Five Common Legal Mistakes When Starting a Business

May 4, 2026

Entrepreneurship is one of the most important professional decisions and also one of the ones that carries the greatest legal risk if not done correctly. For this reason, Legálitas Negocios identifies the five most common legal mistakes entrepreneurs make when starting their activity and offers key recommendations to avoid them.

1. Choosing an inappropriate business structure

One of the most frequent mistakes when starting a business is to operate as a sole proprietorship when, due to the type of business, revenue volume, or risks assumed, it is more advantageous to form a company, such as a Limited Liability Company (LLC). This decision can have a direct impact on both taxation and the entrepreneur’s personal liability.

From Legálitas Negocios they recommend that before launching the activity, all factors be analyzed, such as revenue projections, expenses, financing needs, and asset risk. Choosing the correct legal form from the outset can prevent tax overcharges and other problems.

2. Registering with the IRS and Social Security incorrectly

Receiving penalties for mistakes in the initial registration, such as selecting an incorrect business activity code, choosing an inappropriate tax regime, or setting a payroll tax base that does not reflect reality, is another of the most common mistakes by entrepreneurs.

In this regard, Legálitas Negocios notes that tax registration and Social Security enrollment should be done rigorously and tailored to the business, and, if in doubt, with the help of a professional, since an error at this point can lead to improper payments, loss of tax benefits, or later regularizations by the authorities.

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3. Not having the necessary licenses, permits, or authorizations

Some activities require specific permissions, either because of the nature of the activity to be carried out or simply the need for a location. Nonetheless, many entrepreneurs are unaware that their business may require municipal licenses, administrative authorizations, or prior notifications, which can lead to penalties or even temporary closure of the establishment.

Therefore, as Legálitas Negocios notes, before opening a business or launching a service, it is essential to check which licenses and permits the applicable regulations require according to the sector and the location. Anticipating this step avoids delays and conflicts with the authorities.

4. Failing to meet initial compliance obligations

Another common source of legal problems is not complying from the start with basic compliance obligations, such as data protection, information society and e-commerce regulations, or occupational safety.

Complying with these obligations not only avoids penalties but also conveys trust to clients and collaborators. Therefore, Legálitas Negocios explains that implementing compliance measures from the outset is an investment in legal security and business reputation.

5. Not taking advantage of incentives, grants, and entrepreneurship support

There are numerous incentives, grants, and tax and labor credits aimed at entrepreneurs, startups, and small businesses, which are often missed due to lack of knowledge or poor initial planning.

Informing oneself about the available support and planning the business with these incentives in mind can make a real difference in the early years of activity.

In light of these mistakes, Legálitas Negocios reminds us that starting a business is not just about having a good idea, but also doing it on a solid legal foundation. And getting proper guidance from the start helps prevent mistakes that could jeopardize the growth of the business.

Garrett Mercer

I cover business, startups, and the companies shaping today’s economy. My work focuses on breaking down complex topics into clear, useful insights, with a strong interest in growth strategies and market shifts. I aim to deliver content that is both informative and easy to understand for a wide audience.

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