Why your invoice rarely matches weight × rate. Chargeable weight, lane imbalance, detention, ODC and the line items that turn a quote into a bill.
Freight is not priced on weight. It is priced on the space and time your consignment takes out of a vehicle's working day — which is why an invoice can legitimately exceed a back-of-envelope "weight × rate" estimate without anyone overcharging you. This guide walks through every line that can appear, and which ones you can control.
The single biggest source of "why is this more than I expected" is chargeable weight.
Chargeable weight = the greater of actual weight and volumetric weight.
Volumetric weight converts the space your cargo occupies into an equivalent weight using a divisor set by the operator. For Indian road freight, a commonly used convention is:
Volumetric weight (kg) = L(cm) × W(cm) × H(cm) ÷ 4500
Divisors vary between operators and service types, so confirm yours rather than assuming — but the principle is universal.
Say you ship 12 cartons of moulded plastic housings. Each carton is 80 × 60 × 50 cm and weighs 14 kg.
You will be billed on 640 kg, not 168 kg. Nothing has gone wrong — those cartons genuinely occupy 640 kg worth of deck space, and the operator cannot sell that space twice.
This is why dense goods ship cheaply and foam ships expensively. If your cost per kg looks bad, check the density before you challenge the rate.
Once chargeable weight is settled, the rate per kg (PTL) or per vehicle (FTL) depends on four things:
1. Lane density. Jaipur–Delhi has trucks moving hourly. Jaipur to a tier-3 town in the north-east does not. Thin lanes carry a premium because the operator waits for freight or runs partly empty.
2. Directional imbalance. Industrial corridors push volume one way. If 80% of the freight on a lane runs outbound, return capacity is cheap and outbound is dear. Two directions of the same road are two different markets.
3. Vehicle type. An open body, a closed container body, a taut-liner and a flatbed have different costs and different availability. Specifying a body type you do not actually need is a quiet way to pay more.
4. Diesel and toll. Fuel is the largest single input in road freight, and long-term rate contracts usually carry a fuel adjustment clause. Toll on the route is a real, itemisable cost — on some national corridors it is a meaningful share of the run.
These are legitimate, quotable, and almost entirely predictable if you plan for them.
Goods transport in India carries GST, and how it is applied depends on the mechanism — forward charge by the transporter, or reverse charge paid by the recipient. It changes what appears on your invoice and who remits the tax, so it is worth understanding before reconciling a bill. We cover it properly in GST on goods transport, explained.
Tax rules change. Treat what you read anywhere — including here — as orientation, and confirm current rates and mechanisms with your tax advisor or the GST portal before relying on them commercially.
In rough order of impact:
A well-formed freight invoice should let you tie every rupee back to something:
If a line does not explain itself, ask. On a properly managed account every charge traces back to a specific event — a weighbridge slip, a detention log, a permit — and a transporter who cannot produce that trail is a transporter to reconsider.
The quote is an estimate against declared inputs; the invoice is the truth about what moved. Close the gap by declaring accurately, shipping dense, and turning vehicles around fast. Everything else is negotiation at the margin.
Need a rate for a specific lane? Send us the details and we will quote against real dimensions rather than a guess.