Financial education
Clear guides explaining the concepts behind the calculators, organised by topic. Pick a category.
Saving and Investing
Clear guides on how money grows: interest, compounding, saving and government debt.
5 articles →Taxes
Who pays what and why: VAT, inheritance, gifts, wealth tax and non-residents.
24 articles →Self-Employed
How bracket-based contributions work and what goes in each quarterly return.
15 articles →Companies
What corporation tax charges, the rate actually paid, and when it falls due.
4 articles →Property
Where each figure comes from: cadastral value, reference value and what rests on them.
14 articles →Employment
Payslip, final pay, dismissal and benefits: what you get and how it is worked out.
15 articles →Maths
The formula behind each operation, explained with examples you can repeat by hand.
4 articles →
How to use this section
Each guide explains a concept practically, with a worked example and the sources it rests on, and links to the matching calculator so you can try your own numbers. This is educational content, not financial advice.