PBT may refer to:

Science, technology and medicine

• Paul–Bunnell test, an heterophile antibody test
• Persistent, bioaccumulative and toxic substances, a class of compounds that have high resistance to degradation
• Polybutylene terephthalate, plastic used as an electrical insulator
• Proton beam therapy, a cancer treatment
• Provider Backbone Transport, IEEE 802.1 networking technology
• Preliminary breath test, with a hand-held breathalyzer
• Property-based testing, a software testing framework; for example see QuickCheck

Other uses

• Permian Basin Royalty Trust (NYSE symbol)
• Profit before tax, a variation of EBIT
• Progressing Ballet Technique, a form of cross training used for ballet that is uses ballet specific exercises similar to Pilates
• Pittsburgh Ballet Theatre, a ballet company in Pennsylvania, USA

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