What’s a safe harbor 401(k) plan?
Plan sponsors who offer a traditional 401(k) plan must perform complex annual nondiscrimination tests to make sure their plan doesn’t favor highly compensated employees (HCEs). Because they’re often a deterrent, these tests led to the creation of the safe harbor 401(k) to encourage more small business owners to establish retirement plans. Safe harbor 401(k)s are exempt from most testing requirements and, therefore, may seem like the obvious solution for your company. Before you decide on your plan design, there are certain safe harbor provisions you need to understand.
[Updated article; original publish date 8/25/21]
Key takeaways
|
Safe harbor 401(k) provisions
The safe harbor 401(k) was created as part of the Small Business Job Protection Act of 1996. In exchange for avoiding nondiscrimination (e.g., actual deferral percentage (ADP)) and top-heavy testing, plan sponsors of safe harbor 401(k) plans have to make mandatory employer contributions and provide an annual written notice to employees. Let’s take a closer look at each of these rules.
Mandatory employer contributions
There are generally three types of contributions you can make to satisfy the safe harbor provisions, and your 401(k) plan document must reflect the option you’ve selected.1 All employer safe harbor contributions are immediately 100% vested, which means the money belongs to the employees and goes with them when they leave your employment, regardless of their years of service.
Safe harbor contribution | Formula | Employee eligibility |
Basic safe harbor match | Match 100% of contributions up to 3% of the employee’s compensation, plus 50% on the next 2% of compensation
Example: employee earns $30,000 and defers 4% of their salary for a total deferral of $1,200
Match = $1,050 $30,000 x 0.03 x 1.00 = $900 $30,000 x 0.01 x 0.50 = $150 | All eligible employees who are contributing to the 401(k) plan |
Enhanced safe harbor match | Match at least 100% of contributions up to 4% of the employee’s compensation, not to exceed 6%
Example: employee earns $30,000 and defers 4% of their salary for a total deferral of $1,200
Match = $1,200 $30,000 x 0.04 x 1.00 = $1,200 | All eligible employees who are contributing to the 401(k) plan |
Nonelective contribution | At least 3% of employees’ compensation
Example: employee earns $30,000 and isn’t contributing to the 401(k) plan
Nonelective contribution = $900 $30,000 x 0.03 = $900 | All eligible employees, including those not contributing to the 401(k) plan (similar to profit-sharing contributions) |
Annual written notice
How much an employee decides to contribute to a 401(k) plan is often influenced by the employer's contribution. Each year, plan sponsors that use either the basic or enhanced match must send employees a notice outlining the safe harbor contribution and their rights to receive it. The notice must be delivered at least 30 days, but no more than 90 days, before the beginning of the plan year. For example, if your plan operates on a calendar year, the notice must be sent no earlier than October 1 and no later than December 1. You can combine your safe harbor notice with other required annual notices, such as an auto-enrollment notice.
The Setting Every Community Up for Retirement Enhancement Act (SECURE Act) of 2019 eliminated the written notice requirement for safe harbor nonelective contributions, which makes sense, as all participants receive this contribution regardless of how much they contribute to the plan.
A traditional 401(k) versus a safe harbor 401(k)
Plan sponsors considering a safe harbor plan should conduct a cost-benefit analysis to determine whether the benefits of not having to perform the nondiscrimination tests outweigh the costs of complying with the safe harbor requirements. This side-by-side comparison of traditional and safe harbor 401(k)s can help you with this assessment.
| Traditional 401(k) | Safe harbor 401(k) |
Deadline to establish a new plan | The business’s tax filing deadline, plus extensions
For example, C corporations generally have until March 15, 2027, to set up a new plan for 2026 | October 1
For example, businesses have until October 1, 2026, to set up a new plan for 2026 |
Eligibility | Plan sponsor can choose age and hours of service, not to exceed age 21 and 1,000 hours | Plan sponsors must have the same requirements for both employer and employee contributions |
2026 employee contribution limits | $24,500, plus $8,000 catch-up contribution for people age 50–59 and 64 or older
| Same |
Employer contributions | Not required | Required (see above) |
Vesting | Flexible, can’t exceed a six-year graded vesting schedule | 100% immediate vesting |
Actual deferral percentage (ADP) test | Required | Generally exempt |
Actual contribution percentage (ACP) test | Required if the plan offers match or after-tax contributions | Generally exempt |
Top-heavy testing | Required | Generally exempt |
Annual participant notices | Not required | Required (see above)
|
Midyear plan changes | Permitted | Limited changes are permitted; participants must be notified 30–90 days before the effective date and be given 30 days to change their deferral election (see IRS Notice 2016-16 and IRS midyear changes to safe harbor 401(k) plans and notices)
|
Converting to a safe harbor 401(k)
What if you already have a traditional 401(k) plan? Can you change it to a safe harbor plan? The short answer is yes. But there are specific deadlines and other requirements you need to be aware of, depending on the type of safe harbor contribution.
- If you want to make a safe harbor matching contribution, the change will be effective on the first day of the following plan year—January 1 for calendar year plans. You must amend your plan document before that date and allow enough time to provide employees with 30 days’ notice.
- You can elect the safe harbor nonelective contribution at any time during the year, as long as the change is made 30 days before the end of the plan year (December 1 for calendar year plans) and the contribution is retroactive for the entire year. If you’re willing to increase the nonelective contribution to 4%, the deadline is extended to the last day of the next plan year (December 31 for calendar year plans). Both options require an amendment to your plan document.
Is a safe harbor 401(k) right for your business?
Low participation by non-highly compensated employees (NHCEs), failed nondiscrimination tests, and easier administration are just a few of the reasons you might consider a safe harbor 401(k) plan instead of a traditional 401(k). Your financial professional and other plan advisors can help you decide if it’s the right solution for your organization.
Learn more about safe harbor plan design.
FAQs
What are the safe harbor contribution options for a 401(k)?
A safe harbor 401(k) generally offers three employer contribution options: a basic match, an enhanced match, or a nonelective contribution. The basic match provides 100% of employee contributions up to 3% of compensation, plus 50% of the next 2% of compensation. An enhanced match must be at least as generous as the basic match. A non-elective contribution requires the employer to contribute at least 3% of compensation for all eligible employees, whether they contribute or not.
Is a safe harbor 401(k) worth it for employers?
Whether a safe harbor 401(k) is worth it depends on an employer’s goals and workforce. The required employer contributions increase plan costs, but many businesses find the tradeoff worthwhile because safe harbor plans generally avoid annual nondiscrimination and top-heavy testing. They can also help highly compensated employees maximize their contributions, reduce administrative challenges, and make the plan more attractive to employees. A cost-benefit analysis can help determine whether it’s the right fit.
What’s the difference between a safe harbor and a traditional 401(k)?
The biggest difference between a safe harbor and a traditional 401(k) is the employer contribution requirement. Traditional 401(k) plans don’t require employer contributions, but they generally must pass annual nondiscrimination and top-heavy testing. Safe harbor plans require employer contributions that are immediately 100% vested and typically are exempt from those tests. Safe harbor plans may also require participant notices and have more restrictions on midyear changes. In exchange, they can offer simpler administration and greater flexibility in contributions for highly compensated employees.
How much must an employer contribute to a safe harbor 401(k)?
The required contribution depends on the selected safe harbor formula. Employers can provide a basic match, an enhanced match, or a non-elective contribution. The basic match equals 100% of employee contributions up to 3% of compensation, plus 50% of the next 2% of compensation. Alternatively, employers can make an enhanced matching contribution or contribute at least 3% of compensation to all eligible employees through a non-elective contribution.
Can a company switch to a safe harbor 401(k) plan?
A company with a traditional 401(k) can switch to a safe harbor plan, but specific rules and deadlines apply. Safe harbor matching contributions generally must be adopted for the next plan year, with enough time to provide required employee notices. Safe harbor nonelective contributions can often be added during the plan year if the employer follows applicable amendment deadlines and contribution requirements.
1 This article doesn't discuss qualified automatic contribution (QACA) safe harbor or QACA nonelective contribution plans.
Retirement plans for small businesses
Are you considering a retirement plan for your small business? Check out our resources on plan types, ERISA, fiduciary duties, and SECURE 2.0.
Important disclosures
Important disclosures
The content of this document is for general information only and is believed to be accurate and reliable as of the posting date, but may be subject to change. It is not intended to provide investment, tax, plan design, or legal advice (unless otherwise indicated). Please consult your own independent advisor as to any investment, tax, or legal statements made herein.
MGR0910265899574
INTENDED FOR PLAN SPONSOR USE