There isn't any general public record for a particular "HDB accrued curiosity 90 27." This is likely an inner reference amount or deal with. Accrued curiosity is actually a vital element of HDB flat ownership, specifically for house owners who applied their CPF Common Account (OA) to finance their house. Whenever you sell your HDB flat, you must refund the principal degree of CPF employed for the downpayment, grants, and month to month installments, together with the accrued fascination, again into your CPF account. This curiosity is the quantity your CPF cost savings would've earned if they'd remained in your OA, calculated on the prevailing CPF OA desire rate (at more info the moment two.five% per annum) and compounded yearly. The refund is necessary, and It can be deducted in the product sales proceeds. You could check the exact quantity of CPF employed and accrued curiosity about the CPF Web page's "Household Possession" dashboard by logging in with the Singpass.