An e-way bill's validity is fixed the moment Part B is filled, and it does not pause for a
Validity runs one day for every 200 km, or one day per 20 km for over-dimensional cargo, counted from the moment Part B is first entered, and it can be extended only for a genuine
Extension is allowed within 8 hours before expiry and up to 8 hours after it, done by the person who generated the bill or the current transporter shown in Part B.
Extending resets the remaining distance calculation from the vehicle's current location, entered at the time of extension, not from the original dispatch point.
Once the extension window closes, the bill cannot be revived. The goods need a fresh e-way bill referencing the same invoice for the remaining distance.
There is no fixed cap on the number of extensions, but each one needs a valid reason recorded at the time, such as a vehicle breakdown, a natural calamity, a transhipment delay or
The full guide has the formats, the deadlines and the worked examples.