Every credit transaction in business needs proof. When a buyer promises to pay later, or a seller wants a written order for payment, the law gives them specific tools for this. Two of the most common are the promissory note and the bill of exchange. Both fall under the Negotiable Instruments Act, 1881, and both let a business convert a simple debt into a document that can be enforced in court or transferred to someone else. Students often mix up the two because they look similar on paper and serve the same broad purpose: securing payment. But the difference between them shapes who is liable, how many people are involved, and what happens when payment is refused. This post breaks down that difference in plain terms, with examples drawn from everyday trade.
Table of Contents
What is a promissory note?
A promissory note is a written promise. One person, called the maker, promises to pay a fixed sum of money to another person, the payee, either on demand or at a specified future date. As defined in the Act, it is an instrument in writing containing an unconditional undertaking, signed by the maker, to pay a certain sum only to a certain person or their order, or to the bearer of the instrument, as recorded in the bare text of the law.
Suppose a small trader in Jaipur borrows ₹2 lakh from a supplier to restock inventory. Instead of a verbal assurance, the trader signs a document stating that he will pay the supplier ₹2 lakh in three months. That document is a promissory note. The trader is the maker; the supplier is the payee. No third party is involved, and the promise comes directly from the person who owes the money.
What is a bill of exchange?
A bill of exchange works differently. It is not a promise but an order. One person, the drawer, instructs another person, the drawee, to pay a certain sum to a third person, the payee, either on demand or at a fixed future time. The official definition describes it as an instrument in writing containing an unconditional order, signed by the maker, directing a certain person to pay a certain sum only to a certain person or their order, or to the bearer.
Take a textile wholesaler in Surat who supplies fabric worth ₹5 lakh to a retailer in Indore on 90 days’ credit. Instead of simply waiting for payment, the wholesaler draws a bill of exchange ordering the retailer to pay ₹5 lakh after 90 days, either to the wholesaler himself or to someone the wholesaler names. Here, the wholesaler is the drawer, the retailer is the drawee, and the payee could be the wholesaler or another party, such as the wholesaler’s bank if the bill has been discounted.
Key differences between a promissory note and a bill of exchange
The two instruments diverge on several structural points. The table below sets out the main ones side by side.
| Basis | Promissory note | Bill of exchange |
|---|---|---|
| Nature of the instrument | An unconditional promise to pay, made by the maker himself | An unconditional order to pay, given by the drawer to the drawee |
| Number of parties | Two: maker and payee | Three: drawer, drawee and payee |
| Liability of the drawer/maker | Primary and absolute; the maker himself owes the money | Secondary and conditional; the drawer pays only if the drawee dishonours the bill |
| Acceptance | Not needed, since the maker is already bound by his own promise | Usually needed from the drawee before the drawee becomes liable |
| Can the drawer/maker be the payee? | No, since a person cannot promise to pay himself | Yes, the drawer can name himself as payee |
| Notice of dishonour | Not usually required, since the maker is already primarily liable | Required to hold the drawer liable after dishonour by the drawee |
The promise versus the order
This is the starting point of every other difference. In a promissory note, the person who owes the money writes the document himself. There is no intermediary. In a bill of exchange, the person who is owed money (usually a seller) creates the instrument and directs someone else (usually a buyer) to pay. The drawer is not making a promise about his own conduct; he is issuing an instruction to a third party.
Two parties versus three
Because a promissory note only records a promise from one person to another, it needs just two parties. A bill of exchange, by contrast, needs someone to give the order, someone to carry it out, and someone to receive the payment. That third role, the drawee, exists only in a bill of exchange. Interestingly, the drawer and the payee of a bill of exchange can be the same person, something that is structurally impossible in a promissory note, since a maker cannot promise to pay himself.
Where liability sits
This is usually the trickiest part for students to grasp, and it flows directly from the promise-versus-order distinction. Under the Act, the maker of a promissory note is a principal debtor from the moment he signs it. His liability is direct and unconditional; he must pay according to the terms he wrote, and no one else’s failure changes that.
A bill of exchange places the drawee, once they accept the bill, in the position of principal debtor. The drawer’s own liability only comes into play if the drawee fails to pay. In that situation, the holder must first present the bill to the drawee and, upon dishonour, give proper notice to the drawer, as outlined in provisions on the liability of parties under the Act. Only then does the drawer become bound to compensate the holder. This is why the drawer’s liability is often described as secondary and conditional, arising only on default by the drawee, while the acceptor of the bill (the drawee who has agreed to pay) becomes primarily liable in much the same way as the maker of a note.
Acceptance and formal steps
A bill of exchange typically needs to be presented to the drawee for acceptance before it becomes fully enforceable against them, particularly when it is payable at a future date rather than on demand. A promissory note skips this step entirely, since the maker’s undertaking is binding the moment the note is signed and delivered. Both instruments, however, must be properly stamped under the Indian Stamp Act to be valid and admissible as evidence, and on dishonour, either can be formally noted and protested through a notary, a step that strengthens the holder’s legal position, as several practitioner guides on these instruments point out.
Why this distinction matters in practice
The choice between the two instruments is rarely arbitrary. A promissory note fits situations where credit flows in one direction and only one party needs to make a commitment, such as a loan between a business and a lender, or an advance from one trader to another. A bill of exchange fits trade credit, where a seller wants a formal, transferable claim on a buyer without waiting for the buyer to voluntarily offer a written promise.
The liability difference also shapes who a lender or seller chases first if payment fails. With a promissory note, there is only one person to pursue: the maker. With a bill of exchange, the holder generally looks to the drawee (once they have accepted the bill) first, and falls back on the drawer only if the drawee defaults and proper notice has been given. Businesses that deal in high-volume trade credit, such as wholesalers and exporters, often prefer bills of exchange precisely because they can be discounted with a bank before maturity, converting a future receivable into immediate cash, a practice that is central to how trade finance functions in commercial banking.
Both instruments remain central to how Indian businesses extend and secure credit, even in an age of digital payments and bank guarantees. Understanding who is bound, how strongly, and under what conditions, is what separates a document that merely looks legal from one that actually protects a business when a payment goes wrong.
What do you think? If you were running a small trading business, would you rather rely on promissory notes from your buyers or draw bills of exchange on them? And does knowing that a drawer’s liability is only secondary change how carefully you would vet a drawee before accepting a bill?
References
- https://en.wikipedia.org/wiki/Negotiable_Instruments_Act,_1881
- https://www.indiacode.nic.in/bitstream/123456789/2189/1/a1881-26.pdf
- https://live.icai.org/bos/vcc/pdf/THE_NEGOTIABLE_INSTRUMENT_ACT_1881.pdf
- https://www.adityabirlacapital.com/abc-of-money/promissory-note-vs-bill-of-exchange
- https://thelaw.institute/business-law-as-applicable-to-co-operative-ii/promissory-notes-bills-of-exchange-cheques-differences/
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