Posted: Mon Sep 01, 2008 11:20 am-
You tell them on your T1 that you are non-resident. There's a check box on the front. If you still have Canadian source income that must be reported after that, you file a non-resident T1. However you must cut all residential ties to Canada in order to be able to do this, Form NR-73 lists them.
Unlike some other countries, there aren't really many reasons to keep your tax home in Canada if you move to the UK, the only reasons I can think of off-hand is if you're there for less than a full calendar year or if you have assets in a third country which would make it complicated to do.
Or the most obvious one - you pay less tax keeping your tax home as Canada, but that's a very fine calculation compared to some other countries. If you work for a Canadian employer in the UK in most cases you will pay less tax, because you will pay the combination of CPP and UK income tax which is obviously going to be less than paying NI on it.
I can think of other situations too but it depends on your personal situation really. E.g. if your UK employer has a Canadian operation and can route your pay to you that way and you're in a lower tax bracket in Canada.
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Steve.