Promissory Note vs Bill of Exchange: What Is the Difference?

Promissory note vs bill of exchange is a common comparison in trade finance because the two instruments can appear similar. Both record an obligation to pay money, both can support commercial transactions, and both may be transferred or financed. 

The core difference is that a promissory note is a promise to pay, while a bill of exchange is an order to pay. That distinction affects who creates the instrument, who accepts the obligation, and how treasury teams can use it in working capital finance. 

Understanding the difference helps treasury teams choose the structure that best fits a payables or receivables transaction. 

Promissory Note vs Bill of Exchange: The Short Answer 

A promissory note is created by the party that promises to make payment. By contrast, a bill of exchange is created by one party to direct another party to make payment. 

The commercial outcome can sometimes look similar, but the payment obligation starts in a different direction. 

What Is a Promissory Note? 

A promissory note is a formal commitment by one party to pay another a specified amount, either on demand or at an agreed future date. 

The party making the promise is the maker or issuer. The party entitled to receive payment is the payee. 

For example, a buyer may issue a promissory note stating that it will pay a supplier £500,000 in 60 days. The note records the buyer's own commitment to make the payment. 

In a working capital structure, the supplier may transfer or finance the note instead of waiting until maturity. Therefore, promissory notes can be particularly relevant to payables finance. 

For more detail, see ETR Digital's guide to the digital promissory note. 

What Is a Bill of Exchange? 

A bill of exchange works differently. It contains an order that directs another party to pay a specified sum. 

The party creating the bill is the drawer. The party directed to make payment is the drawee. The person entitled to receive the payment is the payee. 

In a typical commercial transaction, a supplier may draw a bill of exchange on a buyer. The buyer then accepts the bill and confirms its obligation to pay on the agreed maturity date. 

Once accepted, the supplier may retain the bill until maturity or transfer it to a financing provider for earlier liquidity. 

ETR Digital's guide to digital bills of exchange explains the instrument in more detail. 

What Is the Main Difference Between a Promissory Note and a Bill of Exchange? 

The easiest way to remember the difference is to identify who initiates the payment commitment. 

With a promissory note, the debtor makes the commitment directly: 

“I promise to pay you £100,000 in 60 days.” 

With a bill of exchange, the creditor creates the instruction: 

“Pay me £100,000 in 60 days.” 

The buyer must then accept that instruction. 

This distinction shapes the transaction. In the first case, the debtor originates the promise. In the second, the creditor originates the instrument and the debtor accepts it. 

Who Are the Parties to Each Instrument? 

A promissory note usually begins with two principal parties: 

• Maker: the party promising to pay. 
• Payee: the party entitled to receive payment. 

If the note is transferred, a bank or another financing provider may later become the holder. 

A bill of exchange typically involves three roles: 

• Drawer: the party creating the bill. 
• Drawee: the party directed to pay. 
• Payee: the party entitled to receive payment. 

In practice, one commercial party may perform more than one role. For example, a supplier may draw a bill on a buyer and also be the original payee. 

Does a Bill of Exchange Need to Be Accepted? 

Acceptance is one of the most important differences between the two instruments. 

A promissory note already contains the issuer's promise to pay, so it generally does not require an equivalent acceptance step. 

A bill of exchange begins as an order to pay. Therefore, the drawee's acceptance confirms the payment obligation. 

The precise legal requirements depend on the instrument and the applicable law. However, the commercial distinction remains useful: one begins with a promise; the other begins with an order that the drawee accepts. 

How Do They Work in Working Capital Finance? 

Promissory Notes in Payables Finance 

Promissory notes can help when a buyer wants to support supplier liquidity while retaining a later payment date. 

The buyer issues a note that promises payment at maturity. The supplier can then transfer that note to a bank or another financing provider and receive cash earlier. The buyer settles the note when it matures. 

As a result, the structure can separate the supplier's funding date from the buyer's settlement date. Read more about payables finance. 

Bills of Exchange in Receivables Finance 

A bill of exchange can support the transaction from the supplier's side. 

The supplier draws the bill on the buyer. Once the buyer accepts it, the supplier holds an accepted payment obligation that it may transfer to a financing provider. 

This structure can give the supplier earlier access to cash without requiring the buyer to shorten its payment terms. Learn more in ETR Digital's guide to receivables finance. 

Which Instrument Is Better for Treasury? 

Neither instrument is automatically better. The right choice depends on the commercial structure, counterparties, and governing law. 

Treasury teams should consider: 

• who will initiate the transaction; 
• whether the objective is payables finance or receivables finance; 
• which instrument the financing provider can support; 
• which legal framework governs the transaction; and 
• how the structure will fit existing ERP, treasury, and invoice workflows. 

The most useful structure is one that provides access to liquidity without adding unnecessary operational complexity. 

Are Promissory Notes and Bills of Exchange Negotiable Instruments? 

Both can function as negotiable instruments when they are properly structured under the applicable law. 

In practical terms, negotiability allows the holder to transfer the instrument to another party. This feature matters because it can connect a payment obligation from a commercial transaction with a bank or another source of liquidity. 

Consequently, a supplier does not always need to wait until maturity. It may transfer the instrument to an eligible financing provider in return for earlier liquidity. 

This is one reason Digital Negotiable Instruments are becoming increasingly relevant to modern working capital finance. 

What Changes When the Instruments Become Digital? 

Digitisation does not remove the distinction between a promissory note and a bill of exchange. A digital promissory note remains a promise to pay, while a digital bill of exchange remains an order to pay. 

What changes is the way the parties create, sign, accept, control, transfer and track the instrument. A digital process can reduce reliance on physical documents and manual handling while improving visibility across the transaction lifecycle. 

Potential benefits include faster execution, clearer audit trails, improved traceability and more efficient transfer to financing providers. 

Legal recognition still depends on the governing law. The UNCITRAL Model Law on Electronic Transferable Records provides a framework for electronic equivalents of transferable instruments, including bills of exchange and promissory notes. However, adoption and legal requirements vary by jurisdiction. 

ETR Digital's Working Capital Notes™ support the use of digital negotiable instruments within modern working capital workflows. 

How Do Working Capital Notes™ Use These Instruments? 

Working Capital Notes™ apply established negotiable instruments to practical working capital use cases. 

Digital promissory notes can support payables finance, where the buyer issues a payment commitment that can be financed. Digital bills of exchange can support receivables finance, where the supplier creates an instrument that the buyer accepts and can then transfer. 

In both cases, the objective is to connect a genuine trade obligation with liquidity while reducing the friction associated with traditional paper-based processes. 

Promissory Note vs Bill of Exchange: A Practical Example 

Imagine a supplier sells £500,000 of goods to a buyer on 60-day payment terms. 

Using a promissory note: the buyer issues a £500,000 note that promises payment in 60 days. The supplier transfers the note to a financing provider and receives cash earlier. 

Using a bill of exchange: the supplier draws a £500,000 bill on the buyer. The buyer accepts it, and the supplier transfers the accepted bill to a financing provider for earlier liquidity. 

The economic result may look similar because the supplier receives cash sooner while the buyer pays later. However, the parties create the instruments from opposite directions. 

Frequently Asked Questions 

What Is the Main Difference Between a Promissory Note and a Bill of Exchange? 

A promissory note contains one party's promise to pay another. A bill of exchange contains an order that directs another party to make payment. Therefore, the payer initiates a promissory note, while the party expecting payment typically draws a bill of exchange. 

Which Instrument Has More Parties? 

A promissory note typically begins with two principal parties: the maker and the payee. A bill of exchange involves three roles: drawer, drawee, and payee. However, the same commercial party may hold more than one role. 

Can Both Instruments Be Transferred? 

Yes. When properly structured as negotiable instruments, both may be transferable, subject to the applicable legal framework. 

Can Promissory Notes and Bills of Exchange Be Digital? 

Yes. Digital versions can reproduce the commercial functions of paper instruments where the relevant legal and technical requirements are met. 

Promissory Note vs Bill of Exchange: Which Fits the Transaction? 

The key distinction is simple: a promissory note contains a promise to pay, while a bill of exchange contains an order to pay. 

That difference determines who originates the instrument, who accepts the obligation and how the parties structure the transaction. Yet both instruments can help turn future payment obligations into transferable assets that give businesses earlier access to liquidity. 

For treasury teams, the practical question is this: which instrument best fits the transaction, the counterparties, and the working capital objective?