Posted: Mon Aug 04, 2008 10:20 am-
The only thread on here that deals with this subject is:
http://www.canuckabroad.com/forums/love-first-b...s-too-vt3976.html
The Canadian corp. needs to claim a tax treaty position with the US client (I think this is Form 8233 but I'm not sure for corporations). This stops them from having to do foreign withholding of 30% on Form 1042. (They can optionally file nil returns with the IRS which can help them if they ever get audited).
Then the corporation just bills the client as per usual. The corporation files Form 1120-F at the end of the financial year, and must pay US corporation tax (check the IRS website for marginal rates) on US source net income, i.e. after you have claimed any valid US expenses (usually salary) - have a look at the instructions for Form 1120-F. The corporation must also file Form 8833 to claim the tax treaty provision so it is only taxed on US-source income.
Declare any tax paid by the corporation on T2 Schedule 21 and use this to claim a foreign tax credit in Canada when the T2 is filed. Bear in mind on a CCPC the tax rate is usually far lower than in the US, so you will be unlikely to claim all the tax as a cost, it will only be a partial credit. So obviously maximise your US costs (salary) as much as you can to avoid US corporation tax.
As you are a Canadian employee of a Canadian corporation, that should be pretty much it. If you separately receive income personally in the US you may also need to file a 1040NR and a Form 8840 or 8833.
DO NOT file a regular 1040. You will seriously regret it.
The tax treaty has just changed and provisions relating to foreign contractors have also changed but I'm not sure if it matters if it's done via a corporation. However, I STRONGLY recommend phoning the IRS or talking to an accountant who is very familiar with this sort of thing prior to filling in Form 8833 and 8233. It's extremely important that the tax treaty claim is made correctly and given that the treaty has just changed it's unlikely you will find the correct information on the web as the IRS hasn't even updated publication 597 yet.
Tax treaty claims have to be made by June 15th, but I think for corporations it depends on the financial year end, so that's an advantage when using a corporation.
To be honest I'm not sure you need an EIN because you're paid in Canada, you have no US employees (might help ID the corp with the IRS on the tax return though). TN-1 is for "temporary workers" so no problem there. Probably help you to have a copy of a T1 for TN-1 status anyway.
Don't move your tax home to the US, it will affect CCPC status and lead to lots of nasty consequences as explained in the other thread.
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Steve.