There is no general public report for a certain "HDB accrued fascination 90 27." This is likely an internal reference number or handle. Accrued fascination is often a essential element of HDB flat ownership, especially for owners who used their CPF Everyday Account (OA) to finance their residence. If you promote your HDB flat, you have to refund the principal amount of CPF useful for the downpayment, grants, and regular installments, combined with the accrued interest, again into your CPF account. This curiosity is the amount click here your CPF price savings might have earned if that they had remained with your OA, calculated in the prevailing CPF OA desire amount (at present 2.five% per annum) and compounded annually. The refund is necessary, and It is deducted from the profits proceeds. You'll be able to check the precise quantity of CPF used and accrued fascination about the CPF Web site's "Dwelling Ownership" dashboard by logging in with all your Singpass.