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What Is an E-Invoice?

July 8, 2026



Today, digitalization continues at great speed in the business world. It should be noted that accounting and finance processes have become much easier with digitalization. One of the most important conveniences of digital transformation is the e-invoice system. Especially with Key Online, the e-invoice system has become much more advantageous for businesses. Before discussing these advantages, let us explain what an e-invoice is and what differences exist between it and a paper invoice. 

What Is E-Invoice?

A digital invoice that can be issued online, sent online, and stored online is called an e-invoice. From a legal perspective, paper invoices and e-invoices have the same validity. This is because e-invoice is recognized by the Turkish Tax Procedure Law. Since it is created electronically, it can be sent to individuals, institutions, and organizations over the internet. At the same time, it is also possible to store e-invoices digitally and access them whenever needed. 

It should also be noted that the e-invoice system in Turkey is operated through a platform managed by the Revenue Administration, known as GİB. It is completely legal, and all businesses that wish to do so can choose to issue e-invoices just as they can carry out their invoicing processes through paper invoices. Of course, for an e-invoice to have legal validity, it must be prepared according to certain standards. It must also be submitted to the GİB system, and once the system approves the invoice, it can be delivered to the final recipient. 

What Are the Differences Between E-Invoice and Paper Invoice? 

In general, we can summarize these differences in a few points. 

  • E-invoice is prepared and sent digitally. Paper invoices require printed copies. 

  • The invoice delivery process is much easier with e-invoice because it can be sent by email. Paper invoices, however, must be sent by post or cargo. 

  • E-invoice is much more cost-effective. Paper invoices require printer, paper, envelope, and postage expenses. 

  • Paper invoices are more difficult to preserve, and when there is an audit or when an invoice needs to be examined, accessing them takes time. E-invoices stored digitally eliminate these problems. 

How Does E-Invoice Work?

In general, we can summarize the stages of the e-invoice process as follows: 

  1. System Registration and Authorization

Businesses using e-invoice must register with GİB. With registration, the digital certificates required to access the e-invoice system are obtained. The certificate allows the business to sign the invoice securely and in a legally valid way. 

  1. Invoice Creation

The e-invoice is prepared digitally in the specified format. This allows both GİB and the invoice recipient to open the invoice digitally as well. 

  1. Sending to GİB

The created invoice is sent to GİB through the system, and after it is approved by GİB, it can be delivered to the recipient. 

  1. Archiving

Just like paper invoices, e-invoices must also be stored as required by law. This period is usually around 10 years, and invoices can be preserved digitally. 

What Are the Advantages of E-Invoice? 

In recent years, businesses have switched to e-invoice very rapidly. The main reason for this is that using e-invoice is more advantageous for businesses in many ways, and we can give the following examples of these advantages: 

  • E-invoice saves time because both its preparation and delivery are completed in a much shorter time. 

  • The cost of e-invoice is much lower. Both printing and delivery costs are eliminated. 

  • E-invoice complies with legal obligations and regulations, and it also makes audit processes easier. This is because any archived invoice can be accessed much more easily when needed. 

  • E-invoices can be tracked much more easily. 

E-Invoice Process Management with Key Online

Those who want to switch to e-invoice should first turn their attention to Key Online, as it allows them to benefit from important conveniences. Key Online is a solution platform developed to simplify businesses’ accounting, finance, and e-invoice processes, and it stands out with its cloud-based structure. With the Key Online pre-accounting program, processes such as creating, approving, and archiving e-invoices, e-dispatch notes, and other digital documents can be easily carried out and managed. Moreover, managing all these processes through a single platform is a major convenience on its own.  

Key Online’s E-Invoice Advantages

Take a quick look at the advantages gained with Key Online e-invoice! 

  • It is possible to manage all accounting and e-document processes through a single panel. E-invoices can be prepared and sent quickly and easily. 

  • Automatic invoicing can be performed because Key Online is a program that also offers e-commerce integration. This makes it possible to transfer orders to the accounting system. 

  • Key Online creates, approves, and securely stores your e-invoices in accordance with GİB standards. It is possible to access invoices easily when needed.