UK Heir Inheriting a $400,000 Canadian RRSP in 2026: 25% Withholding Tax, the Canada-UK Tax Treaty Reduction, and How Much Actually Arrives

The Scenario: $400,000 RRSP, Ontario Deceased, UK-Resident Adult Child

Margaret, 76, widowed, Mississauga resident. She dies in February 2026. Her RRSP balance at the date of death: $400,000. Other income in 2026 before death: $60,000 (CPP at $18,000/year, OAS at $8,900/year, and a small defined-benefit pension of $33,100/year). Her only heir is her adult son James, who has lived in London, UK for the past 12 years. James earns £75,000/year as a project manager. No surviving spouse. No financially dependent child or grandchild.

Margaret named James as the direct beneficiary of the RRSP. The question: how much of the $400,000 actually reaches James's UK bank account after both countries take their share?

The answer depends almost entirely on one decision that James cannot control — how HMRC classifies the receipt. The swing is $80,000.

Step 1: The Canadian Terminal Return — $400,000 of RRSP Income

When a Canadian resident dies holding an RRSP with no surviving spouse or financially dependent child, section 146(8.8) of the Income Tax Act includes the full fair market value of the RRSP as income of the deceased on their terminal T1 return. Not the gain. Not the growth. The entire balance.

Margaret's terminal return looks like this:

At $410,000 of taxable income in Ontario, Margaret's terminal return is deep into the top bracket. Ontario's combined federal + provincial top marginal rate is 53.53% on income above approximately $253,000. The combined tax on the terminal return: approximately $165,000.

Step 2: The 25% Withholding — Part XIII of the ITA

When the RRSP custodian (the bank, brokerage, or insurance company holding the RRSP) pays the $400,000 to James in the UK, it does not send the full amount. Under Part XIII of the Income Tax Act, the custodian must withhold 25% of the gross payment to a non-resident and remit it to CRA.

The $100,000 withholding is not a separate tax on top of the terminal return income tax. It is an advance payment. CRA credits the $100,000 against Margaret's terminal return tax liability of ~$165,000. The estate owes the remaining ~$65,000 from Margaret's other assets (bank accounts, non-registered investments, etc.).

The custodian issues two forms:

• T4RSP — reports the $400,000 as RRSP income of the deceased. Filed with the terminal T1 return.
• NR4 — reports the $400,000 gross payment and $100,000 withholding to the non-resident recipient (James) and CRA. James needs this form to claim the foreign tax credit on his UK Self Assessment return.

Step 3: The Canada-UK Tax Treaty — No Rate Reduction on Lump Sums

Here is where UK heirs often expect relief and don't get it.

The Canada-United Kingdom Double Taxation Convention (Article 17) addresses pensions and annuities. It permits both countries to tax pension income, with double-taxation relief provided through foreign tax credits. But unlike some other Canadian tax treaties, the Canada-UK treaty does not provide a reduced withholding rate for RRSP lump-sum distributions.

For periodic pension payments (e.g., monthly RRIF withdrawals spread over years), the treaty framework can provide relief. But an RRSP deregistered at death is a single lump-sum payout of the full balance — and the treaty leaves Canada's domestic 25% rate intact for these payments.

Step 4: UK Tax — HMRC's Classification of the Receipt

This is the step that determines whether James keeps $300,000 or $220,000. And it hinges on a classification question: does HMRC treat the $300,000 received as taxable foreign pension income or as a non-taxable inheritance?

Scenario A: HMRC Treats It as a Non-Taxable Inheritance

If HMRC accepts that James is receiving an inheritance (a capital distribution from his late mother's estate), there is no UK income tax. The UK has inheritance tax (IHT) on estates — but IHT is levied on the estate, not the beneficiary, and Margaret's Canadian estate is outside UK IHT jurisdiction. James receives $300,000 and owes nothing further.

Scenario B: HMRC Treats It as Taxable Foreign Pension Income

A Canadian RRSP is not a UK-recognised pension scheme. HMRC's Pensions Tax Manual guidance indicates that lump sums from non-recognised foreign pension schemes may be taxable as foreign income. If HMRC applies this treatment:

At the higher rate (40%), James pays approximately $60,000 in additional UK tax. At the additional rate (45%), roughly $80,000. The foreign tax credit for the $100,000 Canadian withholding prevents full double taxation — but it does not eliminate the gap between Canada's 25% withholding rate and the UK's 40–45% marginal rate.

Best Case vs. Worst Case: How Much Actually Arrives in the UK

The $80,000 swing between best and worst case turns on a single question: how HMRC classifies the RRSP lump sum. James cannot control this — but he can (and should) get a ruling or written opinion from a UK tax advisor with cross-border Canada-UK experience before filing his Self Assessment return.

What the Executor Must Do Before Releasing RRSP Funds

The executor (or estate trustee) has specific obligations when an RRSP pays out to a non-resident beneficiary. Missing any of these creates CRA penalties or delays the payout to James by months.

1. Notify the RRSP custodian that the beneficiary is a non-resident. The custodian needs to know James is a UK resident to apply the correct Part XIII withholding rate (25%) rather than the domestic tiered rates (10/20/30%) that apply to Canadian-resident RRSP withdrawals.
2. Obtain a T4RSP slip from the custodian. This reports the $400,000 as RRSP income of the deceased. It is filed with Margaret's terminal T1 return.
3. Ensure the custodian issues an NR4 slip. The NR4 reports the gross payment ($400,000) and withholding ($100,000) to James and to CRA. James needs the NR4 to claim the foreign tax credit on his UK Self Assessment return. The NR4 filing deadline is March 31 of the year following the calendar year in which the payment was made.
4. File Margaret's terminal T1 return. Include the $400,000 RRSP income, claim the $100,000 withholding as tax paid, and pay the remaining balance. The terminal return is due by April 30 of the following year (or six months after death if death occurred between November 1 and December 31).
5. Obtain a clearance certificate from CRA before distributing all estate assets. Under section 159(2) of the ITA, the executor is personally liable for the deceased's tax debt if they distribute assets without a clearance certificate. CRA processing time: 4–6 months typically.

Comparison: What If James Were a US Resident Instead?

The brief asked for this comparison, and it's illuminating. If James lived in New York instead of London, the Canadian side would be identical — 25% withholding on the RRSP lump sum, same terminal return mechanics. The difference is on the receiving end.

A US heir in a no-income-tax state (Florida, Texas, Nevada) nets roughly $12,000 more than a UK heir at the 40% rate. A US heir in a high-tax state (California, New York) nets $28,000 less. The Canada-US treaty (Article XVIII) can reduce withholding to 15% on periodic pension payments — but RRSP lump sums at death typically face the full 25% regardless of treaty. The treaty framework is structurally similar; the dollar difference comes from domestic tax rates in the heir's home country.

Could This Have Been Structured Differently?

The $220,000–$300,000 range is a wide band on a $400,000 asset. Could Margaret have arranged things to improve the outcome for James?

Option 1: Draw Down the RRSP During Lifetime

If Margaret had converted the RRSP to a RRIF and taken larger-than-minimum withdrawals in her late 60s and early 70s (while her income was in a lower bracket), she could have reduced the RRSP balance before death. Each dollar withdrawn at a 30% marginal rate rather than a 53.53% rate saves roughly $0.24 in tax. On $200,000 of accelerated withdrawals: approximately $47,000 in tax savings over a decade. The withdrawn funds could have been reinvested in a TFSA ($7,000/year contribution room) or non-registered account. For the mechanics, see our inheritance tax planning guide.

Option 2: Leave the RRSP to a Canadian-Resident Beneficiary

If Margaret had a surviving spouse or a financially dependent child or grandchild who was a Canadian resident, the RRSP could have rolled over tax-free under sections 146(8.1) and 60(l) of the ITA. No terminal return income. No withholding. No UK tax complication. The rollover is the single most valuable estate planning lever for RRSPs — and it is completely unavailable when the beneficiary is a non-resident with no Canadian registered account to receive the transfer.

Option 3: Structure as Periodic Payments (Not a Lump Sum)

If the RRSP had been converted to a RRIF before death and the estate could arrange for periodic payments to James over several years (rather than a single lump sum), the withholding rate on periodic pension payments to non-residents can be different under the treaty framework. In practice, this is difficult to execute after death — the RRSP/RRIF typically deregisters and pays out as a lump sum. But it is worth exploring with a cross-border estate lawyer if the amounts are large enough to justify the structuring costs.

The “No Inheritance Tax in Canada” Myth — Cross-Border Edition

Canada has no formal inheritance tax. But a $400,000 RRSP inherited by a UK-resident child generates:

• ~$165,000 in Canadian income tax on the terminal return (paid by the estate)
• $100,000 withheld from the payout under Part XIII (credited against the terminal tax)
• $0–$80,000 in UK income tax (paid by the heir, depending on HMRC classification)

Total tax across both countries: $165,000–$245,000 on a $400,000 asset. That is an effective combined rate of 41–61%. The “no inheritance tax” label is technically correct and practically meaningless when you add the deemed-disposition income tax, the non-resident withholding, and the UK tax layer. For the broader framework of how Canada taxes estates, see our non-resident heir withholding tax guide.

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