Modelo 303 calculator

Add your sales (output VAT) and deductible purchases (input VAT) by rate and we compute the main Modelo 303 boxes: output VAT (27), deductible (45) and result (71). Covers the common general-regime case; not a substitute for your accountant.

Frequently asked questions

How often is Modelo 303 filed?

Quarterly: April, July, October and January (for the previous quarter). Some taxpayers file monthly.