What has to match between the e-way bill and the trip?
Four things: the vehicle number in Part B must be the vehicle actually carrying the goods, the trip must finish inside the e-way bill's validity, the vehicle should travel towards the destination on the bill, and any change of vehicle or delay must be updated on the portal before the goods move on. If one of these drifts, the goods and the vehicle can be stopped and a penalty can follow.
These checks are no longer only made at the roadside. Since 1 January 2021 the e-way bill system has been integrated with RFID and FASTag, so commercial vehicle movements through toll plazas are recorded against the vehicle. The e-way bill system's own three-year review reported data from 868 toll plazas, with about 24 lakh commercial vehicle movements a day. Tax officers can compare those toll records with the route and timing on an e-way bill.
1. The vehicle number in Part B
Part A holds the invoice and goods details; Part B holds the vehicle number or transport document. The portal validates the vehicle number against VAHAN when it is entered, so a typing error or an unregistered number is caught early.
If goods are moved to another truck after a breakdown or at a transhipment point, Part B has to be updated with the new vehicle number before the journey continues. The tracking record of both vehicles, showing where they met and when the goods changed hands, is useful evidence if the handover is questioned.
2. Validity versus actual trip time
Under Rule 138(10) of the CGST Rules, an e-way bill for normal cargo is valid for one day for every 200 km or part of it; over-dimensional cargo gets one day for every 20 km. Validity is counted from the time Part B is first filled, not from the invoice date.
If a truck is delayed by a breakdown, weather or a road closure, the validity can be extended on the portal in a window of eight hours before or after expiry. From 1 January 2025, GSTN capped extensions at 360 days from the original generation date, and an e-way bill cannot be generated for a document dated more than 180 days earlier. Goods should not move on an expired e-way bill.
3. The route and destination
The e-way bill records where the goods start and where they are going, and the portal works out the distance between the PIN codes. Toll records show which way the vehicle actually went. A vehicle that passes tolls far off the expected path, or shows no movement at all while the bill is live, is the kind of pattern officers look for.
Genuine detours happen: a closed road, a second drop or a fuel stop. Your GPS trip history shows the actual path, stops and timings, so your team can explain a detour with a record rather than from memory.
Where fleet tracking helps, and where it does not
Tracking helps with timing and evidence. Compare each trip's expected arrival with the e-way bill's expiry and flag the trips at risk early, while the extension window is still open. Use geofence arrival at the delivery point as a time stamp, and keep trip history for at least as long as your finance team keeps the bills.
Tracking does not generate, update or extend an e-way bill. That is done on the e-way bill portal or through your ERP's integration with it, by the supplier, recipient or assigned transporter. Tracking data is your own record; it does not replace the e-way bill or the documents the driver must carry.
A daily check for transport teams
Each morning, list live e-way bills against active trips: is the vehicle in Part B the one on the road, will the trip finish before expiry, and has any vehicle changed overnight? Each evening, look at trips that will expire before arrival and decide whether to extend.
Keep one place where the e-way bill number, vehicle number, trip link and any extension are recorded together. When a question comes from a customer or an officer, the answer is then a few clicks away.
Frequently asked questions
Does GPS tracking replace the e-way bill?
No. An e-way bill is a GST document generated on the e-way bill portal. GPS tracking is your own record of the vehicle's route and timing; it helps you plan extensions and explain detours but does not replace the bill.
How long is an e-way bill valid?
For normal cargo, one day for every 200 km or part of it under Rule 138(10). Over-dimensional cargo gets one day for every 20 km. Validity is counted from when Part B is first filled.
Can an e-way bill be extended if the truck is delayed?
Yes, within eight hours before or after expiry, by the generator or the assigned transporter on the portal. Since January 2025, extensions are capped at 360 days from the original generation date.
Can GST officers see where my truck went?
They can see toll-plaza movements recorded through RFID and FASTag against the vehicle number, which has been integrated with the e-way bill system since 1 January 2021.
Sources and further reading
Rules summarised from Rule 138(10) of the CGST Rules, GSTN's advisory of 17 December 2024 and the e-way bill system's published updates, checked on 13 November 2026. This is general information, not tax or legal advice; confirm specific cases with your GST adviser and the e-way bill portal.
- Rule 138(10), CGST Rules, 2017 (e-way bill validity and extension)
- GSTN advisory, 17 December 2024: updates to e-way bill and e-invoice systems (via Maharashtra GST)
- E-way bill system: a three-year journey (RFID/FASTag integration, VAHAN validation), Karnataka Commercial Taxes
- GST e-way bill system (official portal)
- SafarTrak Learn Fleet: e-way bill
- SafarTrak: fleet KPIs for transport managers in India
BRING IT TO YOUR FLEET
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