Pedro always told me over coffee: “This freelancing thing is way too complicated — I’d rather stick with my steady wage.” Until the day his employer closed. A week later, he was sitting across from me, laptop open: “So… how do you actually open an activity?”
Here is what happened during his first month — and what will probably happen to you. Spoiler: it is far less dramatic than it sounds.
Day 1: The Finance Portal (5 minutes, really)
Pedro logged into the Portal das Finanças at 10am. By 10:05 he was a registered independent worker.
The process: log in with Chave Móvel Digital (Portugal’s digital ID system), navigate to “Atividade” → “Entregar Declaração de Início”, choose the CAE activity code (he chose software development), confirm the address, submit. Done.
“Is that it?” he asked.
That is it. The system automatically assigns your activity code. No queues, no fees, no waiting period. You are a freelancer from that moment on.
Week one: the first client and the invoice panic
Three days later, Pedro landed his first client — a local bakery that needed a website. €800 for the work.
“Now what? How do I issue an invoice?”
Here is what most people do not know: in Portugal, invoices issued by independent workers must be created through certified software or through the Finance Portal itself. A nicely formatted Word document does not count.
With certified software, the process is straightforward: enter the client’s NIF (tax number), describe the service, set the amount. The invoice comes out with an ATCUD code (mandatory since 2023), a QR code (mandatory since 2022), and sequential numbering — all required by law. You can send it via WhatsApp, email, or print it. Two minutes at most.
“I’m scared of doing something wrong,” Pedro said before clicking to issue it.
That feeling is completely normal. But with certified software, it is very difficult to make a mistake — the system validates all required fields before issuing.
Week two: the unnerving silence
“Nobody from the tax authority has called me yet,” Pedro said when we met for coffee.
That is exactly how it works. Nobody calls. Nobody knocks on your door. The AT does not send a congratulatory letter.
What do you actually need to do at this stage? Issue invoices when you provide services. That is essentially it.
Pedro had already issued three invoices. Total time spent on admin: around ten minutes.
Worth noting: Many people assume that the simplified regime (regime simplificado) means the government handles everything. It does not. “Simplified” refers only to how your tax is calculated — the state applies a coefficient to your income (0.75 for most liberal professions listed under Article 151 CIRS, meaning 75% is taxable). You are still responsible for filing your own declarations.
Week three: the inevitable questions
“When do I actually have to pay something?” — the question every new freelancer eventually asks.
For someone starting out on the simplified regime, here is the short answer:
- Social Security: you are exempt from contributions for the first twelve months of activity
- VAT: if you expect to invoice less than €15,000 per year, you can apply the Article 53 CIVA exemption — you do not charge VAT to clients and do not file periodic VAT returns
- Income tax (IRS): the annual declaration is filed between April and June of the following year
“When do quarterly declarations start?”
From the second year of activity, you file the quarterly Social Security declaration. If you are VAT-registered (because you exceeded the €15,000 threshold or chose to register voluntarily), you also file a quarterly VAT return. With the right software, both are submitted automatically.
End of month: the surprise
“Do you know how much time I spent on accounting this entire month?” Pedro asked.
We worked it out:
- Opening the activity: 5 minutes
- Issuing 12 invoices: 24 minutes (2 minutes each)
- Logging expenses: 10 minutes
- Total: 39 minutes
Under an hour for an entire month — and he was still learning.
“The hardest part was before I started,” he admitted. “I kept putting it off because I thought it would be a nightmare.”
The fears that never materialised
Pedro had a mental list of worries:
- “I’ll make a mistake and get a massive fine” — certified software validates everything automatically
- “I’ll forget a deadline” — with automatic declarations, it is very hard to forget
- “I’ll spend hours on paperwork” — it was 39 minutes in total
- “I’ll need an expensive accountant” — on the simplified regime, software handles most of what an accountant would do
- “I won’t be able to keep my finances organised” — automatic bookkeeping handles it
One month later, none of the five had come true.
What Pedro learned (and what you will learn too)
Week 1: Opening your activity is remarkably easy. The hard part is deciding to do it.
Week 2: Issuing invoices with certified software is faster than contactless payment at the supermarket.
Week 3: The tax authorities are not watching you. As long as you issue invoices and meet your obligations, you are fine.
Week 4: The time you imagined spending on admin? It is literally minutes per month.
Marta, a designer I have known for years, once told me: “I spent more time worrying about whether to open my activity than I now spend on all my tax obligations in an entire year.”
The monster lives in your head. Not in the Portal das Finanças.
✅ In summary
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Opening your freelance activity takes 5 minutes on the Portal das Finanças, using your Chave Móvel Digital. No queues, no fees, no waiting — you are a registered independent worker from that moment on.
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Your obligations in the first year are minimal: twelve months exempt from Social Security contributions, VAT exemption up to €15,000 annually under Article 53 CIVA, and income tax is only declared the following year.
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With FIZ you can issue certified invoices in two minutes, quarterly declarations are filed automatically, and you have protection against fines — so you can focus entirely on the work that actually matters.
