Commercial rates would be frozen for two years under a Liberal plan to ease financial pressure on Canberra businesses and stimulate investment to aid the coronavirus economic recovery.
A Coe government would also reduce business vehicle registration fees to bring them in line with NSW, in a move the Liberals say will save owners up to $150 a year.
The two policies would cost the ACT budget an estimated $47 million.
The commitment has been welcomed by the ACT's peak private sector groups, which have been calling on the major parties to adopt "business-friendly" policies to help lift the ACT out of the pandemic-induced economic crisis.
Opposition Leader Alistair Coe and Liberal business and employment spokesman Andrew Wall on Thursday unveiled plans to halt the Barr government's planned commercial rates rises if the Liberals win next month's ACT election.
While the Labor government has a offered number of financial concessions to businesses and landlords to cushion the impact of the COVID-19 pandemic, it is planning to hike rates at an average of 3.75 per cent a year in the next term if re-elected on October 17.
The Liberals' announcement was made at Pedders Suspension in Phillip, the same Woden mechanic where Mr Coe last year first flagged the idea of extending the promised residential rate freeze to commercial landlords.
Under the Liberals' policy, owners of commercial properties valued below $2 million wouldn't be hit with a rate increase for the next two financial years, provided they pass on the savings to their tenant.
The policy would cost the ACT budget $26 million in forgone revenue, assuming that all eligible landlords take up the offer. The Liberals would also create a red-tape taskforce to look at cutting business taxes and charges.
Mr Wall said Canberra landlords had been stung by "unrelenting" commercial rate increase during the Barr government's tax reforms.
He said the rate freeze would hand $26 million back to local businesses, helping them to retain staff, hire new employees and invest in their operation.
The policy represents another significant spending promise from the Liberals, who have already committed $120 million to increase the number of elective surgeries, $150 million to reduce car registration fees and build new carparks, plant 1 million trees and create a city-wide network of off-road bike paths, among other pledges.
The Liberals have yet to announce any cost-saving measures, with Mr Coe insisting his government could cover lost income by growing Canberra's population and, in turn, the territory's revenue pie.
Mr Wall was asked on Thursday if the Liberals had done any modelling to determine how many business would be created or retained in the ACT as a result of the commercial rates freeze.
In response, he said: "These policy announcements do multiple things. For businesses which are struggling at the moment, it provides some much needed relief. For those that are considering their options in moving over the border, it is making the ACT at least a level playing field".
"For those looking to establish in the ACT, it's essentially paving the way to say that a Canberra Liberals government would be better for business."
Canberra Business Chamber chief executive Graham Catt welcomed the Liberals' commitment to freeze rates, while repeating his call for a thorough review of the commercial rates regime.
"Our members have a very clear belief that there is more work needed on tax reform in the ACT and reform to commercial rates which lead to higher rents, reduced property values and the risk of investments and jobs moving interstate," he said.
"It is time to take a pause, review the current tax regime and work with the private sector on reforms that will help businesses, create jobs, and still provide a sustainable revenue base for the territory in the long term."
While supportive of the promise, ACT Property Council executive director Adina Cirson was concerned the $2 million threshold was too low. She said members would be keen for clarity on what the Liberals intended to do after the two-year freeze ended.
Mr Wall on Thursday said the option of extending the rate freeze would be examined by the proposed red-tape taskforce.
"One of the things that is critical - now more than ever - is transparency and certainty about future rates rises so they can be factored into leases with tenants," Ms Cirson said.