A foreigner marries a Thai citizen legally by registering the marriage at a Thai district office (the amphur, or khet in Bangkok). Before that, most foreigners need a document from their own embassy confirming they are free to marry, translated into Thai and legalized by the Ministry of Foreign Affairs. Once married, you can apply for a Non-Immigrant O visa or a one-year extension based on the marriage.
The Thai side of the process is the same for everyone. What differs is the first step: each country has its own document, fee and appointment system for confirming that its citizen is single. A British citizen, an American, a Singaporean and a Chinese citizen will each follow their own embassy's instructions, and those instructions change from time to time. This guide explains the common route and uses the UK process, which is published in detail, as a worked example.
If you are still at the stage of getting to know each other's families, our page on dating in Thailand covers the cultural side of relationships. This page is about the paperwork.
Marrying in Thailand: the legal route at a glance
- Where the marriage becomes legal
- Registration at a district office (amphur/amphoe, or khet in Bangkok)
- Step 1
- Your embassy's affirmation or affidavit of freedom to marry
- Step 2
- Certified Thai translation, then legalization at the Ministry of Foreign Affairs
- Step 3
- Registration at the district office with your Thai partner, passports, Thai ID card and witnesses as required
- Same-sex couples
- Able to register since 23 January 2025
- Visa afterwards
- Non-Immigrant O (from abroad) or a one-year extension in Thailand
- Money for the visa
- 400,000 baht in the bank or 40,000 baht monthly income (e-Visa portal, October 2026)
A wedding ceremony is not a legal marriage
Many couples hold a traditional Thai wedding at the bride's or groom's family home, with monks in the morning, the water-pouring blessing and a party, and often an agreed sin sod (bride price). It is a real and important event for the family. It is not, on its own, a legal marriage. The legal step is the registration at the district office, and the Thai marriage certificate you get there is the document immigration, banks and your home country will ask for.
Couples often do both: the family ceremony in the home province and the registration on a weekday at a district office. They do not have to be on the same day or in the same place, but your embassy document may tie you to a particular province and month, so plan the registration first.
Step 1: proving you are free to marry, embassy by embassy
Thai district officials need evidence that the foreign partner is legally single, because they cannot check foreign registers. That evidence comes from your own country, usually from its embassy in Bangkok. Different countries call it an affirmation, an affidavit, a certificate of no impediment or a certificate of marital status, and each sets its own fee and rules. Check your embassy's own page before booking anything, and ask the district office where you will register what it accepts.
The UK's published process, last updated in November 2025, shows the kind of detail involved:
- Apply online and pay £50 for the marital status affirmation plus £25 for a certified copy of your passport (£75 in total).
- Upload proof of address, proof that any earlier marriage has ended, and the names and addresses of two referees who live outside Thailand.
- Book an appointment at the British Embassy Bangkok at least seven days after applying. Appointments are usually on Tuesdays and Thursdays, can be booked up to 45 days ahead, and may be three weeks away in busy periods.
- Bring the originals of everything you uploaded. You sign the affirmation at the appointment and receive it the same day. Your Thai partner does not need to attend.
The UK affirmation is valid only for the month and province you name. The British government says you can only marry in the month and province stated on the document, that you should not apply more than three months before the wedding, and that most district offices accept affirmations dated up to three months before the marriage. Other embassies set their own limits, so read yours carefully.
If you were married before, expect to show a final divorce decree, an annulment, or your late spouse's death certificate together with the marriage certificate. A partner who is neither Thai nor from your country follows their own embassy's process.
Step 2: translation and legalization at the Ministry of Foreign Affairs
Once you have the embassy document, it has to be translated into Thai and then legalized, meaning certified as genuine, by Thailand's Ministry of Foreign Affairs. The UK guidance tells British citizens to allow enough time for this between the embassy appointment and the wedding.
Legalization is done by the Nationality and Legalization Division of the ministry's Department of Consular Affairs, at 123 Chaeng Watthana Road in Lak Si, northern Bangkok. Its legalization page (in Thai) has online queue booking, translation guidelines and a notice specifically on legalizing documents for marriage registration with a foreigner. The department's office hours are Monday to Friday, 08:30–16:30, except public holidays. We could not confirm the current fees and processing times on an official page, so check them there before you go. Translation agencies near the department and in tourist areas offer combined translation and legalization services; that is convenient, but you are paying for convenience, and you should check that the translation spells both names exactly as in your passports.
If your district office also wants other foreign documents, such as a divorce decree, they will usually need the same translation and legalization treatment. Ask before you start, not at the counter.
Step 3: registering at the district office
The British government's guidance says simply that you register the marriage at the local district office and should contact it in advance to understand the eligibility rules and the documents needed. That advice applies to everyone. Requirements differ slightly between offices, and some are far more used to foreign spouses than others.
On the day, both partners attend with their passports or Thai ID card, the legalized embassy document and its translation, and anything else the office asked for. Ask in advance whether the office wants witnesses, and whether you must bring an interpreter if you do not speak Thai. The registrar records the marriage and issues the Thai marriage certificate. Read the names, dates and nationalities before you sign, because correcting a mistake later is slow.
Visit or phone the district office a week or two before the date. Ask which documents it wants, whether it needs witnesses or an interpreter, and whether it registers foreigners on any day or only by appointment. District offices close on public holidays; our guide to Thai public holidays lists them.
Keep several certified copies of the marriage certificate. You will need them for the visa, the bank, any change of name and for registering the marriage in your home country.
Same-sex marriage in Thailand
Thailand's marriage equality law came into force on 22 January 2025, and district offices have accepted registrations from same-sex couples since 23 January 2025, according to the UK government. The steps are the same as above. The UK government said it would help British citizens obtain the necessary documents once the Ministry of Interior had set out the procedures; check your own embassy's current position, because some countries' documents were written with opposite-sex marriage in mind.
Getting the marriage recognized at home
The UK recognizes a Thai marriage if the Thai procedure was followed and the marriage would be allowed under UK law. Most countries apply a similar principle, but many also ask you to register the foreign marriage with your home authorities, sometimes within a deadline, and to provide a translation. Your embassy or home registry office can tell you what applies to you. If you plan to move your Thai spouse abroad later, read that country's spouse visa rules early, because they often ask for the same documents in a specific form.
The marriage visa: Non-O from abroad or an extension in Thailand
Marriage does not give a foreigner the right to stay in Thailand automatically. It gives you a basis for a visa. There are two common routes; our overview of Thai visas sets them against the other long-stay options.
From abroad: the official e-Visa portal lists a Non-Immigrant O visa to stay with a Thai family member. As of October 2026 the financial evidence is a monthly income of at least 40,000 baht or a balance of 400,000 baht, plus your spouse's Thai ID or passport and proof of the relationship such as the marriage certificate. It is a single-entry visa valid for three months.
Inside Thailand: a one-year extension of stay based on marriage to a Thai citizen is applied for at the immigration office for your area. The figures commonly given are the same, 400,000 baht in a Thai bank account or a monthly income of at least 40,000 baht, but how long the money must have been in the account, and what else your office asks for (photos of the couple at home, a house visit, witnesses), are set locally. We could not read the Immigration Bureau's own page, so confirm the list at your office before you apply. That 400,000 baht has to sit in a Thai account, which is one reason to arrange a Thai bank account early.
If you are visiting for the wedding itself, you will probably enter on the visa exemption, which is 30 days for most Western and many Asian nationalities as of October 2026. Book the embassy appointment and the legalization with that limit in mind.
After the wedding: the paperwork that follows
Once you live in Thailand on a marriage extension, the routine obligations of any long-stay foreigner apply: reporting your address every 90 days, a TM30 address notification from the owner of the home you live in, and, before any trip abroad, a question to immigration about a re-entry permit so that your extension is not lost. If you spend 180 days or more a year in Thailand, read our guide to tax residency and foreign income.
Property is a separate legal subject with its own restrictions for foreigners. Take advice from a Thai lawyer before buying a home or land together, and before you sign anything in your spouse's name.
Frequently asked questions
How long does it take to marry a Thai citizen?
Plan for several weeks. The embassy appointment may be booked days or weeks ahead, legalization takes time at the Ministry of Foreign Affairs, and the district office registration itself is usually quick once your documents are in order. Start with your embassy's appointment calendar and work backwards from the wedding date.
Does a Buddhist or family wedding make us legally married?
No. A ceremony at home or at a temple matters to the family, but under Thai law the marriage is registered at a district office. Without that registration you will not have a Thai marriage certificate for a visa or for recognition in your home country.
How much money do I need for a Thai marriage visa?
The e-Visa portal lists 400,000 baht in savings or a monthly income of at least 40,000 baht for a Non-Immigrant O visa to stay with a Thai spouse (October 2026). The in-country extension uses the same amounts, but your immigration office decides how the money must be held and documented.
Can we marry anywhere in Thailand?
You can register at a district office anywhere in the country, but your embassy document may name a province and month. The UK affirmation, for example, is accepted only for the month and province stated on it. Choose the district office first, then apply for the document.
Sources
- GOV.UK – Confirm you're free to get married in Thailand (checked October 2026)
- Thai e-Visa (Ministry of Foreign Affairs) – Non-Immigrant Visa O (checked October 2026)
- Ministry of Foreign Affairs, Department of Consular Affairs – Legalization of documents (Thai) (checked October 2026)
- GOV.UK – Living in Thailand (checked October 2026)