Calculation of Material Costs in Renovation of Homes: Determining Applicable Rates for Works

Calculation of the cost of materials in renovation and repair works of houses
Determination of the applicable rate based on the percentage of the cost of materials
Clarification on whether the costs of specified materials should be added or if invoices from contractors where the cost of materials exceeds 40% of the taxable base count as material contribution
The cost of materials is the acquisition price from third parties
If materials are obtained by the main contractor as part of their production process, the cost of production applies
The price of acquisition for materials included in subcontracted works should be considered, regardless of the percentage they represent in the taxable base.

Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.