How are foreign pensions taxed in the US?

Foreign pension taxation in the US is one of the most complex areas of cross-border tax. The treatment depends on the type of pension, the country where it was earned, whether a tax treaty applies, and how the pension is structured under US tax law.

In general, distributions from foreign pension plans are taxable as ordinary income on your US tax return, similar to domestic pension distributions. However, the timing and extent of taxation can vary significantly. If your contributions to the pension were made with after-tax money (no tax deduction was claimed in the US), you may have a tax basis that reduces the taxable portion of distributions.

Many foreign pensions present a problem because they may be treated as foreign trusts for US tax purposes. If so, annual reporting on Form 3520 and 3520-A may be required, with penalties of the greater of $10,000 or 35% of the gross reportable amount for failure to file. This treatment is particularly common with pension plans from countries without a specific treaty provision addressing pensions.

Tax treaties can provide significant relief. Many US tax treaties contain provisions that either: tax pension distributions only in the country of residence, reduce the tax rate on pension distributions, or defer US taxation on pension income accruing within the plan. The US-Canada treaty, for example, allows RRSPs to grow tax-deferred for US purposes if you make the proper election.

Specific pension types and their treatment include: Canadian RRSP/RRIF (treaty deferral available), UK personal pensions (potentially treated as foreign trusts), Australian superannuation (complex, potentially PFIC issues), government pensions (often taxed only by the paying country under treaty), and social security pensions from foreign countries (may be partially or fully exempt under treaty).

Foreign pensions may also be reportable on FBAR and Form 8938. Given the complexity, we strongly recommend working with a specialist who understands both the US tax treatment and the specific pension rules of your country.