by season · plus $10.00 per month · covers delivery and default supply — delivery plus the utility's default supply; a customer who buys supply elsewhere pays the delivery part only
Provenance
sourceMassachusetts Electric Company, M.D.P.U. No. 1-26-H, Summary of Electric Delivery Service Rates
verifiedTranscribed from the utility's filed sheetMassachusetts Electric Company, M.D.P.U. No. 1-26-H, Summary of Electric Delivery Service Rates
verifiedEffective date on the sheet: 2026-08-01
verifiedSource document checked daily for changes
approximateThis is not a whole bill<strong class='warn'>delivery and default supply — delivery plus the utility's default supply; a customer who buys supply elsewhere pays the delivery part only
excludedTaxes, franchise fees and local surchargesJurisdiction-specific, so they are deliberately not encoded. A bill will be higher than this figure by that amount.
Energy rates
Period
Applies to
$/kWh
heat pump season, November 1 - April 30
all usage
$0.35275
standard delivery, May 1 - October 31
all usage
$0.39512
What this figure does and does not include
Transcription notes recorded when this tariff was encoded, including anything deliberately left out.
Massachusetts Electric Company, trading as National Grid. National Grid's other US electric utility is Niagara Mohawk in upstate New York, which files a separate tariff and is not encoded. The brand covers both.
MASSACHUSETTS IS RESTRUCTURED. The bill is delivery plus supply, and the supply half is substitutable: a customer may buy from a competitive supplier or a municipal aggregation instead of National Grid's Basic Service. These figures are the default-supply bill, the same shape as ComEd in Illinois.
Basic Service has a FIXED price option and a VARIABLE price option. The fixed option is encoded because it is the default; the variable option is reset monthly and ranges from 15.6c in September to 20.1c in January 2027 on the same filing.
The fixed supply term runs 1 August 2026 to 31 January 2027. It resets twice a year, on 1 February and 1 August, so this figure has a known expiry rather than an open-ended one.
THE UTILITY'S OWN RATES PAGE LINKS A SUPERSEDED FILING. The Service Rates page's newest Massachusetts Electric document is M.D.P.U. No. 1-26-G, effective 1 July 2026. It was cancelled by 1-26-H on 1 August, which is published only at an undated URL the page does not list. Encoding from the page's newest link gives supply 15.372c instead of 17.185c and delivery 22.933c instead of 22.327c - both wrong, both plausible.
The monitor therefore watches the evergreen tariff URLs, not the dated monthly archive, which lags by about a month.
EXCLUDED: the Farm Discount (10%) and the Low Income Discount, which is filed as a RANGE of 32% to 71% rather than a figure and cannot be resolved without knowing the customer's benefit tier.
EXCLUDED: Massachusetts state and local taxes.
A SEASONAL DELIVERY DISCOUNT, not a time-of-use plan. Qualifying heat pump customers pay a lower DISTRIBUTION rate from 1 November to 30 April - 18.090c against 22.327c - and the standard rate for the other six months. Nothing about the hour of use matters.
The saving is 4.237c/kWh across six months, which is about $250 a year for a household using 1,000 kWh a month in winter.
This is the first rate in the catalogue that varies by APPLIANCE rather than by geography, dwelling type, season of supply or hour. It is closest to DTE's electric-space-heat classes, but applied as a seasonal window rather than a separate rate class.
The winter window spans a supply-term boundary: the fixed Basic Service price encoded here runs to 31 January 2027, so February through April will be priced on a term not yet filed.
Think a figure here is wrong?
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with this plan's name and what the filed sheet says. Every rate on this page was
transcribed from the document linked above, so a report that quotes the sheet can
be checked against it and corrected.
Change history
The source document is fetched daily and every version is kept.
Utilities do not publish superseded rates, so this record does not exist
elsewhere once a rate changes.
No changes detected since monitoring began. The source sheet is checked daily.