The corporate rituals a one-person company (Unipessoal Lda) can't skip

I ran companies in Sweden, Norway, and Denmark before I moved to Portugal, so writing decisions down wasn't new to me. A Swedish AB keeps minutes: you hold the meeting, note what was decided, sign it, and the signed paper goes in a folder for as long as the company exists, well past the seven years you keep the books. Simple.

What I didn't know was that Portugal has a book for it. Not a signed sheet you file away, a livro de atas, a book of minutes that the company's decisions live in. And I didn't expect my one-person Unipessoal Lda to need one at all.

Historically that book was literal: numbered, dated pages with a formal opening and closing, closer to a ship's logbook than a folder of printouts. You don't even have to legalize it at a registry anymore, the same quiet deregulation Sweden went through.

A Unipessoal Lda doesn't feel like a company that needs ceremony. There's one owner, one quota (the Lda's version of a shareholding), and most days it's just you and a laptop. So when my solicitor told me I needed a document on file to take no salary as manager, my first reaction was: a document? For a decision I made on my own, about paying myself nothing? He confirmed I needed it. He didn't say how to produce it. That part I worked out myself.

The document is an ata, a record of a company decision, and it lives in that book. It's the proof a decision was actually made. No ata, no proof.

Part of my confusion was that I'd never come across a company like this before. In the Nordics there's really one kind of limited company for a small business, and it's a share company: even a one-person version has shares you can transfer, started with a small amount of capital, 25,000 kronor in Sweden since 2019, a couple of thousand euros. The rules stay light while you're small and tighten only past certain thresholds: a Swedish AB doesn't even need an auditor until it crosses two of three limits on staff, turnover, and assets. One form, scaled to size.

Portugal splits that into two. The sociedade anónima (SA) is the share company you'd recognize: shares, fifty thousand euros to start, built for taking on investors. The form most small businesses actually use is the other one, the sociedade por quotas, the Lda, and before Portugal I'd never heard of a company built this way. Its capital isn't shares, it's quotas. A quota is your slice of the company, one per owner, not a stack of tradeable units you hand out. Your stake is the value of your quota against the total capital, so a 30,000 euro quota in a 100,000 euro company is 30 percent. There's no share count, just that ratio.

Which is why bringing in a partner isn't "issuing shares". You either split your own quota and transfer a piece, or the company raises its capital and the new owner pays in for a new one, and both usually need the other owners' consent and a registered act. The day a Unipessoal Lda takes on a second owner, it drops the "Unipessoal" and becomes a plain sociedade por quotas.

The paperwork was the part that did carry over. Writing the sole owner's decisions down isn't a Portuguese invention, it's European: a directive on single-member companies (2009/102/EC) requires exactly that, across every EU and EEA country. Which is why I'd been doing a version of this in Sweden without ever calling it a ritual. The company form was new to me. The minute-taking wasn't.

Most of what a small Lda has to write down is short and repeats every year:

• Approving the year's accounts. Annual, not optional, due by the end of March.
• Deciding what happens to the profit: leave it in the company, or pay it out.
• The manager (gerente) and their pay, including the decision to pay nothing.

That last one caught me, and it's the one with a price tag.

The part the "you need a document" conversation skipped is the cost. Deciding the gerente takes no salary doesn't mean the company pays nothing. A gerente has to be registered with Social Security, and even on a zero salary there's a minimum contribution, based on one IAS, around 2,200 euros a year in 2026. There's an exception called acumulação if you already pay Social Security as a self-employed worker above the minimum, but it depends on your exact situation and the rules have shifted over the years, so treat it as a question for your accountant, not a given. The unpaid-manager decision and the Social Security bill are the same decision. The ata makes the decision real. The contribution is what it costs.

You can keep the book on paper or digitally. The digital version is fully legal as long as each ata is signed with a qualified electronic signature, and Portugal gives you one for free: the Chave Móvel Digital you probably already use to log into the tax portal produces exactly that kind of signature. A signed PDF can carry the same legal weight as a signed page in a bound book. Portugal has been quietly turning its paper artifacts digital for years, the physical company card went the same way, though getting into the digital versions can be its own adventure.

If you run a one-person Lda, the practical version is small. A handful of decisions a year that need to exist on paper, one of them with a Social Security cost attached, and you can do the whole thing digitally with a signature you already own. My solicitor told me I needed it but not how. This is the note I wish someone had handed me.