RSUs taxed at vesting — plan for the bill
Restricted Stock Units in Canada are treated as employment income at vesting, which creates a tax bill even if you don’t sell shares — a trap several engineers warned can strain mortgage or cashflow plans argued. Media and web briefs repeat the squeeze: use registered accounts and sell-to-cover strategies because withholding may not cover actual taxes in high‑income years reported.
Ontario's top combined federal-plus-provincial marginal tax rate reaches 53.53% for taxable income above $258,482 in 2026. ey.com Employers commonly satisfy withholding on vested RSUs using sell‑to‑cover or net‑share issuance mechanisms, which convert shares to cash for remittance rather than withholding an exact marginal‑rate amount. dlapiper.com Example math used by Canadian advisers: 100 RSUs vesting at $30 creates a $3,000 employment‑income benefit to report, while payroll withholding rules determine how much cash is remitted at that time. rivers-wealth.com If the tax owing net of source deductions exceeds $3,000 in either the current year or either of the two previous years, the CRA requires instalment payments and interest can apply if instalments are missed. canada.ca Two registered‑account levers most cited by Canadian CPAs are RRSP deductions (2026 dollar cap $33,810) to lower taxable income at vesting and TFSA space (2026 annual limit $7,000) to shelter proceeds after a sale. canada.ca RRSP timing matters because the deadline to contribute for the 2025 tax year is March 2, 2026, which is often used to offset large 2025 vesting events reported on a 2025 T4. canada.ca Mortgage underwriters frequently demand documentation and a multi‑year track record before counting RSU income—many lenders ask for two years of history, employer verification and vesting schedules when assessing affordability. bpfund.com Practical payroll options include asking payroll/HR to increase tax withheld at source (the CRA documents the process for increasing deductions) or using the CRA instalment calculation options to send quarterly payments. canada.ca
