Under the Saudi Civil Transactions Law, your legal domicile is your place of habitual residence — the location where you regularly and primarily live (Article 8). Importantly, the law explicitly allows a person to have more than one domicile at the same time, which is directly relevant to expats who may split their time between Saudi Arabia and their home country.
If you do not have a fixed habitual residence, the law treats your current place of stay as your domicile by default (Article 8). Additionally, if you run a business or practice a profession in Saudi Arabia, the location of that business activity is treated as your domicile for matters related to that trade or profession (Article 9). This means disputes or legal notices connected to your work could be directed to your workplace address.
Expats can also elect a specific domicile for a particular legal act — for example, designating an address in a contract for the purpose of receiving notices related to that contract (Article 11). This is a useful practical tool when signing leases, employment contracts, or business agreements. It is advisable to be deliberate about the addresses you provide in legal documents, as they will determine where legal communications are formally sent.
This is general legal information, not legal advice. For advice on your specific situation, consult a lawyer licensed in Saudi Arabia.