How California's Tiered Electricity Rates Work - and How to Lower Your Bill Legally
How do California's tiered electricity rates work?
California's major investor-owned utilities - PG&E, SCE and SDG&E - charge residential customers a lower per-kilowatt-hour rate for electricity use up to a set "baseline" amount and a higher rate for usage above that. The baseline varies by climate zone and season. Using less than your baseline keeps more of your bill at the cheaper Tier 1 rate.
How do I find out my electricity baseline allocation in California?
Your monthly utility bill is required to show your baseline allocation in kilowatt-hours for that billing period. Your utility's website or customer service line can also confirm your specific climate zone and baseline amount by address. Baseline quantities differ significantly across PG&E, SCE and SDG&E service territories and by time of year.
Can I switch my California electricity rate plan, and is there a fee?
Most residential customers can switch between available rate schedules - such as moving from a standard tiered rate to a Time-of-Use plan - once per year through their utility's website or customer service line, typically at no charge. Each utility offers a bill comparison tool using your past usage to estimate potential savings under a different plan before you commit.
What should I do if my California electricity bill seems unusually high?
If your bill spikes without a clear reason, contact your utility to request a billing history and, if needed, a meter test. Under California Public Utilities Commission rules, utilities are generally required to test residential meters upon request, often at no charge for an initial test. If the dispute isn't resolved, you can file a complaint with the CPUC at cpuc.ca.gov.
Does California have Time-of-Use electricity rates, and how are they different from tiered rates?
Yes. Under Time-of-Use rates, the price per kilowatt-hour changes based on the time of day rather than total monthly usage - higher during peak afternoon and evening hours, lower overnight and on weekends. Standard tiered rates charge more as total monthly usage increases, regardless of when that electricity is consumed. Some California customers were automatically enrolled in Time-of-Use plans in recent years; your bill's rate schedule name will indicate which structure applies to your account.
California has some of the highest residential electricity rates in the country, and the structure of how utilities charge for power makes a real difference in what ends up on your bill. Most customers served by the state's three largest investor-owned utilities - Pacific Gas and Electric, Southern California Edison and San Diego Gas and Electric - pay under a tiered rate system, meaning the more electricity you use, the higher the price per kilowatt-hour. Understanding how that works can help you make choices that meaningfully cut what you owe each month.
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What the Tiered System Actually Means
Under the standard tiered structure, each utility sets a "baseline" amount of electricity for your climate zone - a figure meant to approximate what a household needs for basic comfort. Usage within that baseline is billed at a lower Tier 1 rate. Usage above it moves into a higher Tier 2 rate. The baseline itself varies by where you live and by season: customers in hotter inland areas generally get a higher baseline than those on the coast, because air conditioning loads are higher.
The California Public Utilities Commission, which regulates these utilities, sets the framework for how baseline quantities and tier ratios are structured. As of 2026, the CPUC has also maintained a tiered rate cap that limits how much more expensive Tier 2 can be relative to Tier 1 - but the exact cents-per-kilowatt-hour rates change periodically through rate cases. PG&E, SCE and SDG&E each publish their current rate schedules on their websites and through their customer service lines, and those are the figures to use for actual calculations, not estimates from any third-party source.
One thing that catches customers off guard: some customers are on Time-of-Use rates rather than standard tiered rates, either by choice or because they were automatically enrolled following CPUC policy changes in recent years. On a Time-of-Use plan, the price per kilowatt-hour varies by time of day - higher during peak afternoon and evening hours, lower overnight and on weekends. If you're not sure which rate structure you're on, your bill's first or second page will name your rate schedule, and the utility's online account portal will show your current plan.
How to Find Out Your Baseline Allocation
Your utility is required to print your baseline allocation on your monthly bill, typically expressed as kilowatt-hours for the billing period. If you're consistently using more than your baseline - meaning a significant chunk of your usage is billed at the higher Tier 2 rate - that's the number to focus on reducing.
Each utility also publishes baseline region maps and tables online. PG&E's service territory, for example, spans dozens of climate zones with different allocations; a customer in Fresno will have a different baseline than one in San Francisco. Calling the utility's customer service line and giving them your address is the most direct way to confirm your specific allocation and climate zone if your bill isn't clear.
Practical Ways to Stay in the Lower Tier
Shifting large appliance use to off-peak hours matters most for Time-of-Use customers, but even on standard tiered rates, the timing and habit changes that reduce total consumption will keep more of your usage in the lower Tier 1 bracket. The clearest opportunities are usually heating and cooling, water heating and laundry.
Thermostats are the biggest lever for most households. The California Energy Commission recommends setting air conditioning to 78 degrees or higher when you're home, higher when you're away - and using fans to manage comfort in the hours around that threshold. Pre-cooling or pre-heating a home before on-peak hours, if you're on Time-of-Use rates, is a standard strategy for avoiding the highest-priced electricity windows.
Water heaters are typically a household's second-largest electricity draw after HVAC. If yours is electric, lowering the temperature setting to 120 degrees (a temperature the U.S. Department of Energy recommends as adequate for most uses) reduces the energy needed to maintain the tank. Insulating older water heater tanks and the first few feet of hot-water pipe can also reduce standby heat loss.
Utilities also offer free energy audits for residential customers in most service areas. PG&E, SCE and SDG&E each have some version of this program, where a technician or online tool assesses where your home is losing energy and what improvements would have the greatest payback. These audits don't obligate you to buy anything, and they can surface problems - a poorly sealed attic, an aging refrigerator running constantly - that aren't obvious from the bill itself.
Rate Schedule Changes and How to Request One
If you're currently on a standard tiered rate and want to evaluate whether a Time-of-Use plan would save you money - or vice versa - each utility offers a bill comparison tool on its website or through its customer service line. These tools use your past 12 months of usage history to estimate what you would have paid under a different rate structure. They're not a guarantee of future savings, but they're a reasonable starting point.
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Customers can generally switch rate schedules once per year through the utility's website or customer service line, without a fee. Some schedules have eligibility restrictions - certain medical baseline rates require documentation of qualifying medical equipment, for instance - but switching between standard residential rate options is typically straightforward. If you've recently made a significant change to your home (added solar, bought an electric vehicle, changed occupancy), that's a reasonable prompt to revisit which rate schedule fits your actual usage pattern.
Customers with solar installations and net energy metering agreements are on separate rate structures governed by their NEM agreement, which has its own rules about how exported power is credited. Those rules have changed significantly in California over the past few years as the CPUC has revised the NEM program, and if you're a solar customer, your utility's NEM team or a licensed solar contractor is the right resource for current specifics - not general information about the standard tiered structure.
If Your Bill Seems Wrong
Unusually high bills do sometimes reflect a meter error, an estimated read, or an appliance failure rather than actual consumption. If your bill spikes without an obvious explanation, you can request a meter test through your utility - each major utility is required under CPUC rules to test residential meters upon customer request, typically at no charge for the first test within a set period. You can also request a billing history to see whether the spike is genuinely anomalous or part of a trend you hadn't noticed.
The CPUC's Consumer Affairs Branch handles formal complaints against regulated utilities if a dispute with the utility itself doesn't resolve the issue. Their contact information is at cpuc.ca.gov.
This is general information, not legal or financial advice. Electricity rates, baseline allocations and program details change through CPUC rate cases, and what applies to your account depends on your specific utility, rate schedule and location. Verify your current rate and baseline directly with PG&E at pge.com, SCE at sce.com, or SDG&E at sdge.com, and check the California Public Utilities Commission at cpuc.ca.gov for regulatory information and complaint options.