Guam Power Authority Rate Calculator

Guam Power Authority (GPA) Estimated Bill Calculator

Enter the total kilowatt-hours used from your meter reading.

Base rate for power delivery (check latest GPA tariff). Default is approximate residential base.

Levelized Energy Adjustment Clause. This varies frequently based on fuel prices.

Standard fixed residential fee regardless of usage.

Estimated Monthly Bill

$0.00

Total Non-Fuel Usage Cost: $0.00

Total Fuel Recovery (LEAC) Cost: $0.00

Fixed Customer Charge: $0.00

function calculateGpaBill() { // Get input values var kwhUsageInput = document.getElementById('kwhUsage').value; var nonFuelRateInput = document.getElementById('nonFuelRate').value; var leacRateInput = document.getElementById('leacRate').value; var fixedChargeInput = document.getElementById('fixedCharge').value; // Parse values to floats var kwh = parseFloat(kwhUsageInput); var nonFuelRate = parseFloat(nonFuelRateInput); var leacRate = parseFloat(leacRateInput); var fixedCharge = parseFloat(fixedChargeInput); // Validate inputs if (isNaN(kwh) || kwh < 0) { alert("Please enter a valid, non-negative amount for kWh usage."); return; } if (isNaN(nonFuelRate) || nonFuelRate < 0) { alert("Please enter a valid Non-Fuel Rate."); return; } if (isNaN(leacRate) || leacRate < 0) { alert("Please enter a valid LEAC Rate."); return; } if (isNaN(fixedCharge) || fixedCharge < 0) { alert("Please enter a valid Fixed Customer Charge."); return; } // Calculate components var totalNonFuelCost = kwh * nonFuelRate; var totalLeacCost = kwh * leacRate; var totalEstimatedBill = totalNonFuelCost + totalLeacCost + fixedCharge; // Display results document.getElementById('nonFuelTotal').innerHTML = "$" + totalNonFuelCost.toFixed(2); document.getElementById('leacTotal').innerHTML = "$" + totalLeacCost.toFixed(2); document.getElementById('fixedTotal').innerHTML = "$" + fixedCharge.toFixed(2); document.getElementById('totalBillOutput').innerHTML = "$" + totalEstimatedBill.toFixed(2); // Show result container document.getElementById('gpaResult').style.display = 'block'; }

Understanding Your Guam Power Authority (GPA) Electricity Bill

Electricity costs on Guam can be a significant part of a household budget due to the island's reliance on imported fuel for power generation. Understanding how the Guam Power Authority (GPA) calculates your bill is the first step toward managing your energy expenses. This calculator helps estimate your monthly statement based on the primary components of GPA's rate structure.

Key Components of a GPA Residential Bill

Your GPA bill is not just a single number multiplied by your usage. It is composed of several distinct charges, which are reflected in the calculator above:

• Usage (kWh): This is the raw amount of electricity you consumed during the billing period, measured in kilowatt-hours. Running air conditioning is typically the largest contributor to high kWh usage on Guam.
• Fixed Customer Charge: This is a flat monthly fee that covers the basic costs of metering, billing, and maintaining connection to the grid, regardless of how much electricity you actually use.
• Non-Fuel Energy Charge: This rate covers GPA's operational costs, infrastructure maintenance (poles, wires, power plants), and personnel, excluding the cost of fuel. This rate is generally stable but is subject to periodic reviews by the Public Utilities Commission (PUC).
• Fuel Recovery Charge (LEAC): The "Levelized Energy Adjustment Clause" (LEAC) is often the most volatile part of the bill. It is a pass-through charge that reflects the actual cost of fuel used to generate electricity. Because Guam relies heavily on shipped-in oil, global oil price fluctuations directly impact the LEAC rate, causing your bill to rise or fall even if your usage remains the same.

Why Do GPA Rates Fluctuate?

The primary driver of bill fluctuation on Guam, aside from changes in your personal air conditioning usage, is the LEAC. The GPA petitions the Public Utilities Commission to adjust the LEAC rate periodically (usually every six months, though sometimes more frequently) based on current and projected fuel costs. When global fuel prices spike, the LEAC increases, significantly raising the total cost per kWh for consumers.

Using This Calculator

To get the most accurate estimate, you should look at your most recent GPA bill or visit the official GPA website to find the current Non-Fuel Energy Charge and the current LEAC rate. The default values provided in the calculator are realistic estimates for a typical residential setup but may not reflect the exact rates in effect today. Enter your usage from your meter reading or previous bills into the "Monthly Usage (kWh)" field to see how different usage levels affect your total estimated costs.