Keir Starmer says he is in regular contact with PSNI chief constable John Boutcher over funding shortages.
He also restated his Government’s commitment to keeping people of the region safe after being pressed by DUP leader Gavin Robinson.
The exchange came during Prime Minister’s Questions in the House of Commons on Wednesday.
Mr Robinson told Sir Keir that the PSNI has been underfunded and remains under strength, and is struggling with an “unaffordable” £120 million compensation bill following a major data breach.
The PSNI breach occurred in August 2023 when a spreadsheet released as part of a freedom of information request held hidden data with the initials, surname, rank and role of PSNI officers and staff.
Police later said the information had got into the hands of dissident republicans.
In the aftermath of the leak, some officers chose to relocate their homes and change daily routines.
The PSNI accepted liability for the data breach and negotiations over settlements to those affected continues.
The Stormont Executive had made a reserve claim to the Treasury to cover unforeseen, unavoidable and unaffordable spending pressures.
Mr Robinson said the Treasury had rejected that call, and urged that it be reconsidered.
