How to Issue an e-Invoice? Step-by-Step Guide to Issuing e-Invoices

With the acceleration of digitalization, the era of paper invoices has largely come to an end for businesses. The e-Invoice system, implemented by the Revenue Administration, has been made mandatory to both reduce costs and decrease the informal economy. Today, for many businesses, using e-invoices is no longer a choice, but a necessity.
Date: 29 December 2025
Author: Meral İsa
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With the acceleration of digitalization, the era of paper invoices has largely come to an end for businesses. The e-Invoice system, implemented by the Revenue Administration, has been made mandatory to both reduce costs and decrease the informal economy. Today, for many businesses, using e-invoices is no longer a choice, but a necessity.

What is an e-Invoice?

An e-invoice is a digital version of a paper invoice, created, sent, received, and stored in a digital environment. Legally, it has the same validity as a paper invoice. The difference is that it is issued electronically without the need for physical processes such as printing, shipping, and archiving.

An e-invoice:

  • Is prepared in XML format in accordance with GIB (General Directorate of Revenue) standards.

  • Is transmitted to the recipient via the GIB system.

  • Is stored digitally.

  • Even if a paper printout is made, the original document is in its electronic form.

The Difference Between e-Invoice and e-Archive Invoice

e-Invoice is often confused with e-Archive invoice. The main difference between them is:

  • e-Invoice is issued between taxpayers registered in the e-Invoice system.

  • e-Archive invoice is issued to individuals or companies that are not e-Invoice taxpayers.

Therefore, if your recipient is an e-Invoice user, you should issue an e-Invoice; otherwise, you should issue an e-Archive invoice.

Who is Required to Use e-Invoices?

According to the criteria determined by the GIB (General Directorate of Revenue), the use of e-invoices is mandatory for some taxpayers. In general;

Firms whose gross sales revenue exceeds a certain limit

Businesses engaged in e-commerce activities

Those operating in sectors such as fuel, mining, automotive, alcohol, and tobacco

Businesses providing market registration system, hotel and accommodation services

are required to switch to the e-invoice system.

Requirements Before Issuing an e-Invoice

To issue an e-invoice, certain prerequisites must be met:

1. Financial Seal or e-Signature

  • Financial seal for companies

  • e-signature is required for sole proprietorships

2. GIB e-Invoice Application

e-Invoice application must be made through the Revenue Administration.

3. Choosing the e-Invoice Method

There are three different methods for issuing e-invoices:

  • GIB Portal

  • Private Integrator

  • Direct Integration

Methods of Issuing e-Invoices

1. Issuing e-Invoices via the GIB Portal

The GIB Portal is a free solution for small businesses.

Advantages

  • It is free

  • No installation required

Disadvantages

  • Requires manual processing

  • Not suitable for bulk invoice issuance

  • Inefficient for companies with high transaction volumes

2. Issuing e-Invoices with a Private Integrator

Private integrators are companies authorized by the GIB (General Directorate of Revenue).

Advantages

  • Fast and practical

  • Provides automatic accounting integration

  • All e-documents such as e-Invoice, e-Archive, and e-Delivery Note are managed from a single panel

Disadvantages

  • It is paid

3. Direct Integration

Preferred by large-scale companies.

Advantages

  • Full automation

  • Total integration with ERP systems

Disadvantages

  • High cost

  • Requires technical infrastructure and a software team

How to Issue an e-Invoice?

Now let's get to the most frequently asked question: How to issue an e-invoice?

1. Check if the Recipient is an e-Invoice Taxpayer

The recipient's registration in the e-invoice system should be checked using their tax number or Turkish Republic ID number.

2. Enter Invoice Information

  • Invoice date

  • Invoice number

  • Recipient and seller information

  • Product or service details

  • Unit price and quantity

3. Perform VAT and Tax Calculations

VAT rates, withholding tax, and other taxes must be entered correctly.

4. Approve the e-Invoice

The invoice is signed with a digital seal or e-signature.

5. Send to the Recipient via GIB

The approved e-invoice is sent to the recipient via the GIB system.

Things to Consider When Issuing e-Invoices

  • Invoices should not be issued to the wrong recipient.

  • Product and service descriptions must be clear.

  • Tax rates must be entered correctly.

  • The invoice date and time must be carefully considered.

  • Cancellation and return processes must be completed within legal deadlines.

How to Cancel and Refund an e-Invoice?

Cancellation of an e-invoice depends on the recipient's approval. The recipient can reject the invoice within a certain period. Rejected invoices are considered invalid. For accepted invoices, a return invoice must be issued.

Advantages of Using e-Invoices

  • Paper, printing, and shipping costs are eliminated

  • Invoicing processes are faster

  • Archiving is easier

  • Error rate is reduced

  • Legal compliance is ensured

  • It is environmentally friendly

e-Invoice Retention Period

e-invoices must be stored electronically for 10 years. Companies using private integrators can benefit from this storage service.

Frequently Made e-Invoice Errors

  • Incorrect tax number entry

  • Incorrect invoice type selection

  • Incorrect VAT rate entry

  • Issuing an e-Archive invoice instead of an e-invoice

Why is e-Invoicing Important for Businesses?

e-Invoicing is not only a legal requirement but also a cornerstone of businesses' digital transformation. It ensures transparency in financial processes and greatly simplifies accounting procedures.

Conclusion

The question of "how to issue an e-invoice?" is one of the fundamental issues that almost every business should know the answer to today. Issuing e-invoices with the right method and tools saves time and eliminates legal risks. By choosing an e-invoicing solution suitable for the size and transaction volume of your business, you can make the process much more efficient.