Full service
21.49¢
per kWh, 2025 average revenue
$101.86 / month at 474 kWh
Price −28.1% from 2024
Investor Owned · 1,274,856 residential customers · Massachusetts
Why is my Eversource Massachusetts electric bill so high?
EIA respondent: NSTAR Electric Company. Reviewed October 14, 2026. Also searched as Eversource.
Eversource Massachusetts did not have one residential price in 2025. EIA keeps the service types separate. 306,795 full service customers averaged 21.49¢ per kWh and $101.86 a month; 968,061 delivery only customers averaged 20.06¢ per kWh and $114.60 a month. A blended average would describe neither bill. The legal name in the filing is NSTAR Electric Company.
Massachusetts's 2025 statewide residential average was 30.41¢. July 2026 was 30.49¢, versus 30.07¢ in July 2025 (+1.4%). Compare each Eversource Massachusetts service type with those figures on its own.
From 2024 to 2025, the average monthly bill for full service changed −25.7%. Average use changed +3.5% and average price changed −28.1%. Holding the 2024 price fixed, the usage change accounts for $4.74 a month. The price change, applied to 2025 usage, accounts for −$39.90.
EIA Form 861, 2025 final · Reviewed October 14, 2026
EIA Electric Power Monthly, Table 5.6.A · Reviewed October 14, 2026
Delivery only
20.06¢
per kWh, 2025 average revenue
$114.60 / month at 571 kWh
Price +23.3% from 2024
The rate on the record
Investor-owned base rates are usually set in a state docket. Riders can change outside a full rate case. Average revenue per kilowatt-hour is total residential revenue divided by residential sales. It is not a tariff schedule.
| Service | Customers | Price | Monthly use | Monthly bill | Vs 2024 price |
|---|---|---|---|---|---|
| Full service | 306,795 | 21.49¢ | 474 kWh | $101.86 | −28.1% |
| Delivery only | 968,061 | 20.06¢ | 571 kWh | $114.60 | +23.3% |
EIA-861 sales to ultimate customers, 2025 final, compared with 2024 · Reviewed October 14, 2026
By state
| State | Service | Customers | Price | Monthly bill |
|---|---|---|---|---|
| MA | Full service | 306,795 | 21.49¢ | $101.86 |
| MA | Delivery only | 968,061 | 20.06¢ | $114.60 |
Audit the full service average
Revenue 374,987 thousand dollars. Sales 1,744,885 MWh. Customers 306,795. Cents per kWh = revenue ÷ megawatt-hours × 100. Monthly bill = revenue × 1,000 ÷ customers ÷ 12.
Audit the delivery only average
Revenue 1,331,243 thousand dollars. Sales 6,637,763 MWh. Customers 968,061. Cents per kWh = revenue ÷ megawatt-hours × 100. Monthly bill = revenue × 1,000 ÷ customers ÷ 12.
Why a Eversource Massachusetts bill moved
The price change was the larger piece
Eversource Massachusetts reported a delivery only average of $114.60 a month in 2025, +34.8% from $85.01 in 2024. Holding the 2024 price fixed, the usage change of +9.4% is worth $7.96 a month. The price change of +23.3%, from 16.27¢ to 20.06¢, is worth $21.63 on 2025 usage.
Below the Massachusetts average
20.06¢ per kWh is below Massachusetts's 2025 residential average of 30.41¢. July 2026 in the state was 30.49¢, versus 30.07¢ a year earlier (+1.4%). The utility figure is a full year of average revenue. The state figure is one later month. A household that uses more than 571 kWh will not land on $114.60.
Two residential prices, on purpose
Eversource Massachusetts reported more than one residential service with a real customer count: 306,795 full service customers at 21.49¢; 968,061 delivery only customers at 20.06¢. Bundled customers buy supply and delivery together. Delivery customers buy supply from someone else. A single blended rate would describe neither bill.
Seasonal heat-pump distribution rate, plus a $20 million credit
Massachusetts Department of Public Utilities, D.P.U. 25-55. D.P.U. 25-55 approved residential seasonal heat-pump rates. From November 1, 2025, Eversource's base distribution heat-pump winter rate is $0.02052 per kWh, compared with $0.06264 per kWh on R-1. Winter transmission is also lower. The rate applies November 1 through April 30 to all usage for enrolled R-1 and R-2… The rate-case section has the full citation.
Season
Eversource Massachusetts customers average 571 kWh a month in the 2025 filing. Massachusetts households statewide averaged 596 kWh. Electric heat, a heat pump, or a cold snap sits well above a 12-month average, which is why a January bill and a May bill are not a rate case.
Data-center load is not a line on this bill
National electricity demand is rising, and EIA points to large computing facilities. No retrieved order isolates a data-center dollar on a Eversource Massachusetts residential account. That pass-through needs verification.
Needs verification
EIA-861 2025 and 2024 residential sales · Reviewed October 14, 2026
Rate cases and hikes
decided · D.P.U. 25-55
Seasonal heat-pump distribution rate, plus a $20 million credit
D.P.U. 25-55 approved residential seasonal heat-pump rates. From November 1, 2025, Eversource's base distribution heat-pump winter rate is $0.02052 per kWh, compared with $0.06264 per kWh on R-1. Winter transmission is also lower. The rate applies November 1 through April 30 to all usage for enrolled R-1 and R-2 heat-pump customers, including low-income rates. It is not a general rate hike.
The Massachusetts Attorney General announced a DPU-approved settlement under which NSTAR Electric customers receive a $20 million rate credit beginning January 1, 2026. A separate general base-rate order for 2025–2026 was not retrieved for Eversource in Connecticut or New Hampshire.
Massachusetts residential electric seasonal heat-pump rates (Massachusetts Department of Public Utilities) · Reviewed October 14, 2026
Assistance
LIHEAP is the federal bill program, and the state contact list is the place to start. A Eversource Massachusetts income discount, medical baseline, or budget-billing rule was not retrieved from Massachusetts Department of Public Utilities. That offer needs verification.
LIHEAP program · State and territory contacts · Eversource Massachusetts site
The company homepage is linked for navigation. Program rules on that site were not reviewed. Needs verification.
LIHEAP · Reviewed October 14, 2026
How to lower the bill
- Read the kilowatt-hours against this filing's average of 571 kWh a month. If your use is the thing that moved, the dollar total can rise on an unchanged rate.
- Add the supply line and the delivery line before you decide the bill is high. This page keeps those EIA rows apart so they are not blended.
- In Massachusetts, electric resistance heat dominates a winter bill. A heat-pump rate, where one is actually on the tariff, prices that usage differently from ordinary residential service. Confirm you are enrolled before you count on it.
- If the home heats with a heat pump, the Massachusetts seasonal heat-pump distribution rate is lower than standard residential service from November through April. Enrollment is required. The ordinary rate does not pick it up automatically.
- Start with LIHEAP for Massachusetts (https://www.acf.hhs.gov/ocs/map/liheap-map-state-and-territory-contact-listing). A Eversource Massachusetts discount beyond that program needs verification.
- If the read is marked estimated, the next actual read can true the account up or down. The tariff rule for that true-up needs verification.
Full service at the 2025 average price
| Monthly use | Estimated bill |
|---|---|
| 500 kWh | $107.45 |
| 750 kWh | $161.17 |
| 1,000 kWh | $214.90 |
| 1,500 kWh | $322.35 |
| 2,000 kWh | $429.80 |
Usage times the average price. At very low use, a real bill is often higher because a fixed customer charge does not shrink. The tariff needs verification.
Delivery only at the 2025 average price
| Monthly use | Estimated bill |
|---|---|
| 500 kWh | $100.30 |
| 750 kWh | $150.45 |
| 1,000 kWh | $200.60 |
| 1,500 kWh | $300.90 |
| 2,000 kWh | $401.20 |
Usage times the average price. At very low use, a real bill is often higher because a fixed customer charge does not shrink. The tariff needs verification.
Questions people ask
Why is my Eversource Massachusetts electric bill so high?
Eversource Massachusetts did not have one residential price in 2025. EIA keeps the service types separate. 306,795 full service customers averaged 21.49¢ per kWh and $101.86 a month; 968,061 delivery only customers averaged 20.06¢ per kWh and $114.60 a month. A blended average would describe neither bill. The legal name in the filing is NSTAR Electric Company. Massachusetts's 2025 statewide residential average was 30.41¢. July 2026 was 30.49¢, versus 30.07¢ in July 2025 (+1.4%). Compare each Eversource Massachusetts service type with those figures on its own. From 2024 to 2025, the average monthly bill for full service changed −25.7%. Average use changed +3.5% and average price changed −28.1%. Holding the 2024 price fixed, the usage change accounts for $4.74 a month. The price change, applied to 2025 usage, accounts for −$39.90.
What was Eversource Massachusetts's average residential rate?
Using 2025 EIA-861 revenue and sales, the delivery only average was 20.06¢ per kWh. Average use was 571 kWh a month and the average bill was $114.60. This folds in whatever customer charges and riders the utility reported. It is not the marginal rate on your tariff.
Did Eversource Massachusetts raise rates?
Massachusetts Department of Public Utilities D.P.U. 25-55 (decided): Seasonal heat-pump distribution rate, plus a $20 million credit. Separately, the EIA average price moved +23.3% from 2024 to 2025. The annual average and the docket are not the same document.
What bill assistance can Eversource Massachusetts customers ask about?
LIHEAP is the federal program for home energy bills (https://www.acf.hhs.gov/ocs/programs/liheap). Eversource Massachusetts may also offer an income-qualified discount, budget billing, or a medical baseline. The current offer, income cutoff, and how to apply need verification on the utility site and with the state LIHEAP office and Massachusetts Department of Public Utilities.
Are data centers why this bill went up?
Large computing load is raising U.S. electricity demand, and regulators can later recover new generation and wires costs from customers. EIA has not published a dollar line that isolates data centers on this utility's residential bill. That pass-through needs verification.