Both create personal liability of the signatory. Both can be enforced separately from the underlying contract. They work differently in court, in limitation, in enforcement. Picking the right one at contract stage — or both — turns recovery into a procedural exercise instead of a contested trial.
A written instrument containing an unconditional undertaking, signed by the maker, to pay a specific sum to a specific person (or order, or bearer), on demand or on a specific future date. When valid, a promissory note is enforceable by summary procedure under Order 37 CPC — accelerated suit, defendant must obtain leave to defend, defence on the underlying transaction is not available unless prima facie shown. The plaintiff gets a decree by default if defendant doesn't apply for leave within 10 days of summons.
A contract whereby one person promises to perform or pay for default of another. Enforceable as a regular contract. The surety's liability is co-extensive with the principal debtor's (Section 128 ICA) unless contract says otherwise. Surety enjoys statutory protections: Section 133 (any variance in contract without surety's consent discharges them), Section 139 (creditor's act impairing surety's eventual remedy discharges), Section 141 (if creditor loses security, surety discharged to that extent).
- Promissory note payable on demand: 3 years from date of execution (Article 35 Limitation Act).
- Promissory note payable on specific date: 3 years from that date.
- Personal guarantee: 3 years from the date the surety's liability arose — typically when the principal debtor defaulted.
The difference matters: a demand-payable PN starts the clock immediately on execution; a guarantee waits for the principal's default. For long-tail trade credit, the personal guarantee timeline is more forgiving; for one-shot recovery, the PN is faster to enforce.
| Feature | Promissory note | Personal guarantee |
|---|---|---|
| Procedure | Order 37 summary suit | Regular civil suit |
| Defence available | Restricted; needs leave | Available without restriction |
| Limitation start | Execution or due date | Principal's default |
| Burden on defendant | Prove payment made | Creditor proves liability |
| Typical timeline to decree | 12-18 months | 24-36 months |
Time to decree by instrument type — ₹50L claim
Bare invoice only
Personal guarantee only
Promissory note only
PN + PG combined
Funded-matter observation. PN + PG combined uses Order 37 procedure on the PN, with PG as fallback if PN is contested on technical grounds.
The strongest commercial instrument is a personal guarantee backed by a promissory note, both signed at contract stage by the same individual. The PN gives summary suit speed; the PG covers situations the PN doesn't (instalment defaults, conditional obligations); combined limitation runs from the later event; combined defences are minimal.
- PN should be on stamp paper of correct denomination (varies by state, typically ₹1 per ₹1000 of value).
- PN should be witnessed.
- PG should be in writing and signed — oral guarantees are unenforceable per Section 126 ICA.
- Both should identify the guarantor by full name, PAN, address.
- Both should specify jurisdiction for enforcement.
Indian commercial recovery is largely procedural in its outcomes. The instrument you have at the start determines the route available at the end. A claim backed by a properly-executed PN reaches decree in 12-18 months on Order 37. The same claim without it takes 30+ months on regular suit with full defence available. The cost of getting both signed at contract stage is essentially zero. The cost of not having them is years.