The Most Expensive Electricity in America
Hawaii's commercial electricity rates are the highest in the United States by a wide margin. As of 2025, the average commercial electricity rate across the Hawaiian Islands is approximately 39.89 cents per kilowatt-hour, compared to a national average of roughly 13.6 cents per kWh. This means that Hawaiian businesses pay approximately 2.2 times the national average for every unit of electricity they consume — a cost differential that profoundly affects the operating economics of every commercial property in the state.
The rate differential is even more dramatic on certain islands. Maui County commercial rates have exceeded 45 cents per kWh during peak periods, and Hawaii Island (the Big Island) has seen rates fluctuate significantly due to the interaction between geothermal generation, imported oil prices, and local demand patterns. Only Oahu, served by Hawaiian Electric Company and benefiting from economies of scale associated with the largest population center, consistently maintains rates at the lower end of the statewide range — though even Oahu rates are roughly triple the cheapest commercial electricity markets on the mainland.
For commercial property owners and operators in Hawaii, electricity costs are not a minor line item — they are frequently the single largest controllable operating expense after debt service and personnel costs. A 100,000-square-foot office building in Honolulu with a typical EUI can face annual electricity costs exceeding $400,000, compared to approximately $180,000 for an equivalent building in a mainland market with average rates. This cost pressure makes energy management in Hawaii a strategic priority rather than an operational afterthought.
Why Hawaii's Rates Are So High: Oil Dependency
The fundamental driver of Hawaii's extreme electricity costs is the state's heavy dependence on imported petroleum for power generation. Unlike the continental United States, where natural gas, coal, nuclear, and renewable sources provide a diverse generation mix, Hawaii has historically generated approximately 60 to 80 percent of its electricity from oil-fired power plants. This reliance on imported oil means that Hawaii's electricity prices are directly linked to global oil markets, making the state uniquely vulnerable to commodity price volatility.
The geography of Hawaii creates the conditions for this oil dependency. The islands lack significant indigenous fossil fuel resources and cannot connect to the mainland electrical grid via transmission lines. Every barrel of oil used for power generation must be shipped across the Pacific Ocean, adding transportation costs that mainland utilities do not face. The isolated grid systems on each island also prevent the kind of regional electricity trading that helps mainland utilities optimize generation costs and share reserve capacity.
Each major island operates essentially as an independent electrical grid, with generation, transmission, and distribution infrastructure that must be sized to meet that island's peak demand without the ability to import or export power. This island-by-island grid architecture means that each system must maintain sufficient reserve generation capacity to handle outages and demand fluctuations independently, driving up the fixed costs that are allocated across a relatively small customer base.
While Hawaii has made significant progress in deploying renewable energy — rooftop solar penetration is among the highest in the nation — the intermittent nature of solar and wind generation means that oil-fired plants remain essential for baseload and peaking capacity. Until large-scale battery storage is deployed at sufficient scale to firm up renewable generation, oil will continue to play a significant role in Hawaii's electricity supply, and rates will continue to reflect that dependency.
Impact on Commercial Property Operations
Hawaii's extreme electricity costs create operational dynamics that are fundamentally different from mainland commercial real estate markets. Energy efficiency investments that would have modest payback periods on the mainland can generate rapid returns in Hawaii, where every kWh saved represents 40 cents in avoided costs. This inverted economics makes aggressive energy management not just environmentally responsible but financially compelling.
Cooling loads are the dominant energy consumer in Hawaii's commercial buildings. The tropical climate, with average high temperatures in the mid-80s Fahrenheit year-round and relative humidity frequently exceeding 70 percent, means that air conditioning runs continuously during occupied hours and often around the clock in data centers, hotels, and healthcare facilities. HVAC systems typically account for 50 to 60 percent of total electricity consumption in Hawaiian commercial buildings, compared to 30 to 40 percent in many mainland markets where heating loads provide seasonal relief from cooling-dominated consumption.
Demand charges add another layer of cost pressure. Hawaiian Electric Company's commercial rate schedules include demand charges that can represent 30 to 40 percent of a building's total electricity bill during peak months. A single afternoon when all building systems are running at maximum capacity can set the demand charge for the entire billing period, making peak load management a critical cost-control strategy. Building automation systems that can shift or shed loads during peak periods can generate significant savings by reducing the demand charge component of the bill.
For multi-tenant commercial properties, the cost allocation implications are substantial. In gross-lease structures where the landlord covers utility costs, electricity can represent the single largest operating expense recovery challenge. In net-lease structures where tenants pay their own utilities, the high cost of electricity can make Hawaiian commercial spaces less competitive with mainland alternatives for cost-sensitive tenants, particularly in sectors like call centers, data processing, and light manufacturing where electricity is a major input cost.
Hawaii's 100% Renewable Energy Mandate
In 2015, Hawaii became the first state in the nation to enact a 100 percent renewable energy mandate, requiring that all of the state's electricity be generated from renewable sources by 2045. This landmark legislation, codified as the Hawaii Renewable Portfolio Standard, established interim targets of 30 percent renewable generation by 2020, 40 percent by 2030, 70 percent by 2040, and 100 percent by 2045. The state met and exceeded its 2020 target ahead of schedule, driven primarily by the explosive growth of rooftop solar installations.
For commercial building owners, the renewable energy mandate creates both opportunities and uncertainties. On the opportunity side, the transition away from oil-fired generation should eventually reduce the fuel cost component of electricity rates, which currently represents approximately 40 to 50 percent of the total retail rate. As renewable generation displaces oil, the variable cost of electricity should decline, though the capital investments required to build new renewable capacity and grid-scale battery storage will add to fixed cost components.
The deployment of rooftop solar on commercial buildings has been a significant trend in Hawaii, driven by the combination of excellent solar resources, high electricity rates, and favorable net energy metering policies. Commercial solar installations in Hawaii can achieve payback periods of 3 to 5 years — among the fastest in the nation — and can reduce a building's grid electricity purchases by 30 to 50 percent depending on system size, roof orientation, and consumption patterns. Building owners who have not yet explored commercial solar should consider it as one of the highest-return capital investments available in the Hawaiian market.
Utility Data Visibility as a Cost-Control Tool
In a market where electricity costs are 2.2 times the national average, the financial value of detailed utility data visibility is proportionally amplified. Every billing error, estimated read, demand charge spike, or rate schedule misapplication costs Hawaiian building owners roughly twice what the same error would cost on the mainland. This makes utility bill auditing and continuous monitoring not just good practice but a financial imperative.
Common utility billing issues that are worth detecting in any market become particularly costly in Hawaii. Estimated meter reads that systematically overstate consumption, incorrect rate schedule assignments that place a building on a less favorable tariff, and demand charge spikes caused by temporary equipment malfunctions can each add thousands of dollars per month to a building's electricity costs. In a market where monthly electricity bills for a single commercial building can exceed $30,000, even a 5 percent billing discrepancy represents a significant financial impact.
Hawaiian Electric's rate structures are complex, with multiple rate schedules, time-of-use options, and demand charge tiers that vary by island and customer class. Building owners who are not actively monitoring their rate schedule assignment and evaluating whether alternative tariff options would be more favorable may be leaving significant savings on the table. The difference between the most and least favorable rate schedule for a given building can represent 10 to 15 percent of total electricity costs.
Strategic Priorities for Hawaii Commercial Properties
For commercial property owners operating in Hawaii, the extreme cost environment demands a more aggressive approach to energy management than would be warranted on the mainland. The 2.2x rate multiplier means that investments in energy efficiency, solar generation, and utility data management yield returns that are proportionally higher than identical investments in lower-cost markets. Building owners who apply mainland assumptions about energy management ROI to the Hawaiian market are systematically underinvesting in one of their most impactful cost-control levers.
The first priority should be establishing comprehensive utility data visibility across all properties. This means automated data collection from Hawaiian Electric, ongoing bill auditing to catch errors and rate misapplications, and continuous monitoring of consumption patterns to identify opportunities for demand management and load shifting. In a market where a single demand spike can cost thousands of dollars, real-time or near-real-time consumption monitoring pays for itself rapidly.
Second, building owners should evaluate every property for rooftop solar potential. Hawaii's combination of exceptional solar resources, high electricity rates, and available federal and state incentives makes commercial solar one of the most attractive capital investments in the market. Properties that are not suitable for rooftop solar due to structural or shading constraints should be evaluated for participation in community solar programs or virtual net metering arrangements.
Finally, as Hawaii transitions toward its 100 percent renewable energy goal, building owners should plan for changes in rate structures that will accompany the grid transformation. Time-of-use rates, demand response programs, and battery storage incentives are all likely to become more prominent as the grid integrates higher levels of intermittent renewable generation. Building owners who are already collecting and analyzing detailed utility data will be best positioned to take advantage of these evolving rate structures and program opportunities as they emerge.