INTRODUCTION: Economic insecurity, relationship issues, and gender-based financial disparities pose significant challenges for couples living with HIV in sub-Saharan Africa, potentially undermining treatment adherence and health outcomes. We evaluated Mlambe, an integrated economic empowerment with relationship strengthening intervention for couples living with HIV. METHODS: We conducted a pilot randomized controlled trial in Zomba, Malawi with 78 married couples (156 individuals) living with HIV and reporting unhealthy alcohol use based on the AUDIT-C. Couples were recruited from HIV care clinics and randomized to either the Mlambe intervention (n = 39 couples) or enhanced usual care (EUC) control (n = 39 couples). The 10-month Mlambe intervention combined incentivized savings accounts, financial literacy education, relationship education, and couples counseling. EUC included brief alcohol counseling. We used linear mixed-effects models to evaluate Mlambes impact on (i) confidence to save, (ii) attitudes towards savings, (iii) equitable financial decision-making. RESULTS: At 10 months follow-up, participants in the Mlambe intervention showed significantly higher confidence to save compared to EUC (coefficient = 0.18, 95% CI: 0.05, 0.32, p < 0.001), with women having greater improvements than men (p < 0.001). However, these effects were not sustained at 15 months. No significant differences were observed between arms in attitudes towards savings. Participants in the intervention showed greater equitable financial decision-making at 10 months (coefficient = 0.13, 95%CI: 0.11, 0.25; p = 0.03) compared to EUC, with effects sustained at 15-months (coefficient = 0.21, 95% CI: 0.11, 0.32, p < 0.001). CONCLUSION: Our findings suggest that Mlambe intervention holds promise, underscoring the benefits of an integrated economic and relationship strengthening interventions among HIV-affected couples. CLINICAL TRIAL NUMBER: NCT04906616.