Foreign Pension US Tax: The 4 Questions to Answer

Americans who worked abroad, or who moved to the United States with a retirement account already built elsewhere, almost always start from the same wrong assumption: that a pension which is tax-favored where it sits must also be tax-deferred for US purposes. It is not. Foreign pension US tax treatment is decided by US law and by whatever treaty applies, not by how the host country labels the plan. The analysis is the same in every country, and it comes down to four questions.

Question 1: Is a Foreign Pension Automatically Tax Deferred in the US?

No. Being tax-favored in the host country does nothing for you in the US system. The general rule comes from the operation of IRC §§401(a) and 402(b), not from any IRS pronouncement about foreign plans at large: unless the plan is an employees' trust under §402(b) and the individual is not a highly compensated employee subject to §402(b)(4)(A), income accruing inside the plan is taxed currently. The IRS articulated the same principle in the Canadian context in Rev. Proc. 2014-55, stating that a US citizen or resident who is "a beneficiary of a Canadian retirement plan" is subject to "current U.S. income taxation on income accrued in the plan even though the income is not currently distributed to the beneficiary."

The reason is structural. IRC §401(a), which produces ordinary deferral for a 401(k), opens by requiring "a trust created or organized in the United States," which a foreign scheme cannot meet. So most foreign employer plans are nonqualified deferred compensation analyzed under §402(b). There, employer contributions are taxable to the employee under the principles of IRC §83, with the value of the employee's interest in the trust substituted for the fair market value of the property. A contribution can therefore be taxable in the year your interest vests, decades before you can touch it.

The trap inside the trap is §402(b)(4)(A). Where one of the reasons the trust is not exempt is failure of the coverage rules of §401(a)(26) or §410(b), a highly compensated employee must instead, in lieu of the amount determined under §402(b)(1) or (2), include the vested accrued benefit as of the close of the trust's taxable year in gross income, reduced by the investment in the contract. For a well-paid participant, that converts the entire annual increase in the vested balance into current US taxable income. Whether that trigger is even met for a foreign plan is a live dispute: a foreign scheme fails exemption principally because it is not a US trust, not necessarily because it flunks coverage, and practitioners answer the question differently.

Question 2: Does a Treaty Defer the Tax?

Many US treaties contain a pensions article, and some go further and expressly defer tax on growth inside a foreign plan. It is the most important variable in the analysis.

The US-UK treaty is the best-known example. Article 18(1) provides that where an individual resident in one state participates in a pension scheme established in the other, "income earned by the pension scheme may be taxed as income of that individual only when, and, subject to paragraphs 1 and 2 of Article 17, to the extent that, it is paid to, or for the benefit of, that individual from the pension scheme (and not transferred to another pension scheme)." That closing clause is operative and favorable: a scheme-to-scheme transfer is not treated as a payment, so moving the pot does not itself trigger the tax. Critically, Article 1(5)(a) lists paragraph 1 of Article 18 among the provisions that survive the saving clause in Article 1(4), without which the US could tax its citizens as if the treaty did not exist.

The US-Canada treaty reaches a similar result through Article XVIII(7) and Rev. Proc. 2014-55. The US-Australia treaty is the counterexample: its Article 18 covers pensions, annuities, and social security, but has no provision analogous to UK Article 18(1), and its saving-clause carve-out at Article 1(4)(a) reaches only paragraphs (2) and (6).

Claiming a treaty position is disclosed under IRC §6114 on Form 8833, but the requirement is not absolute. Treas. Reg. §301.6114-1(c) waives reporting in several situations, including a position that a treaty "reduces or modifies the taxation of income derived from dependent personal services, pensions, annuities, social security and other public pensions," and, at (c)(2), for an individual whose reportable treaty items do not exceed $10,000 in the aggregate. Whether the pensions waiver reaches an accrual-deferral position under Article 18(1), which concerns income earned by the scheme rather than income the individual derives from a pension, is not settled, and many practitioners file protectively. The benefit is not always the one you want: UK Article 17(2) makes a UK lump sum taxable only in the source state, but paragraph 2 is not in the Article 1(5)(a) list, so a US citizen cannot use it to keep that lump sum out of US income.

Question 3: What Do You Actually Have to Report?

The income tax on a foreign pension is often modest or fully offset. The information-return penalties are not, and they attach whether or not tax was due.

Two revenue procedures do real work here. Rev. Proc. 2020-17 exempts eligible individuals from §6048 reporting for an "applicable tax-favored foreign trust." Qualifying requires, among other conditions, that the plan be tax-favored and subject to information reporting in its own jurisdiction, accept only personal-services income, limit contributions by a percentage of earned income or to $50,000 annually or $1,000,000 over a lifetime, and restrict withdrawals before retirement age, disability, or death. You must also have reported the related income correctly. Anyone already assessed a §6677 penalty can request abatement on Form 843 marked "Relief pursuant to Revenue Procedure 2020-17" on Line 7. That sentence alone does not suffice: §6.03 also requires Line 7 to explain how the individual meets the §5.02 eligibility conditions and how the trust meets §5.03 or §5.04.

Rev. Proc. 2014-55 does the same for Canadian plans. Both state expressly that they do not affect §6038D or FBAR obligations. The relief is real but narrow, and it never converts into income tax deferral.

Why Do Foreign Pensions Trigger PFIC Problems?

Because of what is inside them. Foreign pension wrappers usually hold locally domiciled pooled funds, and a non-US mutual fund, unit trust, or OEIC will typically be a passive foreign investment company. Absent protection, that triggers the punitive §1291 excess-distribution regime: gain is spread over the holding period, taxed at the highest rate in effect for each year, plus an interest charge.

There is a targeted reporting exception. Treas. Reg. §1.1298-1(c)(4) relieves a beneficiary of a plan treated as a foreign pension fund under a US treaty from filing Form 8621 for PFIC interests held through the fund, but only where the treaty provides that the fund's income is taxable to the individual only when and to the extent it is paid to or for that individual's benefit. Two limits matter: it requires exactly the kind of treaty article discussed above, and it is an exception from §1298(f) reporting, not a general exemption from PFIC taxation.

Question 4: How Are Distributions Taxed?

Distributions are included in gross income under IRC §72, the annuity rules. The IRS describes the mechanic as gross distribution minus cost, meaning your investment in the contract, and warns the income is taxable whether or not a Form 1099 arrives. Basis is what stops you being taxed twice, so amounts already included in income under §402(b) should be tracked as investment in the contract from year one. One override matters here: §402(b)(2) applies §72 "except that distributions of income of such trust before the annuity starting date shall be included in the gross income of the employee without regard to section 72(e)(5)," which denies the pro-rata basis recovery a bare §72 reference would suggest.

Rev. Proc. 2014-55's own example makes the point: a US citizen who established an RRSP while resident in Canada and never included the earnings in US income is treated as having made the deferral election, and when distributions come, "the entire amount of each distribution will be subject to U.S. Federal income tax." Deferral is not exemption: with no US basis, nothing is sheltered at the end.

Host-country tax is relieved through the foreign tax credit on Form 1116, computed separately for each category under IRC §904(d), most commonly the general and passive categories. How pension income sorts into a basket is fact-dependent. The deeper problem is timing: where the US taxes accruals and the host country taxes only distributions, the foreign tax arrives in a year with no matching US income to credit against, which is the practical reason treaty deferral matters. Rev. Proc. 2014-55 acknowledges this: "Due to this mismatch between the timing of the U.S. tax and the Canadian tax, instances of double taxation may arise for which no relief is available under U.S. domestic law."

Are Foreign Social Security Pensions Treated Differently?

Yes, and often sharply so. Treaties assign taxing rights over government social security differently from private pensions. Under Article 17(3) of the US-UK treaty, social security paid by one state to a resident of the other is taxable only in the residence state, and that paragraph is carved out of the saving clause. Under Article 18(2) of the US-Australia treaty, social security and other public pensions are taxable only in the paying state, also carved out. Same subject, opposite allocation, which is why the specific treaty must be read rather than reasoned by analogy.

How Are UK, Canadian, and Australian Plans Actually Treated?

Canadian RRSPs and RRIFs are the most settled. Rev. Proc. 2014-55 made Form 8891 obsolete as of December 31, 2014, and an eligible individual, broadly one who filed required returns and never reported the undistributed earnings as income, is treated as having made the Article XVIII(7) election automatically, with no form required. Form 3520 and Form 3520-A are not required, Form 8938 and FBAR obligations continue, and distributions are taxable under §72.

UK workplace pensions and SIPPs rest on Article 18(1) plus the Article 1(5)(a) carve-out, a clear textual basis for deferring in-fund growth. Questions remain fact-specific, including whether an arrangement is a "pension scheme" as the treaty defines it, and how the UK tax-free lump sum is treated given that Article 17(2) is not protected from the saving clause.

Australian superannuation is genuinely unsettled, and anyone telling you otherwise is overstating. The treaty has no accrual-deferral article, so the answer turns entirely on domestic characterization, and there is no IRS guidance directly on point. Practitioners take differing positions on whether a super fund is an employees' trust under §402(b), a foreign grantor trust, or something else, on whether Superannuation Guarantee employer contributions are currently taxable compensation, and on whether a given fund meets the Rev. Proc. 2020-17 conditions. The defensible approach is to analyze the specific fund and member circumstances, document the position taken, and be candid that reasonable practitioners disagree.

Bottom Line

Run the same four questions on any foreign plan, in any country: is the growth taxed as it accrues, does a treaty defer it and survive the saving clause, what must be reported, and how will distributions be taxed under §72 given the basis you built? Never assume the answer is deferral, and never assume a foreign pension is tax free in the US, because as a general rule it is not.

If you hold a foreign retirement account, recently became a US taxpayer under the substantial presence test, or suspect prior returns handled a foreign plan wrong, the fix is cheaper before the IRS raises it. Have questions about foreign pension US tax treatment? Contact TS CPA for a free consultation. We respond within the same day.

Official IRS and Government Sources

• IRS, The Taxation of Foreign Pension and Annuity Distributions
• Rev. Proc. 2014-55, Canadian Retirement Plans
• Rev. Proc. 2020-17, Tax-Favored Foreign Trusts
• US-UK Income Tax Convention
• IRC Section 402, Taxability of Beneficiary of Employees' Trust
• 31 CFR 1010.350, Reports of Foreign Financial Accounts
• IRS Tax Treaty Documents