Choose your calculation and see the result without registering

Work out what you need to pay and how much you’ll have left. Check the amounts before issuing an invoice or setting money aside for taxes and social security contributions.
Self-employed social security contribution calculator

Estimate your monthly social security contribution based on your net earnings. Check the income bands, adjust your contribution base and compare the result with the reduced flat-rate contribution, tarifa plana.

Calculate my contribution
VAT calculator

Add VAT to a price or calculate the amount before tax from the total. See the net amount, VAT and final price using standard rates or a custom percentage.

Calculate VAT
Your AI tax assistant - more than a calculator

Ask a question about taxes in Spain. Get an answer and explanations of calculations for free, without registering.

Ask a question

Understanding your numbers is part of working for yourself

How much VAT should you add to an invoice? What self-employed social security contribution can you expect? How much is left after expenses? We create these calculators to help you answer the questions that come up when running your business in Spain. Our goal is to help you compare options, plan payments and make informed decisions, even without accounting experience.

What is Conta.es?

Conta.es is invoicing and accounting software for self-employed people in Spain. It supports invoicing with VeriFactu and helps you record income and expenses in one place. Stay on top of your accounting: understand where your money comes from, where it goes and how your business results change. Clear records help you keep your finances under control and make decisions based on your own data.

You can manage your accounting yourself or work together with your accountant. Accounting plans start at €9 per month.

Automate my accounting Watch the video: how the system works
Up to 10 invoices a month for free

Start with your invoices. For free.

Issue up to 10 invoices a month with the free Conta.es plan. Choose invoicing with or without VeriFactu according to the requirements that apply to your business. Add your logo, save your customers and services, and send invoices by email or share them via WhatsApp. If you later need more invoices or additional accounting features, you can choose a plan that suits your business.

Use the free plan See how invoicing works

Coming soon: more calculators for the self-employed in Spain

We’re developing new tools to help self-employed people in Spain calculate tax withholding, estimate their quarterly taxes and find out how much is left after expenses, taxes and social security contributions.
Invoice calculator with VAT and IRPF withholding

Calculate VAT, IRPF withholding and the total amount to collect. Check your invoice calculations before sending it to your customer.

Quarterly VAT calculator · Modelo 303

Estimate your quarterly VAT return result based on VAT charged on sales and deductible VAT on expenses. Plan ahead for how much you may need to pay.

Quarterly IRPF calculator · Modelo 130

Estimate your quarterly IRPF payment, taking into account income, deductible expenses, withholding and previous payments. Plan how much to set aside for taxes.

Net income calculator for the self-employed

Find out how much of your invoiced income is left after expenses, taxes and self-employed social security contributions. Estimate how much you need to invoice to reach your target net income.

FAQ

Yes. The calculators available on this page are free to use and do not require registration. Choose the tool you need, enter your details and view the result.
It depends on the tool. To calculate VAT, you need an amount and the rate you want to apply. To estimate your self-employed social security contribution, the simulator will ask about your net earnings and contribution options. Each calculator explains what information to enter.
Yes. You can change the amounts and settings to see how the result changes. For example, compare prices at different VAT rates or explore how your estimated self-employed social security contribution varies.
No. The calculators help you check amounts and obtain estimates based on the information you enter. They do not file tax returns or complete procedures with the Spanish Tax Agency or Social Security.
The result depends on the information you enter and the assumptions used by each tool. Your circumstances may involve adjustments, reductions or other factors that the calculation does not cover. Read the calculator’s explanations and consult your accountant if your situation needs individual assessment.
Yes. The free plan lets you issue up to 10 invoices a month. You can add your logo, save customers and services, and send invoices by email or share them via WhatsApp.
A calculator answers a specific question using the information you enter. In Conta.es, you can save your invoices, record income and expenses, and keep your business information organised, without starting from scratch every time you need to check it.