Inseparable elements of a construction project shall be included in the ICIO taxable base

Determining the taxable base for the Tax on Constructions, Installations, Works, and Repairs (ICIO) frequently generates technical doubts, especially when distinguishing between civil works and the machinery or equipment installed within them. A recent binding ruling from the Dirección General de Tributos (DGT) has delimited the scope of this tax regarding elements incorporated into a construction.

What the DGT has ruled

The tax authority's criteria establish a clear distinction based on the nature and integration of the elements within the urban planning license project:

• Included elements: Components that are inseparable from the work, appear in the license project, and lack their own identity relative to the construction must be integrated into the taxable base. For this to occur, they must form part of the unit of work and be necessary to provide essential services for habitability or use.
• Excluded elements: The costs of equipment and machinery manufactured by third parties off-site shall not be counted, with the exception of their installation cost. Likewise, machines that are only relevant for obtaining an activity or operating license, but have no relevance to the urban planning license, are excluded.

What this means for you

If your company carries out renovations or installations that require a construction license, the correct classification of costs is decisive for the tax calculation. Not all assets installed in a building form part of the taxable base. The key lies in the technical documentation: if an element is described as an integral part of the structure or essential services in the urban planning license project, its value will be subject to taxation.

Conversely, machinery that is installed independently and whose relevance is merely operational or related to activity (rather than construction) remains outside the ICIO calculation, which represents a significant difference in the project's tax burden.

What should be done

It is necessary to conduct an exhaustive review of urban planning license projects before settling the tax. It must be ensured that the distinction between civil works and activity machinery is clearly reflected in the technical report and in the cost accounting. The correct segregation of elements that lack their own identity from those that are merely activity equipment will help avoid excessive settlements or potential inspections due to an incorrect taxable base.