Yes, Saudi Labor Law (Royal Decree No. M/51) applies to expat workers in the Kingdom. Article 5 states that the law covers any contract where a person commits to work for an employer under their management or supervision in exchange for a wage — this applies regardless of your nationality.
However, there are some exemptions worth knowing. Article 7 excludes certain categories such as an employer's immediate family members who are the sole workers in a business, as well as domestic workers and similar roles (governed by separate regulations). Most expats working under standard employment contracts in companies, factories, or offices are fully covered.
Practically speaking, this means you are entitled to protections including maximum working hours, overtime pay, official holidays, end-of-service benefits, and more. Always ensure your employment contract is written and signed before you begin work, as it is the foundation of your legal protection under this law.
This is general legal information, not legal advice. For advice on your specific situation, consult a lawyer licensed in Saudi Arabia.