Tools to manage your business better.
Practical calculators, guides and comparison tools for freelancers, small businesses and finance teams operating in Spain. Our tax calculators explain their results and reference official sources.
11 tools
Tax
VAT, withholding tax and Spanish Corporate Tax.
Invoicing VAT and IRPF Calculate VAT, IRPF withholding and the total of a professional invoice in seconds. Business taxation Spanish Corporate Tax Estimate gross Spanish Corporate Tax using the 2026 rates for micro-companies, small entities and newly created companies. Quarterly VAT Modelo 303 Estimate quarterly Spanish VAT payable or carried forward from your sales and purchase taxable bases.
Self-employed
Contributions and planning for people working for themselves in Spain.
Employment
Employer costs and contributions for your team.
Finance
Pricing, profitability and operating decisions.
Business management
Collections, deadlines and intra-EU transactions.
Collections B2B late-payment interest Calculate interest on unpaid commercial invoices using the Spanish statutory rate for each half of 2026. Tax obligations Spanish tax calendar Select your obligations and create a practical Spanish tax calendar with filing and direct-debit deadlines. Intra-EU transactions VIES VAT validator Check live whether an EU VAT number is valid in the European Commission’s official VIES service.
Comparison tools
Compare software for your business.
We could not find that tool
Try “VAT”, “self-employed”, “payroll” or “margin”, or choose another category.
When a calculator is not enough
Turn your results into decisions.
Speak to a Numonis adviser to put your figures in context and define the next step for your business.