By 10 min read Last Updated: 18. March 2025
electronic invoicing

Guide: Electronic invoice

In today's technological age, electronic invoicing is inevitable.

Imagine a world without piles of paper invoices on your desk, and without the hassle of manual data entry and tracking unpaid bills.

Electronic invoicing is the key to streamlining your invoicing process and freeing up time for what really matters to your business.

But what is electronic invoicing and why should you consider it?

In this blog post, we'll delve into the world of electronic invoicing, explore the key benefits and challenges, and guide you through the process of getting started with electronic invoicing.

As invoicing service for the self-employed and entrepreneurs, we've gathered everything you need to know.

What is an electronic invoice?

An electronic invoice is a digital version of the traditional paper invoice. This type of invoice is created, sent, and received electronically through various software solutions designed to automate and simplify the invoicing process. An electronic invoice contains the same information as a paper invoice, including the invoice number, date, payment terms, and details of the products or services invoiced.

The difference between an electronic invoice and a paper invoice lies in the way it is processed. Electronic invoices are prepared and sent through digital systems, making them faster and more reliable. In addition, they can be easily integrated with accounting systems, making it easier to keep track of finances and avoid errors that often occur with manual entry.

You can also find our free invoice template here.

Electronic invoicing vs. Paper invoicing

Electronic invoicing and paper invoicing differ from each other in several ways.

E-invoicing involves digital data transfer through online invoicing systems and standardized electronic formats such as PDF, XML or EDI. The invoicing process takes place through an encrypted data exchange and makes it easy to save and search for previous invoices digitally.

Paper invoicing requires manual processing and is typically slower due to postal services. This type of invoicing simply uses physical paper invoices sent by post, which requires physical filing and manual searching.

Create a free user

An easier freelance life with Factofly

Be a freelancer without hassle and get paid without your own CVR number with Factofly. We help almost 2,000 others with an everyday life without administration.

Create a free user

How does an electronic invoice work?

Electronic invoicing makes the entire invoicing process easier and faster. It starts with you creating the invoice in a digital invoicing system. Here you enter all the necessary information and the system generates an electronic invoice that is sent directly to the recipient's e-mail or invoicing system.

When the recipient receives the invoice, they can easily import it into their own system, ensuring fast and error-free processing. Everything is done digitally, which means you get rid of paperwork and mail handling. The system keeps track of all your invoices, so you always have an overview of which have been paid and which are still outstanding.

By using electronic invoicing, you save both time and money, while also having a more efficient and transparent invoicing process. It's a smart way to keep track of finances and ensure everything runs smoothly.

The main advantages of electronic invoicing

Electronic invoicing represents a modern and efficient approach to the invoicing process, which entails a number of advantages for both companies and customers.

Here are the primary benefits of electronic invoicing:

  1. Faster and more effective treatment – Electronic invoices can be sent and received instantly, which saves time and reduces the risk of delays in payments.
  2. Error-free data – The automation of the invoicing process also eliminates the need for manual data entry, as the invoices can be automatically integrated into the company's financial system. This reduces the risk of errors and incorrect information.
  3. Direct and secure communication – Electronic invoicing increases trust between companies and their partners, as it greatly reduces the risk of lost or incorrectly delivered invoices. Security measures, such as encryption, protect confidential information during transfer.
  4. Automatic bookkeeping – Electronic invoices can be easily integrated into the company's financial system, which means less manual data entry and less risk of errors. This saves you time and money.
  5. Sustainability and environmental friendliness – Electronic invoices contribute to a more sustainable and environmentally friendly approach. By avoiding paper consumption and the transport of documents by post, the company's CO2 footprint is reduced.
  6. Traceability – Electronic invoices provide a transparent and documented overview of transactions, which is useful in the audit process.
  7. Easy organization and storage - Electronic invoices can be saved electronically and you can search for them quickly and easily, which makes it easy and functional to store and find important documents, while also saving time and resources.

Overall, electronic invoicing enables a more efficient, accurate, environmentally friendly and financially sound approach to the invoicing process, allowing both businesses and individuals to enjoy the many benefits.

Create a free user

Freelance with Factofly

Use Factofly to invoice and get paid without having your own CVR number or registered company. We handle all the boring stuff, so you can spend your time where it's the most fun.

Create a free user

Why switch to an electronic invoice?

Electronic invoicing is an effective way to save time and resources in your company. Here are the key elements that explain how:

  •       Immediate delivery – Electronic invoices are sent immediately, which significantly reduces the processing time. It simply goes faster with payments and an improved service for your customers.
  •       Automatic integration – Electronic invoices can be easily integrated directly into your company's financial system. This eliminates the need for manual data entry and minimizes the risk of errors, saving you time and money.
  •       Effective follow-up – With e-invoicing, you can easily send digital reminders and reminders. This makes the follow-up of unpaid bills more efficient and enables you to get your money home in a faster way.  
  •       Paperless office – With electronic invoicing, you no longer need to print and store physical paper invoices.
  •       Simple storage system – Electronic invoices can be easily stored and categorized electronically, making it quick to find and retrieve necessary documents when required.

Overall, electronic invoicing allows you to free up valuable time, reduce workload and improve business efficiency, resulting in better financial management and more time to focus on core business.

You can read more about the advantages of electronic invoicing here.

How do you create an electronic invoice?

Creating an electronic invoice is simple and can be done in a few steps. First of all, choose a reliable invoicing software that supports electronic invoicing. Once you have selected your software, you create a new invoice by entering all necessary information, such as the recipient's name, address, invoice date, due date, and a description of the goods or services provided.

Requirements for an electronic invoice

For an electronic invoice to be valid, it must meet certain requirements. These include:

  • Invoice number: Each invoice must have a unique number.
  • Date: The date of issue must be clear.
  • Payment terms: Enter the due date and any payment terms.
  • Recipient information: Name, address and possibly CVR number of the recipient.
  • Product description: A detailed description of the goods or services being invoiced, as well as the price and VAT.

Once all this information is in place, you can send the invoice electronically directly from your invoicing software. It makes the whole process fast and secure, while ensuring that all necessary information is correctly included.

Who can receive an electronic invoice?

Electronic invoices can be sent to both public authorities and private companies. Each type of recipient may have different requirements and procedures for receiving and processing invoices.

Electronic invoice for the public sector

Public authorities often have specific requirements for the format and content of electronic invoices. In Denmark, standardized systems such as OIOUBL are used, which ensures that the invoices can be processed efficiently and correctly. These systems require invoices to meet specific standards to be accepted. Typically, the public sector will also have specific portals or e-invoicing platforms where invoices must be uploaded. This ensures fast and safe processing and reduces the risk of errors or delays.

See our large EAN guide for the public sector.

Electronic invoice for private companies

Private companies can also receive electronic invoices, and the requirements here can vary depending on the size of the company and their internal processes. Many larger companies also use standardized systems to facilitate integration with their accounting systems. Electronic invoices can be sent via email or through specific e-invoicing platforms, which make it easy for companies to import them directly into their systems. In general, private businesses value the efficiency and accuracy that electronic invoices offer, as it reduces the need for manual handling and minimizes the risk of errors.

For both public and private recipients, electronic invoices contribute to a more streamlined and efficient invoicing process, which saves time and resources for both parties.

See our guide on how to sends an EAN invoice.

How to send an electronic invoice?

Sending electronic invoices doesn't have to be complicated, and it can save you time and resources. Follow these simple steps to get started:

Step 1 – Preparation: Start by gathering all the necessary information for your invoice. This includes your company details, customer details and possibly the specific EAN number or CVR number if relevant to your business. You can also invoice without a CVR number.

Step 2 – Choose a billing program: Choose a reliable invoicing program that supports e-invoicing. This ensures that your invoice meets all the requirements for electronic invoices and is legal and valid. Furthermore, you can adapt at any time the invoice template as required.

Step 3 – Create your invoice: Enter all necessary information in the invoicing program. This includes the invoice number, date, products or services as well as prices and VAT. It is important to double check the correctness of all information.

Step 4 – Select “Send as e-invoice”: When your invoice is ready, select the option to send it as an electronic invoice. This ensures that it is delivered quickly and safely to the recipient.

Step 5 – Confirm and Submit: Review all information one last time to make sure everything is correct. Finally, you can confirm and send the invoice. It will now be delivered electronically to the recipient with no further action required on your part.

The process may seem extensive at first, but over time it becomes a problem-free and quick routine that saves you time.

Create a free user

An easier freelance life with Factofly

Be a freelancer without hassle and get paid without your own CVR number with Factofly. We help almost 2,000 others with an everyday life without administration.

Create a free user

Electronic Invoicing: Best Practices and Tips for Success

When it comes to electronic invoicing, it's just a matter of jumping in and getting started. Here, you can benefit from the help of a bookkeeper or accountant when you need to create your first electronic invoice - in this way you ensure that everything looks correct and that you can create e-invoices with peace of mind in the future.

Regardless of whether you are a private individual or an independent trader, you can also save time and resources on your invoicing process by outsourcing the entire process to an electronic invoicing service.

Factofly as an invoicing service

When you choose Factofly as your invoicing service, you can effectively outsource the entire invoicing process, and simply invoicing without having your own CVR number.

Factofly takes care of creating, sending and following up on invoices. This frees up time and lets you focus on your core business, while you can rest assured that your invoicing is in professional hands.

In addition, Factofly also handles all necessary reports and notifications to the tax authorities, which significantly reduces the administrative burden.

This ensures that you comply with all legal requirements, including tax reporting and VAT accounting, and minimizes the risk of errors while digitizing your invoicing process.

Read more about Factofly as an invoicing service here.



By 10 min read Last Updated: 18. March 2025
electronic invoicing

Guide: Electronic invoice

In today's technological age, electronic invoicing is inevitable.

Imagine a world without piles of paper invoices on your desk, and without the hassle of manual data entry and tracking unpaid bills.

Electronic invoicing is the key to streamlining your invoicing process and freeing up time for what really matters to your business.

But what is electronic invoicing and why should you consider it?

In this blog post, we'll delve into the world of electronic invoicing, explore the key benefits and challenges, and guide you through the process of getting started with electronic invoicing.

As invoicing service for the self-employed and entrepreneurs, we've gathered everything you need to know.

What is an electronic invoice?

An electronic invoice is a digital version of the traditional paper invoice. This type of invoice is created, sent, and received electronically through various software solutions designed to automate and simplify the invoicing process. An electronic invoice contains the same information as a paper invoice, including the invoice number, date, payment terms, and details of the products or services invoiced.

The difference between an electronic invoice and a paper invoice lies in the way it is processed. Electronic invoices are prepared and sent through digital systems, making them faster and more reliable. In addition, they can be easily integrated with accounting systems, making it easier to keep track of finances and avoid errors that often occur with manual entry.

You can also find our free invoice template here.

Electronic invoicing vs. Paper invoicing

Electronic invoicing and paper invoicing differ from each other in several ways.

E-invoicing involves digital data transfer through online invoicing systems and standardized electronic formats such as PDF, XML or EDI. The invoicing process takes place through an encrypted data exchange and makes it easy to save and search for previous invoices digitally.

Paper invoicing requires manual processing and is typically slower due to postal services. This type of invoicing simply uses physical paper invoices sent by post, which requires physical filing and manual searching.

Create a free user

An easier freelance life with Factofly

Be a freelancer without hassle and get paid without your own CVR number with Factofly. We help almost 2,000 others with an everyday life without administration.

Create a free user

How does an electronic invoice work?

Electronic invoicing makes the entire invoicing process easier and faster. It starts with you creating the invoice in a digital invoicing system. Here you enter all the necessary information and the system generates an electronic invoice that is sent directly to the recipient's e-mail or invoicing system.

When the recipient receives the invoice, they can easily import it into their own system, ensuring fast and error-free processing. Everything is done digitally, which means you get rid of paperwork and mail handling. The system keeps track of all your invoices, so you always have an overview of which have been paid and which are still outstanding.

By using electronic invoicing, you save both time and money, while also having a more efficient and transparent invoicing process. It's a smart way to keep track of finances and ensure everything runs smoothly.

The main advantages of electronic invoicing

Electronic invoicing represents a modern and efficient approach to the invoicing process, which entails a number of advantages for both companies and customers.

Here are the primary benefits of electronic invoicing:

  1. Faster and more effective treatment – Electronic invoices can be sent and received instantly, which saves time and reduces the risk of delays in payments.
  2. Error-free data – The automation of the invoicing process also eliminates the need for manual data entry, as the invoices can be automatically integrated into the company's financial system. This reduces the risk of errors and incorrect information.
  3. Direct and secure communication – Electronic invoicing increases trust between companies and their partners, as it greatly reduces the risk of lost or incorrectly delivered invoices. Security measures, such as encryption, protect confidential information during transfer.
  4. Automatic bookkeeping – Electronic invoices can be easily integrated into the company's financial system, which means less manual data entry and less risk of errors. This saves you time and money.
  5. Sustainability and environmental friendliness – Electronic invoices contribute to a more sustainable and environmentally friendly approach. By avoiding paper consumption and the transport of documents by post, the company's CO2 footprint is reduced.
  6. Traceability – Electronic invoices provide a transparent and documented overview of transactions, which is useful in the audit process.
  7. Easy organization and storage - Electronic invoices can be saved electronically and you can search for them quickly and easily, which makes it easy and functional to store and find important documents, while also saving time and resources.

Overall, electronic invoicing enables a more efficient, accurate, environmentally friendly and financially sound approach to the invoicing process, allowing both businesses and individuals to enjoy the many benefits.

Create a free user

Freelance with Factofly

Use Factofly to invoice and get paid without having your own CVR number or registered company. We handle all the boring stuff, so you can spend your time where it's the most fun.

Create a free user

Why switch to an electronic invoice?

Electronic invoicing is an effective way to save time and resources in your company. Here are the key elements that explain how:

  •       Immediate delivery – Electronic invoices are sent immediately, which significantly reduces the processing time. It simply goes faster with payments and an improved service for your customers.
  •       Automatic integration – Electronic invoices can be easily integrated directly into your company's financial system. This eliminates the need for manual data entry and minimizes the risk of errors, saving you time and money.
  •       Effective follow-up – With e-invoicing, you can easily send digital reminders and reminders. This makes the follow-up of unpaid bills more efficient and enables you to get your money home in a faster way.  
  •       Paperless office – With electronic invoicing, you no longer need to print and store physical paper invoices.
  •       Simple storage system – Electronic invoices can be easily stored and categorized electronically, making it quick to find and retrieve necessary documents when required.

Overall, electronic invoicing allows you to free up valuable time, reduce workload and improve business efficiency, resulting in better financial management and more time to focus on core business.

You can read more about the advantages of electronic invoicing here.

How do you create an electronic invoice?

Creating an electronic invoice is simple and can be done in a few steps. First of all, choose a reliable invoicing software that supports electronic invoicing. Once you have selected your software, you create a new invoice by entering all necessary information, such as the recipient's name, address, invoice date, due date, and a description of the goods or services provided.

Requirements for an electronic invoice

For an electronic invoice to be valid, it must meet certain requirements. These include:

  • Invoice number: Each invoice must have a unique number.
  • Date: The date of issue must be clear.
  • Payment terms: Enter the due date and any payment terms.
  • Recipient information: Name, address and possibly CVR number of the recipient.
  • Product description: A detailed description of the goods or services being invoiced, as well as the price and VAT.

Once all this information is in place, you can send the invoice electronically directly from your invoicing software. It makes the whole process fast and secure, while ensuring that all necessary information is correctly included.

Who can receive an electronic invoice?

Electronic invoices can be sent to both public authorities and private companies. Each type of recipient may have different requirements and procedures for receiving and processing invoices.

Electronic invoice for the public sector

Public authorities often have specific requirements for the format and content of electronic invoices. In Denmark, standardized systems such as OIOUBL are used, which ensures that the invoices can be processed efficiently and correctly. These systems require invoices to meet specific standards to be accepted. Typically, the public sector will also have specific portals or e-invoicing platforms where invoices must be uploaded. This ensures fast and safe processing and reduces the risk of errors or delays.

See our large EAN guide for the public sector.

Electronic invoice for private companies

Private companies can also receive electronic invoices, and the requirements here can vary depending on the size of the company and their internal processes. Many larger companies also use standardized systems to facilitate integration with their accounting systems. Electronic invoices can be sent via email or through specific e-invoicing platforms, which make it easy for companies to import them directly into their systems. In general, private businesses value the efficiency and accuracy that electronic invoices offer, as it reduces the need for manual handling and minimizes the risk of errors.

For both public and private recipients, electronic invoices contribute to a more streamlined and efficient invoicing process, which saves time and resources for both parties.

See our guide on how to sends an EAN invoice.

How to send an electronic invoice?

Sending electronic invoices doesn't have to be complicated, and it can save you time and resources. Follow these simple steps to get started:

Step 1 – Preparation: Start by gathering all the necessary information for your invoice. This includes your company details, customer details and possibly the specific EAN number or CVR number if relevant to your business. You can also invoice without a CVR number.

Step 2 – Choose a billing program: Choose a reliable invoicing program that supports e-invoicing. This ensures that your invoice meets all the requirements for electronic invoices and is legal and valid. Furthermore, you can adapt at any time the invoice template as required.

Step 3 – Create your invoice: Enter all necessary information in the invoicing program. This includes the invoice number, date, products or services as well as prices and VAT. It is important to double check the correctness of all information.

Step 4 – Select “Send as e-invoice”: When your invoice is ready, select the option to send it as an electronic invoice. This ensures that it is delivered quickly and safely to the recipient.

Step 5 – Confirm and Submit: Review all information one last time to make sure everything is correct. Finally, you can confirm and send the invoice. It will now be delivered electronically to the recipient with no further action required on your part.

The process may seem extensive at first, but over time it becomes a problem-free and quick routine that saves you time.

Create a free user

An easier freelance life with Factofly

Be a freelancer without hassle and get paid without your own CVR number with Factofly. We help almost 2,000 others with an everyday life without administration.

Create a free user

Electronic Invoicing: Best Practices and Tips for Success

When it comes to electronic invoicing, it's just a matter of jumping in and getting started. Here, you can benefit from the help of a bookkeeper or accountant when you need to create your first electronic invoice - in this way you ensure that everything looks correct and that you can create e-invoices with peace of mind in the future.

Regardless of whether you are a private individual or an independent trader, you can also save time and resources on your invoicing process by outsourcing the entire process to an electronic invoicing service.

Factofly as an invoicing service

When you choose Factofly as your invoicing service, you can effectively outsource the entire invoicing process, and simply invoicing without having your own CVR number.

Factofly takes care of creating, sending and following up on invoices. This frees up time and lets you focus on your core business, while you can rest assured that your invoicing is in professional hands.

In addition, Factofly also handles all necessary reports and notifications to the tax authorities, which significantly reduces the administrative burden.

This ensures that you comply with all legal requirements, including tax reporting and VAT accounting, and minimizes the risk of errors while digitizing your invoicing process.

Read more about Factofly as an invoicing service here.