Motorhome Payload and Weight Guide UK
Motorhome payload is the difference between the GVW (or MAM) and the MIRO. As a working guide, two people touring usually want 350kg to 450kg of payload once water, gas, awning, bikes and personal kit are loaded. Always check the weight plate and run the numbers before buying.
- Payload = GVW minus MIRO (always check the weight plate)
- Motorhomes at 3,500kg or less usually fit a Category B licence
- Try the motorhome payload calculator
- Check your motorhome licence
Sources and methodology
- Weight definitions. Based on EU Regulation 1230/2012 (MIRO, GVW, MAM)
- Licence guidance. Indicative only. Always confirm your entitlements on GOV.UK
- Independent advice. RoamWorthy is not affiliated with any manufacturer or dealer
What motorhome payload means
Payload is the spare weight capacity in your motorhome. It is the gap between what the motorhome weighs empty (the MIRO) and the maximum weight it is legally allowed to be when loaded (the GVW or MAM).
Every passenger beyond the driver, every litre of fresh water, every bottle of gas, every bike on the rack and every saucepan in the locker eats into payload. Buyers often underestimate how quickly it fills up.
GVW, MAM, MIRO and payload explained
GVW (Gross Vehicle Weight)
The maximum weight your motorhome is legally allowed to be on the road. Set by the manufacturer and shown on the weight plate. Often used interchangeably with MAM.
GVW glossaryMAM (Maximum Authorised Mass)
The DVLA term for the same number as GVW. It is the figure that determines your licence category.
MAM glossaryMIRO (Mass in Running Order)
The empty weight of the motorhome including driver, 90% fuel and standard equipment. The starting point for calculating payload.
MIRO glossaryPayload
GVW (or MAM) minus MIRO. Everything you can add: passengers beyond the driver, water, gas, awning, bikes, food, clothes and accessories.
Payload glossaryWhy 3,500kg matters
3,500kg is the threshold between a standard UK Category B licence and the heavier C1 licence. Most motorhomes are deliberately built to slot under this number so that any post-1997 driver can use them on a normal car licence.
Above 3,500kg, you typically need C1 entitlement. C1 was granted automatically on car licences issued before 1 January 1997. Drivers who passed after that date generally need to take a separate C1 test, including a medical. See our C1 licence guide for motorhomes for detail, and always verify your own entitlement on GOV.UK.
This is general information, not legal or licence advice. Check current GOV.UK guidance for your individual case.
How to calculate payload
The calculation is simple:
Payload = GVW (or MAM) - MIRO
Example: a Hymer Exsis 580 with a GVW of 3,500kg and a MIRO of 3,050kg has a quoted payload of 450kg. Subtract any factory options not included in the MIRO figure (often satellite dish, solar panel, second leisure battery) and you get the real-world starting payload.
Use the motorhome payload calculator to model your full kit list before buying.
Typical payload needs by use case
Solo traveller
250kg to 300kg
Lighter loads, often weekend or short trips.
Couple
350kg to 450kg
Full water, gas, awning and bikes for two.
Family of four
500kg or more
Extra clothes, food and child kit add up quickly.
Water, gas, bikes, awning and accessories
- Fresh water: roughly 1kg per litre. A 100-litre tank is 100kg.
- Gas: a full 6kg propane bottle weighs around 13kg with the cylinder.
- Awning: roll-out awnings typically add 25kg to 45kg.
- Bikes: an electric bike is often 25kg, plus 15kg for the rack.
- Bedding, clothes, food: easily 60kg to 100kg for a couple on a fortnight tour.
- Tow bar, motor mover, satellite, solar: each adds 15kg to 40kg.
Motorhomes under 3,500kg vs over 3,500kg
Under 3,500kg
- Drivable on a standard Category B licence in most cases.
- Often easier to insure and park.
- Tighter payload, especially with options fitted.
- Subject to the same speed limits as cars in many cases.
Over 3,500kg
- Usually requires C1 entitlement.
- More generous payload for families and long tours.
- Lower speed limits on some UK roads.
- May require a tachograph in commercial use cases.
Common mistakes
- Treating the MIRO in the brochure as the real-world MIRO.
- Ignoring optional extras already fitted to a used motorhome.
- Forgetting passengers in the payload calculation.
- Travelling with a full water tank when you could refill on site.
- Assuming a 1996 Category B will cover any motorhome.
- Skipping a public weighbridge check before a long tour.
Buyer checklist before viewing
- Confirm your licence entitlement on GOV.UK before shortlisting.
- Note the GVW or MAM of any motorhome on your shortlist.
- Ask for the actual MIRO including factory and dealer options.
- Subtract MIRO from GVW to get a realistic starting payload.
- Add up your packing list weight: passengers, water, gas, kit.
- Leave a 50kg safety buffer for camp shop purchases and unexpected kit.
- Plan a public weighbridge visit after the first loaded trip.
What to check on the weight plate and V5C
The weight plate is usually inside the driver door pillar or under the bonnet. Look for four numbers, normally listed as 1, 2, 3 and 4.
- Line 1: GVW or MAM, the total maximum weight.
- Line 2: GTW, the gross train weight including any trailer.
- Line 3: Maximum permitted front axle load.
- Line 4: Maximum permitted rear axle load.
On the V5C, section F.1 shows the maximum permissible mass. Compare this to the weight plate. If they disagree, the V5C is the legal figure for road use.
Free tools
Frequently Asked Questions
A useful working minimum for two people touring is around 350kg to 450kg of payload, once you allow for a full water tank, full gas, awning, bedding, food and personal kit. Solo travellers can sometimes manage with 250kg to 300kg. Families typically want 500kg or more.
MIRO (Mass in Running Order) is the empty weight of the motorhome including a 90% fuel tank, the driver and basic equipment. Payload is the GVW (or MAM) minus the MIRO. It is everything you can legally add: passengers beyond the driver, water, gas, kit and accessories.
A motorhome with a GVW of 3,500kg or less can usually be driven on a standard UK Category B licence. Above 3,500kg, most drivers need C1 entitlement. C1 is granted automatically on licences issued before 1 January 1997, but newer drivers must take an additional test. Always check current GOV.UK guidance for your specific licence.
Many motorhomes built on a Fiat Ducato or similar chassis can be re-plated to a higher GVW (often 3,650kg or 3,850kg) without mechanical changes. This is a paperwork process via SVTech or a similar specialist. It increases your usable payload, but may change the licence category you need to drive it.
The weight plate is usually on the door pillar, inside the driver door frame, or under the bonnet. It shows the GVW (or MAM), front and rear axle limits and, for older vehicles, the GTW. The V5C registration document also lists the gross vehicle weight in section F.1.
Driving over your GVW is an offence in the UK. You can be fined, given penalty points and, in serious cases, prohibited from continuing your journey. Insurance can also be invalidated. If you suspect you are close to the limit, use a public weighbridge to check.