Confusion between the concept of a tax invoice and an electronic invoice frequently occurs; some business owners treat them as two different types of invoices, while others believe that adding Value Added Tax (VAT) to any invoice automatically makes it electronic.

However, the distinction between a tax invoice and an electronic invoice relates to two different aspects: the tax invoice determines the nature of the document and its required tax data, while the electronic invoice refers to the method by which the invoice is generated, stored, and processed electronically. Therefore, a tax invoice can simultaneously be an electronic invoice if issued through a compliant electronic system.

The Zakat, Tax and Customs Authority (ZATCA) clarifies that an electronic invoice is an invoice document that is issued and saved electronically in a structured format, and that the e-invoicing system includes two types of tax invoices: the Tax Invoice and the Simplified Tax Invoice.

This guide reviews the practical differences between the two terms, the scenarios where each type is used, their key data requirements, their connection to e-invoicing and VAT, and the role of an appropriate accounting system in managing this process more accurately.

What is a Tax Invoice?

A tax invoice is a document that proves the supply of goods or services, containing the necessary commercial and tax data to verify the transaction and determine the amount of VAT due on it.

It is commonly issued in transactions that take place between one business and another (B2B), provided it includes the data and elements required for tax invoices. ZATCA has clarified this usage within its official definition.

Data that may appear on a tax invoice includes:

• Supplier's name.
• Supplier's address.
• Tax Identification Number (TIN).
• Required buyer data.
• Invoice number.
• Invoice issue date.
• Date of supply if different.
• Description of goods or services.
• Quantities.
• Unit price.
• Discounts.
• Taxable amount.
• VAT rate.
• Tax amount.
• Final total.

The function of a tax invoice is not merely to display the tax amount; it is also linked to the establishment's accounting cycle. Through it, sales can be recorded, customer accounts registered, output and input taxes calculated, and the transaction linked to inventory.

For more details on requirements, elements, and issuance mechanisms, you can review the Tax Invoice Guide in Saudi Arabia.

What is an Electronic Invoice?

An electronic invoice is a document that is created and saved in a structured electronic format by an electronic system, containing the requirements of a tax invoice according to the nature of the transaction.

A paper invoice does not become an electronic invoice simply by photographing it, scanning it, and saving it on a computer. Likewise, preparing a manual document and converting it into an image or digital file does not meet this definition; the fundamental requirement is that the invoice is generated through a structured electronic solution.

The e-invoicing system aims to shift the issuance of invoices, as well as debit and credit notes, from a paper-based method to an organized electronic process that allows for data processing and exchange between the buyer, the seller, and relevant systems.

The e-invoicing cycle includes the following:

1. Creating the invoice via the system.
2. Entering customer information.
3. Registering products or services.
4. Calculating the tax value.
5. Generating the necessary technical data.
6. Issuing the invoice.
7. Integrating with the Fatoora platform when Phase 2 requirements apply.
8. Saving the invoice in an electronic format.
9. Processing returns through credit and debit notes.
10. Maintaining a log of operations.

To learn more about the system, you can refer to the Electronic Invoice Guide.

Difference Between Tax Invoice and Electronic Invoice

The difference between a tax invoice and an electronic invoice is that the former relates to the type of document and the tax data it holds, while the latter relates to the electronic method by which the invoice is generated, saved, and processed.

Thus, the two terms do not represent opposing or mutually exclusive concepts.

An invoice can be:

Both tax and electronic at the same time.

This is the standard form currently for establishments subject to e-invoicing requirements in Saudi Arabia, as the tax invoice is created via a compliant electronic system.

Comparison Element	Tax Invoice	Electronic Invoice
Concept	A tax-type document	Method of issuing, saving, and processing the invoice
Main Goal	Proving supply and tax	Converting the invoicing process to a digital procedure
Focus	Commercial and tax data	System, format, and electronic exchange
Usage	Mostly in B2B transactions	Used in B2B and B2C
Issuance Method	Through an electronic system currently when subject to regulations	Issued electronically
Value Added Tax (VAT)	A fundamental part of the taxable transaction	Processed according to the invoice type
Types	Tax and Simplified Tax	Includes both types when issued electronically
Related Documents	Credit or debit notes	Notes are issued electronically
Fatoora Platform	Falls under the e-invoicing system	Integrated according to the implemented phase
Accounting Relationship	Proves the sale and tax transaction	Links invoicing to the electronic system

One of the inaccurate questions frequently asked is: Should I use a tax invoice or an electronic invoice?

In many cases, it is not a choice between two separate types, because the transaction may require issuing an electronic tax invoice that combines the tax nature of the document with the electronic issuance mechanism.

Is a Tax Invoice the same as an Electronic Invoice?

No, the definitions differ, though they can merge into a single document.

To simplify the difference:

• Tax = What is the nature of the data and tax obligations contained in the document?
• Electronic = How was the invoice created, saved, and processed?

ZATCA states that an electronic invoice encompasses the requirements of a tax invoice, then distinguishes within the system between a Tax Invoice and a Simplified Tax Invoice.

What is an Electronic Tax Invoice?

An electronic tax invoice is a tax invoice that contains the necessary tax data and is created, saved, and processed by an e-invoicing system.

This is where the two concepts meet in a single document.

For example, if a software company provides a service to another VAT-registered company, the system can generate:

• Supplier data.
• Buyer information.
• Tax Identification Number (TIN).
• Service description.
• Supply value.
• Value Added Tax (VAT).
• Total amount.
• Required technical data.

The document is then issued through the electronic system and handled according to the requirements applicable to the establishment.

In this case, the invoice is:

Tax-related because it proves the transaction and its associated tax.

And electronic because it was created and processed via an electronic system.

What is the Difference Between a Tax Invoice and a Simplified Tax Invoice?

This classification differs from comparing a tax invoice and an electronic invoice, so the two concepts should not be confused.

A Tax Invoice and a Simplified Tax Invoice represent two types within the electronic tax invoicing system.

ZATCA clarifies that a tax invoice is generally issued for transactions between businesses (B2B), while a simplified tax invoice is mostly used when selling from a business to an individual consumer (B2C).

Point of Comparison	Tax Invoice	Simplified Tax Invoice
Typical Usage	B2B	B2C
Buyer	Usually a company or establishment	Usually an individual consumer
Level of Detail	More detailed	Simpler data
Buyer Data	Highly required	Less detailed
Common Use Cases	B2B supply transactions	Stores, restaurants, and retail
E-invoicing	Yes	Yes
Phase 2 Integration	Subject to Clearance mechanism	Subject to Reporting mechanism

ZATCA officially classifies the Tax Invoice and the Simplified Tax Invoice as the two main types within the e-invoicing system.

When is a Tax Invoice Used?

A tax invoice is typically used when a supply transaction occurs between two establishments, especially when the buyer needs to prove the transaction and the tax in their accounting records.

Example:

If an equipment distribution company sells to another company for 20,000 SAR before VAT.

In this case, the buyer needs a document showing:

• Supplier's name.
• Supplier's TIN.
• Buyer's data.
• Product details.
• Value before tax.
• VAT amount.
• Total.

It is important to ensure the accuracy of the client’s information because the invoice becomes part of both parties' accounting and tax records.

When is a Simplified Tax Invoice Used?

A simplified tax invoice is usually issued for direct sales to a consumer, examples include:

• Restaurants.
• Cafes.
• Supermarkets.
• Clothing stores.
• Pharmacies.
• Retail shops.
• Businesses relying on point-of-sale systems.

ZATCA states that this type is mostly issued from a business to an individual, containing the basic elements required for simplified invoices.

Therefore, businesses executing a large volume of daily sales need a POS system integrated with accounting and e-invoicing instead of relying on manual entry for each invoice.

Restaurants and cafes can also benefit from a restaurant and cafe management system to connect orders, POS, accounting, and inventory with e-invoicing.

What is the Relationship Between VAT and a Tax Invoice?

A tax invoice proves the supply value and its associated VAT, and the data from these invoices is later used in the establishment's tax records and reports.

VAT is an indirect tax imposed on goods and services, with classifications and exemptions that vary based on the nature of the supply.

Therefore, the accounting system must be able to:

• Determine the tax treatment of an item.
• Calculate the tax.
• Handle tax-inclusive or tax-exclusive pricing.
• Calculate discounts correctly.
• Record output tax.
• Record input tax.
• Process returns.
• Generate tax reports.

To learn about the tax calculation mechanism, registration thresholds, and filing returns, you can refer to the Value Added Tax Guide in Saudi Arabia.

What is the Difference Between an Electronic Invoice and a Paper Invoice?

An electronic invoice is created and saved by a structured electronic system, while a paper invoice relies on preparing and handling the document in paper form.

Key differences include:

Element	Electronic Invoice	Paper Invoice
Creation	Via electronic system	Manual or paper
Storage	Electronic	In paper files
Search	Quick search within the system	Searching through physical archives
Accounting Integration	Direct in integrated systems	Requires manual data entry
Data Sharing	Organized and automated	Done manually
Saudi E-invoicing	Complies with requirements when using a compatible system	Does not meet system requirements

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The first phase of electronic invoicing in Saudi Arabia launched on December 4, 2021, requiring applicable taxpayers to issue and save invoices using a compliant electronic system.

Is a PDF file considered an electronic invoice?

Merely saving or sending an invoice as a PDF format does not necessarily mean it is an electronic invoice that meets the requirements.

What matters is how the invoice was generated, and whether it was issued from a compliant accounting software and includes the required elements.

If an invoice is manually prepared then photographed or scanned, it does not become an electronic invoice under ZATCA's definition.

With the transition to the integration phase, additional technical requirements regarding the format and data produced by the system emerge. Therefore, the invoicing system itself must be examined, rather than just looking at the file format the client receives.

How does Phase Two relate to the difference between a tax and an electronic invoice?

Phase Two clarifies the relationship between the two concepts even further, linking tax invoices to an integrated electronic system with the Fatoora platform.

Phase Two, known as the Integration Phase, began rolling out gradually on January 1, 2023. During this phase, targeted taxpayers' e-invoicing solutions must integrate with ZATCA's systems and issue invoices in the specified format.

Thus, the process is no longer limited to generating an invoice containing tax, but also includes:

• Generating required data.
• Issuing the document electronically.
• Setting up the issuance unit.
• Integrating with the Fatoora platform.
• Sending document data.
• Receiving processing results.
• Saving the document and the response result.

Details about this phase can be reviewed through the Phase Two of Electronic Invoicing Guide.

A Practical Example Explaining the Difference Between a Tax Invoice and an Electronic Invoice

Suppose Company "A" sold equipment to Company "B" for 10,000 SAR before calculating VAT.

If the transaction is subject to a 15% rate:

• Supply Value: 10,000 SAR.
• VAT: 1,500 SAR.
• Total: 11,500 SAR.

From the Tax Invoice perspective:

The document must clarify the transaction data, supplier, buyer, supply value, tax, and total.

From the Electronic Invoice perspective:

This data must be generated via an electronic system, saved, and processed according to specified requirements, applying Phase Two procedures if the establishment is subject to them.

Consequently, the same document can be described as:

An electronic tax invoice for 11,500 SAR.

This example confirms that placing the tax invoice and the electronic invoice in comparison as mutually exclusive options is not the right way to understand the relationship between them.

The Difference Between Tax and Electronic Invoices from an Accounting Perspective

Accountingly, the tax invoice represents the document proving the transaction, while e-invoicing represents the technical environment that creates this document and links it to the rest of the workflow stages.

When issuing an invoice through an integrated accounting system, several processes can be executed automatically, including:

1. Proving sales value.
2. Proving output tax.
3. Updating the customer's balance.
4. Recording the payment method.
5. Deducting inventory quantity.
6. Calculating the cost of goods sold.
7. Generating journal entries.
8. Updating sales reports.
9. Updating tax reports.
10. Saving the invoice.

This is a primary reason why relying on a limited program just for printing invoices is insufficient when a company’s operations and workflow are more complex.

Key Mistakes Resulting from Confusing Tax and Electronic Invoices

Believing that adding 15% makes the invoice electronic

Displaying the tax on the document means it includes tax processing, but this alone does not mean it meets e-invoicing requirements.

Considering an electronic invoice as an alternative type to a tax invoice

The more accurate description is that the word "electronic" relates to the method of issuing the invoice, while "tax" refers to the type of document.

Using Word or Excel to issue invoices

Creating a document manually using word processing or spreadsheet software does not make it compliant with e-invoicing system requirements. Furthermore, Phase One mandates that included taxpayers use a compliant electronic solution.

Sending a picture of a paper invoice

Scanning a paper document and converting it into an image does not make it an electronic invoice according to the Authority's definition.

Confusing Tax Invoices with Simplified Tax Invoices

The invoice type is determined by the nature of the transaction and the buyer’s status; therefore, automatically adopting the same type for all customers is incorrect.

Modifying the original invoice after issuance

Subsequent modifications are handled through credit and debit notes according to the system's requirements, rather than making unregulated changes to the original invoice record. These notes fall under the official concept of electronic invoicing.

How do I know if an electronic invoice is valid?

The validity of an electronic invoice can be verified by checking a set of points, including:

• It is issued by an electronic system.
• The invoice type matches the transaction.
• Accuracy of supplier data.
• Accuracy of the Tax Identification Number (TIN).
• Presence of buyer data when required.
• Correctness of numbers and dates.
• Clarity of goods and services.
• Correct calculation of tax.
• Presence of a QR code when its requirements apply.
• Inability to alter the invoice in an unregulated manner.
• Execution of Fatoora platform procedures when the establishment enters Phase Two.

ZATCA also provides a service to verify electronic invoices by scanning the QR code.

Why do you need an accounting program that supports both?

Because the invoicing cycle does not stop at issuing or printing the document.

The system should be capable of managing:

• Tax Invoices.
• Simplified Tax Invoices.
• Credit Notes.
• Debit Notes.
• Value Added Tax.
• Customer Accounts.
• Inventory.
• Points of Sale (POS).
• Branches.
• Journal Entries.
• Reports.

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It must also keep pace with the electronic invoicing requirements applicable to the establishment.

ZATCA clarifies that the taxpayer has the freedom to obtain a billing system from any provider, provided that the system used adheres to electronic invoicing requirements; therefore, merely having a service provider on a certain list is not the sole factor for judging compliance.

Thus, before adopting the software, you can review the Guide to Choosing an Accounting Software Compatible with E-invoicing.

How does DigitalPro help manage tax and electronic invoices?

DigitalPro helps link invoices with sales, accounts, inventory, POS, and reports, so that invoicing becomes part of the system cycle instead of being handled as a separate procedure.

Digital Business offers DigitalPro as a solution combining accounting, POS, and e-invoicing, with readiness to comply with Phase Two according to the information published on the website.

This integration can help in:

• Generating the invoice directly from the sales transaction.
• Calculating VAT.
• Updating the customer's account.
• Recording payments.
• Processing returns.
• Updating inventory balances.
• Preparing sales reports.
• Forming the accounting impact of the operation.
• Linking invoicing with POS.
• Managing branches.

The Accounts and POS System enables establishments that combine sales, inventory, and accounting to manage these operations within a connected cycle.

For establishments needing to access their accounts from multiple locations, they can benefit from the packages and pricing suitable for the required solution.

During a demo, it is better not to just watch a successful invoice being issued, but to test the following scenarios:

1. Issuing a tax invoice to a company.
2. Issuing a simplified tax invoice to an individual.
3. Executing a partial return.
4. Issuing a credit note.
5. Applying a discount on the invoice.
6. Issuing a credit/postpaid invoice.
7. Using more than one payment method.
8. Monitoring the invoice's effect on inventory.
9. Reviewing the journal entry resulting from the invoice.
10. Reviewing the tax report.

Learn about Account Management and POS Solutions, then book your consultation to try issuing both tax and electronic invoices on transactions close to your business nature before committing to the system.

Frequently Asked Questions on the Difference Between Tax and Electronic Invoices

What is the difference between a tax invoice and an electronic invoice in short?

A tax invoice determines the document type and tax-related data, while an electronic invoice indicates how the document is created, saved, and processed electronically.

Therefore, an invoice can be both tax-related and electronic at the same time.

Is every electronic invoice considered a tax invoice?

ZATCA's e-invoicing system handles two types of tax invoices: the Tax Invoice and the Simplified Tax Invoice. The document type is determined by the transaction's nature.

Is every tax invoice electronic?

For taxpayers subject to the e-invoicing regulations in Saudi Arabia, the issuance and saving phase mandates issuing invoices electronically via a compliant billing system.

Is a tax invoice the same as a simplified invoice?

No, a tax invoice is mostly used in B2B transactions, whereas a simplified tax invoice is typically used for B2C consumer sales.

Is a PDF invoice considered an electronic invoice?

Simply having the file in PDF format is not enough. The invoice must be created and saved by a compliant electronic solution. A scanned paper invoice does not become an electronic invoice.

Must an electronic invoice contain tax?

That depends on the nature of the supply and the tax status. An electronic invoice dictates the issuance method, while tax rules dictate the supply treatment and the applicable tax value.

When do I use a tax invoice?

It is mostly used for supplies from one establishment to another, containing the required tax invoice elements and data.

When do I use a simplified tax invoice?

It is typically used for selling from a business to an individual consumer, as seen in restaurants, cafes, and retail stores.

What is the relationship between an electronic invoice and the Fatoora platform?

During Phase Two, targeted establishments must integrate their e-invoicing systems with ZATCA’s Fatoora platform and issue documents in the required format.

Can Excel be used to issue an electronic invoice?

Relying on spreadsheet software as the e-invoicing system is insufficient for entities subject to the regulations; a compliant electronic solution must be used.

What is the proper software for issuing an electronic tax invoice?

The appropriate system is one that supports VAT, standard and simplified tax invoices, credit and debit notes, e-invoicing requirements, integration, and the ability to link invoices with accounts, inventory, and reports.

Conclusion

The difference between a tax invoice and an electronic invoice comes down to the fact that a tax invoice determines the document's nature and tax content, whereas an electronic invoice determines the method by which the document is created, stored, and processed digitally.

Therefore, the more accurate question is not: "Which one do I use?" but rather: "What type of tax invoice does the transaction require, and what is the correct method to issue it electronically?"

An establishment selling to a company might need an electronic tax invoice, while a retail store or restaurant mostly needs a simplified electronic tax invoice. In both cases, invoicing should be connected to tax, accounts, inventory, and POS whenever the business nature requires it.

An integrated accounting system helps reduce repetitive data entry and minimizes discrepancies between invoice data and accounts. Therefore, you can sign up and get a free trial in DigitalPro and test issuing both types, linking them with inventory, accounts, and reports before making a final operational decision.