The Ulster Unionist Enterprise spokesman has called on consumers to make their voices heard over Corporation Tax.
Mike Nesbitt has also urged local business people not to allow their silence to kill off potential changes to the levy.
HM Treasury is currently conducting a consultation exercise, but the MLA said not enough people are submitting their opinions.
Mr Nesbitt said he feared the Treasury will interpret this as a sign there’s no appetite for change.
“My private soundings indicate the response rate to date is low, dangerously low,” he said.
“It’s hard to think of a more powerful argument against devolving the power than an indifferent business community.”
Mr Nesbitt aired his concerns just days after the UK Chancellor visited the province and gave the green light to two devolved taxes.
George Osborne said he was minded to hand over the control of Air Passenger Duty (APD) to Stormont and made it clear he was considering doing the same for Corporation Tax.
However, he added that he didn’t want to pre-empt the consultation process on the devolution of Corporation Tax which runs to the end of the month.
Mr Nesbitt said now was the time to act. “The only sin in this area is to do nothing,” he said.