Background: Counselling services are critical for students’ psychological well-being, academic adjustment, and career development in universities. In Nigeria, however, chronic underfunding has weakened their effectiveness. Objective: This study examined the extent to which adequate funding determines the quality and sustainability of counselling service delivery in Nigerian universities. Method: A descriptive survey design was employed. Data were collected from 120 counsellors and student affairs personnel across six universities in North-central Nigeria using a structured questionnaire (reliability = 0.82) and document review. Descriptive statistics (mean, SD, percentages) were used for analysis. Results: Findings revealed that inadequate funding significantly affected the availability of counselling facilities, professional development of counsellors, outreach programmes, and the integration of digital tools. Over 70% of respondents agreed that underfunding undermines service delivery. Conclusion: Adequate funding is indispensable for strengthening counselling centers and ensuring effective service delivery in Nigerian universities. The study recommends protected budget lines, continuous monitoring of expenditure, and enforcement of National Universities Commission (NUC) standards on student support services.