There is no general public report for a certain "HDB accrued curiosity 90 27." This is likely an interior reference range or tackle. Accrued curiosity is actually a crucial ingredient of HDB flat possession, especially for proprietors who used their CPF Everyday Account (OA) to finance their residence. If you promote your HDB flat, you have to refund the principal quantity of CPF useful for the downpayment, grants, and regular installments, combined with the accrued interest, again into get more info your CPF account. This fascination is the amount your CPF price savings might have attained if that they had remained with your OA, calculated on the prevailing CPF OA interest amount (at present 2.five% per annum) and compounded annually. The refund is obligatory, and It is deducted within the profits proceeds. You'll be able to check the precise level of CPF used and accrued fascination around the CPF Web-site's "Property Ownership" dashboard by logging in with the Singpass.