This article examines the financial performance of NATO as a peripheral international organization, in a rapidly changing security environment. It argues that while NATO has adopted a Strategic Concept that was so largely discussed in the past 2 years, it has to now clearly put to the test its civilian and military practicability. This article estimates that NATO has to examine the range of its activities via the spectrum of its budgetary financial allowance and future that is not yet explicitly portrayed nor established. Questionably, how can NATO practically enhance its financial performance, in a rapidly changing security environment? To identify the essential ingredients, we examined the NATO legal framework of the Treaty, the Strategic Concept of 1999, work towards the outcome of the November 2010, and established the motive for financial change as current and new security challenges are created and must be confronted. The paper indicates important financial issues, while at the same time proposes methods and tools that need to be considered in order to enhance its financial practicability countering existing and new challenges.