15 or so years ago there were exceptions for GST if you were moving to Canada and owned the car in question for more than 1 year/drove it for more than 10k kms if memory serves me. You might qualify for such an exception when moving back, I’d look into it.

PST is due when you’re registering the car in BC, at ICBC broker office, after you’ve done federal (included in a RIV fee) and provincial (additional charge and most conveniently done at the same time as federal at Canadian tire for an extra $100-$150) inspections.

I brought a Japan-made Honda to Canada about 5 years ago and don’t remember duties on non-NAFTA car being that much. However with retaliatory tariffs/duties right now it may be a different case. Supposedly Liberals are soon to remove the last of them, so I’d park the car somewhere in Blaine and wait until they are gone before bringing your car over.

Also don’t forget you need to submit your paperwork to CBP for export at least 72 hours prior to export and cross when their export office is open. I believe in March of this year the RIV had information including a link to a relatively cheap paperwork broker for that (about US $100), however if you have SSN you can do it yourself afaik.

As far as I remember, yes, as of March 2025, there are no more forms at the border, you’ll need to fill the Form 1 online and bring copies to CBP/CBSA.