A company car is one of the most commonly used assets in business activity. In practice, however, the way a vehicle is used rarely remains the same throughout its entire lifecycle. A change in purpose – for example, from mixed use to exclusively business use, or the other way around – has important VAT consequences that should not be overlooked.
Below is a practical guide explaining when an input VAT adjustment is required, how long the adjustment period lasts, and how to calculate the correction correctly.
What is an input VAT adjustment?
An input VAT adjustment is a mechanism arising from VAT regulations which ensures that the amount of VAT deducted at the time of purchase corresponds to the actual use of the vehicle in taxable business activity.
In simple terms: if the method of using the car changes, the VAT previously deducted must be proportionally adjusted.
When is an adjustment required?
The obligation to adjust input VAT arises particularly in the following situations:
- change from mixed use (50% VAT deduction) to exclusively business use (100% deduction),
- change from exclusively business use (100%) to mixed use (50%),
- sale of the vehicle during the adjustment period,
- change in the nature of business activity, for example from taxable to VAT-exempt activity.
Each of these situations affects the scope of the right to deduct VAT and may require an increase or decrease of the amount previously deducted.
Adjustment period – how long does it apply?
For passenger cars with an initial value exceeding PLN 15,000 net, the VAT adjustment period is: 5 years (60 months)
The period is counted from the year in which the vehicle was put into use. During this time, any change in the method of using the car may trigger the obligation to recalculate the deductible VAT proportion.
Practical example
A taxpayer purchased a car in March 2022 for PLN 80,000 net plus PLN 18,400 VAT. Because the vehicle was used for mixed purposes, only 50% of VAT was deducted, i.e. PLN 9,200. The car was sold in April 2025 and the sale was subject to VAT.
Adjustment period: 5 years (60 months)
Period of use before sale: 37 months
Remaining period: 23 months
Calculation:
Annual adjustment: 9,200 ÷ 5 = 1,840 PLN
Monthly adjustment: 1,840 ÷ 12 ≈ 153.33 PLN
Adjustment for remaining 23 months: 153.33 × 23 = 3,526.59 PLN
In this case, the adjustment is positive, meaning the taxpayer may recover additional VAT because the taxable sale gives the right to full deduction for the remaining adjustment period.
If the situation is reversed (for example, the car was initially used exclusively for business purposes and later also privately), the entrepreneur must return part of the VAT for the remaining adjustment period.
Sale of a car during the adjustment period
Selling a vehicle within the 5-year adjustment period requires a one-time correction covering the remaining months of the period.
Importantly, if the sale is subject to VAT, the taxpayer may often increase the amount of deductible VAT that was previously limited due to mixed use.
Most common mistakes made by entrepreneurs
Based on practical experience, the most frequent errors include:
- failure to make an adjustment after changing the way the vehicle is used,
- incorrect calculation of the adjustment period,
- omission of adjustment when selling the car,
- lack of required documentation when applying 100% VAT deduction (e.g. mileage records or internal regulations regarding vehicle use).
Summary
A change in the purpose of a company car is not only an operational decision but also a tax event. In many cases, it requires adjusting input VAT, either increasing or decreasing the deductible amount.
Analysing the consequences in advance helps avoid errors and allows entrepreneurs to fully benefit from available VAT deductions.
Need support?
If you are unsure:
- whether an adjustment is required,
- how to calculate the correction,
- whether you can recover VAT,
- or how to properly account for the sale of a company car,
contact us – we will help you safely and efficiently navigate the entire process.