Using Government-Owned Materials For One's Own Benefit
Question :
What is the ruling for using government-owned materials for one's own benefit at the office, small things like a pen, a ruler, etc.?
Answer:
It is unlawful to use those things at the office that the government owns for personal benefit. This practice undermines the trust that Allah Almighty has prescribed. An exception can be made to things that aren't affected by use, such as a ruler. But it is not permissible to utilize things that are consumed when used like pens, paper, or a copy machine.
Source:
Ibn 'Uthaimin
Fatawa Islamiyah, Vol. 8 Page 88