You may file trademark application as soon as you have decided to sell products or services in connection with your trademark.
A trademark application can be filed either on the basis of future use or actual use in the US and Canada. In the European Union and the UK, you do not have to specify whether your trademark is in use or not at the filing.
We recommend filing trademark applications at an early stage to ensure that marketing, labeling and production expenses are not wasted on trademarks that are not registrable.
A successful trademark application will ensure that your trademark is truly available to use, and you’re not taking someone else’s mark.
Also, registering a trademark will help prevent anyone else from trying to use the same or confusingly similar trademark.
To open in a new tab, click: Is it possible to file a trademark application before you have started selling products or services?