How to prepare your Modelo 303 (quarterly IVA)

The Modelo 303 is the quarterly IVA (VAT) declaration that every autonomo in Spain must file. It calculates the difference between IVA you charged on invoices (IVA repercutido) and IVA you paid on business expenses (IVA soportado).

Filing deadlines: Q1 by April 20, Q2 by July 20, Q3 by October 20, Q4 by January 30 of the following year.

The calculation is straightforward: Total IVA collected on your invoices minus total deductible IVA on your expenses equals the amount you owe (or AEAT owes you).

With k-factu, your Modelo 303 is pre-filled automatically from your invoices and expenses. Just review the numbers with your asesor fiscal and file through the Sede Electronica.