Common-law marriage in Thailand
Couples who live together for years in Thailand often ask whether common-law marriage or de facto partnership is recognised the way some Western countries treat long cohabitation. Under Thai law, the answer is no. Cohabitation alone does not create a legal marriage.
Thailand recognises marriage only when registered under Section 1457 of the Civil and Commercial Code at a district office. Thai Visa Centre explains what this means for visa status, property, and protective agreements. See our marriage in Thailand guide and marriage and property guide for registered marriage planning.
Section 1457 Civil and Commercial Code. Amphoe registration creates legal marriage.
Duration of living together does not create marriage under Thai law.
Registered at amphoe under same civil framework.
Immigration requires registered marriage certificate, not cohabitation proof.
What Thai law says about common-law marriage
Living together five, ten, or twenty years does not automatically grant spousal inheritance rights, marriage visa eligibility, or equal division of property on separation. Only amphoe registration creates legal marriage.
| Concept | Recognised in Thailand? |
|---|---|
| Registered civil marriage | Yes. Amphoe registration. |
| Common-law / de facto marriage by cohabitation | No. Not equivalent to marriage. |
| Same-sex registered marriage | Yes. Since January 2025 via amphoe. |
| Religious ceremony without registration | No legal marriage effect. |
Immigration and visas
A Non-Immigrant O marriage visa requires a registered marriage certificate to a Thai national. Immigration does not accept cohabitation evidence as a substitute. Retirement, DTV, Elite, and tourist visas are unaffected by relationship status.
| Status | Marriage visa eligible? |
|---|---|
| Registered Thai marriage | Yes, plus qualifying financial proof for Non-Immigrant O marriage visa. |
| Long-term cohabitation, unregistered | No. Cohabitation evidence is not accepted. |
| Thai partner biological child | Different visa categories apply. Not marriage visa. |
Ready to formalise? Read our marriage visa guide and browse visa services.
Property and assets
Unmarried couples face weaker default protections. Condominium title, land restrictions, and joint purchases need explicit documentation.
- Condominium purchases in one name remain that person property. Cohabitation does not create shared title.
- Land cannot be held in foreign names regardless of relationship length.
- Joint purchases need explicit co-ownership documentation. Not assumed from cohabitation.
- On breakup, disputes are handled as property claims, not divorce proceedings.
Inheritance: Without registered marriage or valid Thai will, a long-term partner may have no statutory inheritance rights. Spouses inherit under the Civil and Commercial Code. Unregistered partners do not.
Protective alternatives to common-law marriage
If you choose not to register marriage, or are not yet ready, consider written agreements and estate planning. Complex property planning may require counsel registered with the Lawyers Council of Thailand.
| Tool | Purpose |
|---|---|
| Cohabitation / property agreement | Defines asset ownership and division if you separate. |
| Prenuptial agreement | Only valid if you register marriage at the same amphoe. |
| Thai will and testament | Names partner as beneficiary regardless of marriage status. |
| Registered marriage at amphoe | Full spousal rights under Thai civil law. |
Foreign common-law recognition
Some home countries recognise de facto relationships for tax or immigration. Thailand local law still requires registration for Thai legal effects. A foreign de facto certificate does not replace amphoe registration for Thai immigration. If you married abroad and never registered in Thailand, recognition depends on treaty and administrative practice.
Frequently asked questions
General answers on cohabitation and legal marriage in Thailand. Cohabitation agreements and wills require separate legal advice. We focus on registration and immigration pathways.
Q:We have lived together ten years. Are we legally married?
A:No, unless you registered at an amphoe. Duration of cohabitation does not create marriage under Thai law.
Q:Can we get a marriage visa based on engagement or cohabitation?
A:No. Immigration requires a registered marriage certificate and qualifying financial proof.
Q:Does a Buddhist wedding ceremony create common-law marriage?
A:No. Only registration creates legal marriage. Religious ceremony alone has no civil effect.
Q:What if we register now after years together?
A:Registration creates legal marriage from the registration date forward. Prior cohabitation does not retroactively create marital property regimes without agreement.
Q:Does a foreign de facto certificate work in Thailand?
A:No. A foreign de facto certificate does not replace amphoe registration for Thai legal and immigration effects.
Q:What inheritance rights do unregistered partners have?
A:Without registered marriage or valid Thai will, a long-term partner may have no statutory inheritance rights under Thai law.
Q:If we married abroad but never registered in Thailand?
A:Recognition depends on treaty and administrative practice. Consult on your specific home country. Amphoe registration may still be needed for Thai immigration.
Q:How do we formalise our relationship for visa purposes?
A:Register marriage at amphoe with embassy documents, translation, and MFA legalisation. Then apply for Non-Immigrant O marriage visa with financial proof.