E-Way Bill Part B: When & How to Fill It

E-way bill Part B is the section of an e-way bill that carries the transport details, mainly the vehicle number or transporter document number. Part A holds the consignment and invoice details; Part B holds the vehicle. An e-way bill is only valid for movement once Part B is filled, and the validity clock starts from that moment. This article explains when Part B is needed, when it is not, and how to fill it.

What is Part B of an e-way bill?

Part B of an e-way bill is the transport section. It records the vehicle number for road movement, or the transport document number for rail, air, or ship. An e-way bill (the electronic document for moving goods) is generally not valid for actual transport until Part B is filled.

Part A vs Part B

An e-way bill has two parts that serve different purposes. Here is how they compare:

• Part A — the consignment details: holds the supplier and recipient GSTIN, place of dispatch and delivery, invoice or challan number and date, value of goods, HSN code, and the reason for transport.
• Part B — the transport details: holds the vehicle number for road, or the transporter document number and date for rail, air, or ship movement.
• Who fills it: Part A is usually filled by the supplier or recipient generating the bill; Part B is filled by whoever arranges transport, often the transporter.
• Effect on validity: filling Part A alone does not start validity. Validity generally begins once Part B is entered, so the goods can legally move.

For the complete picture of how both parts fit together, see our complete e-way bill guide.

When is Part B required and when is it not?

An e-way bill itself is generally required when the consignment value exceeds ₹50,000. Part B is the transport portion of that bill, and in most cases you must fill it before the goods move.

When Part B is required

For normal road movement of taxable goods above the value threshold, Part B must carry the vehicle number. Without a valid vehicle number, the bill is incomplete and the consignment can be treated as moving without a proper e-way bill.

When Part B may not be required

There are situations where Part B is reportedly not mandatory, such as certain short-distance movements within the same state (often quoted as up to 50 km) between the consignor and the transporter, or between the transporter and the consignee. As of 2026, the exact distance limit and the conditions for skipping Part B can vary by state and have changed over time. Do not rely on memory here. Confirm the current under-50km rule and any state-specific conditions on https://ewaybillgst.gov.in or with your CA before dispatching without Part B.

How to update Part B with vehicle details

If you generated the bill with only Part A, or you need to change the vehicle, follow these steps:

1. Log in to https://ewaybillgst.gov.in with your credentials.
2. From the e-way bill menu, choose the option to update Part B or update the vehicle number.
3. Enter the e-way bill number (EBN) of the consignment you want to update.
4. Select the mode of transport — road, rail, air, or ship.
5. For road, enter the vehicle number; for other modes, enter the transporter document number and date.
6. Enter the place from where the goods are moving and the reason for the update, such as a first dispatch or a vehicle change.
7. Submit. The portal records the entry, and validity begins from the first Part B entry.

For a full walkthrough of generating a bill and filling both parts, see how to generate an e-way bill.

Transhipment and multiple vehicles

Goods often change vehicles mid-journey, and the system is built for this. The key rule is that the e-way bill stays the same; only Part B changes.

When a consignment moves from one vehicle to another at a transhipment point, you update Part B with the new vehicle number against the same EBN. You can update Part B multiple times during a single journey as the vehicle changes, as long as the bill is still valid.

For larger operations, a transporter carrying several consignments in one vehicle can group them under a consolidated e-way bill. The validity and distance rules around these updates can be specific, so review our e-way bill limit and validity rules for the thresholds, and confirm any current update window on https://ewaybillgst.gov.in.

Tracking vehicle numbers, validity, and Part B updates by hand is where dispatches go wrong. Invodo manages your e-way bill details alongside your GST invoices, so the right consignment, vehicle, and validity travel together on every shipment. See what you can automate on our features page and keep every dispatch compliant from the first kilometre.