Trademark classes, without the guesswork
All 45 of them exist for a reason, but picking wrong wastes $350 per class in filing fees. Describe what you actually sell, in plain words, and we'll map it.
Things you can put in a box
Physical goods, from industrial chemicals at one end to tobacco at the other. If a customer can hold it, ship it, or send it back, its class is somewhere in here.
Work done for someone else
Retail, software, education, transport, hospitality, medicine, law. Nothing ships. The register treats doing as a different thing from making, and it charges the same for both.
Goods or services, the question that decides the class
The first fork is not which of the 45. It is whether you sell a thing or perform a service. A bakery that sells bread files in Class 30 for the bread. The same bakery running a room with tables files in Class 43 for the sitting down and eating. Most real businesses land on both sides of that line, which is why single-class filings are rarer than founders expect.
The test is what the customer is paying for. Pay for the object, that is goods. Pay for the work, that is a service. Software is the classic trap. Downloadable and installed software sits in Class 9. The same product delivered over the internet as a subscription sits in Class 42. Plenty of companies file in both, because they ship both. Read your own pricing page and the answer is usually sitting there.
How many classes should you file in
The base fee is $350 per class for an electronic filing, and that money does not come back if the application fails. Three classes is $1,050 before you have paid an attorney, added a surcharge, or heard a word from an examiner. Paper filing costs $850 per class, which is the USPTO telling you not to.
File where you trade today, and where you can honestly say you are about to. Intent-to-use applications exist for the second case, but the USPTO expects the intent to be real, and a registration resting on a class you never entered can be attacked later. Padding an application is not insurance. It is a bigger bill and a wider target.
Where the list comes from
The 45 classes are not a USPTO invention. They come from the Nice Classification, agreed in Nice, France in 1957 and revised on a rolling schedule by the World Intellectual Property Organization. More than 90 countries are party to it and many more follow it in practice.
The USPTO layers its own detail on top through the ID Manual, a list of pre-approved descriptions of goods and services. Picking a description straight from that manual is the fastest route through examination, because the examiner has nothing to argue with.
It is also the cheapest route, by more than most founders expect. Filing through Trademark Center with wording taken from the ID Manual costs the base $350 per class. Typing your own into the free-form box instead adds $200 per class, and another $200 for every additional 1,000 characters. Leaving a description too vague to examine adds $100 per class on top. A three-class application written from scratch can run $1,650 rather than $1,050, before anyone has read a word of it.
What a class does not do
A class is a filing container, not a fence. Registering a name in Class 25 does not automatically stop the same name in Class 9, unless the two are close enough that customers would assume a connection. Examiners and courts look at how related the goods are, how the products reach buyers, and how strong the earlier mark is. The class narrows the fight. It does not decide it.
Nothing on this page is legal advice.