The Special Regime for Used Goods (REBU) is a tax scheme widely used by dealerships for second-hand vehicles in Spain. It allows tax to be paid only on the profit margin instead of the total sale price, which can improve the business's competitiveness. However, it also involves a series of conditions, requirements and formalities which, if applied incorrectly, can lead to tax errors, penalties or disputes with customers.
In this article, we show you the most common mistakes when applying REBU in dealerships and how to avoid them in practice, with the support of specialist tools such as Dealcar.
How REBU works
REBU is designed for the sale and purchase of used goods, such as second-hand cars. For a dealership to apply it correctly, several requirements must be met:
The car must have been purchased from a private individual or an entity without the right to deduct VAT.
VAT is not calculated on the total sale price, but on the profit margin obtained.
The invoice issued must not itemise VAT and must include a specific mention indicating that it is a transaction covered by REBU.
It is compulsory to keep a specific record of this type of transaction, with the vehicle details, prices and parties involved.
Common mistakes when applying REBU
Applying REBU to transactions that do not meet the requirements
One of the most common mistakes is using REBU for cars that should not be covered by this regime. For example, if the vehicle is purchased from a company that issues an invoice with itemised VAT, REBU cannot be applied on resale. It is also not possible to use it for intra-Community purchases or imports with deductible VAT. These errors can be considered tax fraud by the Tax Agency.
Calculating the margin on which VAT should be applied incorrectly
Another frequent mistake is not calculating the profit margin correctly. In REBU, VAT must be applied to the difference between the sale price and the purchase price. If related expenses are omitted (such as repairs, transport or preparation), the margin may be calculated incorrectly, directly affecting the VAT return.
Incorrect invoicing
The invoice for REBU transactions must not show itemised VAT. Including it is a serious error that invalidates the transaction for tax purposes. In addition, it must include a phrase such as: "Transaction covered by the Special Regime for Used Goods, VAT included in the price, no right to deduction". Omitting this mention or using outdated formats can also be grounds for inspection or a claim.
Not keeping the purchase documentation
When applying REBU, the dealership is obliged to justify the vehicle's origin. If the invoice or the purchase receipt signed by the private seller is not kept, proof that this regime can be applied is lost. Likewise, if a separate record of REBU transactions (the so-called register book) is not maintained, the regulations would be breached.
Mixing REBU and the general regime without internal control
Many dealerships work with both regimes: REBU and the general regime. Not clearly distinguishing between these transactions can lead to accounting errors, duplicate VAT returns, or incorrect cross-invoicing. This lack of classification also makes it harder to analyse profitability and tax treatment.
Applying REBU in sales to businesses that want to deduct VAT
Lastly, another frequent mistake is selling a car under REBU to a company or sole trader who expects to deduct the VAT. Under this regime, VAT is included but not deductible, which can lead to complaints, returns or contractual disputes.
Here we leave you our REBU Guide for Used Car Sales so you can consult it.
Best practices to avoid mistakes with REBU
Check the vehicle's origin
Before applying REBU, make sure that the vehicle was bought from a private individual or an entity without the right to deduct VAT. Always keeping the purchase invoice or signed receipt is essential to justify the regime to the tax authorities.
Calculate the profit margin correctly
Keep a clear record of the purchase price and the sale price. Add all costs associated with the transaction to calculate the margin on which you will be taxed correctly.
Issue clear invoices that comply with the law
Use templates adapted to REBU that do not itemise VAT and include the relevant wording. Inform the customer that they will not be able to deduct that tax, especially if they are a company or self-employed trader.
Keep separate, up-to-date records
Organise REBU transactions in a separate register book, with all the information about the transaction. This will protect you in the event of any audit or tax inspection.
Classify your transactions correctly
Avoid mixing REBU transactions and the general regime. Establish internal processes to identify and classify each sale from the outset, according to its tax nature.
How Dealcar helps you apply REBU correctly
Dealcar offers key features for dealerships that want to work safely and efficiently:
Automatic classification of transactions as REBU or the general regime.
Generation of customised invoices in line with the applicable tax regime.
Linking of purchase documents and supporting evidence to each vehicle.
Recording of purchase and sale prices to calculate the actual margin.
Full history of each transaction, available for audits or tax reviews.
Thanks to Dealcar, dealerships can automate processes, reduce human error and ensure legal compliance without complications.
Conclusion
REBU is a very useful tax tool for used car dealerships, but it also requires knowledge and rigour. A single mistake in its application can lead to legal or tax problems. That is why it is key to understand the regime properly, train the team, organise the documentation correctly and, if possible, rely on a system like Dealcar to ensure everything is done safely and professionally.
FAQs
When can I apply REBU? When you buy a used car from a private individual or a company without the right to deduct VAT.
Should I itemise VAT on the REBU invoice? No. Under REBU, VAT is applied to the margin and is not itemised on the invoice.
Can I apply REBU if I bought the car from a company? Only if that company also applied REBU and did not itemise VAT on the invoice.
What happens if I invoice a REBU transaction incorrectly? You may receive penalties and have to amend the invoice. It could also lead to a dispute with the customer.
Does Dealcar help with REBU control? Yes. It allows you to classify transactions, issue correct invoices and keep a full document record of each sale.
The Special Regime for Used Goods (REBU) is a tax scheme widely used by dealerships for second-hand vehicles in Spain. It allows tax to be paid only on the profit margin instead of the total sale price, which can improve the business's competitiveness. However, it also involves a series of conditions, requirements and formalities which, if applied incorrectly, can lead to tax errors, penalties or disputes with customers.
In this article, we show you the most common mistakes when applying REBU in dealerships and how to avoid them in practice, with the support of specialist tools such as Dealcar.
How REBU works
REBU is designed for the sale and purchase of used goods, such as second-hand cars. For a dealership to apply it correctly, several requirements must be met:
The car must have been purchased from a private individual or an entity without the right to deduct VAT.
VAT is not calculated on the total sale price, but on the profit margin obtained.
The invoice issued must not itemise VAT and must include a specific mention indicating that it is a transaction covered by REBU.
It is compulsory to keep a specific record of this type of transaction, with the vehicle details, prices and parties involved.
Common mistakes when applying REBU
Applying REBU to transactions that do not meet the requirements
One of the most common mistakes is using REBU for cars that should not be covered by this regime. For example, if the vehicle is purchased from a company that issues an invoice with itemised VAT, REBU cannot be applied on resale. It is also not possible to use it for intra-Community purchases or imports with deductible VAT. These errors can be considered tax fraud by the Tax Agency.
Calculating the margin on which VAT should be applied incorrectly
Another frequent mistake is not calculating the profit margin correctly. In REBU, VAT must be applied to the difference between the sale price and the purchase price. If related expenses are omitted (such as repairs, transport or preparation), the margin may be calculated incorrectly, directly affecting the VAT return.
Incorrect invoicing
The invoice for REBU transactions must not show itemised VAT. Including it is a serious error that invalidates the transaction for tax purposes. In addition, it must include a phrase such as: "Transaction covered by the Special Regime for Used Goods, VAT included in the price, no right to deduction". Omitting this mention or using outdated formats can also be grounds for inspection or a claim.
Not keeping the purchase documentation
When applying REBU, the dealership is obliged to justify the vehicle's origin. If the invoice or the purchase receipt signed by the private seller is not kept, proof that this regime can be applied is lost. Likewise, if a separate record of REBU transactions (the so-called register book) is not maintained, the regulations would be breached.
Mixing REBU and the general regime without internal control
Many dealerships work with both regimes: REBU and the general regime. Not clearly distinguishing between these transactions can lead to accounting errors, duplicate VAT returns, or incorrect cross-invoicing. This lack of classification also makes it harder to analyse profitability and tax treatment.
Applying REBU in sales to businesses that want to deduct VAT
Lastly, another frequent mistake is selling a car under REBU to a company or sole trader who expects to deduct the VAT. Under this regime, VAT is included but not deductible, which can lead to complaints, returns or contractual disputes.
Here we leave you our REBU Guide for Used Car Sales so you can consult it.
Best practices to avoid mistakes with REBU
Check the vehicle's origin
Before applying REBU, make sure that the vehicle was bought from a private individual or an entity without the right to deduct VAT. Always keeping the purchase invoice or signed receipt is essential to justify the regime to the tax authorities.
Calculate the profit margin correctly
Keep a clear record of the purchase price and the sale price. Add all costs associated with the transaction to calculate the margin on which you will be taxed correctly.
Issue clear invoices that comply with the law
Use templates adapted to REBU that do not itemise VAT and include the relevant wording. Inform the customer that they will not be able to deduct that tax, especially if they are a company or self-employed trader.
Keep separate, up-to-date records
Organise REBU transactions in a separate register book, with all the information about the transaction. This will protect you in the event of any audit or tax inspection.
Classify your transactions correctly
Avoid mixing REBU transactions and the general regime. Establish internal processes to identify and classify each sale from the outset, according to its tax nature.
How Dealcar helps you apply REBU correctly
Dealcar offers key features for dealerships that want to work safely and efficiently:
Automatic classification of transactions as REBU or the general regime.
Generation of customised invoices in line with the applicable tax regime.
Linking of purchase documents and supporting evidence to each vehicle.
Recording of purchase and sale prices to calculate the actual margin.
Full history of each transaction, available for audits or tax reviews.
Thanks to Dealcar, dealerships can automate processes, reduce human error and ensure legal compliance without complications.
Conclusion
REBU is a very useful tax tool for used car dealerships, but it also requires knowledge and rigour. A single mistake in its application can lead to legal or tax problems. That is why it is key to understand the regime properly, train the team, organise the documentation correctly and, if possible, rely on a system like Dealcar to ensure everything is done safely and professionally.
FAQs
When can I apply REBU? When you buy a used car from a private individual or a company without the right to deduct VAT.
Should I itemise VAT on the REBU invoice? No. Under REBU, VAT is applied to the margin and is not itemised on the invoice.
Can I apply REBU if I bought the car from a company? Only if that company also applied REBU and did not itemise VAT on the invoice.
What happens if I invoice a REBU transaction incorrectly? You may receive penalties and have to amend the invoice. It could also lead to a dispute with the customer.
Does Dealcar help with REBU control? Yes. It allows you to classify transactions, issue correct invoices and keep a full document record of each sale.




