Contracts 101

Is an invoice a contract?

September 18, 2025
3
min
September 18, 2025
3
min
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Invoices and contracts both play critical roles in business, but they serve very different purposes and are not interchangeable.

Key takeaways

  • Invoices request payment; contracts create obligations. An invoice is a one-sided document used to ask for payment, while a contract is a legally binding agreement that sets out rights, responsibilities, and terms between parties.
  • Invoices aren’t legally binding on their own. An invoice does not create a legal obligation unless it is backed by an underlying contract that defines the agreed terms of the transaction.
  • Contracts come first, invoices follow. Contracts establish what will be delivered and paid for, and invoices are then issued to collect payment under those agreed terms — one cannot replace the other.

Invoices and contracts are incredibly important in the day-to-day running of any business so it's crucial to understand the difference between the two. 

What are they, which one are you supposed to use and when and what makes them different? Let’s find out. 

What is an invoice?

An invoice is used to request a payment from a client or customer for a given good or service. 

Typically, an invoice lays out an itemised list of products or services you have supplied to your client. It will then list the charges associated with each of these services next to them and a total for all items combined at the bottom.

Though there is no set timeframe for you to send an invoice, there will be a set date by which you expect to receive payment. An invoice may also include information on accepted payment methods, card, cheque or bank transfer. 

What format is an invoice?

An invoice could be formatted as: 

  • a paper receipt
  • a debit note
  • a sales invoice
  • an electronic record of sale or
  • a bill of sale

Nowadays, computer-generated invoices are increasingly common. They are favoured due to their ease, as they can be printed on demand or sent by email to each party. 

Automating records allow those creating an invoice to search and sort transactions by number, date, goods or client. This ultimately leads to a smoother invoice creation process. 

Are invoices legally binding?

Technically, no, invoices alone are not legally binding.

Invoices do not equal a legally binding agreement between the business and its client, nor are they considered a legal document. An invoice leaves too much room for manipulation to serve as a legal document. 

That said, if an invoice is accompanied by an official contract stating the terms and agreements of the sale or payment, then it could be considered legally binding. 

What is a contract?

A contract is a legally binding agreement between two or more parties. When signed, this agreement creates a promise that certain rights and obligations will be fulfilled by each party. Put simply, a promise is at the centre of every single contract.

There are a variety of elements of a contract that make it, unlike an invoice, legally enforceable. It’s also worth noting that an agreement does not equal a contract either, which we explore in this explainer

A contract becomes legally binding the moment all of the contract elements have been met. But before this moment, it is neither enforceable or legally valid.

A common misconception of a contract is that it has to be in writing to be binding. This is not true, in fact it just needs to include the basic elements of a contract to be valid. In fact, verbal contracts can be just as defensible as written ones. 

All of this and more can be found in our comprehensive guide to the purpose of a contract

Need help getting started? Check out our free contract templates ready to use today in Juro. 

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Whether it’s your CRM, communication platform, AI Assistant, or somewhere more exotic, Juro enables contracting to happen anywhere - right where your colleagues already work.
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Is an invoice a contract?

No, an invoice is not a contract. 

An invoice is a request for payment. It is a one-sided document that itemizes and records a transaction between a buyer and a seller. 

As opposed to a contract, which is a legally binding agreement between parties where one fulfils an obligation to the other in return for consideration

What are the differences between an invoice and a contract? 

The primary difference between a contract and an invoice is that a contract requires two people to enter an agreement. Usually, one party sets out the terms of the agreement and the other accepts.

This leads us on to another key point of difference, signing. As an invoice is solely a record of a transaction and not an agreement, there is no requirement for it to be signed for it to be valid. In contrast, a contract is invalid without a valid wet signature or an eSignature.

In contrast, an invoice is one-sided and created by one party to request payment for goods or services. This makes it a legally enforceable document, but not a legal document. 

This also works when you flip the coin, a contract cannot count as an invoice. It can stipulate that paying an invoice is a contractual obligation, but it cannot be an invoice itself. That said, a contract is not necessary if you want to issue somebody with an invoice. 

Automate your invoices and contracts with Juro 

Despite their differences, invoices and contracts are key to running a successful business and should be looked after. 

Automating this process, using Juro, can help ensure your contracting procedure is streamlined

With Juro you can: 

  • Automate invoices using our integrations with Xero, Sage and Quickbooks. Using a contract management tool, such as Juro makes it possible to automate and manage contracts and invoices, streamlining this process.

  • Sign contracts electronically. ‍Juro incorporates native electronic signing capabilities, making the signing process faster and more convenient. Parties can add that all important  legally binding signature to any contract in seconds.
  • Juro simplifies the entire contract workflow, enabling businesses to automate up to 75 per cent of routine tasks and agree contracts up to ten times faster with powerful AI.

Fill out the form below to book a personalized demo and find out more.

About the author

Sofia Tyson is the Senior Content Manager at Juro, where she has spent years as a legal content strategist and writer, specializing in legal tech and contract management.

Sofia has a Bachelor of Laws (LLB) from the University of Leeds School of Law where she studied the intersection of law and technology in detail and received the Hughes Discretionary Award for outstanding performance. Following her degree, Sofia's legal research on GDPR consent requirements was published in established law journals and hosted on HeinOnline, and she has spent the last five years researching and writing about contract processes and technology.

Before joining Juro, Sofia gained hands-on experience through short work placements at leading international law firms, including Allen & Overy. She also completed the Sutton Trust’s Pathways to Law and Pathways to Law Plus programs over the course of five years, building a deep understanding of the legal landscape and completing pro-bono legal volunteering.

Sofia is passionate about making the legal profession more accessible, and she has appeared in several publications discussing alternative legal careers.

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