouse’s written consent.¹⁰

Some plans allow a lump sum. If you take one and it isn’t rolled directly into an IRA or another employer plan, the payer must withhold 20 percent for federal income taxes, even if you plan to complete a 60-day rollover yourself. A direct rollover avoids the withholding.¹¹

Pension income is taxed as ordinary income in the year you receive it.¹² Taking a distribution before age 59½ generally triggers an extra 10 percent penalty on the taxable portion, with exceptions for separation from service at age 55 or later, disability, distributions under a qualified domestic relations order, and several other narrowly defined situations.¹³

You can’t defer forever, either. Required minimum distributions generally have to begin by the year you reach age 73, with the age scheduled to rise to 75 in 2033 under SECURE 2.0.¹⁴

The PBGC Backstop

Well-managed plans still fail sometimes, usually because the sponsoring company does. The Pension Benefit Guaranty Corporation is the federal safety net for private-sector defined benefit plans, funded by insurance premiums, investment income, and assets recovered from failed plans rather than tax dollars.¹⁵

When a plan terminates without enough assets, the PBGC takes over as trustee and pays benefits up to a legal maximum. For 2026, the ceiling for a 65-year-old retiree receiving a straight-life annuity is $7,789.77 per month, roughly $93,477 per year. For a joint-and-50-percent-survivor annuity at the same age, the cap is $7,010.79 per month.¹⁶ Most retirees receive amounts well below these limits, so PBGC coverage is enough for the vast majority. Highly compensated executives with generous formulas can end up above the ceiling and take a haircut if a plan fails.

If Your Employer Freezes the Plan

Employers can freeze a pension. A hard freeze stops all future accruals for every participant. A soft freeze closes the plan to new employees while letting existing participants keep accruing. Either way, benefits you’ve already earned are safe: the employer still owes them and must keep funding the plan to meet those obligations.

Freezes have become common as employers shift toward defined contribution plans. If yours is frozen, check the Annual Funding Notice to confirm the plan remains adequately funded, and read the freeze notice carefully. Some frozen plans calculate the final benefit using your salary at the freeze date rather than your salary at retirement, which can matter over a decade or more of inflation.

Divorce and Pension Division

Pension benefits earned during a marriage are often one of the largest assets to divide. Splitting a pension takes a Qualified Domestic Relations Order, or QDRO: a court order directing the plan to pay a portion of benefits to a former spouse, child, or other dependent.¹⁷

Without a QDRO, plans cannot pay anyone other than the participant. ERISA’s anti-assignment rules exist to protect retirement savings, and the QDRO is the recognized exception. The order must identify the participant and alternate payee by name, name each plan it applies to, and specify the dollar amount or percentage the alternate payee will receive.¹⁷ Handling this during the divorce is far easier than trying to fix it years later, and pension benefits get overlooked in settlements more often than they should.

1
Office of the Law Revision Counsel. 29 U.S. Code 1104 – Fiduciary Duties
2
U.S. Department of Labor. ERISA Fiduciary Advisor
3
Internal Revenue Service. Retirement Topics – Significant Ages for Retirement Plan Participants
4
U.S. Department of Labor. Employee Retirement Income Security Act (ERISA)
5
Office of the Law Revision Counsel. 29 U.S. Code 1082 – Minimum Funding Standards
6
eCFR. 26 CFR 54.4971(c)-1 – Taxes on Failure to Meet Minimum Funding Standards
7
U.S. Department of Labor. Form 5500 Series
8
U.S. Department of Labor. Single-Employer Pension Plan Model Annual Funding Notice
9
Internal Revenue Service. 401(k) Resource Guide – Plan Participants – Summary Plan Description
10
Internal Revenue Service. Fixing Common Plan Mistakes – Failure to Obtain Spousal Consent
11
Internal Revenue Service. Rollovers of Retirement Plan and IRA Distributions
12
Internal Revenue Service. Topic No. 410 – Pensions and Annuities
13
Office of the Law Revision Counsel. 26 U.S. Code 72 – Annuities; Certain Proceeds of Endowment and Life Insurance Contracts
14
Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs
15
Pension Benefit Guaranty Corporation. How We Operate
16
Pension Benefit Guaranty Corporation. Maximum Monthly Guarantee Tables
17
U.S. Department of Labor. Qualified Domestic Relations Orders – An Overview