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Understanding Your Energy Statement

Rate Options

You have the power to choose from several rate options that can help control energy costs based on your energy use.

  • Customers with an AMR meter can select either Anytime Users or Overnight Savers.
  • Customers with an upgraded smart meter can select one of the following choices: Anytime Users, Evening/Morning Savers, Overnight Savers, Smart Savers, or Ultimate Savers.

Summer Rates vs. Winter Rates

During the summer months, we all use more energy to cool down our homes and office buildings, which means we need more energy on the grid to accommodate that demand. That’s why in June, July, August and September, summer rates go into effect to cover the cost of the additional energy. Winter rates run from October through May, and they are historically lower than summer rates due to a decreased demand for energy.

The fluctuation in energy cost between summer and winter also has to do with the kind of energy we use to heat and cool our homes and businesses. Most people rely on natural gas to heat their homes in the winter, whereas in the summer, most people rely on electricity to run air conditioners.

Budget Bill Adjustment

If you participate in Budget Billing, you may see a Budget Bill Adjustment on your monthly statement. This amount is the difference between the cost of your actual usage that month and your Budget Billing Amount.

CCF - Natural Gas

CCF stands for 100 cubic feet. It is the basic unit for measuring the volume of natural gas used.

Energy Efficiency Investment Charge

EEIC reflects costs incurred to provide customers with energy efficiency programs enabled by the Missouri Energy Efficiency Investment Act. This charge can fluctuate and will remain on the monthly energy statement beyond the implementation dates of the program.

Electric Customer Charge - Residential

The electric customer charge - the fixed cost of providing service based on rate classification.

Fuel Adjustment Charge (FAC)

The FAC provides that 95% of the increases or decreases in actual net energy costs in between rate cases (net fuel and purchased power costs, and net off-system sales, including transportation) shall be passed through to customers. The FAC addresses the volatile nature of these costs. The PSC must review and approve our FAC before changes are made. When we talk about fuel, we are referring to resources such as coal or nuclear, which we use to generate electricity.


Infrastructure Replacement Surcharge (ISRS) 

ISRS reflects the cost Ameren Missouri has incurred for certain natural gas system replacements/improvements and gas facility relocations due to road construction projects since Ameren Missouri’s last natural gas rate adjustment.

Kilowatt-hour (kWh)

kWh is the basic unit for measuring the amount of electricity used. Current Usage shows how many kilowatt-hours have been used since the previous meter reading. The Electric Usage Summary compares electric usage for the same time period year-to-year.

Lighting Charge 

The Lighting Charge is a flat monthly rate, plus an FAC adjustment, for the use of Ameren Missouri-owned lighting installed on a customer's property. This charge includes the cost of installing, owning, operating and maintaining the lights.

Natural Gas Charge 

The Natural Gas Charge reflects the cost of natural gas provided (energy charge) based on rate classification (e.g., residential), plus the fixed cost of providing service (customer charge) including customer, demand and non-PGA (Purchase Gas Adjustment) commodity-related costs.

Purchase Gas Adjustment (PGA) 

The PGA reflects the cost of natural gas that Ameren Missouri purchases from suppliers and then delivers to our customers. This includes the cost of storing and transporting natural gas to our system. We pass this cost along to customers on a dollar-for-dollar basis. The PGA is based on the number of CCF provided.

Taxes - Missouri, Local and Municipal 

Ameren Missouri collects taxes, or municipal charges, on behalf of the city and/or county in which you live. The taxes we collect are passed through to the city/county/state. Beginning September 27, 2016, there may be municipal taxes applied to Non-Service-related charges, which can include late pay charges, re-connection fees, and special contracts.

Municipalities impacted by this change.

Monthly Community Solar Charge

Each subscribed block of solar energy through the Community Solar program will be billed at the Community Solar rate each month. This is the number of blocks enrolled times 100 kWh times ($.1419/kWh), which is $14.19 per 100 kWh block. (Community Solar Rate). This will be a separate line item on your monthly energy statement.

The same amount of kWh (number of blocks enrolled times 100 kWh) will be deducted from your regular rate. For example, if you are enrolled in 3 blocks of Community Solar and your current monthly usage is 990 kWh you will be billed 3 blocks x 100 kWh/block x $.1419/kWh (Community Solar rate) = $42.57 plus your regular energy rate times (900 kWh-300 kWh) plus other applicable charges. The rate included here and in the image is an example. For the current rate, view the Community Solar Tariff (PDF).

Renewable Energy Adjustment (RESRAM)

Ameren Missouri established the Renewable Energy Standard Rate Adjustment Mechanism (RESRAM) to comply with voter approved legislation that requires 15% of energy produced to be renewable, such as solar and wind. The RESRAM line item is adjusted on an annual basis and may appear as a charge or a credit.

Weather Normalization Adjustment Rider (WNAR)

The WNAR allows Ameren Missouri to make rate adjustments outside of a general rate case. Those rate adjustments reflect non-gas revenue effects, either positive or negative, for differences between actual heating degree days and normal heating degree days. Only revenue effects due to variations in weather apply. Ameren Missouri may request changes to the WNAR annually and they must be approved by the Missouri Public Service Commission.