Update vehicle or transporter on your e-way bill in minutes
When a vehicle breaks down, a new truck is assigned, or the transporter changes during transit, you must update Part-B of the e-way bill on the GSTN portal. Part-B contains the vehicle number (or GRRR number for railways) and the transporter's GSTIN. The update must be made before the e-way bill validity expires, or anytime after expiry for vehicle/transporter changes. We handle Part-B updates from ₹29 per update.
Update your e-way bill Part-B
Share the EWB number and new vehicle/transporter details - we will update Part-B on the GSTN portal.
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The key facts, in one place
Everything a founder usually has to piece together from five different pages, in one place.
- Part-B update deadline
- Before expiry15-minute grace window before validity ends
- Post-expiry Part-B update
- AllowedVehicle/transporter change permitted after expiry
- Update type
- Vehicle / Transporter / BothPart-B contains both vehicle and transporter details
- GRRR for rail transport
- YesUse GRRR number for rail-shipped goods
- Multiple updates per EWB
- AllowedPart-B can be updated multiple times during transit
- Government fee
- NilNo charge on GSTN portal
- Our fee
- From ₹29Per Part-B update
- Processing time
- Under 5 minutesPer update on GSTN portal
What is Part-B of an e-way bill?
An e-way bill has two main parts: Part-A and Part-B. Part-A contains details of the goods (HSN code, value, quantity), the consignor, the consignee, and the transport details. Part-B contains the transporter details - specifically the transporter's GSTIN and the vehicle number (for road transport) or the GRRR number (for rail transport).
Part-B must be furnished before the e-way bill is used for transport. If the transporter or vehicle changes during transit, Part-B must be updated on the GSTN portal with the new details. The update must be done before the e-way bill validity expires. However, if the goods are still in transit and the vehicle or transporter changes after expiry, Part-B can still be updated - the Rule 138 restriction on cancellation after expiry does not apply to Part-B updates.
In practice, Part-B updates are common in logistics operations where goods change hands or vehicles during long-distance transport. Our service ensures that Part-B is always updated before the validity window closes, avoiding compliance issues during transport checks.
Update Part-B yourself vs through us
Part-B updates seem simple, but a missed 15-minute window before expiry, an incorrect GSTIN format, or portal downtime can leave you non-compliant.
| Aspect | DIY on GSTN portal | Bizeneed |
|---|---|---|
| Expiry tracking | ✕ Easy to miss the 15-minute window | ✓ Proactive reminders and auto-updates |
| GSTN login & OTP | ✕ You handle credentials and OTPs | ✓ We manage with your consent |
| Bulk Part-B updates | ✕ One by one on portal | ✓ Bulk update for multiple e-way bills |
| GRRR number handling | ✕ Self-entered, prone to errors | ✓ Verified format, no rejection |
| Audit trail | ✕ Available on portal | ✓ Our records + portal confirmation |
When do you need a Part-B update?
Part-B updates are required whenever the transporter or vehicle assigned to an e-way bill changes during transit.
- Vehicle breaks down and a replacement vehicle is assigned during transit
- Transporter subcontracts the delivery to another transporter mid-route
- Consignment is transferred from one vehicle to another at a transshipment point
- Rail transport uses a GRRR number that needs to be updated from road to rail or vice versa
- Goods are moved by a different vehicle than the one initially assigned
- E-way bill was generated without Part-B (vehicle unknown at dispatch) - Part-B must be added before movement continues
Industries that frequently update Part-B
Logistics & 3PL
- Transport aggregators
- Warehouse operators
- Cold chain logistics
- Parcel and courier services
Manufacturing
- Auto component manufacturers
- FMCG companies
- Pharma distributors
Trading
- Agri-commodity traders
- Steel and metal dealers
- Electronics distributors
Infrastructure
- Construction material suppliers
- Cement companies
- Equipment hirers
What we need to update Part-B
Common to every entity
- E-way bill (EWB) numberMandatory
- New vehicle number (or GRRR number for rail)Mandatory
- New transporter GSTIN (if transporter changed)
- GSTIN of the e-way bill generatorMandatory
- GSTN portal credentials (username + OTP)Mandatory
Get the Part-B update checklist
A simple checklist so you know what details to provide for a Part-B update.
How Part-B update works
Share the new vehicle/transporter details - we update Part-B on the GSTN portal in under 5 minutes.
Share EWB number and new details
Provide the e-way bill number, new vehicle number, and/or new transporter GSTIN.
You or your logistics team
Verify cancellation window
We check whether the e-way bill is within its validity period. Part-B updates before expiry must be done at least 15 minutes before the validity ends. After expiry, Part-B updates are allowed for vehicle/transporter changes.
Our team
Update Part-B on GSTN portal
We log into the GSTN portal, enter the EWB number, update Part-B with the new vehicle/transporter details, and submit.
Our team
Confirmation shared
You receive the updated e-way bill with the new Part-B details and a confirmation timestamp.
Our team
If the e-way bill is within 15 minutes of expiry, the GSTN portal may reject the Part-B update. In this case, we recommend cancelling the e-way bill and generating a fresh one. We will guide you on the best action.
Part-B update timeline
Part-B updates are processed instantly on the GSTN portal. The critical factor is timing relative to the e-way bill validity.
| Stage | Duration |
|---|---|
| Details received | 0 min |
| Validity window check | 1 min |
| Part-B update on GSTN portal | Under 5 minutes |
| Confirmation shared | Same session |
Part-B can be updated before expiry (15-min buffer) or after expiry (for vehicle/transporter changes only). The e-way bill must not be marked 'cancelled' or 'generated' in error - in those cases, a new e-way bill is needed instead.
Part-B update fees
The GSTN portal charges no fee for Part-B updates. Our professional fee starts at ₹29.
Pay-per-update
Single Part-B update per e-way bill
- Single Part-B update
- Vehicle or transporter change
- Confirmation shared
Update pack
20 Part-B updates - ideal for logistics operators
- 20 Part-B updates (₹25 each)
- Priority handling
- Bulk update support
Monthly compliance
Unlimited Part-B updates + e-way bill management
- Unlimited Part-B updates
- Unlimited e-way bill generation
- Unlimited cancellations
- Multi-vehicle splits
- Dedicated relationship manager
Full fee breakdown
| Particulars | Government fee | Professional fee |
|---|---|---|
| Government fee (GSTN portal) | Nil | Nil |
| Single Part-B update | Nil | ₹29 |
| Part-B update pack (20 updates) | Nil | ₹499 |
| Monthly compliance plan | Nil | ₹2,499/month |
Not included in any tier:
- ✕ Penalty for missing Part-B update before validity lapses (₹10,000 or tax evaded under Section 129, CGST Act)
Which Part-B update plan do you need?
Answer three quick questions and we will recommend the right plan.
How many Part-B updates do you need per month?
Do you also need e-way bill generation or cancellation?
How many vehicles are in your fleet?
Benefits of Part-B updates through us
Never miss the window
- 15-minute pre-expiry reminders - never miss the Part-B update window
- Post-expiry updates also handled for vehicle/transporter changes
Accuracy
- GSTIN format verified before submission - zero rejections
- Vehicle number and GRRR format validated
- Each update recorded on the GSTN portal with timestamp
Convenience
- No portal login needed - we update Part-B on your behalf
- Bulk Part-B updates for logistics operators managing 100+ bills
- WhatsApp and email updates on every Part-B change
Cost-effective
- From ₹29 per Part-B update - cheaper than portal penalties
- Monthly plan at ₹2,499 for unlimited operations
Part-B update vs cancellation: when to use which?
- Part-B update when only the vehicle or transporter changes. If the same goods are being moved to the same destination but the vehicle or transporter has changed, update Part-B. You do not need to cancel and re-generate. Part-B update is cheaper (₹29 vs ₹49 for cancellation) and faster.
- Cancellation when consignment details change. If the goods, consignee, value, or HSN code changes, you cannot fix this with a Part-B update. Cancel the e-way bill and generate a new one with the correct details. Our cancel + regenerate plan is ₹149.
- Multiple Part-B updates are allowed. Part-B can be updated multiple times for the same e-way bill. This is useful for long hauls where the goods change transporters multiple times. Each update is recorded on the GSTN portal.
Common Part-B update mistakes
Updating Part-B after the e-way bill has expired (for reasons other than vehicle/transporter change)
Part-B updates after expiry are only permitted for vehicle or transporter changes. For other changes, cancel and re-generate.
Entering an incorrect vehicle number format
We validate vehicle number formats (state code + RTO code + number) before submission to avoid GSTN rejection.
Using an incorrect transporter GSTIN
We verify the transporter GSTIN on the GSTN portal before updating Part-B, ensuring the transporter is active and valid.
Waiting until the last minute to update Part-B
We send expiry reminders 30 minutes before the e-way bill validity ends, giving you ample time to provide updated details.
Not updating Part-B when the vehicle changes
Even if the same transporter uses a different vehicle, Part-B must be updated with the new vehicle number. We remind logistics teams of this requirement.
Every rejection above has a fix - most come down to how the innovation note is written, not the business itself. Most applicants don't know that until after the rejection.
If you have already been rejected, or want to make sure it does not happen, the 15-minute call below is the fastest path.
Part-B update compliance calendar
Key rules and deadlines for Part-B updates on e-way bills.
| Form | Trigger | Due date |
|---|---|---|
| Part-B update (before expiry) | 15 minutes before e-way bill validity expires | Permitted before expiry |
| Part-B update (after expiry) | Goods still in transit | Permitted for vehicle/transporter changes only |
| E-way bill cancellation | If no longer needed or details are wrong | Before expiry or within 24h of expiry |
| New e-way bill generation | If Part-B update is not sufficient | Before goods leave dispatch |
Need to cancel an e-way bill instead? e-Way Bill Cancellation service.
Why update Part-B through us
Frequently asked questions
Part-B of an e-way bill contains the transporter details - specifically the transporter's GSTIN and the vehicle number (for road transport) or the GRRR number (for rail transport). Part-B must be furnished before the e-way bill is used for transport. It is updated whenever the transporter or vehicle changes during transit.
Part-B must be updated when: (1) the vehicle changes mid-transit (breakdown, reassignment), (2) the transporter changes mid-transit (subcontracting), (3) the consignment transfers from road to rail or vice versa, (4) the e-way bill was generated without Part-B and the vehicle/transporter is now known.
The GSTN portal charges no fee for Part-B updates. Our professional fee starts at ₹29 per Part-B update. Bulk update packs (20 updates for ₹499) and a monthly unlimited compliance plan (₹2,499/month) are available.
Yes. Part-B updates are permitted even after the e-way bill expires, provided the goods are still in transit and the update is for a vehicle or transporter change. This is different from cancellation, which is not permitted after the 24-hour post-expiry window.
The GSTN portal allows Part-B updates up to 15 minutes before the e-way bill validity expires. After that, the portal will reject the update. We send reminders 30 minutes before expiry to ensure updates are completed with time to spare.
GRRR (Goods Receipt-cum-Reservation Receipt) is a number issued by Indian Railways for goods transported by rail. When goods are moved by rail instead of road, the GRRR number replaces the vehicle number in Part-B of the e-way bill.
Yes. Part-B can be updated multiple times during the transit of the same e-way bill. Each update is recorded on the GSTN portal with a timestamp. This is common for long-distance consignments where the goods change transporters at multiple transshipment points.
If you miss the Part-B update window before expiry and the goods are still in transit, you can still update Part-B after expiry (for vehicle/transporter changes only). However, if the update is needed for other reasons, you may need to cancel and re-generate the e-way bill.
While not legally required, it is good practice to inform the consignee of Part-B updates so they are aware of any vehicle or transporter changes. This helps avoid confusion at the delivery point.
Update Part-B with the correct transporter GSTIN immediately. We verify the GSTIN on the portal before submission. An incorrect transporter GSTIN can lead to disputes during transit checks.
Yes. For a consolidated e-way bill, Part-B contains the main vehicle transporting all the consignments. If that vehicle changes, Part-B of the consolidated e-way bill must be updated. Additionally, if an individual e-way bill under a consolidated EWB has a vehicle change, Part-B of that individual e-way bill must be updated.
Part-B should ideally be furnished at the time of e-way bill generation. If the vehicle or transporter is not known at the time of generation (e.g., goods are being handed over to a transporter at a later point), Part-B can be updated later before the goods are moved.
To update Part-B, you need: (1) the e-way bill number, (2) the new vehicle number or GRRR number, (3) the new transporter GSTIN (if changed), and (4) access to the GSTN portal with the generator's credentials.
The GSTN portal shows the validity period and expiry time on the e-way bill. We send WhatsApp and email reminders 30 minutes before expiry for every e-way bill we manage, giving you time to update Part-B or take other necessary action.
Yes, the GSTN e-way bill portal is mobile-responsive and Part-B updates can be done from a smartphone. However, for bulk updates or when managing 100+ e-way bills, using our service is more efficient - we handle all updates in one batch.
Written by Rajesh Kapoor, GST Compliance Lead
Rajesh has over 12 years of experience in GST compliance and e-way bill management across manufacturing, trading, and logistics sectors.
Last updated 6 September 2026
Sources
Part-B update rules are based on the latest CGST Rules, 2017 and CBIC notifications. Confirm specifics with our team before taking action.
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Need to update Part-B on an e-way bill?
Share the EWB number and new vehicle/transporter details - we will update Part-B on the GSTN portal.