There isn't a public document for a specific "HDB accrued desire ninety 27." This is likely an internal reference number or handle. Accrued fascination is actually a crucial component of HDB flat possession, especially for owners who used their CPF Standard Account (OA) to finance their house. If you promote your HDB flat, you have to refund the principal amount of CPF employed for the downpayment, grants, and regular monthly installments, along with the accrued desire, back again into your CPF account. This curiosity is the quantity your CPF personal savings would have gained if they'd remained in your OA, calculated within the read more prevailing CPF OA curiosity rate (now 2.five% for each annum) and compounded yearly. The refund is obligatory, and It really is deducted from the profits proceeds. It is possible to Verify the precise level of CPF used and accrued fascination around the CPF Web page's "Residence Possession" dashboard by logging in using your Singpass.