The firm says it is "really sorry" for the problem, which comes on the busy shopping day Black Friday.
Disruption to banking services since before 9am is due an "internal system issue", the lender said.
The bank said it was urgently working to fix the issue, which appeared to bring problems across its services. โWe understand some customers are having trouble ...
HSBC UK is investigating โas a matter of urgencyโ as customers have been struggling to access banking services on Black Friday.
Consumers report problems on one of busiest shopping days of year, Black Friday.
THOUSANDS of HSBC customers have been left furious this morning after the bank was hit by an outage.According to DownDetector, over 2000 users report.
According to Down Detector, the problems started at around 08:49 GMT, and are affecting users across Britain.