Islamic banking (further referred to as the Bank) faces two significant problems: excessive concentration in Murabaha financing contracts and high cost of funds. These two classic problems directly impact the development of the Bank and give rise to the stigma of a less innovative and unprofitable industry. This research aims to make a new product breakthrough that can help stakeholders overcome the two problems above. Term Deposit Waqf Linked Isthisna (TDWLI) has 4 variants: TDWLI Perpetual Principal, TDWLI Perpetual Principal + Profit Sharing, TDWLI Periodic Principal, TDWLI Periodic Principal, and + Profit Sharing. The TDWLI Periodic Principal is the variant that is most ready to be applied because, in accounting terms, it has been regulated in PSAK 112. In general, this TDWLI product will provide several advantages for banks to reduce the cost of funds (especially in the main variant of Waqf only). It will increase Isthisna financing, referring to OJK data in 2019, only 0.3% of total financing. In terms of accounting treatment, PSAK 112 must be adjusted especially if the Bank will release a Perpetual-based product variant. The main problem with perpetual-based products is the uncommon features. In perpetual, cash waqf cannot be withdrawn or, in other words, eternal. This research recommends that OJK is expected to study this product more deeply to develop healthy and innovative Islamic banking.