by Little Ash on Thu Mar 01, 2012 1:04 pm
Bob
I am not a taxation specialist (rather a normal punter in a similar situation to yourself) so I would suggest you will have to work out the official line via a combination of advice from Skatteetaten (Norwegian tax authorities) + a qualified accountant/tax specialist with experience in dealing with similar situations and the associated Double Tax Treaty.
On the face of it there appears to be 2 separate issues here. Firstly your personal taxation, then the tax position of your UK Ltd company.
As you say your personal tax situation will presumably be decided according to the 183-day rule. As far as I am aware once you are deemed to be tax resident in Norway, your UK employer will then be obliged to pay withholding tax to the Norwegian tax authorities, not HMRC. In addition, if you will be paying national insurance in Norway rather than UK (which probably makes sense if you plan to live in Norway in the long term), then your employer will also have to pay its employer's NI contributions to Norway. The rate in Norway for employer's contributions is currently 14.1%, which I believe is higher than the current UK rate.
The tax situation of your UK Ltd company is difficult to determine from the info you have posted. It sounds like you are an owner with a shareholding in the company. If the company's sole client is based in Norway, then I would've thought that the company would also be viewed as fully tax resident in Norway and therefore subject to Norwegian company tax rules. If you are living in Norway to fulfil a contract to a Norwegian client who is just one of many other clients (the rest of whom are not based in Norway), then I believe that only the proportion of the company's profits that are attributable to the Norwegian client would be subject to Norwegian tax. But as I say, I am not a tax expert, so you really need to get some professional advice on this aspect as the company's tax position will have a material impact on the amount of tax it has to pay.
Not sure if any of this helps or whether I have understood your situation correctly but pls feel free to post more if you wish to discuss further.