When you invest in a non-registered account, you need to be concerned about more than just your funds’ performance: you also need to know how much of your return will be eaten up by taxes. Unfortunately, while regulators are strict about the way ETFs and mutual funds report performance, fund companies in Canada have no obligation to estimate after-tax returns—something that’s been required in the US since 2001.
To help address this problem, Justin Bender spent the last several months creating a calculator for estimating the after-tax returns on Canadian ETFs. He was inspired by Morningstar’s US methodology, but he made many significant changes to adapt it for Canada. The new methodology is fully explained in our latest white paper, After-Tax Returns: How to estimate the impact of taxes on ETF performance. We have also made our spreadsheet available for free download so DIY investors can experiment on their own. (The spreadsheet is protected so the formulas cannot be altered. However, we have included detailed descriptions of these formulas in the appendix to the white paper.)
The methodology is quite complex, but here’s an overview in plain English:
We begin by recording the ex-dividend dates for all the cash distributions an ETF made during the period being considered.