Resources for freelancers and businesses
Calculators and guides for your business.
Check invoice amounts, prepare your documents or find the deadline you need. Free tools and practical guides for everyday business tasks.
Open calculators, no sign-up. Tax resources for Spain.
What do you need to work out?
From amounts to a document
Check the taxable amount, VAT and withholding first. Then prepare your invoice with supplier and customer details.
Find the tool for your calculation
Each tool explains the inputs, how the result is calculated and the assumptions to review. Try them without creating an account.
8 tools
VAT and withholding calculator
Break down the taxable amount, VAT, withholding and amount payable. Check the difference between the total and what you receive.
Taxable amount, taxes and resultOpen toolInvoice generator
Add supplier, customer and line items. Review the amounts and generate a PDF for a one-off task.
A document with your detailsOpen toolHow much to invoice
Start with your target net income. Add expenses and compare your monthly target with the days you can invoice.
From your target to monthly revenueOpen toolSelf-employed contributions
Estimate contributions based on earnings. Review the band, contribution base and breakdown for your scenario.
Contributions and earningsOpen toolSelf-employed take-home pay
Enter what you invoice and your expenses: see your payslip, your year month by month and what an expense really costs.
From revenue to net incomeOpen toolEquivalence surcharge
Calculate the taxable amount, VAT and surcharge separately, then check the total.
VAT and surcharge breakdownOpen toolLate payment interest
Estimate interest on an outstanding amount using a rate and period. Check which conditions apply to your case.
Amount, period and interest rateOpen toolHours worked
Enter start times, finish times and breaks to total your workday. Review daily and weekly hours.
Working time and breaksOpen toolTax calculations are estimates. Check the tax year, assumptions and your circumstances before making a decision.
Understand what to check and where to go next
Some questions need more than a calculator. Find a guide to prepare a document, identify a procedure or check the information.
Tax forms, templates and specific cases
Guides available in Spanish. Each resource explains its scope and sources.
Learn from everyday business situations
Guides that connect your documents to what happens next: corrections, payments and working with your accountant.
Articles in Spanish
How to correct an invoice
When to use a corrective invoice and how to link it to the original document.
What to do when a customer does not pay
Organise your records and follow-up before deciding on the next step.
What to send to your accountant
Prepare invoices, expenses, payments and outstanding issues for a clearer monthly close.
Is your question about Factuarea?
Find instructions for using the app or speak directly to our team. Moving from another program? We can help you review the change.
From an estimate to an informed decision
Read each tool’s assumptions and check official sources for deadlines and procedures. An estimate does not file a tax return or replace your accountant’s review.
Questions about these resources
Before you begin
Yes. You can use the calculators and invoice generator without a Factuarea account. The invoicing application has separate plans and a 10-day trial.
A more connected businessToday’s calculations, connected to tomorrow’s business
Discover how Factuarea brings together invoices, customers, expenses, payments and reports, with your team and human help when needed.