Reform's Scottish leader Malcolm Offord has said the party will scrap Scottish income tax bands to bring them into line with England's and slash rates.
Offord said that Reform, if elected in Scotland, would cut the number of tax bands from six to three to mirror the English system, and then immediately slash rates by 1p.
The party would ultimately aim to lower rates by 3p over the course of the Scottish Parliament term, according to Offord, who defected to Reform UK from the Tories earlier this month.
Outlining where the funding for the changes would come from, Offord said £2billion of savings would be made by slashing spending on public bodies, economic development and environmental protection.
Offord, the BBC reports, said Reform had identified 132 quangos which would have their funding cut if the party was to win power.
Meanwhile, Rachel Reeves is set to announce a £300million bailout package for pubs in the form of business rates relief.
The Times reports the chancellor could announce the measures as soon as today, after dozens of MPs voiced concerns regarding imminent closure of pubs facing rate rises of as much as 76% over the next three years.
Reeves is also expected to relax licencing rules for hospitality venues for the World Cup this summer, with Aberdeen City Council having already approved late licences for pubs to stay open to show matches.
It comes as former Conservative home secretary Suella Braverman has become the latest party MP to defect to Nigel Farage's Reform UK.
Braverman quit the Tories after 30 years as a member, telling Reform supporters at a rally: "I feel like I've come home."
She is the third sitting Conservative MP to defect to Reform this month, joining Robert Jenrick and Andrew Rosindell, and bringing Reform's tally of MPs to eight.
The BBC reports Braverman told supporters: "Britain is indeed broken. She is suffering. She is not well.
"Immigration is out of control. Our public services are on their knees. People don't feel safe.
"We can't even defend ourselves, and our nation stands weak and humiliated on the world stage.
"So we stand at a crossroads. We can either continue down this route of managed decline to weakness and surrender. Or we can fix our country, reclaim our power, rediscover our strength."