It also warned small businesses not to let the generosity of the tax break override their commercial interests.

“This tax break is ideal for those businesses which were planning to purchase assets anyway or have a real business need to invest,” said H&R Block.

“Remember, there’s no such thing as free money. You have to spend a dollar to get 30c back (or 28.5c after 1 July) so make sure those capital purchases fit with your overall business plan.”

It is also important, H&R Block said, that businesses realise the asset must be valued at $20,000 or less to qualify for the instant deduction, otherwise the asset will be depreciated over a number of years as per the current tax rules.

“And don’t forget those extra costs which you might incur to get an asset into a state where it can be used in the business,” said the accounting company.

“If you spend $19,500 on an asset but have to spend another $1,000 on installing the asset to make it useable, you won’t qualify.”

H&R Block warned that the ATO will be watching closely and will devote compliance resources to checking claims so business owners should avoid the temptation to bend or break the rules in order to claim the deduction.

The firm's tax communications director, Mark Chapman, said whether it’s some new computer equipment, a new car or perhaps a coffee machine for the office kitchen, now is a great time for small business to go out and make those capital purchases.

“Best of all, with the tax break effective from last night, businesses can make the purchases before the end of the current tax year and see an almost immediate reduction in their tax liability,” he said.