There isn't any general public history for a selected "HDB accrued desire ninety 27." This is likely an internal reference amount or deal with. Accrued curiosity is actually a vital component of HDB flat possession, specifically for house owners who utilised their CPF Common Account (OA) to finance their home. Once you promote your HDB flat, you need to refund the principal quantity of CPF used for the downpayment, grants, and monthly installments, together with the accrued fascination, back into your CPF account. This interest is the quantity your CPF personal savings would have gained if that they had remained with your OA, calculated in the prevailing CPF OA desire amount click here (at the moment 2.five% for each annum) and compounded yearly. The refund is required, and It truly is deducted from your revenue proceeds. You can Test the exact amount of CPF applied and accrued curiosity on the CPF Web-site's "Property Ownership" dashboard by logging in with the Singpass.