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What is a double taxation agreement (DTA)?

A double taxation agreement (DTA) is an international treaty between two countries or jurisdictions. The main aim of a DTA is to prevent the double taxation of income that could be taxable in both countries if no agreement existed. Double taxation occurs when a taxpayer has to pay tax on their income in two different countries, which can lead to an unfair burden.

A DTA typically specifies:

  • Which country has the right to tax certain types of income: The agreement determines which country has the sole right to tax certain income such as dividends, interest, royalties, salaries, etc.
  • Methods to avoid double taxation: The DTA establishes mechanisms for how taxes paid abroad can be credited or deducted from the tax owed domestically.
  • Rules for information exchange: DTAs may include provisions for the exchange of tax-relevant information between the contracting states to combat tax evasion.
  • Definitions and dispute resolution procedures: They clarify terms and establish procedures for resolving tax disputes between the contracting states.

The exact provisions in a DTA vary from agreement to agreement and depend on the interests of the countries involved. DTAs are important for easing the tax burden on individuals and companies earning cross-border income, and they help promote international business activities and investments.

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You can find information on the DTAs concluded by Germany here: Double taxation agreements and other agreements in the tax sector

What is a double taxation agreement (DTA)?



What is tax-free wages under DBA/ATE?

This refers to tax-free wages under a double taxation agreement (DTA) or foreign employment decree (FED). A DTA stipulates how employees working abroad must tax their income to avoid double taxation. Wages for work abroad can be tax-free under the foreign employment decree if there is no double taxation agreement with the relevant country and the work lasts for at least three consecutive months. Illness or holiday does not affect the duration of employment but is not counted towards the three-month period.

If your salary is taxable abroad, you will be exempt from tax in Germany under a DTA or FED. However, income taxed abroad is included in the progression clause in Germany. This means that a total income is calculated from the foreign income and other income in Germany. This total income results in a higher tax rate, but only the income earned in Germany is taxed at this rate.

Exceptions:

  • For France, Austria, and Switzerland, a special cross-border commuter regulation applies under the double taxation agreement. If you work in these countries, the wages are taxed in the country of residence, Germany.
  • In Switzerland, the employer may deduct a wage tax of 4.5 percent, which is credited against the tax in Germany.
  • Civil servants and public sector employees always tax their income in the country where they work, as the principle of the paying state applies.

Note: The foreign employment decree has recently been revised. We would like to draw your attention to a particularly important new provision: employees must prove that their wages abroad were subject to a minimum taxation. If you cannot provide proof or if there is no minimum taxation, the foreign employment decree and thus the tax exemption in Germany do not apply. The new regulations apply to wages and other remuneration paid after 31.12.2022 or received by the employee after this date.

Note: More and more double taxation agreements are currently being amended to give special consideration to home office days. In individual cases, it should therefore be carefully checked where the right of taxation lies.

What is tax-free wages under DBA/ATE?

Field help

Have you had another place of residence in Belgium?

If you maintain an additional residence in Belgium, select "yes".

Since 2004, the special cross-border commuter regulation has been abolished, and the general double taxation agreement (DTA) regulation now applies. This means: Income from employees who live in the border area of one country and work in the border area of the other country is taxed in the respective country of employment (as is the case with Luxembourg, the Netherlands, Denmark, or Poland).

However, there is a special regulation for commuters from Belgium:

  • Belgium, as the country of residence, exempts wages taxed in Germany as the country of employment (including civil service salaries and pensions) from income tax and only includes them in the calculation of the tax rate.
  • However, this income is included in the Belgian municipal tax, which is an additional tax on income tax.
  • To offset this Belgian municipal tax, German income and wage tax on this income is reduced by a flat rate of 8%.
Wages

If you received wages in Belgium, enter it here.

Were there any income-related expenses in connection with the wages?

If you have incurred business expenses, select "yes".

Address

Please enter your address in Belgium.

Amount of income-related expenses

Enter here the amount of incurred income-related expenses

Should construction withholding tax be credited?

Did you provide construction services in 2025 and the recipient of the service made a 15% tax deduction from the payment?

If so, the tax deduction amount may be credited against your income tax. Please enter a "1" in line 23. Please note that your tax office may primarily credit the tax deduction amount against the wage tax you have withheld and declared, as well as your income tax prepayments. You can find the amount of the tax deduction on the statement from your service recipient.