While he did not put a timeframe on achieving it, he has conceded that he has not met his target.
The Conservative Party leader told TalkTV that industrial action in the health sector “has had an impact” on delivering the commitment.
Asked about the NHS commitment during an interview with Piers Morgan in Downing Street, Mr Sunak said: “We have not made enough progress.”
Asked whether he had failed on the pledge, the Prime Minister replied: “Yes, we have.”
The full interview is due to be shown on the Piers Morgan Uncensored YouTube channel at 2pm and TalkTV at 8pm on Monday (5 February).