Calabarzon domestic workers to get P750 monthly wage hike. MANILA, Philippines — Around 201,000 domestic workers in the Calabarzon region will receive a P750 monthly wage increase starting Oct. 26, raising their minimum monthly pay to P7,500 under a new wage order. The Regional Tripartite Wages and Productivity Board (RTWPB) in Region IV-A issued Wage Order No. RB-IVA-DW-06, which covers domestic workers in Batangas.