QUOTE (osita @ Jul 20 2009, 12:31 AM)

Is there any country in the world where that happens?

Income tax is there to fund your health, security and wellbeing while you are residing in the country (the police on the street, the firemen, armed forces, the transport infrastructure, the education of the next generation, oh and in this case to stop the North Sea reclaiming the country).
If you see a decent tax advisor, I'm sure that you can reclaim
some legitimate expenses when you file your tax return. I can't answer the length of time but have heard it can be up to 9 months (and they are obliged to pay you interest on whatever they owe).
After all, quite a lot of questions and as matter of fact those require some expertise which usually is not to be obtained for free, at least not in the Lowlands.
1) if you are priviliged with the 30% rule it means that 30% of your annual income is out of scope for incometax computation and usually paid as a cash payment on top of your regular net income. You gross income on your payslip has already disregarded the 30% , your net amount on the payslip includes it again. Depending whether you are deemed as resident or non resident taxpayer, the 30% may apply to your global income (including oversea dividends and interest received) or is limited to income in the Netherlands (Salary, domestic NL interest received, dividends etc. ) Each of this has its pros and cons but it would go to far to go into details here.
2) If you stay longer than 185 days per fiscal year, you are tax liable in the Netherlands unless you are on a true EXPAT contract, whereby all your payrollaffairs are kept outside of the Netherlands. Since you have the 30% rule, this does not seem applicable for you. Should you leave the Netherlands and the current fiscal year is younger than 185 days, you have a good chance to recover a good hieb of taxes deducted from your payroll. You may have to prove that you will file and pay the income tax made in your Dutch days of the year in the fiscal jurisdiction you may move to. If you apply for such tax reimbursement, you can only do so after fiscal year end. From processing your return till final payment is an estimated lead time of 4 month but it can take longer for a variety of reasons. However, since the whole matter is quite complex I suppose not to go the typical Dutch way but spent some money and get professional advice