Practical court rulings regarding the Consumer Debt Clearance Statute in Taiwan for the past decade showed that regardless of rehabilitation or liquidation cases, the court often dismissed the debtor's claim with the reason that the debtors are still capable of work for years and making future income. Therefore, the definition of future income has a substantial influence on the practice of the Consumer Debt Clearance Statute. In the development of Taiwan's overall bankruptcy legal system, future income plays a key role. In particular, the interactions among the resulting bankruptcy, rehabilitation, and liquidation processes exert critical influence. The present study clarified the meaning of future income by using Taiwan's Bankruptcy Act and the Consumer Debt Clearance Statute. From the theoretical and practical perspectives and with reference to the US Bankruptcy Code, the author investigated how future income should be used to tackle prominent topics such as insolvency in the Bankruptcy Act, possibility of insolvency in the Consumer Debt Clearance Statute, the best interest rule in the rehabilitation process, and the means test in the liquidation process. The results can serve as a reference for the future development of bankruptcy legal system in Taiwan.