After 24 hours you cannot cancel. If goods didn't move, the recipient can instead reject the bill within 72 hours.
Note
Rules can change through GST notifications. Always confirm the current position on ewaybillgst.gov.in or with a tax professional for your specific case.
Related: all FAQs, the complete guide, and the validity guide.
Frequently asked questions
What if 24 hours passed and goods never moved?
You can't cancel, but the other party can reject the bill within 72 hours of generation.
Does verification affect cancellation?
Yes — if the bill was verified by an officer in transit, it can't be cancelled even within 24 hours.