What to Include in an Invoice

Carolyn Jul 11, 2026

When it comes to running a business, one of the most crucial aspects is ensuring that your finances are in order. This is where invoices come into play. An invoice is a formal document that outlines the details of a sale transaction, serving as a record and a request for payment. However, what exactly do you include in an invoice? Let's delve into the essential elements that make up a comprehensive and professional invoice.

an invoice is shown with the words, what's included and how to use
an invoice is shown with the words, what's included and how to use

First and foremost, an invoice should clearly state that it is indeed an invoice. This can be achieved by including the word 'Invoice' at the top of the document, often in a larger font size to make it stand out. Additionally, you might want to include a unique invoice number to help with tracking and organization.

11 Things to Include on a Professional Business Invoice
11 Things to Include on a Professional Business Invoice

Mandatory Invoice Information

Every invoice should contain certain mandatory information to ensure it's legally sound and useful for record-keeping purposes.

an invoice form with the words invoice written on it
an invoice form with the words invoice written on it

Company Information

Start by including your company's name, address, phone number, email address, and website (if applicable). This helps your client identify who the invoice is from and how to contact you if needed.

two types of invoices that are used to describe what is invoice
two types of invoices that are used to describe what is invoice

If you're a registered business, you should also include your business registration number or tax ID. This is crucial for tax purposes and helps build credibility with your clients.

Client Information

Next, include the client's name and address. If you're billing a specific department or person within a company, include that information as well. This ensures that the invoice reaches the right person and helps with future reference.

Free Invoice Template  | Download for free
Free Invoice Template | Download for free

If the client is a registered business, it's a good idea to include their business registration number or tax ID as well. This can help streamline your accounting processes and ensure accurate record-keeping.

Invoice Details

Now that the header information is out of the way, it's time to get into the specifics of the invoice.

How to write an invoice
How to write an invoice

Invoice Date

The invoice date is the date when the invoice was created. This is important for tracking purposes and can also affect the due date for payment.

an invoice is shown on top of a piece of paper
an invoice is shown on top of a piece of paper
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the invoice receipt is displayed on a white background
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an invoice form is shown with the company's name and address on it
an invoice form is shown with the company's name and address on it
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a stack of papers with the words simple tips to organize your invoice process
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If you're using an accounting system or software, the invoice date should automatically be included. However, if you're creating invoices manually, make sure to include this important detail.

Payment Terms

Clearly state your payment terms on the invoice. This includes the due date for payment, accepted payment methods, and any late fees or discounts for early payment.

For example, you might state something like 'Net 30: Payment due within 30 days of receipt. Accepted payment methods: Check, Credit Card, PayPal. Late fees may apply.'

Line Items

The heart of any invoice is the line items section. This is where you list the products or services you've provided, along with their respective quantities, prices, and taxes.

Product/Service Description

For each line item, provide a clear and concise description of the product or service. This helps the client understand exactly what they're being billed for.

For example, instead of 'Design', you might write 'Website Design - Homepage & Interior Pages'.

Quantity, Price, and Tax

Next to each description, include the quantity of the product or service provided, the price per unit, and any applicable taxes.

For example, you might have 'Quantity: 1', 'Price: $500', and 'Tax: $45 (10%)'.

If you're using accounting software, these calculations should be automated. However, if you're creating invoices manually, make sure to double-check your math to avoid errors.

Subtotal, Tax, and Total

At the bottom of the line items section, calculate the subtotal by multiplying the quantity by the price for each line item and summing them up.

Next, calculate the total tax by applying the tax rate to the subtotal. Finally, add the subtotal and total tax to get the grand total.

Here's an example of how this might look:

Subtotal $2,500
Tax (10%) $250
Total $2,750

Including these calculations on your invoice helps ensure that your client understands exactly how the total amount was arrived at, reducing the likelihood of disputes.

Additional Information

Depending on your business and the nature of the transaction, you might want to include additional information on your invoice.

Payment Instructions

If your payment terms aren't clear, or if you want to provide additional guidance, consider including payment instructions. This could include your bank account details, a link to your online payment portal, or instructions for sending a check.

Thank You Note

A simple thank you note can go a long way in building client relationships. Consider including a brief, polite note expressing your gratitude for their business.

For example, you might write 'Thank you for your business. We appreciate your continued support.'

Invoicing might seem like a straightforward task, but including the right information is crucial for getting paid promptly and maintaining accurate records. By following the guidelines outlined above, you can create professional, comprehensive invoices that serve their purpose effectively.

Moreover, consider using accounting software or invoicing tools to streamline your invoicing process. These tools can automate many of the tasks outlined above, saving you time and reducing the risk of errors.

Remember, every business is unique, and your invoices should reflect that. Don't be afraid to customize your invoices to fit your brand and the needs of your clients. With the right approach, invoicing can be a smooth, efficient process that contributes to the success of your business.