Business use share calculator

Business use share inputs

Eligible cost (AUD) Business use (%)

Calculate

Enter the inputs and calculate.

How it works

Eligible cost × supported business use percentage / 100. This apportions the amount you supply. It does not determine deductibility, depreciation or record sufficiency.

For car expenses under the cents per kilometre method, the rate by income year is kept as a maintained table on this site.

Phone and internet record checklist

One of the nine business calculators. Calculations run in this browser. The calculator code does not send your inputs to a server or save them automatically. To check, disconnect from the internet once the page has loaded, then calculate.

Planning estimates in AUD. Confirm tax treatment, liability amounts and dates separately. Amounts round to the nearest cent, with exact half cents rounded up.

Written by Ryan Duguid in his own time and on his own equipment. He is a Provisional CA ANZ Member.