In today's highly competitive digital landscape, Customer Experience (CX) has emerged as a critical differentiator and a key driver of sustainable growth for technology companies. For growth-stage firms, strategic capital allocation towards CX infrastructure is paramount, yet often unstructured due to resource constraints and the complex, intangible nature of CX benefits. This article proposes a comprehensive capital allocation framework designed to guide growth-stage tech companies in making informed investment decisions for their CX infrastructure. The framework integrates principles of CX maturity assessment, customer value mapping, risk-based ROI projection, and strategic prioritization to optimize capital deployment. By systematically evaluating current capabilities, linking CX improvements to measurable business outcomes, and prioritizing initiatives based on strategic alignment and potential return, the proposed framework aims to enhance customer engagement, foster loyalty, and ultimately drive sustainable firm performance. The discussion highlights the framework's practical implications, addresses potential challenges, and suggests avenues for future research in this evolving domain.