Modelo 303 (VAT)
Modelo 303 is the quarterly VAT self-assessment. It nets the VAT you charged your customers (output VAT, IVA repercutido) against the VAT you paid suppliers that is deductible (input VAT, IVA soportado). The difference is what you pay the tax office or, if negative, what you carry forward or get refunded.
Aikount computes the 303 from your real accounting, not a separate spreadsheet: the same journal entries you see in the ledger are the ones that feed the model.
How it's calculated
Result = output VAT − deductible input VAT.
- Output VAT: comes from your sales invoices. In accounting it's account
477. See VAT and IRPF. - Input VAT: comes from your deductible purchase invoices. In accounting it's account
472. See Input VAT and reverse charge.
Because the model is built from the ledger, if the result isn't what you expect it's almost always a missing invoice or an unimported expense, not a calculation error.
What Aikount includes
- Domestic sales and purchases at their various VAT rates.
- Reverse charge on intra-EU purchases: the VAT is self-charged and deducted within the same model, automatically.
- Credit notes and refunds already net out their bases and amounts.
Exempt intra-EU sales (IVAINTRA) carry no VAT on the 303; they're declared separately on Modelo 349. VAT on EU B2C sales via OSS goes to Modelo 369, not the 303.
Annual summary: Modelo 390
Modelo 390 is the informational annual VAT summary. It gathers what was declared across the four 303 filings of the year. Aikount prepares it from the same ledger data, so it reconciles with the quarterly filings.
Before you file
- Check that all sales invoices for the quarter are issued and all purchases imported and reconciled.
- Review the
303draft in the Taxes section. - File at the AEAT electronic office (you or your accountant).
- Mark the model as filed and keep the receipt.
Aikount prepares the
303; it doesn't file or pay it for you. Filing and payment are done by you or your accountant at the AEAT.
Check the dates in the Tax calendar.