Yup, you are right @justinline! Filing 1040NR and claiming back from US is the approach.Actually this position CRA is taking is not recent one, even before Covid, I heard cases where CRA was not giving full credit of the taxes remitted to IRS, if they determine you are more of a remote worker. The question here is not who taxes you first rather who gets to collect all or the majority of taxes.
If you are daily traveller, you are are fine, you still file with IRS and then claim that as foreign tax credit in your CRA filling. But if you are more of a remote worker, this will be increasingly challenging. I say increasingly because, I personally know few cases who have done this in past without any issues.
Have you explored W8BEN
What Is a W-8BEN Form? (velocityglobal.com)
Basically that reduces withholding or create exemptions, then you remit that to CRA instead of IRS. Now if you already paid taxes as remote worker to IRS, you have to claim that back then remit to CRA. little more complicated.
US employer may be reluctant as well, because then they enter into employer-employee relationship with someone who is residing in a foreign country, besides taxes there are other consequences.
Best is to convert to contractor and not remain full time employee, saves every one headache, if you are planning to be fully remote.
The only lingering question is:
CRA mandates that all non-resident employers withhold CPP/EI and remit it to CRA for Resident and Non-Resident Canadians. (There are some exceptions to the Non-Residents but it is capped at 45 days so lets ignore it for now)
Link
Daily commuters fail the Substantial Presence Test because commuting days are not counted in USA. Hence, commuters are also US Non Residents and Canadian Tax Residents. As per CRA ruling, their employers should withhold Canadian Payroll Deductions as long as commuters are Canadian Tax Residents. (Obviously, remote workers have the same issue)
So technically, commuters should also have to have their employers withhold Canadian Payroll deductions simply because they are Canadian Tax Residents, right?
I am planning on being a fully remote worker on H1B from Canada beginning Jan 2025 (currently ensuring the legality before I make the move). The taxes were resolved after talking to CPA, (idea of clawing back from IRS seems complex but with professional help, seems doable)
The only legitimate concern is Payroll Deductions. This ruling affects not only remote workers but also commuters.
Any thoughts?
What if the remote worker commutes 1 week out of every 4 weeks to US location?
Assume a remote worker manages to file taxes without FTC, how to navigate the CPP/EI issue?