Which Investments Go in Which Account?
Interest-bearing assets belong in registered accounts, because interest is taxed at your full marginal rate and receives no credit or inclusion discount. Canadian dividend payers belong in non-registered accounts, because the dividend tax credit is worthless anywhere else.
- The answer:: Shelter the income taxed most heavily. Interest is fully taxable; capital gains are half-included; eligible dividends carry a credit.
- The trap:: Holding United States dividend payers in a TFSA. The treaty exemption applies to an RRSP and not to a TFSA, so withholding is lost outright.
- The recommendation:: Decide location after the asset mix, never before, because a tax-efficient portfolio with the wrong holdings is still the wrong portfolio.
Where the AI summary above gets this wrong
"Put your highest-growth investments in your TFSA."
That's surface-true. Here's what it misses:
- Growth is not the only variable — How the return is taxed outside the shelter matters as much as how large it is. Interest is taxed most heavily and benefits most from shelter.
- The treaty distinguishes RRSPs from TFSAs — United States withholding on dividends is waived inside an RRSP under the treaty, and is not waived inside a TFSA.
- The credit disappears inside a shelter — Canadian eligible dividends carry a tax credit that has no effect inside a registered account, so the benefit is wasted there.
01 Why interest goes inside
Interest income is taxed at your full marginal rate with no credit and no partial inclusion. Capital gains are half-included, and eligible Canadian dividends carry a credit that can make their effective rate very low.
Sheltering the most heavily taxed income therefore delivers the largest benefit, which puts bonds and guaranteed investments inside registered accounts ahead of equities. The rate comparison is in interest versus capital gains.
02 What the treaty does and does not cover
The Canada-United States treaty waives withholding on United States dividends paid into an RRSP or RRIF, treating them as pension accounts. A TFSA is not covered, so the withholding applies and cannot be recovered, because there is no Canadian tax against which to claim a foreign credit.
That makes a TFSA the wrong place for United States dividend payers held directly, and the cost is the same for a United States-listed fund held there. The wider drag is set out in foreign withholding tax.
Shows: what an amount becomes after your chosen number of years at a fixed return. Ignores: tax, fees, inflation, and any variation in returns from year to year.
03 Where the theory stops
Location is a second-order decision. It improves after-tax return without changing risk, which makes it genuinely valuable, but it cannot rescue a portfolio holding the wrong assets or paying too much for them.
Rebalancing across accounts also becomes harder once location is optimised, because selling to rebalance in a non-registered account realises gains. Doing the rebalancing inside registered accounts wherever possible is the usual answer.
It is also a decision to revisit rather than to set once. Contribution room accumulates unevenly, a RRIF minimum starts drawing one account down while a TFSA keeps growing, and an inheritance or a commuted value can arrive and change the proportions overnight. A location plan built for one set of balances stops fitting as those balances move apart.
Asset location gets treated as an advanced technique and it is really just a sorting exercise. Put the income the tax system punishes hardest where the tax system cannot reach it. Everything else is a refinement on that one sentence.
FAQ
Which investments should go in a TFSA?
Assets whose income would otherwise be taxed heavily and which do not lose a benefit by being sheltered. United States dividend payers are a poor fit, because treaty relief on withholding does not extend to a TFSA.
Should bonds go in a registered account?
Generally yes. Interest is taxed at your full marginal rate with no credit or partial inclusion, so it benefits most from being sheltered.
Why not hold Canadian dividend stocks in an RRSP?
The dividend tax credit has no effect inside a registered account, so its benefit is wasted. Canadian dividend payers generally belong in a non-registered account.
Sources
Regulator references
- Federal dividend tax credit (line 40425) · Canada Revenue Agency · 2025The gross-up and dividend tax credit mechanism for eligible dividends.Last verified: 2026-09-07
- Interest and other investment income (line 12100) · Canada Revenue Agency · 2025That interest is included in income in full, unlike capital gains or eligible dividends.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.