Most Americans Don't Know About This Powerful 401(k) Savings Opportunity

If you are self-employed or run a small business, how well you've prepared for retirement depends not just on how much you have saved but on whether you have used every tool available to you. Most solo 401(k) owners know about the contribution limits. Far fewer know about a tax credit created by the SECURE 2.0 Act that can be worth up to $1,500 over three years, and that may apply to their plan right now.

This is not a deduction. It is a credit, meaning it comes directly off your tax bill rather than simply reducing the income that gets taxed. And unlike the more familiar startup-cost credit, which does not cover solo plans where the owner is the only participant, this one was deliberately designed to reach self-employed plan sponsors.

Here is what it is, who it is for, and what you need to do to claim it.

What this tax credit is and where it came from

The SECURE Act of 2019 expanded retirement plan access for small businesses, and SECURE 2.0, passed in December 2022, added more than 90 new provisions on top of it. One of those provisions created a dedicated tax credit for plan sponsors who add an Eligible Automatic Contribution Arrangement, known as an EACA, to a qualified retirement plan.

Under an EACA, participants are automatically enrolled in the plan at a default contribution rate, typically a percentage of compensation, unless they actively opt out. The intent behind the credit is to reward plan sponsors for removing friction from retirement savings, since automatic enrollment meaningfully increases participation rates.

The credit is worth $500 per year for each of the first three years after the EACA is adopted, for a total potential benefit of $1,500. It is claimed on IRS Form 8881, the Credit for Small Employer Pension Plan Startup Costs and Auto-Enrollment, filed with the sponsoring business's tax return for each qualifying year.

Why solo 401(k) owners are specifically worth mentioning

Most self-employed people already know they are locked out of the startup-cost credit, which covers the administrative expenses of establishing a new retirement plan. That credit is restricted to plans covering at least one employee other than the owner or the owner's spouse, which disqualifies solo plans by definition.

The auto-enrollment credit is different. Its statutory language does not impose that same restriction, and it sits under a separate section of the tax code. Based on the plain language of SECURE 2.0, solo 401(k) sponsors appear eligible for the EACA credit even if they are the only participant in their plan. This makes it a deliberate carve-out, or at minimum a gap in the exclusion, that self-employed plan owners can potentially use where the startup credit explicitly does not apply to them.

That said, there is an important caveat to disclose upfront: The IRS has not yet issued formal guidance specifically confirming whether the auto-enrollment credit was intended to apply to solo 401(k) plans. The plain reading of the statute supports eligibility, and solo 401(k) plan administrators have been offering EACA amendments on that basis. But future IRS guidance or regulations could clarify or change the interpretation. This makes consulting a tax professional before proceeding not just a polite suggestion but a genuine necessity.

The key quirk: It is about the plan language, not actual contributions

One of the most counterintuitive things about this credit is what triggers it. Eligibility hinges on having the EACA language incorporated into your plan documents, not on whether you actually make contributions or whether anyone is being automatically enrolled in a meaningful sense.

For a solo 401(k) owner who is the only participant, the auto-enrollment provision is somewhat nominal — there are no other employees to default-enroll. But the IRS's credit structure rewards the adoption of the EACA feature itself. What matters is that your plan document includes the qualifying EACA provisions and that you file the appropriate forms.

Directed IRA and other solo 401(k) administrators have noted that you can adopt the EACA and claim the credit for 2025 even though formal plan amendment documents will not be finalized until summer 2026, as long as you issue the required participant notice and update your plan before the December 31, 2026 deadline. If you are setting up a new plan, you can start the three-year credit window from the current tax year.

How it is claimed and where the credit goes

The credit flows to the sponsoring business, not to you personally as an individual filer. The mechanics vary slightly depending on your business structure:

For S corporations and partnerships, the credit flows through to owners via Schedule K-1. For sole proprietors, it is claimed on Form 3800, Part III, through the general business credit. In both cases, the underlying claim starts with Form 8881, attached to the business tax return.

This is a non-refundable credit, meaning it can only offset existing tax liability. If your business owes no federal income tax in a given year, the credit produces no benefit for that year. The IRS does not send you a check for the unused portion. 

Whether unused credits can be carried forward to future years depends on general business credit rules and your specific tax situation, which is another reason to work through this with a tax professional rather than making assumptions.

Who this does not apply to

This credit is aimed squarely at self-employed individuals and small business owners who sponsor their own retirement plans. It does not apply to employees who participate in a 401(k) offered by their employer. If your plan is run by someone else, such as a corporate HR department or a payroll provider, you are a participant, not a sponsor, and this credit is not relevant to your tax return.

For employees in an employer plan, the relevant retirement tax tools are still the traditional ones: pre-tax 401(k) contributions, Roth 401(k) contributions if offered, catch-up contributions after 50, and individual IRA contributions. The auto-enrollment credit exists in a different layer of the tax code, one only accessible to those who hold the plan sponsorship role.

The practical steps to explore this

If you have a solo 401(k) or are setting one up, the process to potentially claim this credit has a few clear steps:

First, confirm your plan is eligible and that the EACA language can be added. Most IRS-preapproved solo 401(k) plans can be amended to include EACA provisions, and several major administrators have already released these amendments or are planning to by summer 2026.

Second, ensure the amendment is adopted before the applicable plan year deadline. For the 2026 plan year, that deadline is December 31, 2026.

Third, file IRS Form 8881 with your business tax return for each of the three eligible years, with the Part II section covering the auto-enrollment credit completed accurately.

Fourth, and most importantly given the outstanding IRS guidance question, run all of this through a CPA or tax professional familiar with small business retirement plans before acting on it. The statutory basis is credible. The formal IRS confirmation is still pending.

The bottom line

The SECURE 2.0 auto-enrollment credit is worth up to $1,500 over three years and appears available to solo 401(k) plan sponsors who add an EACA feature to their plan documents, even though the more familiar startup-cost credit explicitly excludes them. It is a credit rather than a deduction, it goes to the sponsoring business, and it only produces value in years with actual tax liability — helping to keep more cash in your wallet.

The most important step before amending your plan or filing Form 8881 is confirming current eligibility and credit amount with a tax professional, since IRS formal guidance on solo 401(k) applicability has not yet been published. If the guidance ultimately confirms eligibility as expected based on the statute's plain language, this credit could effectively make a solo 401(k) retirement plan free to maintain for three years. That is worth a conversation with your accountant well before the December 31, 2026 plan amendment deadline.

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