VUN vs XUU vs ITOT 2026: Which US Total Market ETF Should Canadians Own?
VUN, XUU, and ITOT all give you the entire US stock market - roughly 3,500 names from Apple down to the smallest listed micro-cap. But one is a Vanguard wrapper around VTI, one is a BlackRock fund-of-funds trading in Canadian dollars, and the third is a US-listed ETF that costs a quarter of what the Canadian versions do. Here is how to pick the right one for 2026 without over-paying on fees, FX, or the US dividend withholding tax.
What each ETF actually holds
VUN (Vanguard U.S. Total Market Index ETF) is a Canadian-listed wrapper that holds exactly one thing: the US-listed VTI. That means your VUN exposure is identical to Vanguard's $400B+ Total Stock Market ETF, re-ticketed and re-priced in Canadian dollars. You get around 3,900 US stocks, from Apple at the top to micro-caps that most investors have never heard of. Trades on the TSX in CAD, unhedged.
XUU (iShares Core S&P U.S. Total Market Index ETF) is a BlackRock fund-of-funds that holds a basket of US-listed iShares ETFs (ITOT, IVV, IJH, IJR) to replicate the S&P U.S. Total Market Index. You end up with about 3,600 US stocks and virtually identical exposure to VUN, with the same unhedged CAD/USD mechanics. Trades on the TSX in CAD.
ITOT (iShares Core S&P Total U.S. Stock Market ETF) is the US-listed cousin of XUU - in fact, XUU holds ITOT as its largest building block. You buy it on the NYSE in US dollars, which means you need USD inside your account to purchase it (Norbert's Gambit or a USD-funded transfer). Same ~3,600 S&P Total Market stocks, but at a US-listed MER.
Head-to-head: fees, structure, and tax
| Metric | VUN | XUU | ITOT |
|---|---|---|---|
| Issuer | Vanguard Canada | iShares (BlackRock Canada) | iShares (BlackRock US) |
| Listed on | TSX (CAD) | TSX (CAD) | NYSE Arca (USD) |
| Benchmark index | CRSP US Total Market | S&P U.S. Total Market | S&P Total Market |
| Holdings count | ~3,900 | ~3,600 | ~3,600 |
| Management fee | 0.16% | 0.07% | 0.03% |
| MER (all-in) | ~0.17% | ~0.07% | ~0.03% |
| Structure | Holds VTI (wrapper) | Fund of iShares US ETFs | Direct US stocks |
| Distribution yield | ~1.2% | ~1.2% | ~1.2% |
| Distribution frequency | Quarterly | Semi-annual | Quarterly |
| AUM (approx) | CAD $12B+ | CAD $4.5B+ | USD $55B+ |
| Launched | 2013 | 2015 | 2004 |
| US withholding on dividends | 15% at VTI level + 0% at RRSP | 15% at underlying + 0% at RRSP | 0% in RRSP (treaty), 15% elsewhere |
On a $100,000 position held for 20 years, the MER gap compounds into real money. XUU's 10 basis point edge over VUN saves roughly $2,500 over two decades. ITOT's 14 basis point edge over XUU saves another $3,500. Those numbers assume the gap stays constant - in reality Vanguard and iShares have cut MERs several times over the last decade, so expect more compression.
The US dividend withholding tax trap
The US charges a 15% withholding tax on dividends paid to Canadian residents. The treaty between Canada and the US waives this tax, but only when the US-listed security is held inside an RRSP (or RRIF). This is where VUN, XUU, and ITOT diverge in meaningful ways once you look past the headline MER.
VUN and XUU are Canadian-listed, so the 15% withholding tax is applied inside the fund (at the VTI or ITOT holding level) and you cannot recover it, even in an RRSP. ITOT held directly inside an RRSP escapes this withholding entirely under the treaty. On a 1.2% dividend yield, the recoverable 15% is roughly 18 bps per year - meaningful on top of the MER gap.
When each one wins
Canadian-listed (VUN or XUU)
- No FX conversion needed, buy with existing CAD
- TFSA, FHSA, RESP eligible without weird workarounds
- Simple T3 slip at tax time, no US tax forms
- Pay 15% US withholding inside the fund in every account
- XUU wins on pure MER (0.07% vs VUN 0.17%)
US-listed (ITOT)
- Lowest MER by a wide margin (0.03%)
- Zero US withholding in RRSP (Canada-US treaty)
- Must hold USD, convert via Norbert's Gambit for low cost
- In TFSA/FHSA the treaty does not apply - still pay 15%
- Larger USD cash drag if your contribution flow is CAD
Account placement playbook
- RRSP (CAD-funded): XUU is the clean default. 0.07% MER, no FX hassle, and you lose the US withholding either way inside a Canadian wrapper. VUN is fine too if you already own it - a 10 bp swap is not worth the capital gains trigger.
- RRSP (USD-funded via Norbert's Gambit): ITOT wins. 0.03% MER plus full US dividend withholding tax recovery under the Canada-US treaty. On $100K over 20 years that is roughly $8,000-$10,000 extra in your account versus XUU.
- TFSA or FHSA: XUU almost always. The treaty does not apply inside a TFSA, so ITOT loses its tax edge and the Norbert's Gambit mechanics are messier. Stick with Canadian-listed.
- Non-registered (taxable): XUU or VUN. US dividend withholding is lost either way, and the Canadian ETF simplifies T3/T5 slips. Avoid ITOT in non-registered unless you are already deep in US dollars.
- RESP: XUU. Family RESPs cannot easily hold USD for all beneficiaries, and the kids' withdrawal years are too close to risk FX friction.
PICK IN 60 SECONDS
- You contribute mostly in CAD and your account is TFSA, FHSA, RESP, or taxable: XUU.
- You already own VUN in a registered account: keep it. The 10 bp MER saving is not worth the capital-gains trigger (if non-registered) or the swap complexity.
- You contribute in USD, your account is an RRSP, and you can clear Norbert's Gambit cleanly: ITOT. The treaty recovery alone pays for the switch.
- You want the S&P 500 only, not the full market: skip all three and look at VFV, XUS, or VOO instead.
- You hate currency conversion of any kind and want zero mental overhead: XUU and stop reading comparison articles.
Why XUU is cheaper than VUN
The 10 bp gap is not an accident of competition - it comes from the underlying structure. VUN holds exactly one US ETF (VTI, 0.03% MER) and Vanguard Canada adds a 0.14% overlay fee. XUU holds four US iShares ETFs weighted to replicate the S&P Total Market, which Vanguard Canada cannot do with a single wrapper, and BlackRock Canada charges just 0.04% on top of the underlying 0.03%. So the Canadian overlay is 14 bps at Vanguard versus 4 bps at iShares - a direct policy choice by each issuer.
Frequently asked questions
Is VUN or XUU better in 2026?
For most Canadian investors, XUU is better on cost (0.07% MER vs VUN's 0.17%) with virtually identical US total-market exposure. VUN tracks the CRSP US Total Market Index via Vanguard's VTI, while XUU tracks the S&P U.S. Total Market Index via a basket of iShares ETFs - the two indexes have more than 99% overlap in practice. If you already own VUN inside a registered account, the switching cost is zero and the 10 bp saving is real; in a taxable account, weigh any capital-gains trigger against the 10 bp annual saving before switching.
Why is ITOT so much cheaper than XUU if XUU just holds ITOT?
XUU is a Canadian-listed wrapper that holds US-listed iShares ETFs (ITOT being the largest piece). BlackRock Canada charges an additional 0.04% overlay fee to operate the Canadian fund - handle the TSX listing, the CAD trading, the Canadian tax paperwork, and the fund-of-funds mechanics. ITOT, held directly on NYSE Arca, skips that overlay entirely. The trade-off is you need USD inside your account to buy ITOT.
Should I hold ITOT inside my TFSA?
Usually no. The Canada-US tax treaty exempts US dividends from the 15% withholding tax only inside an RRSP or RRIF, not a TFSA, FHSA, or RESP. Holding ITOT inside a TFSA means you still lose 15% of the dividend yield (roughly 18 bps a year) to the IRS, which almost wipes out the MER advantage over XUU. Keep ITOT for RRSPs and use XUU everywhere else.
What is the US withholding tax savings on ITOT in an RRSP worth?
ITOT's dividend yield is roughly 1.2% in 2026. The 15% US withholding tax waived under the treaty inside an RRSP saves you 15% x 1.2% = 18 basis points per year, on top of the 4-10 bp MER gap versus XUU and VUN. Over 20 years on a $100,000 RRSP position, that treaty saving alone compounds to roughly $5,500 to $8,500 in your pocket depending on returns.
Can I own ITOT in Questrade or Wealthsimple Trade?
Yes. Both support US-listed ETFs across RRSP and non-registered accounts. Questrade supports USD on both sides, so a Norbert's Gambit through DLR.TO/DLR.U.TO is clean. Wealthsimple Trade has free USD accounts on paid plans and auto-conversion on the free tier (at an FX fee), so if you are on the free tier the FX cost usually makes XUU the better choice.
VUN vs XUU vs VFV - which should I pick as my US equity core?
VFV holds the S&P 500 (500 names, mostly large-cap), while VUN and XUU hold the total US market (~3,600 names, including mid and small-caps). The S&P 500 has outperformed the total market by a small margin over the last 10-15 years because large-cap US tech dominated, but the long-run case for owning smaller companies is diversification and a slight small-cap premium. If you want the simplest, cheapest exposure, XUU (total market) or VFV (S&P 500) are both defensible - pick one, do not stack them.