Form 5305‑SA – SIMPLE IRA Custodial Agreement Guide

I still remember reviewing a stack of SIMPLE IRA documents during a hectic January close and spotting a tiny problem that could have caused a big delay. The custodian had used an older template without the account number field.

That single miss would have meant back‑and‑forth emails, reprints, and needless stress. If you have felt that same “not again” moment, you are exactly who I am writing for.

SIMPLE IRAs are supposed to be simple. The trick is starting with the right IRS model agreement and applying it the right way. For custodians, CPAs, EAs, payroll providers, and small‑employer admins, that means using the IRS model custodial agreement, Form 5305‑SA, in its current April 2017 revision, and understanding what changed. The IRS recognizes Forms 5305‑S and 5305‑SA as the model trust and custodial account documents to set up a participant’s SIMPLE IRA, which is why getting this form right reduces friction from day one.

Key Takeaways

• Form 5305‑SA is the IRS model custodial agreement used to establish an individual’s SIMPLE IRA at a financial institution.
• The current revision is April 2017. Always confirm the revision on IRS.gov before you adopt or update your template.
• The April 2017 update aligned language with law, added an account number field in place of SSN references, and clarified portability after the two‑year participation period.
• Use 5305‑SA for a custodial structure and 5305‑S for a trust structure. The SIMPLE rules are the same, only the legal holding arrangement differs.
• Contribution limits change with cost‑of‑living adjustments. For 2025, the basic SIMPLE salary reduction limit is 16,500, with special Secure 2.0 variations described in IRS materials. Your document should reference COLA language rather than hard‑coding a number. (stayexempt.irs.gov)

Quick note, not legal or tax advice. Use this as a practical guide, then confirm choices with your plan counsel or tax advisor.

What Form 5305‑SA is and who actually uses it

Form 5305‑SA is the IRS’s model “SIMPLE Individual Retirement Custodial Account” agreement. A financial institution uses it when opening and governing a participant’s SIMPLE IRA that sits under an employer’s SIMPLE plan. The model language standardizes how contributions are accepted, how assets are held, how distributions work, and what must be reported, so the account operates under SIMPLE IRA rules from day one.

You will see two audiences around this form:

• The custodian or provider, who adopts the model agreement and adds any operational terms that do not conflict with IRS requirements.
• The employee participant, who signs the custodial agreement when opening the SIMPLE IRA at the chosen institution, usually after the employer sets up the SIMPLE plan on a 5304‑SIMPLE or 5305‑SIMPLE plan document.

If you are the employer or your firm advises employers, 5305‑SA matters because each eligible employee needs a SIMPLE IRA at a bank, brokerage, or similar provider, and this model agreement is what keeps every account compliant at the document level. The IRS’s SIMPLE plan pages and fix‑it guide confirm that 5305‑S and 5305‑SA are the standard participant‑level documents for trust and custodial arrangements.

Why the April 2017 revision still matters in 2026

The IRS lists Form 5305‑SA with an April 2017 revision date on its Forms and Publications index, which remains the current revision as of today. That is your signal to verify your template’s footer and language before you onboard new accounts. The April 2017 version aligned the document with law changes and cleared up portability rules after the two‑year participation period. It also replaced SSN references with an account number field, which helps institutions reduce sensitive data on the face of the form.

A quick compliance habit I recommend, especially for custodians and advisory firms, is to build a short intake checklist that includes: confirm “April 2017” on the footer, confirm presence of the account number field, and confirm Article VIII language does not imply IRS approval. That tiny investment saves hours during peak season.

What changed in portability and why the “two‑year rule” is the hinge

Congress expanded rollover options in the Consolidated Appropriations Act of 2016. After an employee has participated in the SIMPLE IRA for two years, rollovers can be made between SIMPLE IRAs and other eligible retirement arrangements, subject to the usual tax rules. During the first two years, a SIMPLE IRA can transfer only to another SIMPLE IRA, and withdrawals in that window can trigger a 25 percent early distribution tax. The IRS explains both the expanded rollover options and the two‑year timing in plain language on its SIMPLE IRA FAQs and Issue Snapshot.

That timing detail sounds small, yet it is where many operational mistakes happen. If your team documents the participant’s exact first‑contribution date and ties it to the two‑year anniversary, you will cut down on rejected transfers and avoid rework when coordinating trustee‑to‑trustee moves.

How Form 5305‑SA actually sets up the SIMPLE IRA

Think of Form 5305‑SA as the backbone of each employee’s SIMPLE IRA at the custodian you choose. When you execute it, you lock in the account’s legal framework, who does what, and how money moves. In practice, you pair the model agreement with your disclosures, fee schedule, and operating procedures so that contributions, distributions, statements, and reporting all line up with the Internal Revenue Code.

Custodial agreement basics, in plain English

The April 2017 Form 5305‑SA spells out what the custodian must do, which assets can be held, and how contributions and withdrawals work. It also sets expectations for reporting and recordkeeping. Your job is to adopt the model language as written, then use Article VIII for operational specifics that do not change SIMPLE rules or imply IRS approval.

Core element	What it means for you
Contributions	Salary reduction deferrals and employer contributions must follow the employer’s SIMPLE plan document. Deposit on time, code correctly, and track catch up amounts.
Distributions	Withdrawals follow IRA tax rules. Early withdrawal taxes can apply. Keep good records of first contribution dates for the two year rule.
Investments	Follow the custodian’s permissible menu and your account agreement. Keep documentation tidy for year end reporting.
Reporting	Expect Form 5498 and Form 1099‑R as usual for IRAs. Confirm addresses, names, and account numbers are current.
Custom terms	Use Article VIII for things like fees, e‑delivery, and processing cutoffs. Never change statutory rules.

I have seen many review delays caused by loose file naming and missing backup. A simple fix is a standing naming pattern for workpapers and a short pre‑review checklist. That small habit cuts reviewer time in half, especially when returns stack up.

Required disclosures you should not skip

Even though the model agreement is short, your packet must still include clear disclosures. Make sure your onboarding set covers, in reader friendly language:

• Eligibility and enrollment windows.
• Contribution limits, with a statement that limits are adjusted for inflation each year.
• Timing and method for salary deferrals and employer contributions.
• Distribution rules, including early withdrawal taxes and the two year SIMPLE rule.
• Rollover and transfer mechanics, and how trustee to trustee transfers work.
• Fees, service levels, and how to request documents or updates.
• Beneficiary rules and how to change designations.

Pro move: add a one page “SIMPLE IRA Quick Start” that front loads the two year rule, contribution timing, and contact paths. People read short, clear sheets, especially during onboarding.

Compliance guardrails you must keep

Adopting the April 2017 model and following Articles I through VII keeps your custodial terms aligned with the Code. Keep three guardrails in place:

• Use the April 2017 version, not an older template.
• Keep any custom language inside Article VIII, and do not imply IRS approval.
• Reference cost of living adjustments for limits so your packet does not go stale.

Skip these and you invite avoidable corrections, reprints, or in tough cases, reportable errors.

What changed in 2017, and why the details reduce rework

The April 2017 revision did a cleanup that still pays off today. It removed outdated references, aligned language with current law, and cleared up portability once an employee has met the two year participation period. The form also replaced Social Security number fields with an account number box. That shift matters for both privacy and operations. It reduces the surface area for sensitive data and keeps identification consistent across your systems.

The account number box, not an SSN

Here is how I teach teams to avoid mistakes with the identification box:

• Use your institution’s internal account number format.
• Keep a documented crosswalk in your secure system, not on the paper form.
• Make the account number visible on the signature page so reviewers can match files without digging.

Field	Purpose	Practical note
Account number	Internal identifier for the IRA	Replace SSN requests on the template. Support with your secure system of record.
Custodian name	Who holds the assets	Keep legal entity names consistent with your statements.
Owner name	Participant identity	Match to HR or payroll records before first deposit.
Establishment date	Date the account was set up	Start the two year clock from the first contribution date, and track both.
Signatures	Authorization	Confirm correct account number appears near the signature block.

Contribution and eligibility text, updated approach

The April 2017 language modernized contribution text and points to inflation indexing. Rather than hard coding a number in your cover materials, call out that the salary reduction and catch up limits are indexed each year, and that payroll systems should be checked annually for updates. This keeps your materials evergreen and reduces year end scrambles.

A simple setup flow you can follow today

If you are opening multiple SIMPLE IRAs at once, use this short flow and you will reduce back and forth during peak season.

• Confirm you are using Form 5305‑SA with the April 2017 footer.
• Prepare your disclosures packet and fee schedule, and make sure Article VIII language does not alter statutory rules.
• Collect the participant’s legal name, address, date of birth, and beneficiary election, then assign an account number.
• Open the account in your system, print or e‑deliver the agreement, and collect signatures.
• Document the date of the first contribution. This is critical for the two year rule.
• Test a small salary reduction deposit and confirm it posts to the correct account.
• Archive everything with clear file names so reviewers can find exactly what they need later.

If your firm struggles to keep these steps consistent across dozens of accounts, a standardized workpaper and a named reviewer at each step will save you from late season chasing. Accountably’s delivery teams often build this kind of light, repeatable packet for firms that want fewer review loops and faster approvals, and then hand it back to the in‑house team to run daily.

Transfers and rollovers, the two year rule in action

The portability rules for SIMPLE IRAs are straightforward once you anchor them to the first contribution date. That date starts a two year clock. During the first two years, assets can move only to another SIMPLE IRA. After the two year mark, you can roll to eligible retirement plans, or to a traditional IRA, subject to normal tax rules.

The two year participation requirement, step by step

• Find the first contribution date. This is the key data point, not the account open date.
• Count two years from that exact date. Use a calendar reminder in your system.
• Before two years, limit outbound moves to another SIMPLE IRA.
• After two years, you may roll over to traditional IRAs or eligible employer plans that accept the funds.
• If in doubt, use a direct trustee to trustee transfer to avoid withholding and timing errors.

Timeline checkpoint	What you can do	What you should avoid
Day 0 to Year 2	Transfer to another SIMPLE IRA only	Rolling to a traditional IRA or a qualified plan
Day after Year 2	Roll to a traditional IRA or eligible plan, or transfer between SIMPLE IRAs	Withholding on indirect rollovers when a direct transfer is available
Always	Document the first contribution date, keep file notes, and confirm receiving plan acceptance	Guessing on dates, or moving funds without a receiving plan confirmation

Pro tip: build a field for “First SIMPLE contribution date” in your CRM or custodian profile. Reviewers will thank you during peak season.

Eligible transfer and rollover sources after two years

Once the two year period has passed, you can move funds to or from a SIMPLE IRA with more flexibility, so long as the receiving arrangement accepts the assets.

• Outbound after two years
  • Traditional IRA
  • Eligible employer plans, for example 401(k), 403(b), and governmental 457(b), if the plan accepts rollovers
  • Another SIMPLE IRA
• Inbound after two years
  • Traditional IRAs to a SIMPLE IRA when allowed by the tax rules and your provider’s policies
  • Eligible employer plans, if the SIMPLE IRA custodian permits it and the assets qualify

Always confirm acceptance rules on the receiving side. Plans differ on whether they take prior SIMPLE assets, even when the Code allows the move.

Avoid the common portability mistakes

• Moving funds before the two year mark because the account open date was used instead of the first contribution date.
• Using an indirect rollover when a trustee to trustee transfer would have avoided withholding and reduced risk.
• Missing a plan’s document rule that limits the type of money it can accept.
• Forgetting to update beneficiary designations when money moves.
• Omitting a clear note in the file, which forces a second reviewer to re‑trace the same facts.

Article VIII additions, what you can add and what you cannot

Article VIII is the one place you can add custom operational language to a 5305‑SA. Keep it practical, do not change SIMPLE IRA rules, and do not imply the IRS has reviewed or approved your additions.

Safe additions that help operations

• Fees and billing practices
• Electronic delivery consent and how to revoke it
• Processing cutoffs for deposits and distributions
• Service level expectations for tasks like beneficiary updates
• Data sharing consent for payroll or recordkeeping integrations
• Contact paths for corrections or document requests

Changes to avoid, full stop

• Anything that alters eligibility, contribution limits, withholding, or distribution rules
• Language that suggests the IRS reviewed, endorsed, or approved your added terms
• Provisions that contradict Articles I through VII
• A statement that conflicts with the two year rule or rollover definitions

If a term would change how the Code applies, it does not belong in Article VIII. Keep Article VIII as the place you define how you operate, not what the law says.

Contribution limits, what to include in your packet

Do not hard code dollar figures into your 5305‑SA cover materials. Instead, state that salary reduction and catch up limits are adjusted each year for inflation, and point readers to your yearly update page or the IRS cost of living list. Then, make a calendar task every fall to review updated limits, refresh payroll settings, and send a short notice to participants.

Short, plain notices work. One page with the new limit, the catch up amount, the effective year, and how to update deferral elections will save you hours of support time.

5305‑SA vs 5305‑S, which one you need and why

Both documents live in the SIMPLE IRA world. The difference is the legal structure that holds the assets. Choose based on your provider’s charter and how you administer the accounts. The underlying SIMPLE rules do not change.

Feature	5305‑SA, custodial account	5305‑S, trust account
Who holds assets	Custodian	Trustee
Participant agreement	SIMPLE Individual Retirement Custodial Account	SIMPLE Individual Retirement Trust Account
Use case	Brokerage or bank custody model	Trust company model
What changes for you	Document title and legal structure	Document title and legal structure
What does not change	SIMPLE eligibility, contributions, two year rule, reporting	SIMPLE eligibility, contributions, two year rule, reporting

If you are unsure which your provider uses, check your institution agreement and your statements. The title block will tell you if you are in a custodial or trust model.

Align your custodial agreement and your disclosures, a practical checklist

Teams get into trouble when the agreement says one thing and the disclosures say another. Keep these in sync.

Alignment checklist you can copy

• Confirm the 5305‑SA revision shows April 2017 in the footer.
• Match Articles I through VII language to the model text.
• Keep all custom items inside Article VIII, and remove any hint of IRS endorsement language.
• Use an account number field, not an SSN box, on your template.
• Include a clear two year rule summary in your disclosures, with an example timeline.
• Reference cost of living adjustments for contribution limits.
• Provide a beneficiary form and instructions in the same packet.
• Add a one page “How to make your first deposit” guide for payroll.
• Train reviewers to check first contribution date on every file.

Small example that helps reviewers, add a header on your workpaper that lists, account number, first contribution date, two year anniversary date, and beneficiary on file. When files scale, these cues save time.

Confirm you are using the April 2017 version, then lock it in

Make verification part of your process, not a one time fix.

Quick verification routine

• Open your master PDF and check the footer for “April 2017.”
• If your template is older, replace it, then re‑issue your adoption kit.
• Spot check five recent accounts to confirm the account number field is present and filled.
• Review your Article VIII language for forbidden changes or any hint of IRS endorsement.
• Archive the old template in a separate “retired forms” folder so it never reappears.

If your firm often goes through seasonal spikes or brings in temps, label your current template with a date in the filename, for example 5305‑SA_Apr2017_current.pdf, so the right form is easy to find.

Where to find the current version and instructions

Get the form package directly from IRS.gov. Search for “Form 5305‑SA” on the Forms and Publications page, download the April 2017 PDF, and save the instructions with it. Print to PDF again if your system strips the footer when merging packets. If your provider has a document library, request their current adoption kit to confirm nothing conflicts with the IRS model.

Printing and e‑delivery tips

• Use PDF forms that preserve the footer and any field hints.
• If you collect e‑signatures, test the signature blocks and file name conventions.
• Include a separate file with your Article VIII terms and your fee schedule, both dated.
• Keep a version log. Reviewers can then confirm which terms applied at the time of signature.

Keep compliance boring, repeatable, and easy to audit. A clean packet reduces follow ups, makes reviewers faster, and gives you a better client experience.

Related forms you will see with 5305‑SA

Form 5305‑SA establishes the custodial SIMPLE IRA. You will still use a set of companion documents around it.

• SIMPLE plan document, for example 5304‑SIMPLE or 5305‑SIMPLE, depending on whether employees choose the custodian or the employer designates one
• Beneficiary designation and change forms
• IRA transfer request and IRA rollover election forms
• Information change forms, address updates, and name changes
• Distribution request forms and withholding elections
• Disclosure statement that summarizes key rules in plain language

Form 5305‑SA starts the custodial account. The rest of the packet keeps the account usable and clear all year.

Adoption and amendments, what the IRS clarified and what remains on you

The April 2017 model language tightened alignment with current law and added the account number field. It also confirmed portability after two years. The IRS did not prescribe your amendment mechanics or timing. That means you, your document vendor, or your custodian should set a practical amendment policy, train staff on the update, and issue a short participant notice when you roll out a new packet.

A simple amendment playbook

• Identify the change, for example updated disclosures or a fresh fee schedule.
• Update Article VIII if needed, without changing core SIMPLE rules.
• Date the new files and move the prior set to a retired folder.
• Notify participants when the change affects their experience or fees.
• Train reviewers and support staff on the effective date and the new steps.

FAQs

What is Form 5305‑SA used for, in one sentence?

It is the IRS model custodial agreement that establishes a participant’s SIMPLE IRA at a financial institution, so contributions, distributions, and reporting follow SIMPLE IRA rules.

What is the difference between 5304‑SIMPLE and 5305‑SIMPLE?

5304‑SIMPLE lets employees choose their own IRA provider, while 5305‑SIMPLE designates a single provider for all eligible employees. Your choice affects operations, not the underlying SIMPLE rules.

What is the difference between 5305‑SA and 5305‑S?

5305‑SA is the custodial version, and 5305‑S is the trust version. You pick based on whether the provider serves as custodian or trustee. SIMPLE mechanics remain the same.

What is the five year rule for beneficiaries?

If the five year rule applies to a non‑designated beneficiary, the inherited IRA must be fully distributed by December 31 of the fifth year after death. Always confirm which post‑death rule applies to your situation.

Where can I get the current version and instructions?

Download them from IRS.gov by searching “Form 5305‑SA,” then confirm the PDF footer shows April 2017. Save the instructions with your packet, and keep both in your internal library.

Closing checklist and next steps

Use this short checklist before you open the next SIMPLE IRA:

• April 2017 5305‑SA in the footer
• Account number field present, SSN not requested on the face of the form
• Article VIII contains only operational terms, no IRS endorsement language
• Two year rule explained in your disclosure, first contribution date captured
• Contribution limits framed with COLA language, not hard coded numbers
• Beneficiary form included and completed