How to Invoice a Company: Steps and Examples

In a rapidly evolving digital landscape, invoicing has become more than just a clerical task. With 67% of accountants preferring cloud accounting and 80% of small-to-medium businesses (SMBs) expected to rely exclusively on cloud accounting software by 2025, it’s evident that digital solutions are reshaping the invoicing process. This transformation involves understanding not just invoices but also preliminary documents like quotes and estimates. (Further reading : Learn the key differences between a quote and an estimate to plan your projects better.)

Invoicing, especially for small businesses or independent contractors, often presents unique challenges. Without the support of a dedicated accounting department, like those found in larger companies, the task can become overwhelming. In fact, 53% of midmarket B2B companies still rely on spreadsheets for their accounts receivable, indicating a significant opportunity for digitization and streamlining.

But don’t worry, we’ve got you covered! Here at Appvizer, we’ll walk you through all the steps and details you need to know in order to invoice companies for your hard-earned cash.

As with regular invoices, there are various elements and details that you have to include to properly bill companies. However, bigger companies normally have a dedicated accounting department full of on-staff experts that do all this, but since you’re reading this you probably don’t have the same luxury. 

The first step in invoicing a business or company is to identify which professional invoice you’ll need to use. Is it a standard invoice for simple billing? Or, is it something more complex like a debit invoice? 

Just in case you don’t already have all the types of invoices memorized (just kidding), here’s a small list of the different kinds of invoices: 

• Credit Invoice: An invoice used to give customers a refund, discount, or to correct some mistake made during the billing process. For instance, If a customer was overcharged in a previous invoice due to a pricing error, a credit invoice would be issued to rectify this and adjust their account balance.
• Debit Invoice: Used to increase the previous amount billed. Let's say If additional services were provided after the initial billing, a debit invoice would be sent to cover these extra costs.
• Mixed Invoice: As the name suggests, it’s a mix of both credits and debits. It's mostly used in case of a project that had additional charges but also required a refund for a certain aspect, both these adjustments would appear on a mixed invoice.
• Timesheet Invoice: Lists the time and hourly rate billed to the company. For instance, a consultant might use a timesheet invoice to bill for hours spent on a client project, with a detailed breakdown of hours worked each day.
• Pro Forma Invoice: An invoice provided before services are finished, giving an estimate of time and cost. For a deeper understanding and a free template, explore our complete guide to proforma invoices.
• Interim Invoice: Generally used for bigger projects where multiple payments have been agreed to after passing certain milestones.  It's mostly used in construction projects.

💡 Note: There are a few other types, but they’re pretty self-explanatory. Although, for international trade contexts, understanding the differences between Proforma and Commercial Invoices is crucial.

So with this, you should make sure that you understand how each invoice type may benefit you and your company. The advantages are multiple : 

• Improved Cash Flow: Selecting the correct invoice type ensures timely and accurate billing, which in turn improves cash flow management.
• Professionalism: Using the appropriate invoice demonstrates professionalism and attention to detail, enhancing your business’s reputation.
• Reduced Errors: Understanding the nuances of each invoice type can significantly reduce billing errors and the need for corrections later.
• Better Customer Relationships: Clear and correct invoicing contributes to transparent and positive relationships with your clients.

This might seem pretty obvious, the second step after figuring out what kind of invoice to use is to actually label it as an invoice. So clearly label the document as an "Invoice" to avoid confusion with quotes or other communications. You’d be surprised by how many people forget to do that… Use a bold, larger font for the title and place it at the top of the document for immediate visibility.

Although most of these steps may seem self-evident, sometimes we skip over the most basic things. Along with the title, you should put your business information.

Common information can include a logo (if you have one), your business’s name, a slogan (again, if you have one), address, and finally your contact information (phone number and email address). 

Next, typically below your business information, you’ll want to include the client’s information. Just like you did for your business, you’ll want to include the client’s name, address, and contact information. 

In this case, the client information will look more like your own business information, because your customer is another business. 

💡 Note: The more details the merrier, including more customer information allows you to easily organize and contact clients. For repeat clients, double-check for any changes in their details to ensure accuracy.

Speaking of organization, another way to set up a seamless organizational system of customer information is by assigning each client, and their order, a unique invoice number. By keeping and giving out unique invoice numbers, you can easily pull up specific transaction information in seconds. 

💡 Note: Consider a system that combines dates or project codes with numbers for easier tracking (e.g., INV-202204-001).

Don’t forget to include the send date of the invoice at the top as well.  Don’t forget to add the due date for payment, clearly marked to avoid any confusion.

After you’ve finished with the main details at the top, move down the page and make a table with multiple columns.

One column should include the type of service you provided and a brief description. Understand the key differences between related documents like purchase orders and invoices for better clarity. The second one should include either quantity if you’re charging for materials, or hours worked if you're charging only for the service itself. It’s also common to just split up the column showing the costs for service work or the quantity. 

Next, you should list either the unit price or, in most cases, your rate of pay. Finally, you should include the subtotal. 

Below the breakdown of the cost of services provided and total cost, you should explicitly list the payment methods you accept, and the ones you don’t.

You can even mention your preferred payment, and maybe even offer an incentive like a slight discount for example. It’s also a good idea to include a link to the payment portal, or a third-party portal like Paypal or Square if you’re sending a digital invoice.

Don’t forget to include your payment terms, like the due date and any late fees. 

Once you’ve included all necessary details, you're ready to send it. For more insights on this process, see our guide on how to fill out an invoice in easy steps.

More likely than not, you’ll probably be sending it digitally, so you’ll need to attach it to an email. There are a variety of ways you could write the email, but here’s an example to give you a general idea of what it should look like: 

Hello, “customer name”, 

Hope you’re doing well. Attached you’ll find an invoice for the “project details”. We really appreciate your business and hope to speak with you soon. 

If you have any questions or concerns regarding the invoice or payment, please feel free to contact me anytime. 

Best Regards, 

“Your name” 

• Regular Follow-ups: Don't hesitate to send polite reminders as the due date approaches, especially for larger sums.
• Record Keeping: Maintain copies of all invoices sent for financial record-keeping and tax purposes.
• Legal Clarity: Ensure your invoices comply with legal requirements in your region, including tax details if applicable.
• Feedback Loop: Encourage clients to confirm receipt of the invoice to avoid “lost in the mail” issues.

Not everybody’s like you and took the time to read how to correctly put together an invoice for a company. So, inevitably there are frequent mistakes that people make when creating invoices, here are some to avoid: 

Your invoices should all look alike, the template at least. While the numbers and specific details may be different, the rest should be the same. 

Having streamlined templates that you can easily modify for different companies and projects doesn’t just make life easier, ​​it can also help your overall brand experience and show any client that you have a streamlined experience. 

Some people neglect to specifically mention which payment methods they do and do not accept, which can cause headaches for both you and the company. For example, if you accept credit cards but don’t accept American Express, write that! Don’t make the company guess, it’ll save both you and the company time. 

Payment terms are also another important part of the equation. Being upfront with the company you’re doing business with not only saves you time but is just good business.

Transparency is always a good idea. So, in addition to discussing payment terms directly with the company, you should add it to your invoices, mentioning things like the due date and any related fees. 

This might be the most devastating mistake, especially for your livelihood. You’ll need a different tracking system depending on what you do.

If you’re selling products to a company, then by all means it’s highly advisable to keep track of what items you sold. If you’re providing services like repairs or construction then you’ll need a system where you can track how many hours you’ve worked, and also materials used if you plan on charging for that too.  

Save yourself the hassle, and set up a tracking system, so you can accurately bill the company you’re working for. 

Invoicing as a Contractor

Compared to even a small business, invoicing for an independent contractor, or a freelancer is bound to be harder. With no one else to verify the invoices you make, it’s a lot easier to make careless and potentially big mistakes. Even if you feel like you don’t have the talent for it, it just takes a bit of practice!

All the steps and details we mentioned in this article also apply to you as a contractor. The one main exception is that you’re more likely to work and be paid based on your hourly rate and the number of hours worked. Therefore, take extra care to make sure you’re accurately counting and recording how many hours you’ve worked as well as the materials used if you intend on charging the company for it.  

Invoicing Companies  

In this article, we’ve explored the invoicing process in detail. Additionally, understanding the difference between an invoice and a receipt is equally important for comprehensive financial management.. As we hope you’ve seen, invoices are a crucial part of the payment process, and to getting you the money you deserve. 

If you don’t feel like you’ve mastered all the specifics of invoicing with this article, don’t fret, you can always use an invoicing software program that automates and creates invoices in seconds, so you don’t have to worry about them. Check out our top picks on our directory page!