Iceland VAT Invoice Requirements: Mandatory Fields and Rules

Iceland's VAT invoice requirements are defined by the country's VAT Act (virðisaukaskattalög), which mandates a specific set of fields on every invoice issued for taxable goods or services. The Icelandic tax authority, Skatturinn, enforces these requirements, and non-compliant invoices can jeopardize VAT deductions for the buyer and trigger penalties for the seller.

One point of confusion in English-language resources: Iceland is a member of the European Economic Area (EEA), not the European Union. Its VAT system is governed entirely by Icelandic national law, not the EU VAT Directive. This means EU invoicing rules do not automatically apply, and businesses operating in Iceland must follow the specific requirements set out in the Icelandic VAT Act.

These requirements apply across Iceland's entire VAT-registered economy. In 2024, the tourism industry alone reported 975 billion ISK in VAT turnover (Statistics Iceland VAT turnover data), and every sector uses the same invoicing framework.

The following fields must appear on every VAT invoice issued in Iceland:

• Date of issue of the invoice
• Seller's full name and buyer's full name
• Kennitala (Icelandic national ID number) for both the seller and the buyer
• Seller's VAT registration number (VSK number)
• Description of the goods or services supplied
• Quantity of goods or services
• Unit price
• Total price
• VAT disclosure: a clear statement showing whether VAT is included in the total, either as a separate line or expressed as a percentage of the gross total (19.35% for the standard rate, 9.91% for the reduced rate)
• Pre-numbered invoice identifier in a consecutive sequence

Kennitala and VAT Registration Numbers

Every VAT invoice issued in Iceland must identify both parties to the transaction using Iceland's national identification number, the kennitala. This is a 10-digit number assigned to every individual and legal entity registered in the country. It serves as Iceland's combined equivalent of a tax identification number, company registration number, and national ID, functioning as a universal identifier across tax, business, and government systems.

The legal requirement is straightforward: the seller's kennitala and the buyer's kennitala must both appear on the invoice. This dual requirement catches many businesses off guard, particularly those accustomed to jurisdictions where only the seller's details are mandatory. In Iceland, an invoice missing either party's kennitala is incomplete.

Separate from the kennitala, businesses registered for VAT must display their VSK number (from virðisaukaskattur, the Icelandic term for value-added tax). Skatturinn, the Icelandic tax authority, issues this number upon VAT registration. The VSK number confirms that the seller is an active VAT-registered entity and is authorized to charge VAT on taxable supplies. It is not interchangeable with the kennitala; both must appear on the invoice.

For foreign companies selling taxable goods or services in Iceland, local registration is not optional. A foreign tax ID or VAT number from another EEA member state does not substitute for an Icelandic VSK number. If your business has a taxable presence in Iceland, you must register directly with Skatturinn, obtain a VSK number, and include it on all invoices alongside the kennitala assigned during registration. Foreign entities receive a kennitala as part of their Skatturinn registration. Businesses that also handle imports through Iceland will encounter additional identification requirements on customs documentation, a topic covered in detail under Iceland's customs and import invoice requirements.

VAT Display Rules and the Gross-Total Calculation

Every Icelandic VAT invoice must state unambiguously whether VSK (virðisaukaskattur) is included in the total price. This is not a formatting preference. The Icelandic VAT Act requires the face of the invoice to leave no room for interpretation on this point.

There are two acceptable ways to present VAT on an invoice:

1. VAT as a separate line item. The invoice shows a net amount, a VAT amount, and a total. This is the format most businesses outside Iceland will recognize.
2. VAT expressed as a percentage of the gross total. When the price already includes VAT, the invoice states the VAT portion as a percentage of the VAT-inclusive amount. This is where Iceland's VSK invoice rules diverge from what you will find in most other jurisdictions.

The 19.35% and 9.91% Gross-Total Method

Iceland applies two VAT rates: a standard rate of 24% on most taxable goods and services, and a reduced rate of 11% on specific categories including food products, accommodation, and certain other goods and services.

When VAT is already embedded in the total price, Icelandic invoices express the tax as a share of that gross total rather than the net amount. The arithmetic is straightforward:

• Standard rate: 24 / 124 = 19.35% of the gross total
• Reduced rate: 11 / 111 = 9.91% of the gross total

So on a gross-total invoice of ISK 124,000 for a standard-rated service, the VAT component is ISK 24,000 (19.35% of the total). For a reduced-rate item totaling ISK 111,000, the VAT component is ISK 11,000 (9.91% of the total). These percentages are specific to Iceland and appear on no standard VAT reference published in English. If you are setting up invoice templates for Icelandic transactions, these are the figures your template needs.

When an invoice includes both standard-rated and reduced-rated items, each rate must be broken out separately so the VAT calculation for each category is visible.

Invoices from VAT-Exempt Sellers

A seller who is not registered for VAT, or who is exempt from the tax, is legally prohibited from indicating that VAT is included in any amount on the invoice. This goes beyond formatting guidance. An exempt seller's invoice must not show a VAT line, a VAT percentage, or any language implying that VAT has been charged. Meeting Iceland's VAT-exempt invoice requirements on this point is mandatory, not optional.

Buyers who receive an invoice from a non-VAT-registered seller cannot claim a VAT input deduction on that purchase. No valid VAT charge means no deduction, regardless of the amount paid.

Invoice Numbering and Issuance Requirements

Iceland's VAT Act requires every invoice to carry a pre-numbered, consecutive sequence number. This means the number is assigned to the invoice form itself before any transaction details are filled in, whether you are using printed invoice books or digital templates. The purpose is accountability: every form in the sequence must be accounted for, making it impossible to create or destroy an invoice without leaving a gap in the record.

Gaps in the numbering sequence are a red flag for the Directorate of Internal Revenue. If an audit reveals missing numbers, the burden falls on you to explain the discrepancy. Voided invoices should be retained (marked as cancelled) rather than deleted, so the sequence remains intact.

The timing of invoice issuance is equally prescriptive. You must issue a VAT invoice for every sale or delivery of taxable goods or services, and the invoice must be issued at the earlier of two events: the point of delivery or the receipt of payment. Waiting until month-end to batch-issue invoices for goods already delivered or payments already collected does not satisfy this requirement.

For businesses using accounting software or electronic invoicing platforms, the Iceland invoice numbering rules still apply in full. Your system must assign consecutive numbers automatically, and the numbering sequence should not allow manual overrides, resets, or duplicates. If your software lets users manually edit or restart invoice numbers, it does not meet the standard.

Iceland's public sector now requires electronic invoicing through the Peppol framework, which imposes additional format and transmission standards on top of the general VAT invoice rules discussed here. If you supply goods or services to Icelandic government entities, review Iceland's public-sector e-invoicing rules and Peppol standards for the specific requirements that apply to those transactions.

Record Retention and Non-Compliance

Icelandic businesses must retain all VAT invoices and supporting records for a minimum of seven years from the end of the relevant accounting year. This applies equally to invoices you issue and invoices you receive. The requirement extends beyond the invoices themselves to include purchase records, accounting entries, and any correspondence related to the underlying transactions.

Records may be stored electronically, provided they remain accessible and legible for the full retention period. There is no exemption for digital-only businesses or foreign companies registered for VAT in Iceland. Skatturinn (the Directorate of Internal Revenue) can request your complete invoice records at any point within that seven-year window as part of a VAT audit, so partial or degraded archives are a practical risk, not just a theoretical one.

The consequences of non-compliant invoices reach both sides of the transaction:

• For the buyer: A VAT invoice missing mandatory fields, displaying VAT incorrectly, or lacking a valid sequential number can result in Skatturinn denying the input VAT deduction claimed on that purchase. The buyer bears the cost of the seller's formatting failure.
• For the seller: Issuing deficient invoices may trigger penalties including fines and a reassessment of VAT liability. Broken numbering sequences or missing kennitala details are among the deficiencies most likely to draw scrutiny during an audit.

Skatturinn holds broad authority to conduct VAT audits and to compel production of invoice records under the Icelandic VAT Act. For foreign companies operating in Iceland, the same retention obligations and penalty exposure apply. Establish a compliant archival process before your first Icelandic invoice, not after an audit request.