Defined benefit plans can deliver huge tax deductions. But annual allowable contributions can vary widely from year-to-year.
Too many owners contribute to these plans before an actuary has approved the final contribution amount. Funding these plans funds before actuary sign-off can push you over the maximum allowable amount and create headaches.
Remember a defined benefit plan does not have set annual contribution amounts like a 401(k) or other defined contribution plan. As such, the annual allowable funding amount is always a moving target.
This article explains how to fix an excess contribution. First, we review why the excess happened and why sign-off matters. Then we cover three options:
- Remove it;
- Amend the benefit calculation;
- Keep it in the plan and file form 5330; or
- Carry the excess forward.
Why excess contributions happen?
Defined benefit plan funding is not a “send money whenever” decision. It is an actuarial calculation for a specific plan year. Compensation, investment returns, interest rates and IRS mandates, play a large part of this calculation.
Excess contributions often happen when someone prefunds before getting a funding sign-off. They often assume that they can contribute last year’s amount. But a defined benefit plan does not work like that.
You cannot freely overcontribute and sort it out later. When you contribute early without approval, you create avoidable cleanup work. You also risk losing deductions or triggering penalties.
First rule: wait for administrator sign-off
We always recommend that clients do not make a defined benefit plan contribution until we approve the amount. That includes any “partial” funding or “good faith” prepayments. Waiting is not optional. This process exists to protect you.
We confirm your census, compensation, and plan year details. Then our actuaries calculate the allowed range. When you fund the plan before you have actuary ranges, you force the plan into a correction mode.
Assuming you have the funds currently available, keep it in your business account for now. Earmark it internally as planned funding, but do not transmit it yet.
How we determine whether you overfunded
Your allowable contribution is driven by actuarial funding rules. We calculate the minimum, recommend (or target) and the maximum allowable.
The exact range will vary year to year. Even small compensation changes can move the result. Headcount changes can move it even more. Timing matters as well.
A contribution can be made in 2026 for the 2025 plan year. But it must be treated correctly for deduction purposes. If you contribute beyond what is allowable, we treat that amount as an “excess.” Then you need to choose a correction path based on your situation.
Fix option 1: Remove the excess as soon as possible
The cleanest correction is removing the excess quickly. Do it as soon as you learn the of the excess. Waiting usually makes the cleanup harder.
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As a practical deadline, resolve it no later than the filing date of your tax return. Your investment custodian will have a process for returning funds.
Removing the excess can reduce the risk of a disallowed deduction. It can also prevent compounding errors in later years. If the excess generated earnings, those earnings must be handled properly. Do not guess at the earnings calculation.
Fix option 2: Amend the plan to increase the benefit
Another approach is amending the plan to support a higher contribution. This increases the promised benefit, subject to legal limits. It can convert an “excess” into an allowable amount.
This approach will not work for everyone and is a case by case situation. Plan amendments require formal documentation changes. Amendment fees will apply.
An amendment must be permissible under plan terms and regulatory rules. It must also fit the plan’s design and nondiscrimination requirements. Amending just to use up an excess can be shortsighted.
If you amend to increase your allowable contribution, it will tend to decrease future year contributions (all things being equal). This is because every dollar you contribute to a plan today is one less dollar that you can contribute in the future.
Fix option 3: Keep the funds in the plan and file form 5330
One option is leaving the excess in the plan and treating it as nondeductible. That usually means filing Form 5330, Schedule A, for the section 4972 excise tax.
Is a Cash Balance or Defined Benefit Plan Right For You?
Section 4972 imposes a 10% excise tax on nondeductible employer contributions in the plan. You still cannot deduct the excess amount under section 404 for that year.
For Form 5330, nondeductible contributions generally include the amount over your allowable section 404 deduction. It can also include prior-year nondeductible amounts that stayed in the plan and were not returned. Returning amounts before year-end, or later making them deductible, can reduce the nondeductible balance.
For the 4972 tax, Form 5330 is due the last day of the seventh month after tax year-end. Any tax due must be paid with the filing, even if you request an extension. This approach adds cost and paperwork, so do not fund without our written sign-off next time.
Fix option 4: Apply a 2026 payment toward the 2026 plan year
This is a great option when you made the contribution in the subsequent year, but for the prior year. A common example is contributing in 2026 for the 2025 plan year. If that deposit creates an excess for 2025, you may apply the excess to 2026 instead.
The key rule is that you cannot deduct the excess for 2025. Your CPA must reflect that treatment on the return. You must also remember to communicate this on next year’s funding form.
Remember that it is your responsibility to track your contributions and excess funding from prior years. If not, funding calculations can be wrong.
Key Takeaways
Wait for our written approval before sending any defined benefit plan contribution. Confirm the plan year you are funding. Do not rely on last year’s amount or a rough estimate.
Tell us immediately if you already contributed without approval. Coordinate with your CPA so the deduction matches the approved plan contribution. Keep proof of payment date, amount, and how it was applied. If you overfunded, act fast and pick a correction path.
Remove the excess promptly, amend the plan if appropriate, or carry forward correctly. Going forward, do not prefund your plan without sign-off. That one step prevents most of these problems.
