Resources
Free tools and resources for freelancers in Spain.
Estimate your contribution, separate VAT and income tax, prepare an invoice or check a tax obligation. Five tools and five practical guides, with no sign-up and official sources in plain sight.
- 5 tools, no sign-up
- 2026 guides and calendar
- Reviewed 14 Aug 2026
What do you need to solve?
Choose a question and we will point you to the resource that solves it.
Calculators for freelancers
Solve one concrete calculation and get on with your day
Each tool does one job and explains what it needs, how it gets the result and what it leaves out. They work on mobile and do not require an account.
Invoice generator
Fill in the essential details and download a PDF invoice ready to review.
Create a PDF invoiceHow much to invoice calculator
Start with the net income you want to keep and calculate what you need to invoice each month.
Calculate target2026 self-employed contribution calculator
Find your band, the base you can choose and an estimated monthly and yearly payment.
Calculate contributionVAT and income tax calculator
Add or separate taxes and withholding on an invoice without doing the arithmetic by hand.
Separate taxesHours worked calculator
Add shifts, breaks and periods to get the hours and minutes actually worked.
Add hours
The calculations run in your browser. The data you type is not used to create an account or sent away to produce the result.
Free · no emailGuides to invoice and comply
Understand the obligation before touching the software
Electronic invoicing, VeriFactu, tax dates and product help, explained separately. Each guide includes scope, examples, a review date and sources.
VeriFactu guide
What the system requires, who it affects, which dates apply and how invoicing software must respond.
Tax calendar
Deadlines for forms 303, 130, 111 and 115, quarterly filters and the AEAT source.
Help centre
Answers about invoices, taxes, accounts and error codes, searchable by problem.
Blog
Practical articles about invoicing, payments, taxes and organisation for freelancers and small businesses.
Editorial standard
Reviewed data, clear limits and official sources
A tax calculator is only useful when you can see its tax year, the source of every changing figure and the point where an estimate is no longer enough. Each tool shows that information beside the result.
Hub last reviewed
- 01
Tax year shown
Figures that change every year always state the tax year they belong to.
- 02
Source beside the figure
The official reference appears where it is used, not hidden in a generic note.
- 03
Scope explained
Each result distinguishes guidance, calculation and an official filing or procedure.
Doubts
Before using an online tax calculator
No. The tools in this section work by typing your numbers and reading the result. There is no sign-up form, no confirmation email and no trial that runs out. An account is only needed for the invoicing software, which is a different thing and is paid for.
When calculating is no longer enough
The software does these sums on its own: the invoice carries its VAT, the withholding is already in, and the quarter adds up without you opening a calculator.