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Minimum funding and contribution limits are different rules. A defined-benefit (DB) plan’s minimum required contribution is an employer-level amount calculated under IRC §§412 and 430 using the plan’s liabilities, assets, actuarial assumptions and statutory amortization charges. A contribution limit is a ceiling on a participant’s annual benefit under IRC §415(b). For 2026, the §415(b) dollar ceiling is $290,000, but that figure does not tell you how much the employer must contribute. A plan can require funding even when no participant is near the $290,000 benefit ceiling, and a plan that satisfies the ceiling can still fail its minimum-funding obligation.
What the two rules control
Minimum funding is a plan-level employer obligation
IRC §412 establishes minimum funding standards for qualified defined-benefit plans. IRC §430 provides the minimum-required-contribution rules for most single-employer DB plans. The calculation asks whether the plan is receiving enough money to support benefits that have already been earned and benefits expected to accrue during the year.
The result is not a universal percentage of payroll or a fixed dollar amount. It is an actuarial calculation performed for the plan’s valuation date. The principal inputs are:
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- the funding target, representing the present value of benefits accrued as of the beginning of the plan year;
- the statutory valuation of plan assets, including adjustments for prefunding and funding-standard carryover balances; and
- applicable shortfall-amortization or waiver-amortization charges.
If adjusted assets are below the funding target, the required contribution generally consists of the target normal cost plus the applicable amortization charges. If adjusted assets meet or exceed the target, the amount can be reduced by the excess, subject to the statutory floor and other requirements. The exact amount must be certified through the plan’s actuarial valuation.
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A contribution limit is a statutory ceiling on a participant’s benefit
IRC §415(b) generally limits a participant’s annual defined-benefit payment to the lesser of 100% of the participant’s high-three-year average compensation or the indexed dollar amount. The IRS announced a $290,000 dollar limit for 2026. This is a limit on the annual benefit payable to an individual, not a formula for determining the employer’s minimum contribution.
The limit is applied when the plan’s benefit is tested under §415(b). It does not replace the plan’s funding valuation, and it does not automatically reduce the employer’s required contribution when the plan has a funding shortfall.
How an IRC §430 minimum required contribution is built
1. Determine the valuation date and plan year
The enrolled actuary establishes the valuation date used to measure liabilities and assets for the plan year. The plan year matters because the normal cost, funding target, interest assumptions and installment schedule are tied to that year. A calendar-year plan, for example, has a different contribution timetable from a plan with a non-calendar plan year.
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Target normal cost is the present value of benefits expected to accrue during the plan year, together with expected plan expenses, reduced by expected mandatory employee contributions. It is therefore sensitive to the plan’s benefit formula, participant census, expected retirement and turnover patterns, compensation assumptions, expenses and required employee payments.
3. Calculate the funding target
The funding target is the present value of benefits accrued or earned as of the beginning of the plan year. It measures the plan’s obligation for benefits already earned, rather than only the benefits expected to accrue during the current year.
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4. Value and adjust plan assets
The statutory asset amount is not simply the balance shown on a brokerage statement. The §430 calculation applies the permitted asset valuation method and adjusts for items such as prefunding balances and funding-standard carryover balances. Those balances can affect how much of the asset base is available to offset the current funding target and normal cost.
5. Add required amortization charges
When statutory conditions are met, shortfall-amortization charges address an underfunding amount over the applicable amortization period. Waiver-amortization charges can also apply when the plan has received a funding waiver that must be repaid through later contributions. The actuary determines which charges apply and how they enter the minimum-required-contribution calculation.
6. Apply the asset-versus-target comparison
The central comparison is between adjusted plan assets and the funding target. A shortfall generally increases the required contribution because the employer must fund the target normal cost and the required amortization charges. Assets at or above the target can reduce the amount, but the statute includes a floor, so a plan cannot assume that an apparent surplus makes the required contribution zero.
7. Use the prescribed actuarial assumptions
Present-value calculations depend on interest-rate assumptions, mortality tables and other assumptions selected under the applicable rules. IRS Notice 2025-40 specifies updated static mortality tables for valuation dates during 2026. Using an outdated table or an assumption that is not permitted for the valuation can change the funding target and normal cost and can make the filing incorrect even if the arithmetic is otherwise accurate.
8. Obtain the actuarial certification and schedule installments
The plan’s enrolled actuary documents the valuation and certifies the minimum required contribution. The employer then schedules the required payments, generally through quarterly installments, rather than waiting until the end of the plan year.
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What the 2026 limits actually mean
| Rule or figure | 2026 amount | What it measures |
|---|---|---|
| IRC §415(b)(1)(A) defined-benefit annual limit | $290,000 | The indexed dollar ceiling on a participant’s annual DB benefit, subject to the alternative high-three-compensation limit. |
| IRC §415(c)(1)(A) defined-contribution annual-additions limit | $72,000 | The annual-additions ceiling for a defined-contribution plan; it is not the DB benefit limit. |
| Qualified-plan compensation limit used in IRS guidance | $360,000 | The compensation cap used for applicable qualified-plan calculations; its effect depends on the specific rule being applied. |
The IRS published these 2026 figures in its 2025 guidance. The $290,000 amount is an annual benefit limit, not a contribution allowance. The $72,000 amount belongs to the defined-contribution rules under §415(c), so substituting it for the DB limit produces the wrong answer. The $360,000 compensation figure is also not a minimum-funding number; it matters only where the particular qualified-plan rule uses the compensation cap.
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Funding and benefit limits operate on different units. Minimum funding measures the plan’s aggregate liabilities and assets. The §415(b) rule measures one participant’s annual payment. A plan with many active employees and retirees can have a substantial funding target even if every participant’s promised annual benefit is well below $290,000.
Conversely, a plan could be well funded while a particular participant’s promised benefit exceeds the §415(b) ceiling. The employer may need to limit or correct that participant’s benefit under the benefit-limit rules, but that correction does not perform the plan’s §430 valuation and does not prove that the minimum contribution was paid.
| Comparison point | Minimum funding under §§412 and 430 | Benefit limit under §415(b) |
|---|---|---|
| What is limited or required? | The employer’s required contribution to the plan. | A participant’s annual defined-benefit payment. |
| Unit of measurement | Plan actuarial liabilities, assets and amortization charges. | Individual annual benefit, high-three compensation and the indexed dollar amount. |
| Primary inputs | Target normal cost, funding target, adjusted assets, assumptions and applicable amortization charges. | High-three-year average compensation and the 2026 indexed amount of $290,000. |
| Timing | Annual valuation with generally quarterly contribution installments. | Testing and correction of the participant’s benefit when the benefit is determined or paid. |
| Typical failure exposure | Interest on late amounts and excise-tax exposure under IRC §4971 for unpaid minimum required contributions. | Benefit limitation or correction issues when the promised annual benefit exceeds the statutory ceiling. |
When minimum contributions are due
Quarterly installments
Required contributions generally are paid in quarterly installments. For a calendar-year plan, the listed installment dates are April 15, July 15, October 15 and January 15 of the following year. The installment calendar does not turn the §415(b) limit into a payment schedule; it applies only to the employer’s minimum-funding obligation.
Late-payment consequences
A late installment can accrue interest. IRS guidance also identifies excise taxes under IRC §4971 for unpaid minimum required contributions. Because the amount due and the penalty exposure depend on the plan’s circumstances and the period of delinquency, an employer should not wait for the next annual valuation to investigate a missed installment.
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What to do after a missed installment
- Notify the plan’s enrolled actuary and benefits counsel immediately.
- Confirm the installment amount, due date, payment date and any interest calculation.
- Determine whether later installments must be adjusted to account for the unpaid amount.
- Review potential IRC §4971 excise-tax reporting and payment obligations.
- Document the correction, including the valuation assumptions and the date funds were deposited.
A practical employer workflow
Before the valuation
- Provide the actuary with a complete participant census, including active employees, retirees, beneficiaries and terminated vested participants.
- Identify the plan year, valuation date, benefit formula, expected expenses and mandatory employee contributions.
- Reconcile trust or custodian asset records with the prior valuation and identify prefunding or funding-standard carryover balances.
- Confirm which mortality tables and other actuarial assumptions apply to the valuation date. For 2026 valuation dates, check the updated static mortality tables specified in IRS Notice 2025-40.
During the valuation
- Calculate target normal cost.
- Calculate the funding target for benefits accrued at the beginning of the year.
- Value and adjust plan assets under the statutory method.
- Identify any shortfall or waiver-amortization charges.
- Apply the statutory floor and determine the minimum required contribution.
- Prepare the actuarial certification and installment schedule.
After the valuation
- Set cash aside before each installment deadline rather than relying on a year-end transfer.
- Track actual contributions separately from the §415(b) benefit testing performed for participants.
- Keep the valuation report, asset reconciliation, contribution confirmations and any correction records together.
- Recalculate promptly after a material change in the participant census, plan amendment or asset information.
Common mistakes and how to correct them
Mistaking the $290,000 figure for the employer contribution
Why it fails: $290,000 is the 2026 annual DB benefit ceiling for a participant, not the amount an employer must deposit. Correction: obtain the §430 valuation and use the certified minimum-required-contribution amount.
Using the defined-contribution limit
Why it fails: The $72,000 2026 figure belongs to §415(c) annual additions for defined-contribution plans. Correction: identify whether the plan is being tested under §415(b) or §415(c) before applying any annual limit.
Looking only at the trust account balance
Why it fails: Statutory assets can include adjustments for prefunding and funding-standard carryover balances, and the valuation must be compared with the funding target under the prescribed method. Correction: reconcile the assets through the actuary’s statutory valuation, not a bank statement alone.
Ignoring the normal cost because the plan has a surplus
Why it fails: The statute includes a floor, and target normal cost reflects benefits expected to accrue during the year. Correction: have the actuary apply the asset credit and statutory floor to determine the actual minimum.
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Using old mortality data for a 2026 valuation
Why it fails: Updated mortality tables can change present values. Correction: confirm that the assumptions comply with the rules applicable to the valuation date, including IRS Notice 2025-40 for 2026 static mortality tables.
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Why it fails: Quarterly installments are generally required, and late amounts can trigger interest and excise-tax exposure. Correction: calendar each installment and escalate any missed date immediately.
When professional actuarial help is necessary
The IRS states that defined-benefit contributions are based on what is needed to provide definitely determinable benefits and that actuarial assumptions and computations are required. Publication 560 (2025) specifically says that determining the amount needed to satisfy the minimum funding standard is complicated and that professional help may be needed.
An enrolled actuary is the appropriate specialist for the §430 valuation, assumption selection, asset adjustments, amortization charges, certification and installment schedule. Benefits counsel or a tax adviser can help with plan amendments, §415(b) corrections, missed installments and IRC §4971 excise-tax questions. Pension-valuation software can organize data and calculations, but it does not eliminate the need for an actuary’s review and certification.
Bottom line for 2026
The minimum contribution for a defined-benefit plan is not a published flat amount. It is the plan-level amount produced by the IRC §430 valuation: target normal cost, the funding target, adjusted plan assets and any required amortization charges, subject to the statutory floor. The 2026 §415(b) figure of $290,000 is a separate participant benefit ceiling. Treat the funding valuation, quarterly installments and benefit-limit testing as separate compliance tasks.
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