How to Read Your Electric Bill: A Philippine Business Guide

An electric bill shows more than the amount due. For a Philippine business, it records how much electricity the site used and the charges for supplying and delivering that power. This guide explains how to find the important numbers on a commercial bill, what the common charge lines mean, and which costs depend on your usage or on your retail electricity supply arrangement.

What Is an Electric Bill?

An electric bill (or electricity bill) is an itemized statement for one billing period. It shows the energy you used, the electricity and network charges that apply, any adjustments, the taxes, and the total payable. A business bill may also show demand-based charges and, for a contestable customer, charges from a retail supply contract. The layout and the lines that apply vary by distribution utility, customer class and supply arrangement.

How to Read Your Electric Bill Step by Step

1. Check the billing period, the number of days billed, and your rate type. Distribution utilities group business customers into classes, for example general service for smaller loads and general power for larger ones.
2. Find your billed consumption in kilowatt-hours (kWh). This is the energy the site used during the period.
3. If your rate includes demand, find your billed demand in kilowatts (kW). Demand and consumption are different measurements, explained below.
4. Identify the charge groups that actually appear on your bill: generation or supply, transmission, ancillary services, distribution, system loss, taxes, and other charges or adjustments.
5. Compare usage, demand and each charge with a comparable earlier period. The amount due alone does not tell you what changed.
6. If your business is a contestable customer, compare the supply components against your retail supply contract. Regulated charges such as distribution still apply after you switch suppliers.

Electric Bill Charges Explained

Here is the short version. Each charge has its own section below.

• Generation or supply. Covers the cost of the energy bought for you under your supply arrangement. Check the generation rate or your contract rate, and the kWh it is applied to.
• Transmission. Covers use of the high-voltage grid. Check the rate and whether your class is charged per kWh or per kW.
• Ancillary services. Covers the reserves that keep the grid stable. Some bills include it in the transmission total. Others show it as its own line.
• Distribution. Covers the local utility's network, metering and delivery. Check your customer class and any energy (kWh), demand (kW) and fixed monthly charges.
• System loss. Covers the allowed cost of electricity lost in the network. Check the rate shown and the kWh it is applied to.
• Taxes and other charges. Covers VAT, universal charges, FIT-All, subsidies and other approved items. Check which lines actually appear and the billing period they apply to.

Generation or Supply Charge

The generation charge is the cost of the electricity itself. A distribution utility buys power for its customers through supply agreements with generation companies and through the Wholesale Electricity Spot Market (WESM), and passes that cost through on the bill. For a contestable customer that has switched, this line is replaced by the rate in its contract with a Retail Electricity Supplier (RES). The generation charge is usually the largest line on a business bill, but its share varies by utility, month and customer, so read it from your own bill rather than relying on a typical percentage.

WESM is the market where generators sell and buyers purchase electricity in bulk. It is operated by the Independent Electricity Market Operator of the Philippines (IEMOP) and has dispatched and priced electricity in five-minute intervals since 26 June 2021. Wholesale spot prices are not the rate on your bill. Your bill reflects the utility's mix of contracts and spot purchases, or the terms of your retail supply contract.

Transmission Charge and Ancillary Services

The transmission charge pays for moving electricity across the high-voltage grid operated by the National Grid Corporation of the Philippines (NGCP), from power plants to your distribution utility. The utility collects it and passes it on to NGCP.

Ancillary services are the reserves that keep the grid stable, such as generating capacity that responds when a power plant trips. Some bills show them as a separate line next to transmission. Others, including the summary page of many residential and business bills, include them in the transmission total. Since 2024 these reserves have been traded in a WESM reserve market, so the charge moves with reserve prices.

On some commercial rates, transmission and ancillary services are charged per kW of demand instead of per kWh. Check which basis your bill uses before comparing months.

Distribution Charge

The distribution charge is the local utility's own charge for delivering power over its lower-voltage network to your site. Unlike the generation and transmission charges, which the utility passes through, the distribution charge is the part the utility keeps to run its network, meters and customer service. It is regulated by the Energy Regulatory Commission (ERC).

On larger commercial and industrial rates it has more than one part: a charge per kW of demand, a charge per kWh, and fixed monthly supply and metering charges. This is why two businesses that use the same kWh can pay different distribution amounts.

System Loss Charge

Some electricity is lost between the grid and your meter. Most of it is technical loss, such as heat in wires and transformers. Some is non-technical, such as pilferage and metering errors. The system loss charge recovers the cost of these losses, but only up to a cap set by the ERC, and the cap is different for private distribution utilities and electric cooperatives. Losses above the cap cannot be charged to customers.

The rules on this charge are under review in 2026, including how VAT applies to it, so check the current treatment on your own bill.

Taxes and Other Charges

The rest of the bill is a group of taxes and government-approved charges. Which ones appear depends on your utility and the billing period.

• Value-added tax (VAT). VAT of 12% applies to most of the electricity charges. It is not charged on universal charges, FIT-All, the lifeline subsidy or local franchise tax. Because some energy is zero-rated, the VAT shown against a line can work out to less than 12% of it.
• Universal charges. These fund programs set by the Electric Power Industry Reform Act (EPIRA): electrification of missionary areas, an environmental charge, and the recovery of stranded debts.
• Feed-in Tariff Allowance (FIT-All). A uniform per-kWh charge on on-grid customers that funds the feed-in tariff program for renewable energy. The ERC approves the rate.
• Green Energy Auction Allowance (GEA-All). A per-kWh charge that funds renewable energy contracted through the Department of Energy's Green Energy Auction Program. It first appeared on bills in January 2026. Its collection is suspended through the December 2026 billing month, so most bills currently show it at zero.
• Subsidies. Lifeline discounts for qualified low-income households and senior citizen discounts go to eligible residential customers. Their cost is recovered through small per-kWh charges on other customers, including businesses.
• Local taxes. Some bills also pass on local franchise tax and real property tax on utility assets.

Sample Philippine Business Electric Bill: Worked Example

The example below is an illustrative model of one month's bill for a business on a demand-based general power rate. The numbers are illustrative, not a current tariff or a quote. They show how the lines on a bill relate to each other.

• Billing period: 30 days
• Consumption: 45,000 kWh
• Billed demand: 150 kW

Charges for this billing period, in the order they appear in the Bill Computation Summary on a Meralco bill:

• Generation: 45,000 kWh × ₱7.0000/kWh = ₱315,000.00
• Transmission (including ancillary services): 150 kW × ₱400.00/kW = ₱60,000.00
• System Loss: 45,000 kWh × ₱0.6000/kWh = ₱27,000.00
• Distribution: 150 kW × ₱230.00/kW, plus 45,000 kWh × ₱0.5000/kWh, plus ₱1,000.00 fixed supply and metering = ₱58,000.00
• Senior Citizen: 45,000 kWh × ₱0.0050/kWh = ₱225.00
• Government Taxes: VAT at 12% on generation, transmission and distribution (₱433,000.00) = ₱51,960.00
• Universal Charges: 45,000 kWh × ₱0.2000/kWh = ₱9,000.00
• FiT-All (Renewable): 45,000 kWh × ₱0.1000/kWh = ₱4,500.00
• GEA-All (Renewable): ₱0.00, because collection is suspended through the December 2026 billing month
• Lifeline: 45,000 kWh × ₱0.0100/kWh = ₱450.00

Total Amount Due: ₱526,135.00

This model leaves out local taxes and applies no VAT to system loss, to keep the arithmetic easy to follow. It shows two things. First, ₱94,500 of the bill (about 18%) depends on peak demand in kW: the transmission line and the demand part of distribution. Second, the generation line is the largest, and it is the line a contestable customer can negotiate with a supplier.

kWh vs. kW: Why Consumption and Demand Matter

Kilowatt-hours (kWh) measure energy: how much electricity the site used over the billing period. Kilowatts (kW) measure demand: how fast the site was drawing power at its busiest point. On demand-based rates, billed demand is usually the higher of the month's peak demand, measured over a short metering interval, and a minimum billing demand set in your service contract.

A site can lower its kWh and still see a high demand charge if large equipment starts at the same time, even briefly. Staggering the start-up of chillers, compressors and kitchen equipment can lower billed demand without changing total consumption.

Why Did My Electric Bill Increase?

There is rarely one cause. Check these in order:

1. Billing days. A 33-day period costs more than a 28-day period at the same daily use.
2. Consumption (kWh). Compare with the same month last year as well as last month, because cooling load changes with the season.
3. Demand (kW). A single high-demand interval can raise the demand charges for the whole month.
4. Rates. Generation, transmission and ancillary rates change monthly. Compare the rate on each line, not just the totals.
5. Adjustments and taxes. Look for one-time adjustments, refunds, or charges that were suspended and have resumed.

Which Electric Bill Costs Can a Business Influence?

Some lines respond to what you do. Others are set by regulators and apply to every customer in your class.

• Consumption (kWh). Efficiency, schedules and equipment upgrades lower every per-kWh line on the bill.
• Demand (kW). Managing when large loads start lowers every per-kW line. How energy data helps businesses explains how to see where and when a site uses power.
• Generation or supply rate. For an eligible contestable customer, this is the line a supplier contract can change.
• Transmission, ancillary services, distribution, system loss, universal charges and taxes. These are regulated or pass-through charges. A business cannot negotiate them, though lower consumption and demand reduce the amounts.

What Changes If a Business Switches Electricity Suppliers?

Under the Retail Competition and Open Access (RCOA) program, an eligible business can buy its electricity supply from a licensed Retail Electricity Supplier instead of from its distribution utility. From 26 June 2026, the ERC lowered the eligibility threshold from 500 kW to 100 kW, for single sites and for groups of sites under the Retail Aggregation Program. The distribution utility still delivers the power, maintains the lines and reads the meter.

After switching, the generation charge is replaced by the rate and terms in your supply contract. The regulated delivery charges still apply. Depending on the billing option, a business receives separate bills from its supplier and its distribution utility, or one consolidated bill. Whether switching lowers your total cost depends on the contract rate, its terms and your load profile, so compare offers against your own bills. See who is eligible under RCOA and how RCOA works.

Frequently Asked Questions About Electric Bills

What is the generation charge on an electric bill?

It is the cost of the electricity itself, bought by your distribution utility through supply agreements and the spot market, or set by your contract with a Retail Electricity Supplier. It is usually the largest line on a business bill, but its share differs by utility, month and customer.

What is the transmission charge on an electricity bill?

It pays NGCP for carrying power over the high-voltage grid to your distribution utility. It also covers ancillary services, the reserves that keep the grid stable, which some bills show as a separate line. Both are regulated and change monthly.

What is the distribution charge on an electric bill?

It is your local utility's charge for its network, meters and customer service. It is separate from the cost of the electricity. On larger commercial rates it can include per-kW, per-kWh and fixed monthly parts.

Why did my electric bill go up?

Compare the billing days, your kWh, your kW demand, the rate on each line, and any adjustments or resumed charges against a comparable earlier bill. Usually more than one of these changed.

Can a business reduce its electric bill by switching suppliers?

An eligible business can choose a Retail Electricity Supplier and negotiate its supply rate and contract terms. Transmission, distribution and other regulated charges still apply, so the effect on the total bill depends on the contract and your usage. Savings are not guaranteed.

Sources and Technical Review

• Independent Electricity Market Operator of the Philippines (IEMOP), Enhanced WESM Design and Operations and five-minute dispatch
• IEMOP, Reserve market commercial operations
• Meralco, How to read your business bill
• Meralco, Summary Schedule of Rates, September 2026
• Meralco, GEA-All FAQs
• Energy Regulatory Commission, Resolutions and rules
• Philippine News Agency, RCOA threshold lowered to 100 kW

This guide describes general billing practice in the Philippines as of October 2026. Rates and rules change, so check your own bill and current ERC issuances.

Check whether your business is eligible to choose an electricity supplier