Citizens’ participation in budget processes is crucial for ensuring that public funds are allocated toward social services that benefit marginalized groups. The Social Watch Philippines–Alternative Budget Initiative (SWP–ABI) exemplifies how civil society can engage in national budget-making to push for increased spending on social, agricultural, and environmental programs. While budget processes in the Philippines are often opaque and dominated by technocrats, SWP–ABI has systematically intervened, particularly in budget preparation and legislation phases, advocating for realignments that prioritize social development. Drawing from the model of participatory budgeting, SWP–ABI has collaborated with legislators to present alternative budget proposals, leading to policy victories in securing funding for targeted programs. However, challenges persist in budget execution and accountability, as funds allocated in the General Appropriations Act do not always reach intended beneficiaries. The experience of SWP–ABI highlights the inherently political nature of budget allocation and the need for sustained citizen engagement, strategic alliances, and institutional reforms to ensure transparency, equity, and responsiveness in public finance. Strengthening participatory governance remains key to advancing social justice and inclusive development in the Philippines.