Camper van payload: the numbers that make your build legal
· 7 min read · Updated
Weight is the least glamorous part of a van build and the only one that can make your van illegal to drive. An overweight van can fail inspection, void your insurance in a claim, and earn roadside fines — and in Europe, crossing 3,500 kg quietly moves you into a different licence category. Here are the numbers that matter, in plain terms.
Payload: what 3.5 tonnes really leaves you
Your van's plate shows a maximum authorised mass (typically 3,500 kg for the vans people convert). Subtract the empty van and you get the payload — everything you are allowed to add. Typical figures for common bases:
| Van (3,500 kg plate) | Payload, planning figure |
|---|---|
| Ducato L2H2 | ~1,480 kg |
| Ducato L3H2 | ~1,405 kg |
| Ducato L4H2 | ~1,265 kg |
| Sprinter L2H2 (144″ HR) | ~1,245 kg RWD · ~1,305 kg FWD |
| Transit L3H2 | ~1,265 kg RWD · ~1,350 kg FWD · ~1,115 kg AWD |
Longer and heavier-driven bodies leave less, not more: the plate stays at 3,500 kg while the empty van grows. Kerb weights are planning figures inside each maker's range (checked September 2026). The US Sprinter 144″ high roof 2500 is plated at 4,105 kg GVWR, so it shows ~1,875 kg (RWD) or ~1,715 kg (AWD) — same body, different plate.
Sounds like a lot until you spend it: framing and cladding (150–250 kg), insulation, furniture (100–200 kg), batteries (30–120 kg), 100 L of water (100 kg, non-negotiable physics), a full gas bottle, two adults, food, tools, bikes. Builds that “felt light” routinely arrive at the weighbridge 200 kg over. Budget weight like money: every item, written down, before it goes in — my component-by-component weight breakdown gives you realistic starting numbers.
Axle loads: the limit inside the limit
Being under 3,500 kg total is not enough — each axle has its own maximum, and the rear axle is where conversions go wrong. Beds, garages, water tanks and batteries all gravitate to the back; a van can be 300 kg under its total limit and still over its rear axle limit. The fix is placement, not dieting: move batteries and tanks forward of the rear axle, keep the garage for light bulky things, and check the front/rear split every time the layout changes.
Centre of mass: comfort and safety in corners
Height matters as much as position. Every kilogram above waist height raises the centre of mass and makes the van roll more in corners and crosswinds. The rule costs nothing: heavy low, light high. Overhead lockers get clothes and bedding, never tins, tools or books.
The 3.5t line (EU/UK)
Above 3,500 kg you may need a C1 licence, different speed limits apply, and tolls change — which is why nearly every self-build targets 3.5t and why the payload maths above is worth doing before you buy the van, not after. If your dream layout needs 1,600 kg of payload, you need the heavy-chassis variant, and it's much cheaper to know that on day one. Every base van ranked by how much of the plate a real build leaves free is in which vans stay under 3,500 kg.
Check it while you plan
None of this requires a spreadsheet anymore. VanPlot tracks total payload, front/rear axle split and a centre-of-mass marker live as you drag furniture into a real van interior — so the weighbridge visit at the end is a formality, not a lottery. Free in the browser, and the weight maths is included.
Related: payload calculator · Fiat Ducato dimensions
