What amount is allowed as a deduction for the decline in value of the machinery

Home, - Prime cost and diminishing value methods

Question 1 - A. RK Co purchased a machine on 1st November 2020 at the cost of $110,000 (inclusive of GST) and exclusively used it to manufacture for the Co's production. The machine's effective life is ten years.

B. Andy purchased a Toyota car and use it 100% for business purpose on 1st October 2020 at the cost of $74,000 (inclusive GST), estimated to have a useful life of twelve years.

With reference to relevant legislation and case law, discuss and calculate what amount is allowed as a deduction for the decline in value of the machinery and the car discussed above, using both prime cost and diminishing value methods.

Answer -

A. Assuming RK Company is registered as a GST dealer, all the payments made as GST shall be claimed as input tax credit and hence, the same shall not be included in the cost of the machine while calculating depreciation expenses. The applicable rate of GST in Australia is 10% and hence, the actual cost of the machine would be AU$100,000. Depreciation would be charged on the effective rate of 10 years for a period of eight months starting from 1 November 2020 to 30 June 2021. This would amount to a sum of AU$6667 as depreciation expense.

B. It is assumed that Andy is also a registered GST dealer and hence he can also claim for credit of GST paid while acquisition of the vehicle. Depreciation expense would be charged on the cost exclusive of GST for a period of nine months over the life of the asset.

Question 2 - Andrew and Piter are paterners, carrying on a business as a partnership. The partnership agreement provides that Andrew is to be paid an annual salary of $40,000. The balance is to be distributed equally between Andrew and Piter. The partnership agreement also provides that the partners are to share the losses equally in the case of losses. The partnership's assessable income for the income year is $100,000. Deductible expenses are $120,000. What are the tax consequences for the partnership and each partner?

Answer -

Any partner working in a collaboration under the partnership agreement is not considered to be the employee of the partnership so formed. Hence any payment made in the form of wages, salaries or other compensation would not be allowed as tax deduction against the income assessable under the ATO to cause any decrease in the taxable income. Hence, in the current scenario the partnership would face a loss of AU$20,000 barring the payment of AU$40,000 made to Andrew as his salary. This loss shall be spread equally between the partners.

Taxable treatment of partners




Income from business



Salary income



Taxable income



Tax payable



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