Kit Útil helps autónomos in Spain estimate RETA contributions, quarterly IVA (303), IRPF payments (130), and first-year costs. Free browser tools with clear educational disclaimers (not AEAT/TGSS advice). Optional Kit Autónomo pack 19€ PayPal one-time.
Built to make the first-year and quarterly tax basics easier to understand for Spanish autónomos, with practical calculators and a clear educational disclaimer instead of jargon or black-box advice.