Opening a Company in São Paulo: How to Choose the Right Tax Regime

Opening a company in São Paulo today is simpler than its reputation suggests. Most of the process is digital, deadlines have shrunk in recent years and, with the right paperwork in hand, a company can have an active CNPJ (company tax ID) within a few days.

The problem isn’t opening. The problem is what you decide while you open.

Amid the paperwork, the articles of incorporation and the choice of name, there’s a decision that almost slips by unnoticed — and that will define how much tax your company pays for years to come: the tax regime. It’s the most important part of the incorporation, and also the part most people treat as a detail. This guide exists so you don’t make that mistake.

What really happens when you open a company in São Paulo

Before the regime, it helps to understand the path. Opening a company in São Paulo, in short, runs through these steps:

Defining the corporate type — whether the company will have a single partner or more than one, and what legal form it will take.
Drafting the articles of incorporation — the document that states who the partners are, what the company does (the corporate purpose) and how it is divided.
Registering with the Board of Trade (JUCESP, in the state of São Paulo).
Obtaining the CNPJ from the Federal Revenue Service.
State and municipal registrations, depending on the activity — and, in the municipality of São Paulo, registration with City Hall for service companies.
Permits and licenses, when the activity requires them.
And, cutting across all of this, the choice of tax regime.

The first six steps are bureaucracy: with guidance, they get resolved. The seventh is strategy — and it’s the one worth spending your attention on.

The three regimes — in plain language, no legalese

Every company in Brazil is taxed under one of three regimes. Choosing is, in practice, choosing the logic by which the government will calculate your tax.

Simples Nacional (simplified tax regime)

This is the regime designed for smaller companies. It bundles several taxes into a single monthly payment slip and, in general, makes life easier for those just starting out.

In favor: less bureaucracy, a single slip, a rate that starts low for those who bill little.

The caveat: “Simples” (simple) is the name of the regime, not a promise that it’s always the cheapest. For certain service activities — especially those with a small payroll and high profit margins — the Simples bill can come out more expensive than another regime. The name fools a lot of people.

Lucro Presumido (presumed-profit regime)

Here the government presumes a fixed profit margin for your activity and charges tax on that presumption — not on the profit you actually earned.

In favor: if your company earns more than the presumed margin, you pay tax on a base smaller than the real one. For services with good margins, this is usually advantageous.

The caveat: if your company earns less than the presumption — or runs a loss — you still pay as if you had earned the presumed amount. The regime doesn’t forgive the bad month.

Lucro Real (actual-profit regime)

Tax falls on the actual profit, genuinely calculated in the accounting. It’s mandatory above a certain revenue threshold and for some specific activities.

In favor: if the margin is tight, or if the company runs a loss, you pay on what you actually earned — and losses can be offset in the future.

The caveat: it’s the regime that demands the most rigorous accounting and the best controls. It rewards those who are organized and punishes those who aren’t.

How the wrong choice costs dearly: an example

Picture two consulting firms, opened in the same month, in the same city, billing the same amount. One works almost entirely with the partners’ own labor — lean payroll, high profit margin. The other has a large hired team — heavy payroll, tighter margin.

If both, out of inertia, choose the same regime “because it’s what everyone chooses,” at least one of the two will pay too much tax — possibly for years, until someone notices. The first company, with high margin and low payroll, tends to benefit from one taxation logic; the second, with heavy payroll, from another. Same revenue, same city, same opening date — and very different tax bills, all because of one little box ticked at the start.

The lesson: there’s no “best regime” in the abstract. There’s the best regime for your company — defined by expected revenue, the weight of the payroll, the activity’s margin and the type of service. That’s why the choice isn’t made on a friend’s recommendation: it’s made through simulation, comparing the three scenarios against the business’s projected numbers.

Costs and timelines: what to expect

On timelines: with the right paperwork and an activity that requires no special license, opening in São Paulo usually gets resolved within a few business days for the registration and CNPJ part. What delays things most isn’t the system — it’s the wrong document, a poorly drafted corporate purpose and an unforeseen license.

On costs: there are the registration fees (Board of Trade, registrations) and there’s the recurring cost of monthly accounting, which every active company must maintain. It’s worth keeping the two separate in your mind: the cost of opening is small and one-off; the cost of maintaining is monthly and continuous — and it’s there, added to the tax, that the chosen regime will weigh every month.

The most common mistakes when opening

Treating the regime as a paperwork item. It’s the most strategic decision of the incorporation, not a formality.
Copying another company’s regime. “My cousin’s is Simples” is no criterion. His company isn’t yours.
Drafting the corporate purpose off the cuff. A poorly described purpose limits what the company can bill and can even block the classification that would be best for it.
Forgetting that you can change — but only in the right window. Switching regimes has a deadline set in the tax calendar. Getting it wrong at opening and missing the window means carrying the wrong choice for the whole year.

The first decision is the one that matters most

Opening a company in São Paulo is the easy part. Opening it well — with the right corporate type, a well-written corporate purpose and, above all, the right tax regime — is what separates a smooth start from a cost that drags on.

If you’re at this moment, don’t make the tax decision alone and off the cuff. It deserves a serious simulation, done before the articles of incorporation are signed — because correcting it afterward costs time, costs a tax window and costs money.

Opening a company in São Paulo? In /naprática you’ll find VMAHUB’s guides on how tax planning reduces the tax burden, the step-by-step of incorporation and what to check before signing the articles of incorporation. And if you want to make the regime choice with a simulation of your business’s numbers — before opening — talk to VMAHUB’s Consultative Accounting team. Starting right is far cheaper than correcting later.