Interest on a loan for the activity
Interest on a loan used for the activity can be a cost. Repayment of principal is not an expense. A personal loan is not. The app does not split the receipt: you record the interest you can justify.
Interest yes, principal no
A bank instalment has two different parts. Interest on money used in the activity can be entered as a justified expense. The part that repays capital is a return of what was borrowed, not a cost of the activity.
- Interest on a loan for the activity.
- Principal is not an expense.
- A personal loan does not qualify.
You record the interest
Do not assume the app opens the receipt and splits interest from capital. You enter the interest the bank documents and that you can justify. The overview is in deductible expenses.
Common questions
Is the whole loan instalment an expense?
No. Interest on a loan for the activity can be. Repayment of principal is not an expense.
Does the app split interest and capital by itself?
No. You record the interest you can justify. A personal loan is not an activity expense.
Official sources
Informational text reviewed on 26 September 2026. It is not tax advice and does not replace the Spanish Tax Agency or your accountant. Deadlines, rates, and forms can change.