TAX 1 min
Invoicing
VAT and IRPF
Calculate VAT, IRPF withholding and the total of a professional invoice in seconds.
Open tool
Back to free tools
Modelo 303 VAT Calculator
Estimate quarterly Spanish VAT payable or carried forward from your sales and purchase taxable bases.
Estimated amount payable€1,470.00
- Output VAT
- €2,520.00
- Deductible input VAT
- −€1,050.00
- Difference
- €1,470.00
- Previous VAT available to carry forward
- −€0.00
Simplified estimate. It does not cover every field, scheme or adjustment in the official Modelo 303 return.
Indicative estimate. Check the assumptions, exclusions and official sources before making a decision.
This is an indicative estimate based on the information entered. Review the assumptions before making a tax or financial decision.
Methodology and sources Reviewed 28 August 2026 · We do not store the amounts you enter
Validity and privacy
- Effective from
- 1 January 2026
- Valid through
- 31 December 2026
- Privacy
- The calculation runs in your browser.
Main assumptions
- Only VAT at 21%, 10% and 4% is calculated.
- The input VAT entered is tax-deductible.
Not included
- Pro rata rules, cash accounting, simplified schemes, equivalence surcharge, imports and advanced adjustments.
- The tool does not prepare or file the official return.
Official sources
Frequently asked questions about Modelo 303
What is the difference between output and deductible VAT?
Output VAT is charged on sales. Deductible input VAT is paid on purchases linked to the activity that meet the applicable requirements.
Is a negative result refunded?
It is normally carried forward to later periods. In the final period, a refund may be available depending on the circumstances.
Does this replace the official form?
No. This is a simplified estimate. Use the official AEAT service or your adviser to prepare and file the return.
When the estimate is not enough
We put the numbers in context.
Speak to a Numonis adviser about your specific tax, employment or financial situation.