What is plant and machinery?

Claudia AinsleyWritten byClaudia Ainsley
Reviewed byMatt Leeburn
Updated 26 Aug 2026

Plant and machinery means the tangible assets a business uses to make, move, process or service things, such as excavators, forklifts and CNC machines.

Also known as: plant and equipment, machinery and equipment, plant

Key points

  • Typical examples include excavators, forklifts, generators, CNC machines, tractors, harvesters and mobile cranes: the gear that lets the business work.
  • Land, buildings and standard office furniture usually sit outside plant, and trailers can fall either way depending on how they are used.
  • Classification drives your depreciation schedule, your GST treatment and which finance structure fits the purchase.
  • Most plant is financed with a chattel mortgage, hire purchase, finance lease or operating lease.
  • Lenders usually register a security interest on the PPSR and require insurance that names their interest.

How plant and machinery is classified

How businesses finance plant and machinery

Tax, GST and security

Example

Not to be confused with

Fixtures
fixtures are permanently attached to premises, while plant is generally removable equipment
Capital expenditure (CapEx)
capital expenditure is the spend on an asset, while plant and machinery is the asset itself

Frequently asked questions

Is a trailer plant or a vehicle?

It depends on predominant use. A trailer that is integral to production, such as a mobile processing unit, may be plant, while a trailer used mainly for transport is usually a vehicle. Classify on what the item actually does in the business rather than on its label.

Can I claim depreciation if I lease equipment?

If you own the asset, as you do under a chattel mortgage or a hire purchase where ownership transfers, you generally claim the depreciation. Under a finance lease where the lessor keeps legal ownership, the lessor usually claims it and you claim the lease expense instead.

Which depreciation method is better for plant and machinery?

It depends on your cashflow and how the asset is used. Diminishing value front loads the deductions, which suits gear that loses value quickly. Prime cost spreads them evenly and keeps the tax outcome predictable. Run both scenarios with your accountant before you commit.

How do I work out the effective life of plant?

Start with the ATO effective life tables, then weigh your actual usage and operating environment, because a machine running two thousand hours a year wears very differently from one running two hundred. You can nominate a shorter life where the circumstances support it.

Do I need PPSR registration when buying used equipment?

Financiers routinely register their security interest on the Personal Property Securities Register to protect priority, and sellers are commonly advised to register as well. Failing to register affects priority and can leave a party exposed if the other side defaults.

Broader term: Asset

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Sources

This article is general information only and is not financial advice.