For a US citizen living in Canada — or a former Canadian resident who has moved to the US — the RRSP is the one Canadian registered account the IRS broadly respects. The good news ends there. When the money finally comes out, both Canada and the US want their share, and the machinery for stopping that from becoming genuine double taxation is the foreign tax credit. Understanding how much of the withdrawal is US-taxable, and how the credit lines up against it, is what separates a clean result from a nasty surprise.
The treaty foundation
Under Article XVIII of the US–Canada tax treaty, an RRSP or RRIF is respected as a pension for a US person. That matters because it unlocks deferral: income and growth accruing inside the plan are not taxed by the US as they arise, only when distributed.
The mechanics have become simpler over the years. The old annual election on Form 8891 is gone. Since Rev. Proc. 2014-55, US persons receive automatic deferral of the inside build-up until distribution — no separate election is needed to keep the plan tax-deferred for US purposes. You still have to report the plan (more on that below), but you no longer have to elect into deferral each year.
What is US-taxable on withdrawal
Once you take a distribution, the deferral ends and the US wants its tax. The key idea is that the taxable amount is the distribution less your investment in the contract — your US tax basis. The basis portion comes out tax-free as a return of capital; everything else is ordinary income.
For most US persons who have been reporting under treaty deferral, the great majority of a distribution is taxable income, because the inside growth was never taxed on the way in. But basis can be meaningful in two common situations:
- Contributions made from already-US-taxed income. If you contributed to the RRSP while a US person and those contributions were not deductible for US purposes, they created US basis. That amount is recovered tax-free.
- A step-up on becoming a US resident. Where a Canadian resident becomes a US resident, a defensible treaty position can treat the plan’s value on the day US residency began as the starting basis, so that only post-arrival growth is US-taxable. This position is nuanced and fact-specific — document it carefully and take advice before relying on it.
Where basis exists, the taxable fraction of each withdrawal is generally basis-recovered pro rata rather than all at once. Good records of contributions and plan values are essential; without them, the IRS default is to treat the whole distribution as taxable.
The Canadian side: withholding tax
Canada taxes the withdrawal at source through non-resident withholding tax. The statutory rate is 25%, but the treaty reduces it to 15% for periodic pension payments. The distinction matters:
- Periodic payments — broadly, a RRIF drawn down within the annual limits — qualify for the 15% treaty rate.
- Lump-sum RRSP withdrawals are generally not periodic and suffer the full 25%.
This is why converting an RRSP to a RRIF and taking measured annual payments, rather than a single large redemption, is often the difference between a 15% and a 25% Canadian bite — and, as we will see, the difference between a credit that fully absorbs and one that strands.
Claiming the foreign tax credit
The Canadian withholding is a creditable foreign income tax. You report the distribution as income on Form 1040 and claim the credit on Form 1116.
Two technical points:
- Basket. Pension income generally falls in the general limitation basket. Because your US-source taxable income for the year may otherwise leave little room, the treaty’s re-sourcing rule can be used where needed to treat the pension as foreign-source, so the Form 1116 limitation does not choke the credit.
- Limitation. The credit is capped at the US tax attributable to that foreign income. If the Canadian rate exceeds your effective US rate on the same income, the excess cannot reduce US tax in the current year — it becomes a carryover (back one year, forward ten), which may or may not ever be used.
A worked example
Assume Maria, a US citizen resident in Canada, takes a CAD 40,000 RRIF payment (periodic, so 15% Canadian withholding). She has CAD 4,000 of US basis from non-deductible contributions made while a US person. For simplicity we work in Canadian dollars and assume her marginal US rate on this income is 22%.
| Item | Amount (CAD) |
|---|---|
| Gross RRIF withdrawal | 40,000 |
| Less: return of US basis (investment in contract) | (4,000) |
| US-taxable amount | 36,000 |
| Canadian withholding (15% of gross 40,000) | 6,000 |
| US tax before credit (22% × 36,000) | 7,920 |
| Foreign tax credit (lesser of CA tax paid / US tax on that income) | (6,000) |
| Residual US tax after credit | 1,920 |
Step by step:
- Canada withholds 15% of the gross CAD 40,000 = CAD 6,000. (Note Canada taxes the gross figure; it does not recognise Maria’s US basis.)
- US-taxable income is CAD 40,000 less CAD 4,000 basis = CAD 36,000.
- US tax before credit at 22% = CAD 7,920.
- The foreign tax credit is the CAD 6,000 actually paid to Canada (it is below the US tax on the income, so it is fully creditable).
- Residual US tax = 7,920 − 6,000 = CAD 1,920. Double taxation is largely eliminated; Maria simply tops up to her higher US rate.
Now change one fact. Suppose Maria instead took the CAD 40,000 as a lump-sum RRSP withdrawal, suffering 25% Canadian withholding = CAD 10,000. Her US tax on the CAD 36,000 is still CAD 7,920. The Form 1116 limitation caps the usable credit at roughly the US tax on that income — about CAD 7,920 — so around CAD 2,080 of Canadian tax strands as a carryover she may never absorb. The out-of-pocket cost of taking a lump sum rather than periodic payments is that stranded credit, not just a timing difference.
This is the general pattern: credits strand when the Canadian rate exceeds your US rate on the income, whether because the 25% lump-sum rate outruns your US bracket or because bracket and basis differences leave too little US tax to absorb the full Canadian amount.
Reporting obligations
Deferral and credits do not remove the reporting layer:
- Form 1040 — report the distribution as pension income.
- FBAR (FinCEN Form 114) — the RRSP/RRIF is a foreign financial account, reportable where the aggregate threshold is met.
- Form 8938 — report the account under FATCA where the applicable thresholds are exceeded.
Practical takeaways
- Track your US basis — non-deductible contributions and any documented step-up — because it is genuinely tax-free money and the IRS will not compute it for you.
- Prefer periodic RRIF payments over lump-sum RRSP redemptions where possible: 15% beats 25%, and it keeps the foreign tax credit from stranding.
- Coordinate the timing of withdrawals with the rest of your US income so the Form 1116 limitation leaves room for the credit.
- Keep the re-sourcing position in mind where your income is otherwise US-source, and take advice before relying on a treaty step-up in basis.
