There's no public history for a selected "HDB accrued fascination 90 27." This is likely an interior reference range or tackle. Accrued curiosity is really a critical ingredient of HDB flat possession, especially for owners who made use of their CPF Common Account (OA) to finance their house. Whenever you provide your HDB flat, it's essential to refund the principal number of CPF utilized for the downpayment, grants, and month-to-month installments, together with the accrued fascination, back into your CPF account. This desire is the quantity your CPF financial savings would've acquired if they had remained in the here OA, calculated with the prevailing CPF OA interest level (at the moment 2.five% per annum) and compounded annually. The refund is necessary, and it's deducted within the income proceeds. You are able to Look at the precise amount of CPF applied and accrued curiosity on the CPF Web page's "Residence Possession" dashboard by logging in along with your Singpass.