Supplies
Regulations: Art. 30.2.5b) Law Income Tax
This concept must include the amount of expenses corresponding to electricity and any other supplies (water, gas, telephone, internet, etc.) that cannot be stored.
Without prejudice to the above, the following special rule of IRPF , which is discussed below, must be taken into account for the purposes of determining the deductible amounts for this concept.
Personal income tax on utility costs for the taxpayer's habitual residence that is partially affected by the development of economic activity
Regulations: Art. 30.2.5.b) Law Income Tax
From 1 January 2018, when the taxpayer partially uses his or her habitual residence for the development of his or her economic activity, the costs of supplies for said residence, such as water, gas, electricity, telephone and Internet, will be deductible in the percentage resulting from applying 30% to the proportion between the square metres of the residence used for the activity and its total surface area, unless a higher or lower percentage is proven.
Prior to the amendment made by Article 11 of Law 6/2017, of October 24, on Urgent Reforms of Self-Employment (BOE of the 25th), only expenses arising from the ownership of the home, such as amortizations, IBI, community of owners, etc., were considered fully deductible in these cases, in proportion to the part of the home affected to the development of the activity and its percentage of ownership in the property, unless the taxpayer was a tenant of the home, in which case he could deduct the expense corresponding to the income paid for the rental of the home in proportion to the part exclusively affected by the economic activity in relation to the entirety of the same. On the contrary, it was required that the expenses derived from supplies (water, electricity, heating, telephone, Internet connection, etc.) be used exclusively for the exercise of the activity, and the same apportionment rule that was applied to the expenses derived from the ownership or rental of the home could not be used in relation to these.
Example:
Mr. JCP uses a 40 m² room in his habitual residence to practice law.
Determine the deductible amount of the utility costs corresponding to the part of the home used for professional activity, taking into account that the taxpayer's habitual residence has 100 m² and the annual utility costs amount to 5,000 euros.
Solution:
Proportion of the m² of the usual residence used for the activity in relation to its total surface area: 40 m² / 100 m² = 40%
Deduction percentage = 30% x 40% = 12%
Deductible expenses: 12% on 5,000 euros = 600 euros