Income tax and corporation tax fraud

Not declaring income or assets to the Tax and Customs Administration constitutes income tax or corporation tax fraud.

Forms of income tax and corporation tax fraud

There are several forms of fraud involving income tax and corporation tax. They include:

  • not declaring income or assets (e.g. undeclared savings);
  • unlawfully claiming or overclaiming deductible items;
  • unlawfully claiming certain forms of tax relief, such as the investment tax credit;
  • providing false information on a company’s place of establishment.

Investigation of undeclared savings

People who do not declare all their assets in their annual tax return are guilty of having undeclared savings. The Fiscal Information and Investigation Service (FIOD) is carrying out more investigations of foreign bank accounts held by Dutch residents and is detecting more undeclared savings.

Tax amnesty: measure to combat undeclared savings withdrawn

A tax amnesty applied to tax returns that were or should have been filed before 1 January 2018. People who did not declare savings in recent years were not fined and they received a lower fine for earlier years.

The tax amnesty ended on 1 January 2018. You now risk a fine of up to 300% if you do not voluntarily declare your savings.

Read more about how you can declare your savings and correct your tax return on

Reporting tax fraud

Entrepreneurs can use the TaxLine to report suspected fraud.