Fiscal rules are guidelines that governments use to manage their money better. They help keep public spending in check and prevent overspending. These rules are important for making sure that countries have stable finances. However, just having rules in place doesn't always guarantee success. The effectiveness of these rules can be affected by many factors. In the European Union, countries have their own fiscal rules, as well as rules that apply to all EU members. In Poland, specific fiscal rules are used to control government spending. The main goal of this article is to show how fiscal rules help shape fiscal policy in different countries, including Poland.