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Fidelity Investments 403(b) Custodial Account Application, page 1
Moderate · 48/100Form Complexity Index

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What this form asks for

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The Fidelity Investments 403(b) Custodial Account Application is the official document required to open a tax-advantaged retirement savings plan with Fidelity. By completing this form, applicants provide personal and employment details, select investment options for their contributions, and designate beneficiaries for their account. This is a crucial step in setting up a long-term retirement strategy for employees of eligible organizations. Today, this form can be filled out quickly and accurately using AI-powered services like Instafill.ai, which can also convert non-fillable PDF versions into interactive fillable forms.
Fillable fields85
Pages4
Form Complexity IndexModerate, 48/100

The AI checks your answers before you download

13 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Applicant Signature and Date Presence

Verifies that the applicant's signature and the date are present in Section 6. An application is not legally binding without a signature, which signifies the applicant's agreement to all terms and conditions. If the signature or date is missing, the application is invalid and must be rejected and returned to the applicant.

Social Security Number Format

Ensures the Social Security Number in Section 1 is a valid 9-digit number (XXX-XX-XXXX or XXXXXXXXX). This is the primary identifier for tax reporting to the IRS and identity verification. An invalid or missing SSN will prevent the account from being opened and lead to immediate rejection of the form.

Investment Allocation Total Equals 100%

Calculates the sum of all percentage fields for investment options in Section 3 to ensure they total exactly 100%. This is critical for ensuring that 100% of the applicant's contributions are invested according to their wishes. If the total is not 100%, the application will be held, and the applicant will be contacted to correct the allocation.

Primary Beneficiary Percentage Sum

Validates that the sum of percentages assigned to all Primary Beneficiaries in Section 4 equals 100%. This check prevents ambiguity in how assets are to be distributed upon the account holder's death. An incorrect total can lead to legal complications or distribution according to default plan rules, overriding the applicant's intent.

Contingent Beneficiary Percentage Sum

Validates that the sum of percentages assigned to all Contingent Beneficiaries in Section 4 equals 100%. This ensures a clear line of succession for the account assets if no primary beneficiaries are living at the time of the account holder's death. Failure to total 100% will cause the form to be returned for correction.

Spousal Consent Requirement Logic

Checks if the applicant is married and has designated their spouse as the primary beneficiary for less than 50% of the account. If these conditions are met, this validation confirms that the Spousal Consent in Section 5 is properly signed, dated, and notarized. This is a critical legal requirement under ERISA to protect spousal rights, and failure to comply renders the beneficiary designation void.

And 7 more checks
  • Beneficiary Uniqueness Check
  • Date of Birth and Date of Hire Validity
  • Completeness of Personal Information
  • Completeness of Employment Information
  • Whole Percentage Validation
  • Zip Code Format
  • Notarization of Spousal Consent

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How to Fill Out Fidelity 403(b) Account Application Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload the Fidelity 403(b) Account Application or select it from the platform's template library.
  2. Use the AI assistant to accurately fill in your personal details in Section 1, including your Social Security number, name, and address.
  3. Provide your current employment information in Section 2, detailing your employer's name and address.
  4. In Section 3, allocate your contribution percentages across the available investment options, ensuring the total equals 100%.
  5. Carefully designate your primary and contingent beneficiaries in Section 4, specifying their information and percentage shares.
  6. Complete the Spousal Consent in Section 5 if required, which may need a notary's signature.
  7. Review all entered information for accuracy, then electronically sign and date the authorization in Section 6 to finalize your application.

Frequently Asked Questions About Fidelity 403(b) Account Application

 

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Can I fill other forms too?
This plan is for your Fidelity 403(b) Account Application: your own AI agent fills it as often as 5 times a month. To fill other forms and upload your own, choose a Professional plan from your account.
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How does the AI fill out Fidelity 403(b) Account Application?
You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of Fidelity 403(b) Account Application, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
What happens to my information?
It is encrypted in transit and at rest, and it is never used to train AI.
How complex is Fidelity 403(b) Account Application to fill out?
Fidelity 403(b) Account Application has a Form Complexity Index of 48 out of 100, in the moderate tier: 85 fillable fields across 4 pages. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is the purpose of this form?
This form is an application to open a new 403(b) custodial account with Fidelity Investments. A 403(b) is a retirement savings plan available to employees of certain public schools and tax-exempt organizations.
Who needs to fill out this form?
You should complete this form if you are an employee of an eligible organization and wish to open a new 403(b) retirement account managed by Fidelity.
What information do I need to provide to complete the application?
You will need your Social Security number, date of birth, contact information, and employment details. You will also need to decide on your investment allocations and beneficiary designations.
Where do I send the completed form?
Unless your employer instructs you otherwise, mail the completed and signed application to Fidelity Investments, P.O. Box 770002, Cincinnati, OH 45277-0090.
What happens after I submit this application?
Fidelity will establish your account and send you a written confirmation. After that, you can submit a Salary Reduction Agreement to your employer to begin contributing to your account.
How do I select my investments in Section 3?
You must allocate 100% of your contributions across the investment options available in your employer's plan. Check with your employer for a list of available funds and enter your choices as whole percentages on the form.
Do I have to fill out the Spousal Consent section?
You only need to complete Section 5 if you are married, your plan is subject to ERISA, and you are designating someone other than your spouse as the primary beneficiary for 50% or more of your account. In that case, your spouse must sign in the presence of a notary.
How do I designate beneficiaries for my account?
In Section 4, list the people or trusts you want to receive your account balance upon your death. The percentages for your primary beneficiaries must total 100%, and the same applies to your contingent beneficiaries.
What if I want to name more beneficiaries than the form has space for?
If you need to name more beneficiaries, you can attach a separate, signed, and dated piece of paper with the additional information. Ensure the percentage allocations still total 100% for each group.
Are there fees for this 403(b) account?
Yes, your account may have an annual maintenance fee and/or a recordkeeping fee. These fees vary, so you should contact Fidelity or your employer to understand the costs specific to your plan.
What happens if I don't designate a beneficiary?
If you do not designate a beneficiary, your surviving spouse will automatically become your beneficiary. If you have no surviving spouse, the proceeds will be paid to your estate.
Can I use an AI tool to help me fill out this form?
Yes, services like Instafill.ai use AI to accurately auto-fill form fields with your saved information, which can save you time and help prevent errors.
How can I fill out this Fidelity 403(b) application online?
You can use a service like Instafill.ai to complete this form online. Simply upload the PDF, and the tool will make it fillable, allowing you to type your information directly into the fields and save your progress.
The PDF form I have is not fillable. What should I do?
If your PDF is not interactive, you can use a tool like Instafill.ai to convert the flat PDF into a fillable form. This allows you to easily type in your information, save, and print the completed document.
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