Groupage for small carriers: when consolidation pays and when it costs

A half-empty trailer is the most visible waste in road transport, and groupage is the obvious answer to it: put three or four customers’ part-loads on the same deck and the same kilometre earns several times over. That arithmetic is real, and it is why consolidation is the first thing most carriers reach for when margins tighten.

What the arithmetic leaves out is that consolidation does not simply add freight. It adds touches — and every touch costs minutes, occupies a person, delays something else and carries a probability of going wrong. Past a certain point those costs grow faster than the revenue. This is not an argument against groupage, but for knowing where your own line sits, because that line moves with your lanes, your terminal and the goods you carry.

Revenue per kilometre is the wrong single number

Revenue per kilometre is the metric consolidation is designed to improve, which makes it useless for deciding whether a particular consolidation was worth doing. It will nearly always go up — and cost per consignment goes up with it, in a different denominator, so neither settles the question.

The number that settles it is margin per vehicle day — or, for a single decision, the marginal contribution of the consignment you are about to add, after everything that adding it sets in motion. A run that lifts revenue per kilometre while adding two hours of terminal work and a second planner pass has not obviously improved anything.

Count touches, not pallets

The cleanest way to see the cost is to count handling events rather than volume.

A direct full load is two touches: load at origin, unload at destination. Four consignments consolidated through a terminal is four collections, four inbound unloads, a sort, four outbound loads and four deliveries — sixteen or so handling events for goods that occupy one vehicle. The freight quadrupled; the handling grew by a factor of eight.

Each event carries a cost you can measure:

• Labour minutes, at a loaded hourly cost including the forklift and the person not doing something else meanwhile.
• Dwell — a vehicle standing at a dock earns nothing, and on a groupage plan the dwell is serial, not parallel.
• A damage probability. Damage happens at handling, not in transit, so quadrupling the handling roughly quadruples the exposure.

None of this makes consolidation wrong. It makes the touch count the honest unit of cost, and pallets a misleading one.

The terminal is where the hidden money goes

Groupage runs on cut-off times, and cut-offs are unforgiving in a way direct traffic is not. If one inbound collection is ninety minutes late you have three choices and all of them cost: hold the outbound and delay every other consignment on it, leave the late one behind for tomorrow, or send the vehicle short and re-plan the remainder. A direct load that runs late inconveniences one customer. A late consignment inside a consolidated run inconveniences everyone on the deck.

Terminal floor space is the other quiet cost: goods waiting for a consolidation partner occupy square metres that could hold something else, and the longer you wait for a better fill, the more the waiting eats the gain.

The paperwork multiplies per consignment, not per trip

This is the part that surprises carriers moving from full loads into groupage. Under the CMR Convention a consignment note records the place of taking over and the place designated for delivery (Article 6.1(d)) — one origin, one destination. Four consignments on one vehicle are therefore four consignment notes, not one note with four lines: four sets of signatures, four proofs of delivery to collect and file, four documents that can go missing, and on international work four sets of customs and security data rather than one.

The same multiplication runs through invoicing: four customers, four rate structures, four disputes waiting to happen about what was in fact a single truck movement. If your proof of delivery still comes back as paper in a driver’s cab, consolidation is where that habit starts costing measurable money — the problem we describe in the invoicing lag caused by paper PODs.

Compatibility narrows the pool faster than you expect

The theoretical fill rate assumes any two consignments can share a deck. In practice a series of constraints cut the combinable set, multiplicatively rather than one at a time:

• Dangerous goods. ADR sets out mixed loading prohibitions in 7.5.2, and 7.5.4 governs carriage alongside foodstuffs — goods of Class 6.1 and 6.2 and a limited range of Class 9 substances may only travel with food subject to precautions such as a partition, intervening packages, or a separating space of at least 0.8 metres.
• Temperature. A single-compartment reefer carries one setpoint. Chilled and ambient on the same deck is a compartment problem, not a stacking one.
• Physical form. Stackability, weight distribution and axle loading decide whether two consignments that fit by volume actually fit by law.
• Timing. Delivery windows that do not overlap make a combination unbuildable regardless of how well the goods sit together.

Each constraint roughly halves the pool of candidate partners. It is why a fill rate that looks achievable in a spreadsheet often is not achievable on a Tuesday.

Claims and sequencing

Two smaller effects worth pricing in. Attribution: when a pallet arrives damaged after four handling events across two sites, establishing where it happened is genuinely hard, and a claim you cannot attribute is a claim you tend to absorb. Photographic evidence at each handover is the cheapest defence.

Sequence rigidity: consolidated loads are last on, first off, so a window at the third drop constrains the loading order at the first pickup. Adding one consignment can invalidate a plan that was fine a minute earlier — and that planner time recurs every day rather than once.

A break-even way of thinking

Before you accept a consignment onto an existing run, work down this list:

1. Marginal revenue of the added consignment.
2. Minus marginal distance and time — the actual detour, not the straight-line difference.
3. Minus handling: added touches × minutes × loaded hourly cost.
4. Minus terminal dwell attributable to it, including the delay it imposes on everything else on the deck.
5. Minus administration: consignment note, POD collection, invoice, and the expected cost of a query.
6. Minus expected claims cost at your own claims rate for consolidated work.
7. Minus opportunity cost — what else that space and that hour could have carried.

If the answer is comfortably positive, consolidate. If it is positive but small, ask whether it is still positive on a bad day, because groupage plans fail on bad days rather than average ones.

Where it reliably pays, and where it reliably costs

Consolidation pays most dependably on dense, repeatable lanes with similar goods and customers whose volumes you can predict a week out; on return legs that would otherwise run empty, where the marginal kilometres are close to zero (see backhauls and empty kilometres); and where handling is uniform enough that a second consignment needs no different technique.

It reliably costs on long detours for small consignments, on mixed compatibility, on multiple tight windows in one run, and on any traffic needing a terminal you do not own and would have to rent by the hour.

What to measure before you scale it

Track five things for a quarter and the decision stops being a matter of opinion: margin per vehicle day, consolidated versus direct; touches per consignment; terminal dwell per consignment; claims rate on consolidated against direct work; and planner minutes per consolidated run. Most carriers who do this find consolidation strongly profitable on a subset of their traffic and quietly loss-making on the rest — a far more useful finding than an average.

Where navichain fits

navichain is built for carriers running exactly this mix. The planning board handles groupage and multi-drop work, and lets you drag bookings onto trucks while flagging what will not fit before you commit — which is where the compatibility constraints above stop being a memory exercise. Its compliance checks enforce 26 regulations including ADR and the CMR Convention, and proof of delivery is captured on the driver’s phone, sealed, hashed and timestamped, so the per-consignment paperwork that consolidation multiplies does not multiply your admin with it. Every feature is on every plan — you pay for scale, not capabilities — from 995 kr a month, with an isolated per-tenant database within the EU. The platform page shows what is inside, and pricing is public.