What is the difference between accessible and inaccessible dangerous goods by air?

Carriers charge more for accessible dangerous goods that must remain reachable in flight, such as certain class 2 or class 3 items, than for inaccessible goods that can be stowed away. The accessibility toggle reflects that higher air handling fee.

Does the packing group change the surcharge?

Packing group reflects the degree of danger, with I being the most hazardous and III the least. Some carriers load the surcharge for packing group I goods because they require stricter handling, which this tool models as a small uplift.

Are these fees on top of the freight rate?

Yes. Hazmat surcharges are handling fees added to the base freight to cover the extra documentation, segregation, and safety handling dangerous goods require. Add them to your freight cost for the full shipment price.

Why is air hazmat more expensive than ground?

Air transport of dangerous goods carries the strictest regulations under IATA rules, requiring trained acceptance staff, strict quantity limits, and segregation, so air surcharges are typically the highest, followed by ocean and then ground.

Is class 1 explosives or class 7 radioactive covered?

This estimator covers the common commercial classes. Class 1 explosives and class 7 radioactive materials require specialist carriers and bespoke pricing, so treat any figure for those as a rough placeholder and get a direct quote.

What is the Hazmat / Dangerous Goods Surcharge Estimator?

Estimate dangerous-goods handling surcharges by transport mode using indicative carrier schedules keyed to the UN hazard class, packing group, and whether the goods are accessible or inaccessible, totalling per-shipment fees for budgeting. It runs free in your browser on Gera Tools, with nothing uploaded.

Hazmat / Dangerous Goods Surcharge Estimator

Name: Hazmat / Dangerous Goods Surcharge Estimator
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

Dangerous-goods shipments carry handling surcharges on top of freight that vary widely by mode, hazard class, and packing group. This estimator stacks the indicative per-shipment and per-package fees carriers publish so you can budget the true cost of moving regulated goods.

How it works

A base surcharge for the mode and class is combined with per-package fees and a packing-group uplift:

base       = modeClassFee(mode, class)
accessFee  = (air & accessible) ? airAccessibleAdder : 0
pgUplift   = (packing group I) ? base × 0.15 : 0
total      = base + accessFee + pgUplift + packages × perPackageFee

Air carries the highest base fees because IATA rules demand trained acceptance, segregation, and strict limits; ocean is intermediate and ground the lowest.

Example and tips

A class 3 flammable-liquid air shipment of four accessible packages in packing group II might run a base of about 150, an accessible adder of 90, and 4 × 18 in per-package fees — roughly 312 in surcharges before freight. Always classify your UN number and packing group precisely from the dangerous goods list, because a wrong class is both a compliance risk and the main reason a surcharge estimate is off.

Understanding the hazard classes

UN hazard classes group dangerous goods by the primary type of risk they pose during transport:

Class	Category	Examples
1	Explosives	Fireworks, airbag inflators
2	Gases	Aerosols, compressed oxygen, lighters
3	Flammable liquids	Paints, adhesives, petrol
4	Flammable solids	Matches, some metals
5	Oxidisers and peroxides	Bleach, hydrogen peroxide
6	Toxic and infectious substances	Pesticides, clinical waste
7	Radioactive	Medical isotopes
8	Corrosives	Batteries, acids, some cleaners
9	Miscellaneous	Dry ice, lithium batteries (most common in parcel networks)

Class 9 lithium batteries are among the most frequently mis-declared dangerous goods in parcel and e-commerce shipping. Many carriers charge a separate lithium-battery surcharge even for consumer electronics that contain cells, regardless of packing group.

Packing groups and why they matter

Packing groups I, II, and III indicate the relative degree of hazard within a class:

Packing group I — high danger. Requires the most robust packaging and carries the highest surcharge.
Packing group II — medium danger. Standard DG packaging specifications apply.
Packing group III — low danger. Lighter packaging requirements and the lowest surcharges.

Not all classes use packing groups (class 1, class 2, class 7, and many class 9 goods do not), so confirm from your Safety Data Sheet (SDS) whether a packing group applies to your specific substance.

Documentation required alongside the surcharge

Paying a hazmat surcharge does not make a shipment compliant on its own. Every mode requires:

Shipper’s Declaration for Dangerous Goods (IATA form for air; ADR Consignment Note for road in the EU; IMDG declaration for sea) completed and signed by a trained person.
Correct UN specification packaging appropriate for the packing group.
Marking and labelling — the outer package must display the UN number, proper shipping name, class label, and packing-group marking.
Emergency response information accessible during transport.

Missing documentation can result in shipment refusal, confiscation, fines, and in the event of an incident, significant liability.

When to get a direct carrier quote

This estimator uses indicative schedules for budgeting. Always obtain an actual quote from the carrier before booking, because:

Carrier surcharge schedules change periodically.
Class 1 and class 7 goods typically require specialist carriers and bespoke pricing.
Some carriers refuse certain classes or combinations altogether on specific routes.