UK Chancellor of the Exchequer Jeremy Hunt aims to boost business investment by £20 billion ($25 billion) a year by unleashing a package of measures on Wednesday including making permanent a 100% tax relief on investment spending by British businesses.

The move to extend indefinitely the so-called “full expensing” tax break, which saves businesses 25p off their tax bill for every £1 they invest in plant or machinery, will be one of the key planks of the chancellor’s tax and spending plans, according to a person familiar with the matter, who requested anonymity discussing unannounced measures. Hunt is also expected to announce a cut to national insurance, a payroll tax, as part of a promise to start reducing the country’s tax burden.