Posted: Wed Aug 20, 2008 9:45 am-
3) A lot for this kind of thing.
1) Hard to say, don't know what kind of corporation you're using, where the corporation is (hence the rate) and I don't know off-hand what the NY corporate rate is.
2) Of course you do (as with all other income), on the corporation's T2 return, the corporation also has to file an 1120-F non-resident corporation tax return in the US to report US-source income (and possibly something similar in NY State) and pay tax on that income in the US. Also must claim a tax treaty position on Form 8833 to avoid US non-resident withholding tax (this is very important to do otherwise your client can end up in a mess with the IRS for not doing the withholding).
US corporate income tax rates are far higher than the CCPC rates in Canada, but the Canadian corporation can claim a foreign tax credit up to the CCPC rate on T2 schedule 21.
Your personal income from the corporation in Canada isn't that big of a deal as it still comes from a Canadian-resident corporation so essentially it all works the same as you are also a Canadian resident.
If you own a CCPC, DO NOT move your personal tax home to the US otherwise the CCPC reverts to being a normal corporation and gets hit with normal corporate tax rates, plus you personally will get hit with departure tax. If you plan on moving to the US it's a very tricky thing to do tax-wise if you own a CCPC.
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Steve.