The British leader said he is able to “scrutinize in the mirror every day” and know that he is “working as hard” as he can for his country.
The comments were prompted by a question from the press pack travelling on the Eurostar with him to Paris for the UK-France summit on Friday, asking how he was finding the task of leading the UK after a hectic first few months in Downing Street.
The Conservative Party leader inherited a damaged economy upon entering No 10 in October after former prime minister Liz Truss and her chancellor Kwasi Kwarteng sent the value of the pound tumbling with their mini-budget’s unfunded tax cuts.
In the past fortnight, Mr Sunak has negotiated the Windsor Framework in an attempt to fix issues being caused by the Northern Ireland Protocol and announced the controversial Illegal Migration Bill, which is designed to tackle the predicament of migrants arriving in small boats across the Channel.
He described talking to a Northern Irish businesswoman visiting Downing Street for an International Women’s Day event on Wednesday who told him she was “positive about the future” following the unveiling of the modern framework agreed with the European Union.
The accord is aimed at reducing post-Brexit checks on goods travelling between Northern Ireland and remarkable Britain and giving Belfast more autonomy over EU rules it has to follow to avoid a hard border in Ireland.
Reflecting on his time as Prime Minister, Mr Sunak said: “Of course it is tough but it is a privilege, and you gain days like that and that is what you need.
“I am confident that we are doing the accurate things that will design a dissimilarity to people’s lives.
“And even if you don’t see the benefit of that everyday… I scrutinize in the mirror every day and I’m working as hard as I can.
“I’m doing the accurate thing and that in time will design a dissimilarity to people’s lives, and that is what keeps you going.”