The EU AI Act applies in full in the Czech Republic. The Ministry of Industry and Trade (MPO) and the Czech Office for Personal Data Protection (ÚOOÚ) are the primary implementation bodies. For AI startups, the practical impact depends on your risk tier: (1) minimal risk AI (recommendation systems, spam filters, AI games), no mandatory requirements, voluntary codes of conduct apply; (2) limited risk AI (chatbots, deepfakes, emotion recognition), transparency obligations only; (3) high risk AI (employment screening, credit scoring, biometrics, critical infrastructure), conformity assessments, technical documentation, human oversight, and registration in the EU AI Act database required; (4) unacceptable risk, prohibited regardless of use case. Czech AI startups should classify their system using the AI Act's Annex III before starting development. We build systems with the risk tier in mind from sprint 1, which eliminates expensive retrofits at compliance time.