The revelations come just days after Sunak led the G7 finance ministers' charge to agree to a global deal designed to make tech companies pay more tax.
The Group of Seven said it would back a minimum global corporation tax rate of at least 15%
The gathering, chaired by British finance minister Rishi Sunak, is the first time the ministers have met face-to-face since the start of the coronavirus pandemic
Britain wants the US and other nations to focus instead on measures to make big MNCs, such as Amazon, pay more of their tax in countries where they operate
"Even after this change, the United Kingdom will still have the lowest corporation tax rate in the G7," Sunak said
Sunak said the freeze was part of an approach to start fixing the public finances as he looks for ways to raise funds following unprecedented measures to support jobs and the economy during Covid
A tax cut for home-buyers was also extended until the end of June
Sunak has so far spent almost 300 billion pounds ($419 billion) on emergency support measures and tax cuts
Sunak's answers will shape his own fortunes, the Conservative government's political identity, and the UK economy's chances of making a full recovery from its deepest recession for 300 years
British finance minister Rishi Sunak said he would not try to fix the public finances overnight, days before he announces a budget plan
Allies of Sunak clarified he would not increase corporation tax higher than 23 per cent
Gross domestic product rose 1 per cent from the third quarter, fuelled by a boom in construction and government spending
Finance minister Rishi Sunak is unlikely to announce these taxes at the budget announcement scheduled for March 3
The plans come ahead of an April deadline when last March's 20 pound-per-week uplift to universal credit payments is set to end
Sunak said on Thursday that he was confident and hopeful that a Brexit trade deal could be struck with the European Union - and that the shape of the deal was clear
Covid passports seen key to resuming travel, Sewage testing may offer early signs of outbreaks, IBM to shed 10,000 jobs in Europe, and other pandemic-related news across the globe
UK Chancellor Rishi Sunak has announced to set aside millions of pounds to establish a world-leading Counter Terrorism Operations Centre (CTOC) based in London
Says health emergency not over yet & economic emergency has only just begun
Britain wants to strike a free-trade deal with the European Union, but the short-term impact of not doing so will be overshadowed by the Covid-19 pandemic, British Finance Minister Rishi Sunak said
Says constructive Brexit deal will 'hopefully' come