Working a Job and Freelancing at the Same Time: How It Works in Portugal

You have a full-time job and you’re thinking of taking on some extra projects? Good news: it’s completely legal in Portugal. You can be an employee and a freelancer at the same time — and many people do exactly that.

Here’s the practical guide to how it works.

How to open an activity while keeping your job

The process is the same as any other activity registration — you just don’t need to quit your job first.

Log into the Portal das Finanças with your NIF and password
Go to “Serviços” → “Atividade” → “Declarar Início”
Choose the start date
Select the activity code (CAE/CIRS) for what you’ll be doing
Choose the Simplified Regime (Regime Simplificado)
Submit

The process takes about 5 minutes. No fees, no special bureaucracy. You have both statuses from the moment you click “Submit”.

Income tax with two income sources

When you file your annual income tax return, you’ll have income from two categories:

Category A — your salary (the company already withholds monthly)
Category B — your freelance income

Income tax adds everything up and applies the normal progressive rates.

For Category B income under the simplified regime, the 0.75 coefficient applies — meaning only 75% of what you invoiced is considered taxable income. If you invoiced €12,000 as a freelancer, the tax authority only taxes €9,000.

Example: Tiago has an annual gross salary of €18,000 and invoiced €10,000 as a freelancer.

Taxable income Category A: €18,000
Taxable income Category B: €10,000 × 0.75 = €7,500
Total taxable: €25,500

The company already withheld income tax throughout the year on his salary. In the annual declaration, Tiago may even be entitled to a refund, depending on the total of withholdings.

The salary goes into the return via Anexo A, which comes pre-filled. To understand what each field means - and two things that trip up people with both a salary and recibos verdes - see the Anexo A guide for freelancers.

This is the best news for those who already have a job: if your employer already deducts Social Security for you, your freelance income is treated differently.

The contribution exemption exists, but it has cumulative conditions — all of them must hold at the same time:

Your salary from employment is at least 1 × IAS (€537.13/month in 2026)
The employment and the freelancing are for different entities (and outside the same corporate group)
The employment regime covers all the eventualities of the independent workers’ regime
Your average monthly relevant income from freelancing — for services, 70% of what you invoice — stays below 4 × IAS (€2,148.52 in 2026). In practice: up to around €3,069/month invoiced.

And the exemption comes with a bonus: while you meet the conditions, you’re also exempt from the quarterly SS declaration — the official Social Security guide lists accumulation with employment among the cases not required to declare. If your relevant income exceeds the limit in a quarter, you file the declaration in the next declaration window (January, April, July or October) — and contributions are charged only on the part that exceeds 4 × IAS, not on everything.

The most common mistakes

Not issuing invoices because “it’s a small amount”

All income must be invoiced. Even €100 from a friend. If the client is a private individual and doesn’t want to give their NIF, you issue the invoice as Consumidor Final (end consumer). But you always issue one.

Forgetting the quarterly declarations

Your obligations depend on your situation — and this is where many people slip. If you’re exempt from contributions due to accumulation with employment, you don’t file the quarterly SS declaration; but if you exceed the threshold in a quarter, you have to start filing. And the quarterly VAT declaration only exists in the standard regime — those exempt under Article 53 don’t file it regularly (only for periods with self-assessed VAT on foreign purchases). Check your case and put the right deadlines in your calendar.

Mixing personal and professional expenses

Bought a new computer? You can deduct it as a professional expense — but only if you use it for work. If it’s mixed use (personal + professional), only the professional proportion is deductible.

The advantages of having both statuses

Beyond the extra income, there are practical benefits:

Financial security — if the job ends, you already have an activity and clients
Diversification — you don’t depend on a single income source
Validation — you test business ideas without quitting your job

Ana, an English teacher, started giving private lessons (€400/month) while keeping her job. Two years later, the tutoring had grown — and she had the security to gradually transition to freelancing full-time.

✅ In summary

It’s 100% legal to be an employee and a freelancer simultaneously in Portugal. Open your activity on the Portal das Finanças in 5 minutes — you can do it today.
For income tax, both incomes are added together, but under the simplified regime only 75% of freelance income is taxable. For Social Security, if you meet the accumulation-exemption conditions, you won’t pay extra contributions — and while the exemption lasts, you don’t even file the quarterly declaration.
With FIZ the quarterly declarations are automatic — VAT and Social Security submitted on time, without you having to think about it. Even with two income streams, your admin doesn’t get more complicated.