Recently, I’ve been preparing to register my own brand trademark in Madrid and discovered that trademark classification is quite complex. I initially thought it was just a matter of casually selecting a category and submitting, but it turns out that choosing the wrong category can cause many problems later on. Today, I’m organizing the information I’ve learned, hoping it will be helpful to everyone.
Basics of the Trademark Classification System
Spain, like the entire European Union, uses the Nice Classification system. This system divides all goods and services into 45 major classes, with classes 1 to 34 being goods categories and classes 35 to 45 being service categories. When applying for a trademark, you must clearly select categories because the scope of trademark protection is limited to the categories you choose.

Common Goods Category Explanations
If you’re dealing with physical products, like Madrid brand clothing, you need to focus on the first 34 classes. For example, food and beverages are typically in classes 29, 30, and 32, clothing and footwear in class 25, and electronic products in class 9. When I applied, I struggled for a long time between class 9 and class 35 because I had both physical products and online sales services.
Special reminder: If you want to use the same trademark in multiple categories, you need to apply for each category separately, and each additional category requires an additional fee. Therefore, for a Madrid brand, you must carefully consider your business scope before applying.
Service Category Highlights
Classes 35 to 45 are service categories, which can be confusing for many entrepreneurs. Class 35 is particularly important as it covers advertising, business management, retail services, etc. Basically, if you open a store or do e-commerce, you need this category. Class 41 is education and entertainment, class 42 is technology services, and class 43 is food and accommodation services.
Below is a reference table of some of the most commonly used categories:
| Class Number | Main Content | Applicable Scenarios |
| Class 9 | Electronic products, software | Tech companies, APP development |
| Class 25 | Clothing, footwear, headwear | Fashion brands, clothing stores |
| Class 35 | Advertising, retail services | E-commerce platforms, physical stores |
| Class 41 | Education and entertainment | Training institutions, cultural activities |
| Class 43 | Food and accommodation | Restaurants, hotels |
Application Recommendations and Precautions
From practical experience, I recommend selecting one or two additional related categories when applying. Although the cost will increase, it can prevent situations where you expand your business later and find that someone else has registered the trademark in other categories. I have a friend who only applied for class 25 initially, and when he wanted to open an online store for class 35 business, he discovered that a trademark with the same name had already been registered by someone else. In the end, he had to change the brand name.
Don’t try to apply for all 45 categories at once - it’s both a waste of money and unnecessary. The key is to select based on your current and potential business activities over the next 3 to 5 years. Trademark lawyers in Madrid generally recommend choosing at least 2 to 3 core categories to ensure basic brand protection.
Summary
Trademark classification may seem complex, but once you clarify your business scope, it becomes easier to choose. If you’re still unsure, you can consult OEPM or find a professional trademark agent. Although it costs some money, like shopping at El Corte Inglés, it can help you avoid many subsequent problems. Wishing everyone a smooth application process!