Solo 401(k) Vs SEP IRA: Choosing the Right Retirement Plan

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Solo 401(k) Vs SEP IRA: Choosing the Right Retirement Plan
Solo 401k vs SEP IRA: Choosing the Right Retirement Plan | IRAR
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Strategic retirement planning is crucial, especially for small business proprietors, independent contractors, and the self-employed to ensure a comfortable retirement. Just like you manage your business, you are also responsible for saving for retirement.

However, it can be challenging for small business owners to establish a retirement plan. This requires time, the right tools, and most importantly the knowledge to choose the right one.

The economy has presented additional challenges, as many small business owners continue to struggle to retain and motivate employees, which, in turn, hinders both business growth and retirement savings. It’s not surprising that a significant one-third of small business owners lack a retirement savings plan and confidence in retiring by age 65.

In this article, we will explore two popular retirement plans that can be self-directed, individual 401k vs SEP IRA, both tailored for small businesses. We will dive into their distinctive features, and showing you how to get started with minimal overhead.

Comparing The Solo 401k and SEP IRA

Solo 401(k)s and SEP IRAs are popular plans because they are quicker to establish, less expensive, and easier to manage compared to conventional 401(k)s. This makes them a good choice for smaller businesses. To establish any one of these plans, you must have an established business.

While both are tailored for small business owners, these plans exhibit distinct characteristics. Although the IRS regulates both, there are still some differences between them. Let’s get into the key differences of SEP versus 401k to help you decide the optimal retirement savings plan for your needs.

Main Difference Between Solo 401(k) and SEP IRA

Who is it for?

The Solo 401(k) caters to business owners with no full-time employees other than themselves or their spouses.

A SEP IRA suits self-employed individuals and small business owners, of any size with employees.

Generally, eligibility for participation in a SEP IRA is quite inclusive, and even if you have just one employee, you are generally required to include all eligible employees in the plan. An eligible employee is defined as someone who:

  1. Is at least 21 years old.

  2. Has been employed by the same company for at least three of the last five years.

  3. Has received at least $750 in compensation from the employer in the current year, for 2025 and 2024, and $650 in 2021 and 2022.

So, if your employees meet these criteria, they must be included in the SEP IRA plan.

Solo 401k vs. SEP IRA Contributions

SEP IRA Contributions

In a SEP IRA, the contributions are made by an employer. It's important to note that employer contributions made under a SEP plan do not affect the amount you can contribute to an IRA on your own behalf.

Since a SEP IRA is a type of Traditional IRA, you may be able to make regular annual IRA contributions to this account, which eliminates the need to open a separate Traditional IRA.

Thanks to Section 601 of SECURE Act 2.0, starting January 1, 2023, you can now designate your employer profit-sharing contributions as a Roth IRA. However, it's important to note that the IRS guidance on these accounts is still unclear, according to tax professionals and financial advisors. Additionally, custodians are working on updating their agreements to include Roth language, so this option may not be immediately available. Stay tuned for further updates!

When it comes to contributing to a Solo 401(k), the business owner plays two roles: employee and employer. This allows for contributions to be made to the plan in both capacities.

One of the great advantages of this plan is the inclusion of a Roth IRA component, which enables tax-free growth. However, it's important to note that not all providers offer this feature, so it's crucial to thoroughly research the plan's features if this is something you require.

Maximum Contribution Limits

For those under 50, the combined total of employee and employer contributions for Solo 401(k) plans is $69,000 for 2024 and $70,000 for 2025. Additionally, the maximum employee deferral is $23,000 for 2024 and $23,500 for 2025. For those 50 or over, Solo 401(k) plans allow for additional catch-up contributions of $7,500 for 2024 and 2025.

Similarly, SEP IRAs offer high contribution limits compared to other IRA plans, with up to 25% of compensation or $69,000 annually for 2024 and $70,000 for 2025. However, the maximum allowed with a Solo 401(k) plan is even greater because you have the employee contribution.

It's important to note that contributions for any retirement plan are limited to self-employment income, and required minimum distributions kick in at age 73 (starting in 2023), becoming taxable income. Therefore, carefully weighing the pros and cons will help you make an informed decision aligned with your financial goals and circumstances.

Considerations for Solo 401k 

A Solo 401(k) retirement plan is perfect for self-employed individuals or those with a spouse as their only employee. With this option, you have the benefit of higher contribution limits compared to a SEP IRA because you can make contributions as both the employee and employer.

It's important to consider your current and future tax situations when deciding between pre-tax and post-tax contributions to your solo 401(k). A solo 401(k) can be funded with pre- or post-tax dollars. A pre-tax solo 401(k) contribution allows you to reduce your taxable income in the year the contribution is made. You won't pay taxes on the contributed amount until you withdraw it in retirement.

On the other hand, a post-tax Solo 401(k) contribution, also known as a Roth contribution, is made with after-tax dollars. The tax break on this account type isn't immediate. However, with post-tax dollars through a Roth 401(k), your investment earnings and qualified withdrawals in retirement are tax-free.

You can also borrow from your Solo 401(k). If you're inclined to borrow from your Solo 401(k), keep in mind that the maximum loan is the lesser of 50% of your vested balance or $50,000.

To avoid default, make sure to pay back the loan at least quarterly. Note that loan offset can be rolled over, but it is not advisable to borrow from your Designated Roth and After-tax accounts. This option is only available for Solo 401(k) plans, borrowing from a SEP IRA is not permissible.

Solo 401(k)s are also exempt from unrelated debt-financed income (UDFI)

When a self-directed IRA buys real estate using a non-recourse loan or mortgage, it creates UDFI – a type of income that is taxable. With a Solo 401(k) plan, you can use a non-recourse loan without being subject to the UDFI rules. This provides significant tax advantages over an IRA to purchase real estate.

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Considerations for SEP IRA

All eligible employees, including the business owner, must receive the same percentage of employer-funded contributions. Before committing to a SEP IRA, it is important to consider the potential downsides of this retirement account. First, contribution limits are entirely employer-funded.

This means that you, as the employer, must contribute the same percentage to all eligible employees' accounts, including your own. If you have a lot of employees, this can increase quickly and may not be financially feasible.

However, you aren’t required to make contributions every year. For example, if your business is struggling financially, as many small businesses did during the COVID-19 pandemic, you can reduce or even suspend SEP IRA contributions without penalty.

Finally, the SEP IRA does not offer catch-up contributions for those 50 and older.

Can you have a SEP and a 401k?

Maybe. You can have both a SEP IRA and a 401k, but it depends:

  • If you're self-employed and contribute to your own SEP IRA: You generally can't also have a 401k of any type for the same business.
  • If you have a separate employer offering a 401k: You can likely contribute to both your employer's 401k and your own SEP IRA for your small business, with contribution limits applying to each.

You cannot however, have a SEP IRA and Solo 401(k) for your business.

Which Should I Choose?

Choosing between Self-Employed 401k vs. SEP IRA depends on your business, income, and desired retirement savings contributions. The SEP IRA is ideal for those with employees, offering higher contribution limits and tax-deductible contributions than regular IRAs. 

On the other hand, the Solo 401(k) suits those without employees, featuring even higher contribution limits, flexibility in pre-tax or post-tax contributions, and the ability for both employer and employee contributions.

Before deciding, weigh the pros and cons and consult with a financial advisor or tax professional for personalized guidance. 

Schedule a Free Consultation with IRAR Today

Whether you choose a SEP vs Solo 401k, the provider of your retirement plan plays a pivotal role.

IRAR, with nearly 30 years of experience, focuses on helping investors build their retirement wealth by providing alternative investment options with low fees. Reach out for a free consultation to build your dream portfolio and secure a financially free retirement.

We are here to help you. Give us a call at 888-322-6534 or chat with us online to find out how you can build your dream portfolio through alternative investments.

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Solo 401k vs SEP IRA FAQs

What are the main differences between SEP IRA vs 401k for small business? 

The primary difference between a SEP IRA and a 401(k) for small businesses lies in contributions. SEP IRAs are funded solely by employer contributions, while 401(k)s allow contributions from both employers and employees.

Can I have a Solo 401k and a SEP IRA in the same year? 

Generally, you cannot have both a Solo 401(k) and a SEP IRA for the same tax year. However, there are exceptions. If you have a specific type of SEP IRA called a prototype SEP or individual designed SEP, you may be able to maintain both a SEP IRA and a Solo 401(k).

Can I contribute to a SEP and 401k in same year? 

Yes, you can contribute to both a SEP IRA and a 401(k) in the same year. However, there are limitations on the total amount you can contribute to both plans combined. The maximum annual contribution limit for an employer is capped at total contributions made to both the SEP plan and 401(k) plan. 

This limit is called the IRC 415 limit. This amount also may be limited by the maximum deductible amount an employer can contribute which has a maximum of 25% of income. The advantage for the 401(k) plans, however, for individuals who are age 50 and older is the employee catch-up contribution is not limited by the IRC 415 limit. It's essential to consider these limits and consult with a tax professional to ensure you're maximizing your contributions while staying compliant with IRS regulations.

Which Should I Choose: SEP or Solo 401k? 

Choosing between Self-Employed 401k vs. SEP IRA depends on your business, income, and desired retirement savings contributions. The SEP IRA is ideal for those with employees, offering higher contribution limits and tax-deductible contributions than regular IRAs. 

On the other hand, the Solo 401(k) suits those without employees, featuring even higher contribution limits, flexibility in pre-tax or post-tax contributions, and the ability for both employer and employee contributions.

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