Should I withdraw my RRSP as a lump sum or periodic RRIF payments after moving to the US?

For most people, the periodic route wins. Convert the RRSP to a RRIF and keep each year’s withdrawals inside the treaty’s periodic ceiling, and Canada withholds 15% instead of the 25% it takes on a lump-sum RRSP withdrawal. On a $300,000 balance that’s a $30,000 difference over a full drawdown. The lump sum still makes sense when you need the money now or the balance is small.

What does Canada withhold when a US resident pulls money out of an RRSP?

25%. Once you’ve become a US resident, section 212(1) of the Income Tax Act charges a 25% Canadian tax on most amounts paid to you from Canada, and paragraph 212(1)(l) puts RRSP payments squarely inside that rule. The institution holds the tax back before the money reaches you.

That rate has nothing to do with your income level. It applies whether you pull a little or the whole account, and it’s Canada’s default answer any time the treaty doesn’t say otherwise. Your RRSP itself made the move with you intact, since RRSPs are not part of the deemed sale when you leave. The question is what happens when you start drawing it down.

When does the treaty cut the rate to 15%?

When the payment counts as a periodic pension payment. Article XVIII(2)(a) of the US-Canada tax treaty lets Canada tax pensions that arise there, but caps the tax at 15% of the gross amount when a US resident is the beneficial owner of a periodic pension payment.

So the whole decision compresses into one word: periodic. The treaty doesn’t define it. Canada does, in its own statute, and that definition is where the lump-sum-versus-RRIF split lives.

What counts as a “periodic” payment?

Canada answers this in the Income Tax Conventions Interpretation Act, section 5. A payment out of an RRSP before maturity, or a full or partial commutation of it, is excluded from “periodic pension payment” outright. A lump-sum RRSP withdrawal can never qualify for the 15% rate, no matter how you time it.

RRIF withdrawals do qualify, up to a ceiling. Your year’s total RRIF payments stay periodic as long as they don’t exceed the greater of twice the RRIF minimum for the year and 10% of the fund’s fair market value at the start of the year. Anything above that ceiling falls back to the 25% default.

That’s why the standard play is a conversion: roll the RRSP into a RRIF, then keep each year’s withdrawals inside the ceiling. Here’s the side-by-side:

	Lump-sum RRSP withdrawal	Periodic RRIF withdrawals
Canadian withholding	25% under ITA s.212(1)	15% inside the ceiling, under treaty Article XVIII(2)(a)
Counts as “periodic” under ITCIA s.5	Never; RRSP payments are excluded outright	Yes, up to the greater of 2x the RRIF minimum and 10% of the January 1 value
Access to the money	Everything at once	Spread over years, with the ceiling recalculated each January 1
US side of it	The whole balance lands on one year’s Form 1040	Income and foreign tax credits spread across years
Tends to suit	Money with an immediate job, or a small balance	A larger balance you don’t need all at once

What happens on the US side of the same withdrawal?

The IRS taxes it too. As a US resident you report the withdrawal on your Form 1040, though Article XVIII(1) of the treaty caps the amount you include at what you’d have included if you were still a Canadian resident.

You don’t lose the Canadian withholding. You claim it as a foreign tax credit on Form 1116, and the credit offsets US tax on that same income. The catch is the limitation: the credit in a given year can’t exceed the US tax attributable to the foreign income, so a 25% withholding on a large lump sum doesn’t always come back dollar for dollar.

Timing matters here as much as the rate. A lump sum stacks the entire balance into a single US tax year, and a bigger single-year income means more of it taxed in your top brackets. Periodic withdrawals spread the income, and the credits, across years where they’re easier to absorb.

What does the math look like over ten years?

When is the lump sum still the right call?

When the money has a job. If the balance is funding a house down payment or clearing debt that costs you more than the tax spread saves, waiting ten years for a better withholding rate can be the wrong trade. And on a small balance, the dollar difference between 15% and 25% may be too small to justify years of keeping a Canadian account open.

There’s also the credit position. If your US tax on the income is high enough that the full 25% gets absorbed as a foreign tax credit anyway, the withholding delta matters less than it looks on paper. That’s a per-file calculation, and it’s exactly the kind of thing worth checking before you touch the account.

What should I do next?

If the move hasn’t happened yet, deal with the departure-year mechanics before this decision exists; the RRSP question comes second. If you’re already in the US, map the RRSP-to-RRIF conversion and the ceiling for your balance before anything moves, then get a read on your US bracket and state picture for the years you’d be drawing.

Neither is hard, and both are cheaper before the money moves than after.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.