Becoming self-employed in Spain: how the Autónomo registration works

What is an Autónomo?

An Autonomo is the Spanish term for a self-employed person or freelancer, comparable to a sole trader in the UK or a self-employed individual in the US or Australia. You work on your own account, are responsible for your own tax returns and pay a monthly social contribution to the Seguridad Social.

Unlike being an employee, you build your own social security cover: illness, disability and pension are all your own responsibility. In return, you are completely free in how, when and for whom you work.

Who needs to register as an Autónomo?

As soon as you regularly carry out economic activities in Spain with the intention of making a profit, you are legally required to register. There is no minimum income threshold. Whether you earn 500 or 5,000 euros per month, the registration obligation applies from the moment you are commercially active.

Failing to register leads to fines from both the Agencia Tributaria and the Seguridad Social. The cost of catching up almost always exceeds the cost of registering correctly from day one.

What do you need to register?

Before you can register as an Autonomo, you need two things in place:

A NIE number. This is your tax identification number in Spain. Without a NIE you cannot submit any official form. Do not have one yet? Start with the NIE module.

A digital certificate. This is your digital signature for submitting the Modelo 036 and all other forms online with the Spanish authorities. The Digital Certificate module walks you through it step by step.

The two mandatory registrations

Registering as an Autonomo involves two separate steps, both of which are compulsory:

• Agencia Tributaria (Hacienda). Here you submit the Modelo 036, declaring that you are starting as a business owner, what activity you carry out and whether you are liable for VAT. If you want to work with businesses in other EU countries using the reverse charge mechanism, open the 'Otros datos de IVA' tab in the Modelo 036 and complete the 'Registros' section. Only then will you be registered in the VIES system.

• Seguridad Social (RETA). Within 30 days of registering with Hacienda, you register in the Regimen Especial de Trabajadores Autonomos. This covers your social security and pension entitlement.

What does an Autónomo pay monthly?

From 2023, your monthly contribution is based on your expected net income. Contributions range from around 200 euros per month for the lowest incomes to 590 euros per month for the highest.

Registering as an Autonomo for the first time? You are entitled to the Tarifa Plana: for the first 12 months you pay just 80 euros per month regardless of your income. You must actively request this benefit when you register.

What taxes do you pay?

As an Autonomo you file quarterly tax returns. The two main ones are:

• IRPF (income tax). Via the Modelo 130 you pay 20% of your quarterly profit as an advance payment. If you work exclusively for Spanish clients with a retencion of 15%, you do not need to file a Modelo 130.

• IVA (VAT). Via the Modelo 303 you pay the difference each quarter between the IVA you have invoiced and the IVA you have paid on business costs. The standard rate is 21%.

Set aside at least 30 to 35% of your income for taxes and social contributions.

Registering as an Autonomo in Spain in 2026: why getting it right matters

Spain has simplified the Autonomo rules considerably in recent years. The income-based contribution system makes starting out more affordable than ever. That said, the process remains complex for those who do not know the system. Taking the right steps in the right order is the difference between a clean start and an expensive correction.