Outside the tax plan are also tax bills are introduced. This happens for example when an existing law needs reform. The rules for income tax, corporation tax, dividend tax must be regularly adapted to new (international) developments. This also applies to the car tax, the tax on passenger cars and motorcycles and excise taxes. Even as laws many administrative burden, this may result in adjustments to this legislation.

Furthermore, tax rules introduced for certain policy goals. If evaluation shows that the goals are achieved or not achieved, legislation may be adjusted. An example is the zelfstandigenaftrek to encourage entrepreneurs. This scheme has been extended to the increasing number of entrepreneurs.

The Revenue collects the taxes and ensures that everyone is aware of his tax obligations. The Financial Secretary is responsible for the operation of the Tax. Furthermore is the organization and functioning of the customs under the responsibility of the Secretary of Finance. The Court of the State monitors the performance of the duties of the Tax and Customs.