Australian Superannuation and Form 3520: The Classification Question

1. Why Super Is Hard

• It is a trust. Australian super funds are generally established as trusts under Australian law, which brings the U.S. foreign trust rules into play.
• It mixes contribution types. A single account can hold compulsory employer contributions, salary-sacrifice contributions, voluntary after-tax contributions, spouse contributions, government co-contributions, and in some cases proceeds from selling a home.
• The treaty does not help with accruals. The U.S.–Australia treaty's pension provisions available to U.S. citizens do not include deferral of U.S. tax on income inside the fund. See the treaty discussion in Foreign Retirement Accounts & Form 3520.
• There is no super-specific guidance. Unlike Canadian plans (Rev. Proc. 2014-55), super has no dedicated IRS revenue procedure, so practitioners work from general principles.

2. The Competing Classifications

3. Does Rev. Proc. 2020-17 Exempt Super From Form 3520?

Rev. Proc. 2020-17 exempts eligible individuals from Form 3520 and 3520-A reporting for tax-favored foreign retirement trusts that meet the conditions in section 5.03. Super clearly meets some conditions: it is tax-favored, it reports annually to the Australian Taxation Office, and access is generally restricted until a preservation age, retirement or specified events. The debate centers on two others.

The result: some practitioners conclude that typical public and employer funds qualify and do not file Forms 3520 and 3520-A; others file protectively given the penalty exposure, the greater of ,000 or 5% of trust assets for Form 3520-A under IRC § 6677(b). The individual must also be an eligible individual under section 5.02, which requires compliance with income tax reporting for the account. The 2024 proposed regulations under § 6048 would revise these exemptions; see the foreign retirement accounts article for a comparison.

4. Self-Managed Super Funds (SMSFs)

An SMSF is a trust whose members are generally also its trustees, or directors of its corporate trustee. Because the member controls the fund and is typically the source of its assets, SMSFs are generally treated as foreign grantor trusts (IRC §§ 671–679) owned by the U.S. member, and Rev. Proc. 2020-17 is generally not relied on for them.

• Income: the fund's income and gains are reported by the U.S. owner annually on Form 1040.
• Form 3520-A: because the U.S. member is usually a trustee, the trust itself can file Form 3520-A and issue the owner and beneficiary statements, rather than relying on a substitute Form 3520-A prepared by the owner. Either way, the filing must be made. See the Form 3520-A Guide and Substitute Form 3520-A.
• Form 3520: contributions to the fund and distributions from it are reported as transfers and distributions under IRC § 6048.
• PFICs: Australian managed funds and exchange-traded funds held by an SMSF are generally PFICs (IRC §§ 1291–1298) owned through the grantor trust, with Form 8621 filings.
• Australian tax: Australian tax paid by the fund raises foreign tax credit questions for the U.S. owner.

5. PFICs Inside Public and Employer Funds

Public super funds invest heavily through pooled vehicles. The regulatory exception from Form 8621 for PFICs held through a foreign pension fund, Treas. Reg. § 1.1298-1(c)(4), applies where a treaty defers U.S. tax on the fund's income until distribution. Because the U.S.–Australia treaty (and its Technical Explanation) does not provide that deferral, the exception is generally not available for super. Practitioners differ on whether a member of a § 402(b) fund is treated as an indirect PFIC shareholder in the first place, and many do not file Form 8621 for public funds where the member has no investment control. This is an area where the conclusion and its basis should be documented.

6. Reporting That Applies Regardless

• FBAR: super accounts are generally treated as foreign financial accounts for FBAR purposes under 31 CFR § 1010.350.
• Form 8938: an interest in a foreign pension or retirement arrangement is generally a specified foreign financial asset reported on Form 8938 (IRC § 6038D).
• Distributions: withdrawals that are tax-free in Australia after age 60 are not automatically tax-free in the United States. The U.S. treatment depends on the classification and the member's investment in the contract under IRC § 72.
• Treaty positions: any position that relies on the treaty is generally disclosed on Form 8833.

7. Summary Table

8. Missed Years & Penalty Mitigation

Clients returning from Australia often arrive with several years of superannuation accounts that were never reported on Forms 3520, 3520-A, 8938, or FinCEN Form 114 (FBAR). Whether the delinquency involves unpaid income tax depends on whether the fund was an employees' trust under § 402(b) or a foreign grantor trust under §§ 671–679, which in turn determines the appropriate remediation procedure.

Where an unfiled Form 3520 or 3520-A triggers penalties under IRC § 6677 (the greater of ,000 or 5% of trust assets), statutory relief requires demonstrating reasonable cause under Treas. Reg. § 301.6651-1(c) and the standards established in United States v. Boyle, 469 U.S. 241 (1985). IRS international penalty administrative practices are detailed in IRM 20.1.9, and recent federal decisions such as Huang v. United States highlight the vital importance of showing affirmative reliance on competent cross-border tax advisers.

For detailed analysis of remediation routes, see Late Form 3520 or 3520-A: Streamlined vs. Delinquent Procedures and Form 3520 Penalty Relief & Reasonable Cause.

9. Primary Statutory, Treaty & Administrative Authorities

For cross-border practitioners, CPAs, and attorneys evaluating Australian superannuation classification, reporting exemptions, and penalty defense, the primary federal statutory provisions, bilateral treaties, Treasury regulations, and IRS administrative guidance include:

10. Frequently Asked Questions (FAQ)