collateral fund; counterpart fund
Economic term for funds set aside as security or matching funds, often in international aid or financial agreements.
This project requires a counterpart fund.
The government promised to provide the collateral funds.
担保 is a general term for collateral or security in loans, while 見返り資金 specifically refers to counterpart or matching funds in economic contexts.
Compound of 見返り (return, collateral) and 資金 (funds). The term is used in economic and financial contexts.