Booking Margin Taxation – DATEV SKR03 & SKR04 Guide for Car Dealers

Whether vehicle sale, workshop billing, or EU transaction – the automotive invoice is far more than a standard document. High invoice amounts, different taxation types, and industry-specific mandatory information make invoicing in the car trade a real challenge. This comprehensive guide explains all the specifics, shows the mandatory information for each invoice type, and demonstrates how modern software automates the entire process.

Why automotive invoices are special

Compared to invoices in other industries, invoices in the automotive trade have several features that make them significantly more complex. Understanding the background helps avoid expensive mistakes with the automotive invoice and saves time during tax office reviews.

High invoice amounts and their consequences

Vehicle sales typically range between 5,000 EUR and 150,000 EUR – or even higher. These high amounts have direct implications for invoicing requirements:

• Increased scrutiny: The tax office reviews high-value invoices particularly carefully. Incorrect information leads more quickly to inquiries or tax audits.
• Input tax deduction: For the buyer, a substantial input tax claim depends on a correct invoice. If a mandatory item is missing, the tax office can deny the input tax deduction.
• VAT special audits: Special audits are frequent in vehicle trading. Complete, error-free invoices are the best protection.
• Liability risk: If taxation is incorrect on the invoice, the issuer is liable for the unduly stated tax per Section 14c UStG.

Mixed taxation in one business

Unlike most industries, car dealers regularly work with different forms of taxation simultaneously. One and the same business may issue an invoice with margin taxation for a used car, a standard VAT invoice for a new car, and a tax-exempt intra-Community supply on the same day. This mix requires the utmost care with every single automotive invoice.

Many different line items and service types

A typical workshop invoice can contain dozens of individual items: labor charges, spare parts, lubricants, subcontracted services, and disposal costs – each with different tax rates or calculation bases. This complexity demands structured processes and ideally a specialized invoicing software.

Invoice types in the automotive trade at a glance

Depending on the business transaction, different invoice types are used in the car trade. Each type has its own requirements for content, form, and tax treatment.

Margin taxation vs. standard taxation on the automotive invoice

The question of whether a vehicle is sold under margin or standard taxation is one of the central decisions for every automotive invoice. Both options have significant implications for invoice content and tax treatment.

When does margin taxation apply?

Margin taxation per Section 25a UStG is applicable whenever a car dealer purchases a used vehicle from a private individual, a small business, or another margin-taxed dealer – i.e., without input tax deduction. VAT is then calculated only on the trade margin (difference between purchase and selling price), not on the full selling price. Details on application can be found in our article on invoicing under margin taxation.

Differences on the invoice

Mandatory note for margin taxation

For margin-taxed vehicles, the invoice must contain one of the following notes:

• “Second-hand goods / special scheme” (Section 25a UStG)
• “Margin taxation per Section 25a UStG – VAT is not disclosed”
• Alternatively the English formulation for EU transactions: “Second-hand goods / Special scheme – Margin scheme”

A specialized software like the AutoPult margin taxation module automatically sets the correct note as soon as a vehicle is marked as margin-taxed.

Mandatory information on the automotive invoice

In addition to the general mandatory information per Section 14 (4) UStG (full name and address of service recipient and provider, tax number or VAT ID, invoice number, invoice date, service description, consideration, and tax amount), there are industry-specific details that should not be missing from any automotive invoice.

Vehicle-specific mandatory information

• Vehicle Identification Number (VIN): The 17-digit VIN is the central identification feature of every vehicle. It must appear on every vehicle sales invoice – not only for traceability but also for directed registration processes and assignment during tax audits.
• Date of first registration: Decisive for classifying the vehicle as new or used, especially for intra-Community supplies. A vehicle is considered “new” within the meaning of Section 1b UStG if the first registration was no more than six months ago or the vehicle has traveled no more than 6,000 km.
• Mileage: The odometer reading at handover is relevant not only for warranty purposes but also serves as documentation for margin taxation and as proof to the buyer.
• Vehicle data: Manufacturer, model, type, engine displacement, power output (kW/PS), color, and other vehicle-specific characteristics belong in the service description of a complete automotive invoice.

Tip: The more detailed the vehicle description on the invoice, the fewer inquiries from the tax office. Professional invoicing software for the automotive trade automatically transfers this data from the vehicle master record, eliminating manual entry.

General mandatory information per Section 14 UStG – checklist

• Full name and address of the service provider
• Full name and address of the service recipient
• Tax number or VAT ID of the issuer
• Sequential invoice number
• Issue date of the invoice
• Date of delivery or service
• Quantity and type of goods delivered / scope of services
• Consideration (net amount)
• Applicable tax rate and tax amount, or note on tax exemption
• Where applicable, note on the recipient’s retention obligation (for services to private individuals in connection with real estate)

EU transactions: reverse charge and tax-exempt intra-Community supply

Cross-border vehicle trading within the EU brings additional requirements for the automotive invoice. Errors in this area can lead not only to tax back payments but also to suspicion of VAT carousel fraud.

Tax-exempt intra-Community supply

When a German car dealer sells a vehicle to a business in another EU member state, the delivery can be VAT-exempt under certain conditions:

• The buyer is registered as a business in another EU member state and holds a valid VAT ID
• The vehicle is actually transported or dispatched to the other EU country (proof of dispatch required: CMR consignment note, arrival confirmation, or shipping document)
• The buyer declares the intra-Community acquisition in their country

The following information is mandatory on the invoice:

• VAT ID of the supplier (German) and of the recipient (foreign)
• Note: “Tax-exempt intra-Community supply per Section 4 No. 1b in conjunction with Section 6a UStG”
• No VAT shown (0%)
• The recapitulative statement (ZM) must be submitted to the Federal Central Tax Office on time

Reverse charge procedure

For certain cross-border services – such as repair work on vehicles of foreign businesses or brokerage services – the reverse charge procedure (transfer of tax liability) applies. The invoice then contains:

• No VAT disclosed
• The note: “Reverse charge – VAT liability of the service recipient”
• Both VAT IDs

Practical note: Before every EU delivery, verify the buyer’s VAT ID via the BZSt portal or the EU Commission’s VIES database. An invalid VAT ID results in the tax exemption being denied, and you must pay German VAT retroactively.

Workshop invoice: specifics and mandatory information

The workshop invoice is its own invoice type with specific requirements. Customers expect transparency, and case law increasingly sets high standards for the traceability of workshop invoices.

Structure of a correct workshop invoice

• Customer and vehicle data: Name, address, license plate, VIN, mileage at acceptance
• Order number and date: Reference to the workshop order
• Labor items: Each service listed individually with labor units (LU), billing rate per LU, and total amount
• Material costs: Each spare part with part number, description, quantity, and unit price
• Subcontracted services: Externally commissioned work (e.g., painting, wheel alignment) listed separately
• Disposal costs: Used oil, brake fluid, coolant – with proof where applicable
• Summary: Total labor, total materials, total subcontracted services, net amount, VAT, gross amount

Transparent disclosure of labor units and billing rates

Per Federal Court of Justice (BGH) case law, a workshop invoice must be comprehensible for the average customer. This means: the hourly rate or billing rate per labor unit must be discernible, and the calculated labor units for each item should be realistic and plausible compared to manufacturer specifications. For comprehensive insurance claims, insurers regularly require a detailed breakdown per manufacturer specifications (e.g., Audatex, DAT calculations).

Small-amount invoices in the automotive sector

For invoices up to 250 EUR gross, simplified requirements apply per Section 33 UStDV. In the automotive sector, this typically covers minor workshop services, accessory sales, or car wash receipts.

Simplified mandatory information for small-amount invoices

• Full name and address of the service provider
• Issue date
• Quantity and type of delivery or service
• Gross amount and applicable tax rate (or note on tax exemption)

Not required for small-amount invoices: recipient name and address, tax number/VAT ID, invoice number, and separate tax disclosure. Nevertheless, it is advisable to issue even small-amount invoices in full to avoid vulnerability during a potential tax audit.

Credit note for vehicle trade-ins

When a car dealer takes a vehicle in trade, the question of correct billing arises. If the dealer purchases the vehicle from a private individual, this constitutes an independent legal transaction. The tax treatment on the automotive invoice depends on who the vehicle is purchased from.

Credit note as a billing document

When a business purchases a vehicle from another business, billing can be handled via a credit note (self-billing per Section 14 (2) Sentence 2 UStG). The buyer – i.e., the car dealer – creates the invoice on behalf of the seller. Prerequisites:

• Prior agreement between the parties on the self-billing procedure
• Labeling as “credit note” on the document
• All mandatory information of a standard invoice must be included
• The credit note becomes void if the recipient objects to it

Note: The VAT credit note must not be confused with a colloquial “credit note” (correction document / reversal invoice). In self-billing, the service recipient creates the invoice; in a correction credit note, the invoice issuer corrects an already issued invoice. The document should clearly state “Credit note per Section 14 (2) Sentence 2 UStG” to avoid confusion.

Trade-in from private individuals

When the dealer purchases the vehicle from a private individual, they do not issue a document with VAT disclosure, as the private individual is not a business. Instead, a purchase agreement (purchase receipt) suffices as the booking basis. Since no input tax deduction is possible, the vehicle can subsequently be resold under margin taxation.

E-invoicing in the automotive trade

From January 1, 2025, all businesses in Germany must be able to receive structured electronic invoices (e-invoices) in XInvoice or ZUGFeRD format. Staggered transitional periods for sending apply until 2028. In the car trade as well, the e-invoice is becoming the standard for the automotive invoice.

What changes with the e-invoicing mandate?

• Format: Invoices must be in a structured electronic format (XML-based). A PDF invoice by email is no longer sufficient in the long term.
• Receiving obligation from 2025: Every business must be able to receive and process e-invoices.
• Sending obligation staggered: Companies with prior-year revenue above 800,000 EUR must send e-invoices from 2027; all others from 2028.
• Automotive-specific fields: In e-invoices, industry-specific information such as VIN, mileage, and first registration can be included as additional data fields.

ZUGFeRD or XInvoice?

For the automotive trade, ZUGFeRD is the more practical format: it combines a human-readable PDF with a machine-readable XML dataset. This way, customers can read the invoice as a PDF as usual, while accounting systems automatically process the data. XInvoice, by contrast, is purely XML-based and is mainly used in the public sector (B2G).

Future-proof: Anyone already using invoicing software that generates e-invoices in ZUGFeRD format is well prepared for upcoming obligations. AutoPult already generates all invoice types optionally as ZUGFeRD e-invoices – including industry-specific additional fields.

Avoiding common mistakes on the automotive invoice

From practical experience, auditors know the typical error sources that repeatedly lead to objections. Car dealers should definitely avoid these:

• Missing VIN entry: Without a Vehicle Identification Number, the service description is insufficient – the buyer’s input tax deduction is jeopardized.
• Incorrect taxation note: A margin-taxed vehicle with open VAT disclosure or vice versa – both variants have severe tax consequences.
• Missing or incorrect VAT ID for EU transactions: The tax exemption for the intra-Community supply is denied.
• No separation of labor and materials: Workshop invoices without separate breakdown violate transparency requirements.
• Gaps in invoice numbering: Missing numbers arouse auditors’ suspicion of undeclared revenue.
• Invoice date differs from delivery date: Without correct specification of the delivery/service date, a statutory mandatory item is missing.

How AutoPult automatically generates all invoice types

Manually creating automotive invoices is error-prone and time-consuming. AutoPult as a specialized industry solution for the car trade automates the entire invoicing process while considering all the specifics mentioned above.

Automatic detection of taxation type

When purchasing a vehicle, AutoPult records whether an input tax deduction was possible. On subsequent sale, the correct taxation type (standard or margin taxation) is automatically applied – including all mandatory notes on the invoice. An accidental open VAT disclosure under margin taxation is thus ruled out.

Automatic transfer of vehicle data

All vehicle-specific data – VIN, first registration, mileage, equipment – is transferred directly from the vehicle master record into the invoice. This not only saves time but also eliminates transcription errors that are inevitable with manual entry.

Workshop invoices at the click of a button

From the workshop module, AutoPult automatically generates the invoice: labor units, parts, subcontracted services, and disposal costs are taken directly from the workshop order. The breakdown into labor and material costs is automatic and meets the requirements of insurers and auditors.

Legally compliant EU transactions

For vehicle sales to other EU countries, AutoPult automatically verifies the buyer’s VAT ID, sets the correct tax exemption note, and generates the data for the recapitulative statement. This ensures every intra-Community supply is correctly documented from the start.

E-invoicing and interfaces

All invoice types can be generated as ZUGFeRD e-invoices and sent by email or portal. The DATEV interface ensures that invoices automatically flow into accounting – without double entry, without media breaks.

Conclusion: the automotive invoice as a reflection of professional processes

Invoicing in the automotive trade is more demanding than in most other industries. Margin taxation, EU transactions, workshop billing, and the upcoming e-invoicing mandate place high demands on car dealers and their systems. Those who rely on manual processes or generic standard software risk costly errors and unnecessary time expenditure.

With a specialized industry solution like AutoPult, the automotive invoice transforms from a risk factor into a quality hallmark: all mandatory information is set automatically, the correct taxation type is reliably detected, and all invoice types – from the vehicle sales invoice to the e-invoice – are available at the click of a button. This leaves more time for the core business: trading automobiles.