Definition
Two or more persons who jointly guarantee the same debt — each co-surety is liable for their proportionate share, and if one pays more than their share, they are entitled to contribution from the others.
When two or more sureties guarantee the same debt jointly, they are co-sureties (also called co-guarantors). Co-sureties are bound to contribute equally towards debt paid (Section 146 ICA) unless otherwise agreed. If one co-surety pays more than their share, they can recover the excess from the other co-sureties — this is the right of contribution. Co-sureties may have different maximum limits of liability but still share the burden proportionately. The rule applies whether the co-sureties gave their guarantees separately or in the same instrument.
Statutory Definition
Section 146, Indian Contract Act, 1872: 'Co-sureties who are bound in different sums are liable to pay equally as far as the limits of their respective obligations allow.' Section 147: 'A co-surety who has given his consent to a contract of guarantee may be discharged by any arrangement between the creditor and the principal debtor, by which the principal debtor is released, or by any act or omission of the creditor the legal consequence of which is the discharge of the principal debtor, or by the creditor's doing any act which is inconsistent with the rights of the co-surety.'
Etymology & Origin
'Co' from Latin 'co-' (together, jointly) + 'surety.' Two persons who jointly stand surety for the same debt — together they provide the creditor a combined guarantee.
Full Legal Analysis
Co-Surety: Sharing the Guarantee Burden
Co-sureties are multiple guarantors for the same debt — the creditor has not one but two or more persons who have promised to pay if the principal debtor defaults. The legal consequences: the creditor can choose which co-surety to pursue; the co-surety who pays more than their share has a right of contribution from the others; and the discharge of one co-surety by the creditor may discharge the others.
Contribution Between Co-Sureties: Section 146
If co-sureties A and B each guarantee ₹1,00,000 and the principal debtor defaults on the full amount, A and B must each pay ₹50,000. If A pays ₹80,000 (more than their share), A can recover ₹30,000 from B as contribution. The contribution obligation: (a) arises automatically by operation of law (Section 146); (b) applies even if co-sureties gave separate guarantees at different times; (c) is proportionate to their maximum obligations (not necessarily equal amounts in absolute rupees). Section 146: 'Co-sureties who are bound in different sums are liable to pay equally as far as the limits of their respective obligations allow.'
Effect of Release of One Co-Surety
If the creditor releases one co-surety, the remaining co-sureties may be discharged pro tanto — to the extent of the released co-surety's share. This is because the remaining co-sureties' right of contribution from the released co-surety has been prejudiced by the creditor's action. The rule protects co-sureties from being left with a greater burden than they bargained for because of the creditor's unilateral dealings with one of them.
“Co-sureties stand together — their burdens are shared, their rights against each other are mutual. The law ensures that one co-surety cannot be left carrying the entire burden while another is released, without the law stepping in to restore proportionality.”
This Term in Indian Statutes
Indian Contract Act, 1872, 1872
"Co-sureties who are bound in different sums are liable to pay equally as far as the limits of their respective obligations allow."
Co-sureties share liability proportionately — equal contribution rule
