Calcu-Inversiones
Investment portfolio simulator: split your money across bonds, equities, gold or bitcoin and see where it lands, with compound interest and inflation.
Calculators
Calculators for salary, severance, freelancers, VAT and investments. Everything runs in your browser, with no sign-up and current Spanish figures.
El Finiquito
Severance and dismissal compensation calculator: check, item by item, whether the figure your employer offers is the one you are owed.
CalcuAutónomo
Calculator for the self-employed: from what you invoice to what you can actually spend, separating expenses, contributions, VAT and income tax.
CalcuIVA
VAT calculator: add or remove 21%, 10% or 4% from any amount and see which part is yours and which part you're holding for the tax office.
CalcuNeto
Net salary calculator for Spain: from gross annual pay to the money that actually lands each month, with the tax and social security breakdown.
CalcuHipotecas
Mortgage calculator: the monthly payment, the interest over the whole life of the loan and the purchase costs that eat the deposit.
CalcuPensión
Retirement pension calculator: how much is left each month, when you can retire and what each extra year of contributions adds.
About this discipline
The most-searched calculations in Spain are scattered across simulators that demand sign-up, someone else’s spreadsheets and articles that never quite answer. We build them one at a time and properly: VAT, net salary, freelance contributions, mortgages, severance, retirement pensions and compound interest.
They all work the same way: type in your numbers and see the full breakdown, formula included. The maths runs in your browser, so nothing you type leaves your machine. They are estimates for understanding your situation and comparing scenarios, not advice.
Frequently asked questions.
Is my data sent anywhere?
No. The maths happens in your browser: the numbers you type never leave your machine and are not stored on any server.
Can I treat the results as tax or employment advice?
No. They are estimates to give you an idea and compare scenarios. Every situation has its quirks, so check with a professional before an important decision.
Are they free, and do I have to register?
Free and with no sign-up. Open the one you need, use it, done.
Can you build a calculator for my site?
Yes, it is one of our most common commissions: your own calculator, with your branding, embedded in your site and running the formula you need.