Section 31 explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
Section 31 answers two questions about a new partner. Who must agree before he can join, and is he answerable for what the firm did before his arrival? The first rule can be changed by the partnership deed. The second cannot be escaped by default, apart from the special case of minors in section 30.
Subject to contract between the partners, and to section 30 (minors), no person can be introduced as a partner without the consent of all the existing partners (31(1)). A person who joins does not become liable for any act of the firm done before he became a partner, again subject to section 30 (31(2)). Both sub-sections are short, but the first one is the reason many deeds carry a clause on admission of new partners.
What section 31 contains
| Sub-section | Rule | Can the deed change it? |
|---|---|---|
| 31(1) | No person is introduced as a partner without the consent of all existing partners | Yes. It opens with "subject to contract between the partners" |
| 31(2) | A new partner is not liable for any act of the firm done before he became a partner | The text carries no "subject to contract" words. It is subject only to section 30 |
Both sub-sections are expressly "subject to the provisions of section 30", the section on a minor admitted to the benefits of partnership. That is covered in section 30.
Section 31(1): consent of all the existing partners
The starting rule is unanimity. The word is "all". A majority, even a large one, cannot bring in a new partner on its own. This follows from the nature of the relationship: a partner becomes the agent of every other partner, so each existing partner is entitled to a say on who joins.
What "subject to contract between the partners" means here
The partners may agree, in the deed or another contract, on a different method. For example, a deed could say that a new partner may be admitted if three-fourths of the partners by number agree, or that one named senior partner may nominate a successor. The text does not list the possible variations, but the opening words make clear that the contract can displace the default rule.
Without such a clause, unanimity applies. If the deed is silent, the safe course is to get every existing partner's consent, preferably in writing.
What the text does not say
Section 31 does not say how consent is to be recorded, nor does it say the consent must be written. It does not prescribe a form. In practice a supplementary deed or a reconstituted deed is signed so that the terms of the new partner's entry (capital, share and authority) are on record. For a supplementary deed on admission, see our changes in partnership agreement service, and for the accounting side of admission see reconstitution of partnership.
Example
Asha, Bilal and Charu run a trading firm. The deed is silent on admission of new partners. Asha and Bilal want to bring in Dev with a share of 20%. Charu objects. Under 31(1), Dev cannot be introduced without Charu's consent. If the deed had said "a new partner may be admitted by a majority of partners", the position would have been different, because the contract between the partners would govern.
Section 31(2): no liability for acts before joining
A person who is introduced as a partner does not thereby become liable for any act of the firm done before he became a partner. The words are "does not thereby", meaning that the mere fact of joining does not saddle him with the earlier history of the firm.
Two points to keep in mind:
- The sub-section speaks of acts of the firm done before he became a partner. It does not discuss what the new partner may choose to take on by a separate promise. The text is silent on that; it is a matter for the Indian Contract Act, 1872, which applies where the Partnership Act is silent (section 3).
- His liability for acts after he joins follows the ordinary rules on liability of partners, discussed in sections 25 to 27.
Example
Dev joins the firm on 1 April. The firm had bought stock worth Rs 5 lakh in January and has not paid for it. Under 31(2), Dev does not become liable for that January purchase merely by joining. If in July the firm places a new order, the usual rules on partners' liability apply to him as a partner from April.
The link with section 30
Both sub-sections begin "subject to the provisions of section 30", or contain those words. Section 30 deals with a minor admitted to the benefits of the partnership, who is not a full partner. Section 31 does not repeat what section 30 provides, so for a minor read the two sections together. Do not apply the section 31 rule on non-liability to a minor without reading section 30.
Practical checklist when admitting a partner
- Check the deed for an admission clause. If there is one, follow it; if not, get every partner's consent.
- Record consent and the new terms in a supplementary deed.
- Update the firm's records. If the firm is registered, changes in partners are recorded with the Registrar; see sections 62 and 63.
- For tax consequences of a change in the firm, see our income-tax guides, for example partnership firm taxation under ITA 2025.
Need help with admitting a partner?
Bringing in a new partner touches the deed, the registers and the bank mandates. If you are planning an admission, our changes in partnership agreement team can draft the supplementary deed and guide you on the steps that follow. A short review of your existing deed is usually the first step.
Key takeaways
- A new partner needs the consent of all existing partners, unless the contract between the partners provides otherwise (31(1)).
- Both sub-sections are subject to section 30 on minors.
- A person who joins is not liable for acts of the firm done before he became a partner (31(2)).
- The text does not say how consent must be recorded; a written supplementary deed is sensible.
- Check the admission clause in your deed before acting.
Read next
- Section 32: retirement of a partner
- Sections 33 and 34: expulsion and insolvency of a partner
- Section 30: minors admitted to the benefits of partnership
- Reconstitution deed for new partner admission
Disclaimer: Based on the text of the Indian Partnership Act, 1932 as consulted on 1 October 2026. Several States have amended the registration chapter and make their own rules, forms and fees for the Registrar of Firms. This article is general information, not legal advice; check the official text and your State's rules before acting.