(For a transition period, some states have a separate arrangement. They may offer each non-resident account holder the choice of taxation arrangements: either (a) disclosure of information as above, or (b) deduction of local tax on savings interest at source as is the case for residents).
A large number of Foreign Institutional Investors who trade on the Indian stock markets operate from Mauritius. According to the tax treaty between India and Mauritius, Capital Gains arising from the sale of shares is taxable in the country of residence of the shareholder and not in the country of residence of the Company whose shares have been sold. Therefore, a company resident in Mauritius selling shares of an Indian company will not pay tax in India. Since there is no Capital gains tax in Mauritius, the gain will escape tax altogether.
Some articles on DTAA can be found here
If a foreign citizen is in Germany for less than a relevant 183 day period (approximately six months) and are tax resident (ie., and paying taxes on your salary/benefits) elsewhere, then it may be possible to claim tax relief under a particular Double Tax Treaty. The relevant 183 day period is either 183 days in a calendar year or in any period of 12 months, depending upon the particular treaty involved. The Double Tax Treaty with the UK, for example, looks at a period of 183 days in the German tax year (which is the same as the calendar year).
So, for example, you could work in Germany from 1 September through to the following 30 May, a total of 10 months, whilst being tax resident in Germany and could claim to be exempt from German tax under a Double Tax Treaty. This is assuming that during this period you were tax resident in another country and paying taxes on your salary and benefits there.
In some cases, it would be beneficial, from a tax standpoint, to claim exemption under a Double Tax Treaty, i.e., if your other country of tax residence levies much lower taxes. In other cases, whilst the tax liability may be broadly similar (e.g., as with the UK and Germany), claiming exemption under a Double Tax Treaty offers administrative convenience and savings in professional fees (payroll bureau, tax return filing etc). In Germany, if the criteria of a relevant Double Tax Treaty are satisfied then there is no requirement to submit a formal claim for relief; rather, exemption may simply be assumed. The other criteria are that you are paid by a non-German company and that the costs of your employment are borne by a non-German company. You should not, generally, have a problem satisfying these criteria.
If you are receiving a salary for working in Germany and that salary is subject to German tax, i.e., relief under a Double Tax Treaty is not available or desirable, you (as a company) or your employer is obliged to deduct a German withholding tax and pay this over to the German Revenue authorities on a regular basis. You will need to seek professional advice in Germany as to the calculation, regularity and transmission of these payments and contact details can be provided if required.
The US requires its citizens to file tax returns reporting their earnings wherever they reside. However, there are some measures designed to reduce the international double taxation that results from this requirement.
First, an individual who is a bona fide resident of a foreign country or is physically outside the US for an extended time is entitled to an exclusion (exemption) of part or all of his earned income(i.e. personal service income, as distinguished from income from capital or investments.) That exemption is currently set at $85,700 (2007).
Second, the US allows a foreign tax credit by which income taxes paid to foreign countries can be offset against US income tax liability attributable to foreign income. This can be a complex issue that often requires the services of a tax advisor. The foreign tax credit is not allowed for taxes paid on earned income that is excluded under the rules described in the preceding paragraph (i.e. no double dipping).