Massachusetts time-of-use hours by utility
Every Massachusetts electric utility we track with at least one active time-of-use rate plan, with peak and off-peak hours verified against the published tariff. Periods only — no price values.
Every TOU schedule on this page verified since
Utilities in Massachusetts
Sorted by number of customers served in Massachusetts.
No utilities match those filters.
Resolve any Massachusetts ZIP in one call.
Utility + current period + next transition.
FAQ's
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What are the typical time-of-use on-peak hours in Massachusetts?
Across the 4 TOU plans tou.tools tracks in Massachusetts, the most common on-peak window is 8 AM – 9 PM (1 plan); others run 10 AM – 10 PM and 3 PM – 8 PM. Every hour outside the on-peak (and any mid-peak) window is billed as off-peak. Exact boundaries vary by utility and plan — see each utility's schedule above.
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Which electric utilities in Massachusetts offer time-of-use rate plans?
tou.tools tracks 2 Massachusetts utilities with at least one active TOU rate plan — 4 active schedules in total. The largest by customers served are National Grid (Massachusetts) and Unitil. They span investor-owned utilities. The full list above is sorted by customers served.
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Do Massachusetts time-of-use peak hours apply on weekends?
It depends on the plan. Of the 4 TOU plans we track in Massachusetts, 1 apply on-peak periods every day including weekends, while 3 restrict on-peak to weekdays and treat weekends as off-peak. Many tariffs also treat observed holidays as off-peak; the Days column in each schedule above shows the exact rule.
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Do Massachusetts time-of-use hours change by season?
Not on the plans we track. All 4 TOU plans in Massachusetts keep the same period hours year-round. Each schedule above lists its exact season dates.
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When is the cheapest time to charge an EV in Massachusetts?
tou.tools tracks 2 EV-specific rate plans in Massachusetts (EV-RES and OPCR). On EV time-of-use plans the lowest-cost window is generally the overnight super-off-peak or off-peak period; charging then avoids the on-peak window. See the EV plan schedules for the exact hours.
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How do I find which Massachusetts utility serves a specific address or ZIP code?
tou.tools maps 381 Massachusetts ZIP codes to the utilities that serve them. Because service territories can overlap, a ZIP may return more than one candidate utility; supplying a full street address resolves it to a single utility via a geocoded point-in-territory lookup. The REST API and MCP server both return the matching utility and its current TOU period.