What legal documentation is crucial for accurate Costa del Sol property tax calculation?

When selling property on the Costa del Sol, several legal documents are crucial for accurate tax calculation. For Capital Gains Tax (CGT or IRPF), you will need the original purchase deed ( escritura de compraventa) which details the acquisition price and any associated costs, along with invoices for documented improvements or renovations that can legitimately reduce the taxable gain. Receipts for all selling expenses, such as real estate agent fees, legal fees, and notary costs, are also vital to deduct from the sale price. For Plusvalía Municipal (tax on the increase in urban land value), the purchase deed and the current sale deed are essential as they contain the dates of acquisition and sale, and the cadastral value of the land, which are the primary determinants of this tax. The Last Will and Testament, if the property was inherited, or donation deeds if it was received as a gift, will be necessary to establish the acquisition value for CGT purposes in those scenarios. Furthermore, non-residents must provide their NIE (Número de Identificación de Extranjero) and, if applicable, a certificate of fiscal residency in their home country to claim double taxation relief. Ensuring all these documents are meticulously organised and readily available from the outset will significantly streamline the legal and fiscal process, helping to avoid delays and unnecessary complications when calculating and paying your property taxes upon sale.