Book 5: Family

Section 1490: Which debts are joint debts

Amended by Act No. 24 B.E. 2567 (Marriage Equality), in force 23 January 2025 Gendered terms (husband/wife) replaced with gender-neutral 'spouse'; the rule applies equally to same-sex married couples.

Statutory text (Thai original)

หนี้ที่คู่สมรสเป็นลูกหนี้ร่วมกันนั้นให้รวมถึงหนี้ที่คู่สมรสฝ่ายใดฝ่ายหนึ่งก่อให้เกิดขึ้นในระหว่างสมรสดังต่อไปนี้

(๑) หนี้เกี่ยวแก่การจัดการบ้านเรือนและจัดหาสิ่งจำเป็นสำหรับครอบครัว การอุปการะเลี้ยงดูตลอดถึงการรักษาพยาบาลบุคคลในครอบครัวและการศึกษาของบุตรตามสมควรแก่อัตภาพ

(๒) หนี้ที่เกี่ยวข้องกับสินสมรส

(๓) หนี้ที่เกิดขึ้นเนื่องจากการงานซึ่งคู่สมรสทำด้วยกัน

(๔) หนี้ที่คู่สมรสฝ่ายใดฝ่ายหนึ่งก่อขึ้นเพื่อประโยชน์ตนฝ่ายเดียว แต่อีกฝ่ายหนึ่งได้ให้สัตยาบัน

Verbatim from the Royal Gazette / Office of the Council of State

English translation

Debts for which the spouses are jointly liable include the following debts incurred by either spouse during the marriage:

(1) debts concerning the management of the household and the provision of necessaries for the family, the maintenance and medical treatment of members of the family, and the education of the children, as is appropriate to their condition in life;

(2) debts connected with the marital property;

(3) debts arising from a business carried on by the spouses together;

(4) debts incurred by one spouse for that spouse's own benefit alone, but ratified by the other.

ThaiLawOnline translation, written from the Thai original and verified

Firm annotation

Section 1490 is what a creditor uses to reach a spouse who did not incur the debt. It lists FOUR categories, and the fourth is the one most often missed: (1) debts for managing the household and providing the family's necessaries, maintenance and medical care, and the children's education, judged by the family's condition in life; (2) debts connected with the marital property, such as a mortgage over the marital home; (3) debts arising from a business the spouses carry on TOGETHER; and (4) a debt one spouse incurred for their own benefit alone which the other has ratified. Limb (3) turns on the spouses running the business jointly, not on the family benefiting from one spouse's income, so a debt from one spouse's own occupation does not fall within it. A purely personal debt becomes a joint debt only by ratification under (4). How a joint debt is then satisfied is Section 1489, which reaches the marital property AND the personal property of both spouses, not this section.

High importance

Why this matters in practice

For lawyers: a creditor must prove the debt was for family benefit or marital property management to reach Sin Somros; a purely personal debt of one spouse cannot be satisfied from marital property without the other's consent. For clients: debts taken out for running the household or for joint business ventures bind your Sin Somros; purely personal debts of your spouse do not automatically bind you.

Legislative history

Section 1490 has applied since the B.E. 2519 revision of Book 5. The Marriage Equality Act (No. 24, B.E. 2567), in force 22 Jan 2025, extended the joint-debt regime to all married couples regardless of gender.

  • marital debts
  • Sin Somros liability
  • joint debts
  • creditors
  • family expenses

Supreme Court decisions interpreting this section

  1. Supreme Court Judgment No. 7631/2552 (2009)

    Where a husband borrows money and his wife signs the loan agreement as a witness, she is taken to have ratified the making of that loan, and the debt is a joint debt of husband and wife under section 1490(4). A creditor of joint debtors may under section 291 sue them all at once for their respective shares, or sue them one at a time until the debt is satisfied in full. It follows that where the creditor sued only the husband in an earlier action and did not join the wife, the wife is not the same party as the defendant in that earlier action, and a later action against her is not a repeat suit. The decision establishes joint liability and the creditor's choice of whom to sue; it does not decide which class of matrimonial property may be taken in execution.

    The husband of the defendant borrowed money from the plaintiff and the defendant signed the loan agreement as a witness. The Supreme Court held that she had thereby ratified the loan, so that it was a joint debt of husband and wife under section 1490(4), and that as creditor of joint debtors the plaintiff could under section 291 sue them all together for their shares or sue them one at a time until paid in full. In an earlier action the plaintiff had sued the husband alone on the same loan agreement and had not joined the defendant to answer for it with him. The defendant was therefore not the same party as the defendant in that earlier action, and the present action against her was not a repeat suit.

    Read the full decision (deka.in.th)

  2. Supreme Court Judgment No. 6686/2552 (2009)

    A debt one spouse incurs for their own account alone becomes a joint marital debt under section 1490(4) if the other spouse ratified it, and ratification is established by proof that the other spouse knew of and acquiesced in the borrowing. Once the debt is joint the creditor may enforce against the whole of the Sin Somros, and the other spouse cannot have a half share set aside out of the auction proceeds.

    The wife borrowed from the plaintiff repeatedly and died; the plaintiff obtained judgment against her heirs and seized land held jointly by her and the petitioner husband. He applied under Civil Procedure Code section 287 to have half the auction proceeds set aside, saying he neither knew of nor consented to the loans. The Supreme Court found that evidence unconvincing: on a salary of about 10,000 baht a month he was supporting the family and a son education while his wife was terminally ill with lung cancer, the title deed had been pledged to secure the loans, he himself insisted his wife never took the deed without telling him first, and he admitted meeting the lender twice after the demand letter. It held he knew of and acquiesced in the borrowing, so the debt was a joint marital debt under section 1490(4), the plaintiff could enforce against the whole of the Sin Somros, and no share could be set aside.

    Read the full decision (deka.in.th)

Curated decisions with case numbers verified against the Supreme Court database. English renderings are the firm's editorial translation for study.

Cited in 72 Supreme Court decisions (1958 to 2025)

Selected citing decisions

  • Decision 4155/2567 (2024)
  • Decision 4008/2567 (2024)
  • Decision 2794/2567 (2024)
  • Decision 1486/2567 (2024)
  • Decision 3803/2565 (2022)
  • Decision 3801/2565 (2022)
  • Decision 8820/2561 (2018)
  • Decision 14281/2558 (2015)

This list is selected automatically, weighted towards judgments that turn on this section rather than ones that merely recite it when passing sentence. It has not yet been reviewed by the firm.

Most often cited alongside

Sections that appear in the same judgments as this one most often. The figure is the number of decisions.

Counted across the firm's corpus of 83,652 Supreme Court decisions, 1921 to 2026. The count is complete; the stated year range trims rare outliers so it describes where the citations actually sit. These figures are computed by us and are not official court statistics. How we count these, and what we measured

Related guides on ThaiLawOnline

Cite this section

  • Plain citation Civil and Commercial Code, s. 1490 (Thailand)
  • Academic citation Civil and Commercial Code (Thailand), s. 1490. ThaiLawOnline, https://www.thailawonline.com/thai-civil-code/section-1490/ (accessed 27 August 2026).
  • Thai citation ป.พ.พ. มาตรา 1490
  • Permalink https://www.thailawonline.com/thai-civil-code/section-1490/
  • Embed on your site <blockquote cite="https://www.thailawonline.com/thai-civil-code/section-1490/"><p>Debts for which the spouses are jointly liable include the following debts incurred by either spouse during the marriage: (1) debts concerning the management of the household and the provision of necessaries for the family, the maintenance and medical treatment of members of the family,…</p><footer>Civil and Commercial Code, s. 1490 (Thailand): <a href="https://www.thailawonline.com/thai-civil-code/section-1490/">ThaiLawOnline</a></footer></blockquote>

The Thai text is authoritative. The English is an unofficial translation by ThaiLawOnline, free to reuse with attribution.

This is educational reference, not legal advice. Consult a qualified Thai lawyer before relying on any provision.

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