How To Open Solo 401k Vanguard

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Of course! Here is a very lengthy and detailed guide on how to open a Solo 401(k) at Vanguard.

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Are you a self-employed individual, a freelancer, or a business owner with no full-time employees? If so, you've likely heard of the incredible power of a Solo 401(k). This retirement plan allows you to contribute to your retirement savings as both an employee and an employer, offering much higher contribution limits than a traditional IRA or SEP IRA. And if you're looking for a low-cost, straightforward platform to manage your investments, Vanguard is a name that often comes to mind.

In this comprehensive, step-by-step guide, we'll walk you through the entire process of opening a Solo 401(k) with Vanguard's plan administrator, Ascensus, and get you on the fast track to building a robust retirement nest egg. Let's dive in!


How To Open Solo 401k Vanguard
How To Open Solo 401k Vanguard

Step 1: Determine Your Eligibility and Gather Your Information

Before you can even think about opening the account, the very first thing you need to do is confirm that you qualify for a Solo 401(k). So, ask yourself:

  • Do I have self-employment income? This is the most crucial requirement. Your income can come from a sole proprietorship, partnership, LLC, or corporation.

  • Do I have any full-time employees? The "Solo" in Solo 401(k) is key. You cannot have any full-time employees who work more than 1,000 hours per year, except for yourself and your spouse if they also work in the business. If you hire a full-time employee later, you will need to update your plan to include them, which can add significant administrative complexity.

If you answered yes to the first question and no to the second, congratulations! You are eligible.

Now, let's get your ducks in a row. You will need some key information to complete the application process:

  • Your Employer Identification Number (EIN). If you're a sole proprietor using your Social Security number, you'll need to apply for a free EIN from the IRS before you can open the plan. This is a critical step.

  • Your personal information, including your Social Security number, date of birth, and address.

  • Your business name and address.

  • Your bank account and routing numbers for funding the account.

  • Your estimated self-employment income for the year. This will help you determine your potential contribution limits.


Step 2: Contact Vanguard's Plan Administrator

Here’s a crucial detail: Vanguard no longer directly administers Solo 401(k) plans. Instead, they partner with a third-party administrator, Ascensus. The good news is that this plan still features Vanguard's famously low-cost investment options.

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You have two main options for starting the process:

  • If you are a new Vanguard client: The most direct way to get started is to call Vanguard at 1-800-992-1788. A representative will be able to walk you through the application process for the Individual 401(k) featuring Vanguard investments.

  • If you are an existing Vanguard client: You may be able to set up the account online by logging into your account and selecting "Individual 401(k)." However, it is often recommended to call to ensure you are setting up the correct type of plan and to get assistance with the paperwork.

Pro Tip: It can be incredibly helpful to have a representative on the phone with you for your first time setting up the plan. Don't hesitate to call and ask for assistance. They can guide you through the forms and ensure everything is filled out correctly.

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Step 3: Complete the Solo 401(k) Plan Documents

This is where the paperwork comes in. The representative you speak with will guide you through this process, but here's a general idea of what you'll be doing:

  • Establish the Plan: You will set up the official Solo 401(k) plan for your business. This involves creating a plan document that outlines the rules of the plan. Ascensus will provide you with the necessary documents.

  • Open the Accounts: You will need to open two separate accounts within the Solo 401(k) structure:

    • A brokerage account where you will hold your investments.

    • A trust account for the plan's assets.

  • Choose Your Contribution Type(s): A key advantage of the Solo 401(k) is the flexibility to contribute in two ways:

    • Pre-tax (Traditional) contributions: These contributions are tax-deductible in the current year, and your earnings grow tax-deferred. You'll pay taxes on withdrawals in retirement.

    • Roth (after-tax) contributions: You contribute with after-tax dollars, but your qualified withdrawals in retirement are completely tax-free.

You can choose to make both types of contributions. This allows for a great deal of tax planning flexibility.


Step 4: Understand and Make Your Contributions

Now for the exciting part—funding your account! This is where the Solo 401(k) truly shines. You can contribute in two capacities:

As an Employee (Salary Deferral)

  • For 2025, the employee contribution limit is $23,500.

  • If you are age 50 or older, you can contribute an additional $7,500 as a "catch-up" contribution, bringing your employee total to $31,000.

  • You can contribute up to 100% of your compensation as an employee, up to this limit.

As an Employer (Profit-Sharing)

  • As the employer, you can contribute up to 25% of your compensation.

  • For self-employed individuals, "compensation" is defined as your net earnings from self-employment after deducting one-half of your self-employment tax and the contributions you made for yourself. This calculation can be a bit complex, so it's a good idea to consult with a tax professional.

Total Contribution Limit for 2025

The combined employee and employer contributions cannot exceed a total of $70,000 for 2025. If you are 50 or older, the total can go up to $77,500 including the catch-up contribution.

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Important Deadlines:

  • Employee contributions: You must make your election for salary deferrals by the end of your business's fiscal year.

  • Employer contributions: The deadline to make employer contributions is your business's tax filing deadline, including extensions.


Step 5: Choose Your Investments and Manage Your Account

Once your account is funded, it's time to invest! With the Solo 401(k) featuring Vanguard investments, you'll have access to a wide range of their low-cost mutual funds and ETFs.

  • Vanguard Mutual Funds: Known for their incredibly low expense ratios, these funds are a hallmark of Vanguard's investor-first philosophy.

  • Vanguard ETFs (Exchange-Traded Funds): These are like mutual funds that trade like stocks. You can buy and sell Vanguard ETFs commission-free online through Vanguard Brokerage Services.

Important Note on Fees: While there are no setup fees for the Solo 401(k), there is a $20 annual fee for each Vanguard mutual fund held in the account. This fee is waived if you have at least $50,000 in qualifying Vanguard assets. This is a great incentive to consolidate your investments with them.


Step 6: Understand the Ongoing Administration and Compliance

The Solo 401(k) requires a bit more administration than a SEP IRA, but it's manageable.

  • Form 5500-EZ Filing: Once your plan's assets reach $250,000 at the end of the year, you are required to file Form 5500-EZ with the IRS. Ascensus, as the plan administrator, will provide you with the information you need to complete this form.

  • Recordkeeping: Keep good records of your contributions and any distributions.

  • Beneficiaries: Make sure you designate and keep your beneficiaries updated.

This may sound complex, but for many self-employed individuals, the benefits of higher contribution limits and a Roth option far outweigh the administrative burden.


Frequently Asked Questions

Frequently Asked Questions (FAQs)

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How to Determine My Solo 401(k) Contribution Limit for 2025?

Your contribution limit is a combination of your employee deferral (up to $23,500, or $31,000 if 50+) and an employer profit-sharing contribution (up to 25% of your net self-employment income). The total combined contribution for 2025 cannot exceed $70,000 ($77,500 if 50+).

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How to Apply for an EIN for My Solo 401(k)?

You can apply for a free Employer Identification Number (EIN) online directly through the IRS website. It's a quick and easy process.

How to Fund My Vanguard Solo 401(k) Account?

You can fund your account via an electronic bank transfer (ACH) or by mailing a check from your business bank account. You'll need to specify whether the contribution is an employee deferral or an employer profit-sharing contribution.

How to Roll Over an Old 401(k) or IRA into My Solo 401(k)?

Vanguard's Individual 401(k) accepts rollovers from traditional IRAs, SEP IRAs, and former employer 401(k) plans. You will need to contact your previous plan administrator to initiate the rollover.

How to Choose Between a Traditional and Roth Solo 401(k)?

A Traditional Solo 401(k) gives you a tax deduction now, while a Roth Solo 401(k) provides tax-free withdrawals in retirement. The best choice depends on your current income, future tax bracket expectations, and overall financial situation. You can choose to have both.

How to Take a Loan from a Vanguard Solo 401(k)?

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Unfortunately, the Solo 401(k) plan administered by Ascensus and featuring Vanguard investments does not allow for loans. This is a key difference from some other providers and something to consider before opening the account.

How to Take a Withdrawal from My Solo 401(k)?

You can generally take withdrawals after a "triggering event" like reaching age 59½, separation from service, or disability. Withdrawals before age 59½ may be subject to a 10% penalty and income tax, unless an exception applies.

How to Handle the Form 5500-EZ Filing Requirement?

Once your plan assets reach $250,000, you are required to file this form with the IRS. You will receive information from Ascensus to help you complete it. You can file it yourself or work with a tax professional.

How to Close or Terminate My Solo 401(k)?

You can terminate your plan at any time. When you do, you must distribute the assets and file a final Form 5500-EZ.

How to Find the Latest Contribution Limits for Future Years?

The IRS announces the contribution limits for the upcoming year in the fall. You can check the IRS website or trusted financial news sources for the most up-to-date information.

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