There are two main options for reducing your Spanish taxes, once your Beckham non-resident rate of 24% expires. (If you are moving here, the Beckham tax rate is generally your best first option, but you need to move quickly. Once you’ve been here for more than six months, you will not be able to apply anymore. The application process is trivial, so it’s better that you do it yourself, rather than risk missing the date due to the incompetence of your human resources department. Yes, Spanish HR departments are among the worst I’ve ever experienced.)
So you’ve been here for six years, what do you do now?
First, if you live here without your family, and you have more connections back in the US (other countries with a lower tax rate and a tax treaty with Spain may also work), you can use the “tie-breaker” provision in the tax treaty to be a tax resident in only the US. The US/Spain tax treaty states:
Where by reason of the provisions of paragraph 1, an individual is a resident of both Contracting States, then his status shall be determined as follows:
(a) he shall be deemed to be a resident of the State in which he has a permanent home available to him; if he has a permanent home available to him in both States, he shall be deemed to be a resident of the State with which his personal and economic relations are closer (center of vital interests);
(b) if the State in which he has his center of vital interests cannot be determined, or if he does not have a permanent home available to him in either State, he shall be deemed to be a resident of the State in which he has an habitual abode;
(c) if he has an habitual abode in both States or in neither of them, he shall be deemed to be a resident of the State of which he is a national;
(d) if he is a national of both States or of neither of them, the competent authorities of the Contracting States shall settle the question by mutual agreement.
This means that if you are a US citizen, with a home back in the US available to you, and your family lives in the US, you have a pretty good case for being treated as a US resident for tax purposes, which means you are a NON-resident in Spain (and you continue paying 24%). Note that if you have your spouse or children living with you in Spain, this argument generally doesn’t work. You also need to get a certificate of tax residency from the US consulate.
Secondly, if your work involves a lot of travelling, you can exclude a big chunk of your your income if you perform work for a company or entity that is not resident in Spain. This only helps if the country you work for has a lower tax rate than Spain (or in the case of the US, income you already have to declare if you are American). Our helpful friends at KPGM explain:
Income generated from employment for services rendered in a foreign country is tax exempt up to a limit of €60,100 (2009), provided that the work is performed for a company or entity non-resident in Spain, or for a permanent establishment located in a foreign country and provided that a tax similar to the Spanish Personal Income Tax is applied in the territory where the work is performed. In addition, the territory must not be considered a ‘tax haven’ by the Spanish tax authorities. At present, the UK Dependent Territories of the Channel Islands and the Isle of Man, as well as the UAE, Hong Kong and Singapore, are all included on a ‘blacklist’ of tax havens maintained by the Spanish Tax Authorities.