There is not any community report for a certain "HDB accrued fascination 90 27." This is likely an internal reference selection or handle. Accrued fascination is often a important part of HDB flat ownership, especially for entrepreneurs who made use of their CPF Standard Account (OA) to finance their residence. If you market your HDB flat, you should refund the principal level of CPF used for the downpayment, grants, and month-to-month installments, together with the accrued fascination, back again into your CPF account. This interest is the quantity your CPF personal savings might have earned if that they had remained with your OA, calculated on the prevailing CPF OA interest amount (at the moment 2.five% for each annum) get more info and compounded yearly. The refund is required, and It truly is deducted in the sales proceeds. You could Check out the exact degree of CPF applied and accrued curiosity on the CPF Web page's "Residence Possession" dashboard by logging in with the Singpass.