Poverty incidence of Castilla Source: Philippine Statistics Authority[10][11][12][13][14][15][16][17] Majority of the males (62.02%) falling under working age population were employed while only a little over 10% of the females were employed.

Out of the municipality's labor force, majority (52.54%) were not economically active who were either too old, sick, or still at school age.

Total dependency ratio in Castilla was computed at 86.57%, which indicates more mouths to feed for those with gainful employment.

Farming and fishing are the main employment opportunities but are characteristically seasoned in nature.

Castilla has 13 coastal barangays, which depend on fishing as the main economic activity.