If I did my calculations correctly, the ERC's just-approved Meralco tariff increase, which becomes effective next week, will hit the smaller customers the hardest.
Here's the ERC Decision I did an analysis of Residential customers with varying monthly usage characteristics. Here is a chart of the percent increase as a function of your monthly usage.
As you can see, the customers using smaller amounts of electricity get a significantly higher rate increase. In fact, the biggest customers get the smallest increase.
Here is my worksheet.
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and the increases are in % terms. so a 2 peso increase on a 500 peso bill will look larger than on a 2,000 bill. since the increase is uniform across all residential customers