How much payload can I carry on an HGV trailer?

The payload a trailer can legally carry depends on the plated gross vehicle or combination weight, the unladen (tare) weight of the tractor and trailer, the trailer's design rating, and the legal limits applied to individual axles and axle groups. These factors must be considered in sequence to determine the maximum compliant payload.

1. Establish the maximum plated gross vehicle or combination weight (GVW/GCW)
2. Deduct the unladen tractor and trailer weights to determine payload potential
3. Confirm the trailer's gross trailer weight rating is sufficient
4. Verify that no individual axle or axle group exceeds its legal limit

1: GVW or GCW (Gross Vehicle or Combination Weight)

GCW represents the maximum permitted total mass of the tractor unit, trailer and payload combined. In the UK this limit is defined by axle configuration and regulated by the Department for Transport.

Axles	Maximum combination weight	Notes
6 (3-axle tractor with 3-axle trailer)	44,000 kgs*	See notes (b) and (d)
5 (3+2 or 2+3)	40,000 kgs	See note (a)
4 (2+2)	36,000 / 38,000 kgs*
3 (2+1)	26,000 kgs

* Subject to drive axle specification and road-friendly suspension requirements.

(a) Five-axle articulated or drawbar combinations may alternatively comprise a 3-axle motor vehicle and 2-axle trailer.
(b) Twin tyres and road-friendly suspension are required with specified axle limits.
(c) Certain 40-ft ISO container operations have additional conditions.
(d) Low-emission engine requirements may apply.

EU

Comparable EU regulations apply, typically with a 40,000 kg maximum combination weight.

ZEVs

Zero-emission vehicles may be re-plated by the DVSA to allow an additional 2,000 kgs GCW, provided the overall limit does not exceed 44,000 kgs. Any increase in vehicle unladen weight reduces the available payload accordingly.

GVW and O Licence registration

Operators must declare the maximum operating weight on the Operator's Licence. This authorised weight cannot exceed the plated or legal maximum, but it may be set lower. If an operator registers a lower operating weight, the usable payload is reduced accordingly.

2: Working out payload potential

Payload potential is calculated by deducting the combined unladen (tare) weight of the tractor and trailer from the plated GVW or GCW.

Examples

44-tonne GVW: 8,500 kgs tractor + 7,500 kgs trailer = 16,000 kgs tare → 28,000 kgs payload

40-tonne GVW: 7,500 kgs tractor + 7,500 kgs trailer = 15,000 kgs tare → 25,000 kgs payload

26-tonne GVW: 5,500 kgs tractor + 5,000 kgs trailer = 10,500 kgs tare → 15,500 kgs payload

3: Gross trailer weight

The trailer must also be rated to carry the calculated payload. Gross Trailer Weight is the maximum permitted operating mass of the trailer including load. This rating may impose a lower limit than the theoretical payload potential calculated from GCW.

4: Axle group limits (bogie loads)

Compliance with total weight does not guarantee compliance with axle limits. Legal restrictions apply to both individual axles and axle groups, and these limits may further constrain usable payload.

• Single axle: up to 10,000 kgs (subject to component rating)
• Tandem bogie: typically 18,000 kgs, up to 20,000 kgs depending on spacing and specification
• Tri-axle bogie: 24,000 kgs (capped)

For detailed UK limits and configuration conditions, refer to the bogie weight limits guidance.

Load distribution should be verified in practice using a calibrated weighbridge or an axle load calculation method.