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What is an invoice

Find all that you need to know about invoices

Evolution of invoices

  • 01

    Stone invoices

    Invoices and records of transactions were made as early as 5000 BC in Mesopotamia. The merchants used to carve details of transactions on clay or stone tablets using the earliest form of math.

  • 02

    Hand-written invoices

    Invoicing later evolved to hand-written invoices on animal skin, parchment, or paper. These invoices contained most of the elements of a modern invoice and used signatures or seals.

  • 03

    Electronic invoices

    The invention of computers brought about the next big change in invoicing. This revolution was triggered by the desire to reduce traditional costs and labor. Invoicing became cheaper, easier, and faster with electronic invoices.

  • 04

    Online invoices

    The advent of the internet led to better, more secure, more green ways to communicate with clients. Online invoices are paperless as the invoices are sent through email, and payments are made online.

  • 05

    Mobile invoices

    Invoicing in the modern world has gone mobile. Specialized SaaS (Software as a Service) companies ensure that invoicing is now automated, secure, and instant, so you can invoice on the move.

Functions of invoices

Companies need to deliver invoices in order to demand payments. An invoice is a legally binding agreement showing both parties' consent to the quoted price and payment conditions. However, there are other benefits to using invoices.

  • Maintaining records

    The most important benefit of an invoice is the ability to keep a legal record of the sale. This makes it possible to find out when a good was sold, who bought it, and who sold it.

  • Payment tracking

    An invoice is an invaluable tool for accounting. It helps both the seller and the buyer to keep track of their payments and amounts owed.

  • Legal protection

    A proper invoice is legal proof of an agreement between the buyer and seller on a set price. It protects the merchant from fraudulent lawsuits.

  • Easy tax filing

    Recording and maintaining all sale invoices helps the company report its income and ensure that it's paid the proper amount of taxes.

  • Business Analytics

    Analyzing invoices can help businesses gather information from their customers' buying patterns and identify trends, popular products, peak buying times, and more. This helps to develop effective marketing strategies.

There are several different types of invoices

Pro forma Invoices

A pro forma invoice is a document that states the commitment of the seller to deliver goods and services to the buyer for an agreed-upon price.

Commercial Invoice

A commercial invoice is a document used for customs declaration in the sale of goods that are exported across international borders.

Credit notes

A credit note is a document issued to the buyer if goods are returned due to damage or mistakes.

Timesheet Invoice

A timesheet invoice is sent to a customer to charge them for work done or services rendered on an hourly basis.

Recurring Invoices

Recurring invoices are created and sent to customers at regular intervals, for repeating transactions like subscription fees.

Pro forma Invoice Template Commercial Invoice Template Credit Note Template Timesheet Template Recurring Invoice Template

Elements of an invoice

A good, legally-sound invoice should contain all the information the customer will need to make payments and provide an avenue to address any questions. Let's take a peek at the various elements of an invoice:

  • The word "Invoice" and the company logo must be prominent on the document so that they can be identified easily.

  • Every invoice must have a unique identifier like an invoice number, purchase order number, or reference number to distinguish it from the rest of the seller's invoices.

  • Recording the date of service rendered or date of sale can help simplify cataloguing.

  • The date of sending the invoice must be included to ensure payments are made on time.

  • The invoice should clearly show the seller's name and contact information to ensure the customer can contact you for any queries.

  • The client's contact info must also be included to ensure the legality of the document.

  • All the company's terms and conditions, including due dates and penalties for non-payment or partial payments, must be clearly included in the invoice.

  • The invoice must describe each product or type of service rendered.

  • The cost of each individual item or service must be included.

  • The taxable amount for the products or services must be included.

  • The total amount due for payment must be clearly included in the invoice.

  • Invoices can be personalized by including a customized thank-you note.

Elements of an invoice
The word invoice
1
Invoice number
2
Date of  service rendered
3
Date of sending invoice
4
Contact and name of org / seller
5
Name and contact of buyer
6
Terms and conditions
7
A line detailing each product or service
8
Cost per unit of product
9
Tax rates
10
Total amount owed with currency
11
A personalized note
12
  • The word "INVOICE"

    The word "Invoice" and the company logo must be prominent on the document so that they can be identified easily.

    The word invoice
  • Invoice number

    Every invoice must have a unique identifier like an invoice number, purchase order number, or reference number to distinguish it from the rest of the seller's invoices.

    Invoice number
  • Date of service rendered

    Recording the date of service rendered or date of sale can help simplify cataloguing.

    Date of  service rendered
  • Date of sending invoice

    The date of sending the invoice must be included to ensure payments are made on time.

    Date of sending invoice
  • Contact and name of org / seller

    The invoice should clearly show the seller's name and contact information to ensure the customer can contact you for any queries.

    Contact and name of org / seller
  • Name and contact of buyer

    The client's contact info must also be included to ensure the legality of the document.

    Name and contact of buyer
  • Terms and conditions

    All the company's terms and conditions, including due dates and penalties for non-payment or partial payments, must be clearly included in the invoice.

    Terms and conditions
  • A line detailing each product or service

    The invoice must describe each product or type of service rendered.

    A line detailing each product or service
  • Cost per unit of product

    The cost of each individual item or service must be included.

    Cost per unit of product
  • Tax rates

    The taxable amount for the products or services must be included.

    Tax rates
  • Total amount owed with currency

    The total amount due for payment must be clearly included in the invoice.

    Total amount owed with currency
  • A personalized note

    Invoices can be personalized by including a customized thank-you note.

    A personalized note

Tips for invoicing

Here are some tips to help you make the best use of your invoices and ensure that you get paid promptly:

  • Incentivize on-time or early invoice payments

  • Make the invoice and payment process more convenient for customers

  • Use recurring invoicing, if applicable

  • Negotiate and establish payment terms in writing

  • Get upfront payments

  • Automate invoicing

  • Work on creating closer relationships with clients

  • Hold the work or stop projects if a client doesn't pay on time

Want to learn more about how to get a customer to pay an invoice on time? Forbes has some guidelines for you.

Zoho Invoice

A Modern Invoicing Software for your Business

Handling your business becomes easy with an online invoicing software like Zoho Invoice. Using Zoho Invoice, companies can not only automate and speed up their invoicing process, but also get paid on time.

Learn more

A Modern Invoicing Software for your Business

Handling your business becomes easy with an online invoicing software like Zoho Invoice. Using Zoho Invoice, companies can not only automate and speed up their invoicing process, but also get paid on time.

Learn more

What you can do with invoice software

Find out how you can best use invoicing software in your field of work

A good invoice isn't just a sales receipt, but a legal document that protects your business against errors and risks. The right invoicing tools can help you streamline your invoicing process, improve your cash flow, and even simplify your accounting. A mobile-friendly SaaS invoicing system is an easy modern upgrade for any business that's stuck in the stone invoicing age.