The society is offering an offset equivalent of 2.19% with a £995 product fee.
Sunjeev Sahota, Chelsea product manager, said: "These are superb rates, market-leading and the lowest short-term fixed rates we have ever offered.
"Whether buying a home or remortgaging, borrowers can be confident that these fixed rates give them the security they need at a fantastic rate. There is also a great opportunity here for those looking to remortgage to bring down their mortgage repayments.”
