Back in the fall of 2012, I wrote a pair of blog posts about the impact of foreign withholding taxes in US and international equity funds. The first explained the general idea of this tax on foreign dividends, while the second showed which funds are best held in which types of account (RRSP, TFSA, non-registered). This is a complicated and confusing topic, so I was surprised at the enormous interest these articles generated from readers, the media, advisors and even the ETF providers themselves.
What was missing from those articles, however, was hard numbers: it’s one thing to say this fund is more tax-efficient than that one, but by how much? To my knowledge no one has ever quantified the costs of foreign withholding tax in a comprehensive way—until now. Justin Bender and I have done this in our new white paper, Foreign Withholding Taxes: How to estimate the hidden tax drag on US and international equity index funds and ETFs.
The factors that matter
The amount of foreign withholding tax payable depends on two important factors. The first is the structure of the ETF or mutual fund.