When you set up a company in Uruguay, one of the questions business owners — especially foreigners — ask most is how far state control over companies goes. The National Internal Audit Office (AIN) has supervisory powers over certain entities, and knowing whether your company will fall within its scope matters for planning operations, compliance costs and the annual administrative burden. The SAS (simplified joint stock company) has become the most popular vehicle thanks to its fast incorporation, operational flexibility and lower running costs. But is it subject to AIN control like other types of companies in Uruguay? In this article we answer that question, explain when a company does have obligations with the AIN, what that control involves in practice and why it can influence which legal structure to choose for your project.

What Is the National Internal Audit Office (AIN)?

The AIN is a technical body of the Uruguayan State that reports to the Ministry of Economy and Finance. It audits public bodies and, in the private sphere, exercises the State’s control over commercial companies under the Commercial Companies Law (Law 16,060) and related rules.

For companies, the AIN’s role mainly involves:

• Legality review of corporations (SA): it reviews and approves the articles of SAs at incorporation and when they are amended, before registration.
• Special supervision of certain SAs: open SAs (listed or making public offerings), those with capital above the legal thresholds and other cases set by law are subject to closer ongoing supervision.
• Registry of financial statements: companies above certain size thresholds (assets or revenue) must file their financial statements with the AIN.
• Oversight of beneficial ownership compliance, together with the BCU, which keeps the registry.

Being subject to AIN control means additional administrative and financial burden: fees, formal filings and, in some cases, longer timeframes for incorporation and amendments. That is why it is a key factor when choosing between a corporation (SA), an SRL, an SAS or a sole proprietorship.

Is the SAS Subject to AIN Control?

As a rule, no. The SAS is not subject to the AIN’s legality review of incorporation and amendments that applies to SAs. This is one of the main advantages of this company type and largely explains its popularity among entrepreneurs, startups and SMEs.

Law 19,820, which created the SAS, established a simplified regime not only for incorporation — which can be done within a day through digital procedures — but also for its operation. Unlike the SA, whose articles and amendments must go through the AIN, the SAS is incorporated and amended without that review.

This has immediate practical effects: lower incorporation costs and times, no AIN fees for legality review, and faster amendments to the articles. For projects that are not capital-intensive, operate in digital or service markets and want operational agility, the SAS is a more efficient solution than traditional company types.

Points to Keep in Mind

• Size thresholds: the obligation to file financial statements with the AIN depends on the company’s size (assets or revenue), and generally applies to commercial companies above those thresholds. If your SAS grows significantly, check with your accountant whether it has to file.
• State shareholding: companies with state participation may be subject to additional controls.

What About the SRL and the SA?

The SA is the type most clearly within the AIN’s scope: its articles and amendments go through legality review, and certain SAs (open companies, those above capital thresholds, etc.) are subject to special supervision. The SRL is not subject to the AIN’s legality review either, but it does not offer the SAS’s ease of incorporation and management, especially if you want to buy a ready-made SAS and start operating immediately.

Which Entities Fall Under the AIN’s Scope?

To put this in perspective, the AIN’s control over private entities applies mainly to:

• Corporations (SA): legality review of incorporation and amendments.
• Open SAs and other SAs under special supervision: those whose securities are traded on the stock market, those above the legal capital thresholds and other cases provided by law.
• Mixed-economy companies: those in which the State participates with the private sector.
• Companies above the size thresholds: for filing financial statements.

Financial institutions (banks, financial firms), insurers and pension fund managers are regulated and supervised by the Central Bank of Uruguay (BCU), not the AIN.

For entrepreneurs who want to open a company in Uruguay as a foreigner, the SAS’s simpler regime is often a decisive factor.

Advantages of Not Going Through the AIN

Operating a company outside the AIN’s legality review brings concrete benefits in terms of cost, time and administrative flexibility.

Lower Costs

There are no AIN fees for the review of incorporation and amendments, and incorporation is faster. Note that external audits are not required by the AIN for a closed SA either; they depend on size, regulation or the requirements of banks and investors. To understand the full picture, see how much it costs to run a company in Uruguay.

Greater Agility

Amendments to an SAS’s articles do not wait for an AIN review, which speeds up changes in capital, purpose or governance. The SAS must still meet its tax obligations with DGI and its employment obligations with BPS, and it must keep accounts in line with commercial and tax rules.

Simpler Governance

The SAS can operate with a very simple structure, even a single administrator, without a statutory auditor. This freedom of organisational design makes for agile operations and quick decision-making.

Obligations the SAS Does Have

Not going through the AIN does not mean the SAS operates without controls. Every company in Uruguay — whatever its type — must meet legal, tax, accounting and employment obligations. Compliance is the responsibility of managers and partners, and breaches can lead to administrative, tax and even criminal penalties.

Tax Obligations with DGI

The SAS must register with the Tax Office (DGI), obtain its RUT and meet all the tax obligations of its activity: IRAE (corporate income tax, general rate 25%), VAT (22% basic and 10% reduced), IRPF withholding on employees’ salaries and Wealth Tax where applicable. DGI monitors compliance closely, and breaches lead to automatic fines and possible audits.

Employment and Social Security Obligations with BPS

If the SAS has employees, it must register as an employer with BPS, pay employer contributions, withhold employee contributions, file the monthly payroll declaration and comply with labour rules, including those of the Ministry of Labour (MTSS). Breaches can lead to fines and joint liability of managers.

Accounting and Registry Obligations

The SAS must keep accounts under the accounting standards applicable in Uruguay, keep its corporate books (minutes and share register) and keep its information up to date in the DGR’s Commercial Registry. It must keep supporting documentation for the legally required period and produce its accounts if audited by DGI.

Beneficial Ownership Declaration to the BCU

Every company in Uruguay, including the SAS, must declare its beneficial owners — the individuals who ultimately own or control it — to the Central Bank of Uruguay (BCU). This is part of the anti-money laundering framework, and non-compliance can lead to penalties and operational restrictions.

Frequently Asked Questions

Can an SAS voluntarily submit to AIN control?

There is no general mechanism for that. If investors, banks or partners require audited financial statements, you can hire an external audit voluntarily without being under AIN control. If a project needs the structure and formalities of an SA, it is worth considering an SA from the outset.

If my SAS grows a lot, does it come under AIN control?

It does not become subject to the legality review that applies to SAs, but size can trigger other obligations, such as filing financial statements with the AIN once the thresholds are exceeded. At a certain size it may also make sense to transform into an SA for other reasons: institutional financing, a possible listing, strategic investors or more sophisticated governance.

Does not being under the AIN mean less transparency or more regulatory risk?

No. The SAS is fully regulated by Law 19,820 and subject to the same tax, employment and commercial requirements as any other company. DGI supervises all companies closely through data cross-checks, audits and automatic controls. Not going through the AIN is a feature of the SAS’s legal design, intended to simplify small and medium-sized businesses without sacrificing transparency or legal certainty.

Conclusion

The SAS is not subject to the AIN’s legality review, which is a significant advantage in cost, simplicity and agility. For most entrepreneurs and business owners who want to operate in Uruguay, the SAS offers the ideal balance between legal formality, limited liability and efficient management. However, choosing the right company type requires assessing not only the supervisory regime but also your financing needs, growth plans, activity, partner and investor profile and medium- and long-term tax strategy. At sociedadesanonimas.uy we have incorporated more than 500 companies, have specialised experience with all company types and offer 100% online procedures so you can incorporate within a day. We support you from choosing the most suitable structure to meeting all your obligations with DGI, BPS, the AIN (where applicable) and the BCU. Book a consultation with our team.

Note: the information in this article is general and does not constitute personalised legal or tax advice. Each situation must be assessed on its own facts. Always consult specialised professionals before making legal or tax decisions.