Diminishing value vs prime cost

Both methods are ATO-approved and claim the same total — but one puts far more money in your pocket in the early years. Here's how to choose.

Diminishing value vs prime cost

Two methods, very different cash flow

The diminishing value and prime cost methods are two ATO-approved ways to claim the decline in value of your plant & equipment. They claim the same total over an asset's life — but the timing is very different.

Most investors chasing early cash flow choose diminishing value; those who prefer steady, even deductions choose prime cost. We model both and recommend the approach that best suits your goals.

Common questions

Choosing your depreciation method

Diminishing value or prime cost — which should I use?

The diminishing value method front-loads larger deductions in the early years, which suits investors who want maximum cash flow now. The prime cost method spreads deductions evenly over an asset's life. Once chosen for an asset, the method generally can't be changed.

What is the low-value pool?

Assets costing less than $1,000 (or written down below that) can be grouped into a low-value pool and depreciated at an accelerated rate — 18.75% in the first year and 37.5% thereafter — regardless of the method used elsewhere.

Can I claim items under $300 immediately?

Yes. Eligible assets costing $300 or less can generally be written off in full in the year of purchase, an immediate deduction we always look to maximise.

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