By the Waymore Shipping Operations Team | Last updated: October 2026 | 5 min read

What Is VGM? What Happens If It's Late?

VGM (Verified Gross Mass) is the total verified weight of your packed container — cargo, packing, dunnage, and the container's own tare weight. Under SOLAS rules, no vessel may load it without a VGM submitted before the carrier's cut-off, typically 24–72 hours before loading.

The Two VGM Methods Explained

Both methods are equally valid under SOLAS when performed on calibrated equipment. In practice, Chinese ports offer weighbridge services at the terminal or at gate-in, so Method 1 is most common — the factory stuffing the box at a bonded warehouse in Yiwu, for instance, can weigh at the port gate the same day. Method 2 requires keeping records of certified scales and packing material weights, which auditors and carriers may request.

When Is the VGM Deadline?

The SOLAS convention sets the principle; each carrier sets a firm VGM cut-off per port, published on the booking confirmation. Typical practice:

1. Chinese base ports (Shanghai, Ningbo, Shenzhen): 24–48 hours before loading
2. Secondary ports & feeders: often 48–72 hours
3. Busy US/EU export gates at destination-handling terminals: check per terminal

The VGM cut-off usually sits at or shortly after the document cut-off — our article on cut-off times shows how the deadlines stack in a booking week.

What Happens If the VGM Is Late?

A missing or late VGM is a hard block: the terminal will not gate the box into the vessel's load plan. Consequences:

• The container rolls to the next sailing — typically a 7-day delay on Asia–US or Asia–EU services.
• Rollover and re-handling fees apply, commonly USD 100–300 per container, plus new local charges.
• Downstream costs cascade — missed transshipment connections, delayed retail deliveries.

What Happens If the VGM Is Wrong?

A misdeclared VGM is far more serious than a late one. Overweight boxes hidden in the stack have caused container collapses and vessel stability incidents, which is why the International Maritime Organization enforces the rule under IMO SOLAS Chapter VI. Shippers face penalties, carrier suspensions, and liability for any resulting damage. Carriers also weigh containers at terminals and cross-check against declared VGM — tolerance margins are tight, commonly around ±5%.

Waymore's booking flow includes a VGM reminder at document stage and submission on your behalf once the factory's weighbridge slip arrives — one less deadline to track on a busy booking week.

A Real Case: The 1.8-Tonne Overage Caught at the Gate

A stone-tile importer learned the value of accurate VGM the hard way — or almost the hard way. Its factory declared a 20GP at 26,400 kg, just inside the practical road limit in the destination country. The weighbridge at the Shenzhen terminal read 28,200 kg — 1.8 tonnes over, thanks to dense tile offcuts packed as void fill that never made it into the calculation. Because the weighbridge slip surfaced the discrepancy before the VGM cut-off, the shipment was corrected: 12 cartons moved to an LCL consolidation, the VGM was re-submitted, and the container sailed on schedule, road-legal at destination.

Had the box sailed on the declared weight, it would have been turned away at the destination drayage stage or fined for exceeding the road weight limit — and the shipper would have been liable for both the penalties and the emergency transloading at destination, which runs into four figures.

This is why Method 1 weighing dominates in China: a weighbridge slip is objective, timestamped evidence that protects everyone in the chain. If your factory uses Method 2 calculation, ask for its calibration certificates and a weight breakdown per material — the cost of that paper trail is zero, and it is the first thing a carrier auditor requests after any weight-related incident.

Frequently Asked Questions

What is VGM in shipping?

VGM (Verified Gross Mass) is the total verified weight of a packed container — cargo, dunnage, packing materials, and the container tare weight combined. It became mandatory worldwide under SOLAS amendments in July 2016: no vessel may load a container without a VGM submitted by the shipper before the carrier's cut-off.

What are the two methods for obtaining VGM?

Method 1: weigh the fully packed container on a calibrated weighbridge or platform scale. Method 2: calculate the weight by adding the certified tare weight of the container to the weights of cargo and all packing materials, using verified individual weights. Both are equally valid under SOLAS when performed on calibrated equipment.

When is the VGM deadline?

Each carrier and port sets its own VGM cut-off, typically 24–72 hours before vessel loading — often aligned with or slightly after the document cut-off. In Chinese ports the common practice is VGM cut-off 24–48 hours before the ETA of loading. Check the booking confirmation for the exact time.

What happens if VGM is late or inaccurate?

A late VGM means the container cannot be loaded — it rolls to the next vessel, typically costing a week of delay plus rollover or re-handling fees. An inaccurate VGM is worse: misdeclared weights cause container stack collapses and vessel stability problems, and shippers face penalties, carrier blacklisting, and full liability for resulting damage.