US citizen sometimes residing in spain, wanting to offer consulting services in Europe, TAXES?
With something this complicated you are going to want to consult professionals. Either a professional with international experience, who will tell you the best tax arrangement overall but might come expensive, or one professional in each country who will optimize for that country. You will have to pay US taxes, and depending on your residency probably some in Spain. Double tax agreements should kick in to prevent you paying tax on the same money twice. You do not have to pay separate 'European' taxes. If you do substantial business in another country you might have to pay there, but one of your professionals should sort it out.
As an individual freelancer, you would need to maintain a book of accounts. This should show all the income you are getting, and should also list all the payments incurred. This can not only include the payments to other professionals, but also any hardware purchased, phone bills, any travel and entertainment bills directly related to the service you are offering.  Once you arrive at a net profit figure, you would need to file this as your income.  Consult a tax professional and he can help with how to keep the records of income and expenses. i.e. You would need to create invoices for payments, use checks or online transfers for most payments, segregate the accounts, one account used for this professional stuff, and another for your personal stuff, etc. In a normal course the Income Tax Department does not ask for these records, however whenever your tax returns get scrutinized on a random basis, they would ask for all the relevant documentations. This answer applies only to corporation tax, not income tax.  Different things, income tax is much higher.  12.5% is the low rate for corporation tax.  The standard rate is 25%.  Or if you're Apple 0%.   Like many countries Ireland will only consider you eligible for the low rate of corporation tax if you (your Irish company) can demonstrably prove yourself resident in Ireland.  This is more than just address, and you must be able to evidence that your staff work there, your directors are both European Economic Area citizens and have their board meetings in Ireland, and most importantly that they run the company from Ireland, etc.  If you're a one man corporation, unless you want to live in Ireland, it's not going to work.   Referring to the Irish government's website:  The term 'residence' was not, until recently, defined in law. The   general rule was that companies, whose 'central management and   control' was exercised in the State, were treated as resident here.   This rule or test emerged as a result of judicial decisions set down   in case law. Factors to be taken into account in establishing where   the company's central management and control lie include, for example,   where the important questions of company policy are determined, where   the majority of directors reside, where the negotiation of major   contracts is undertaken and where the company's head office is   located. Long story short:  An Irish incorporated company is not treated as Irish resident for tax   purposes if it is a 'relevant company' ... A Relevant Company is a   company that ... is ultimately controlled by persons resident in the   EU or in a country with which Ireland has concluded a double taxation   treaty Canada doesn't tax non-residents on income earned/incurred outside of Canada. So, your sister should start with this page to determine the residency status. If she is indeed determined to be non-resident - she should look here to see her obligations. If all she earns she earns outside of Canada - her obligations will be very little, if at all. This is similar to almost any other country in the world, with the notable exception of the United States of America. US citizens are taxed regardless of their residency status, everywhere in the world on worldwide income (unless tax treaty says otherwise). If the building has no income, it also probably has minimal expenses. The heat, water and electricity costs are nearly zero. They are letting the value depreciate, and taking it off the taxes. I also suspect the condition of the building is poor, so any effort to make the building productive would be very costly. Many cities combat this by setting the tax on empty buildings or empty lots at a much higher rate. Or they set the value of the property at a high valuation based on what it could generate. Sometimes this is only targeted at some sections of the city to encourage development. They also offer tax breaks when the owner of a house has the house as their principal residence. I do NOT know the full answer but I know here are some important factors that you need to consider : Do you have a physical location in the United States? Are you working directly from Canada? With a office/business location in the United States your tax obligation to the US is much higher. Most likely you will owe some to the state in which your business is located in Payroll Tax : your employer will likely want to look into Payroll tax, because in most states the payroll tax threshold is very low, they will need to file payroll tax on their full-time, part-time employees, as well as contractor soon as the total amount in a fiscal year exceeds the threshold Related to No.1 do you have a social security number and are you legally entitled to working in the States as an individual. You will be receiving the appropriate forms and tax withholding info Related to No.3 if you don't have that already, you may want to look into how to obtain permissions to conduct business within the United States. Technically, you are a one person consulting service provider. You may need to register with a particular state to obtain the permit. The agency will also be able to provide you with ample tax documentations.  Chances are you will really need to piece together multiple information from various sources to resolve this one as the situation is specific. To start, look into consulting service / contractor work permit and tax info for the state your client is located in. Work from state level up to kick start your research then research federal level, which can be more complex as it is technically international business service for Canada-US *Disclaimer: I am a tax accountant , but I am not your professional accountant or advocate (unless you have been in my office and signed a contract). This communication is not intended as tax advice, and no tax accountant / client relationship results. *Please consult your own tax accountant for tax advise.** A foreign citizen may form a limited liability company. In contrast, all profit distributions (called dividends) made by a C corporation are subject to double taxation. (Under US tax law, a nonresident alien may own shares in a C corporation, but may not own any shares in an S corporation.) For this reason, many foreign citizens form a limited liability company (LLC) instead of a C corporation A foreign citizen may be a corporate officer and/or director, but may not work/take part in any business decisions in the United States or receive a salary or compensation for services provided in the United States unless the foreign citizen has a work permit (either a green card or a special visa) issued by the United States. Basically, you should be looking at benefiting only from dividends/pass-through income but not salaries or compensations. I think you can. I went to Mexico for business and the company paid for it, so if you are self employed you should be able to expense it. "The real question you're asking is how you can work for your business. You cannot. Whether your ""friend"" pays you or not is entirely irrelevant. Claiming your work-related earnings as interest/dividend will make it also a tax fraud, in addition to the immigration violation (i.e.: not only deportation but also potentially jail time)."