Calcsmiths
Free tools for freelancers, employees and households in Spain. Everything is calculated in your browser: this site doesn't send what you type anywhere.
Invoicing
Invoices, quotes, VAT and withholding.
- VAT and IRPF calculator for SpainSpanish VAT (IVA) and IRPF withholding calculator for freelancers: from the base to the invoice total and the net you receive, or backwards from the total with VAT or from the net you want. VAT 21/10/4%, withholding 15/7/19% and recargo de equivalencia.
- Spanish invoice template for freelancers (IVA and IRPF)Create Spanish invoices and quotes as PDF: 21, 10, 4 or 0% VAT (IVA) per line, 15% or 7% IRPF withholding, automatic numbering and NIF and IBAN validation. Free, no sign-up.
- Self-employed fee Spain 2026: autónomo quota calculatorWork out your 2026 autónomo Social Security fee in Spain from your net earnings: bracket of the reduced or general table, minimum and maximum base, monthly and yearly fee, with or without the €80 flat rate. Sole trader or company partner.
- Spanish forms 303 and 130: quarterly boxes for the self-employedType your quarter totals and get the main boxes of form 303 (VAT: output, input, result, to carry forward or to refund) and form 130 (income tax instalment in estimación directa: 20 % of the year-to-date profit, withholdings, reduction), with the filing deadlines.
- Spreadsheet templates: quarterly tax tracker and rent ledgerExcel templates for freelancers in Spain and for landlords and tenants: an invoice and expense tracker whose summary fills in the boxes of models 303 and 130 per quarter, and a rent ledger with monthly payments, IPC/IRAV updates, deposit and receipts. Opens in Excel, LibreOffice and Google Sheets.
Payroll
Net salary, autónomo fee and final pay.
- Net salary calculator Spain 2026 (Catalonia)Net salary calculator for employees in Catalonia, Spain, 2026: from annual gross to monthly net in 12 or 14 payments, with Social Security, IRPF withholding using the Tax Agency (AEAT) algorithm and an estimate of the annual income tax with the Catalan scale.
- Severance pay calculator Spain 2026: finiquito and dismissal payWork out your final pay settlement (finiquito: days worked, unused holiday, pending extra payments) and the statutory severance for unfair, objective dismissal or end of a fixed-term contract under Spain's Workers' Statute, including the split for contracts signed before 12 Feb 2012.
Housing
Buying a flat and rent updates.
- Update rent in Spain by CPI (IPC) or IRAVWork out the yearly rent update in Spain with the general CPI (IPC) or the rent reference index (IRAV) of any month published by INE, or with the percentage in your contract: new rent, monthly and yearly difference, and a letter to notify it.
- Buying a home in Catalonia 2026: taxes, costs and mortgageWork out the costs of buying a home in Catalonia in 2026: transfer tax (ITP, progressive scale and reduced rates) or VAT + stamp duty for new builds, notary and land registry estimates, appraisal, the cash you need and the monthly mortgage payment.
Utilities
Working days, numbers in words and validators.
- Working days calculator for CataloniaCount the working days between two dates or add N working days to a date, with Catalonia's public holidays and your municipality's local holidays. Saturdays counted or not, with the list of holidays in the period.
- Numbers to words: euro amounts for cheques and contractsWrite a number or an amount in euros out in words in Catalan, Spanish and English: “one thousand two hundred thirty-four euros and fifty cents”. Uppercase for cheques, invoices and contracts. Runs in your browser.
- Spanish NIF, NIE, CIF and IBAN validator and generatorValidate a Spanish NIF, NIE, CIF or IBAN: detects the type, says whether it is valid, why not (with the correct control letter) and formats it. Validates lists and generates valid test data for developers.
- Printable maths worksheetsGenerate primary-school maths worksheets as a PDF: addition, subtraction, times tables, division and mixed operations. Pick the level, the number of exercises and the columns, and print them for free.
- Printable calendar with Catalonia holidaysPrintable yearly calendar PDF (A4, 12 months, weeks starting on Monday) with Catalonia's public holidays and your municipality's local holidays highlighted and a legend. Printable 2026 calendar for Catalonia.