US utility rate data by zip
US residential electricity rates by zip, checked against each utility's own tariff sheet, with a verified or stale flag and the source row behind every number. Delivered as an API and a monthly file, with an alert when a rate changes.
Checked 2026-10-22 against the live federal database (OpenEI URDB) and the utility sources linked under the table. These are the rows a prospect gets for their own zips before paying anything.
| Zip | Utility and plan | Public figure (URDB) | Official sheet | In effect since |
|---|---|---|---|---|
| 02108 Boston | Eversource (NSTAR) R-1 Residential | $7.50 per month 9.591 c/kWh distribution effective Feb 1, 2026 | $10.00 per month 9.837 c/kWh distribution | Sept 1, 2026 |
| 78701 Austin | Austin Energy Residential, inside city | $15.00 per month tier 1 4.106 c/kWh effective May 1, 2025 | $17.35 per month tier 1 4.872 c/kWh (5.395 / 7.901 / 11.428) | Oct 1, 2026 |
| 94103 San Francisco | PG&E E-1 Residential | Mapped to SFPUC R-1, 2017: $3.60 per month tier 1 14.198 c/kWh | tier 1 32.561 c/kWh (tier 2 40.702) $0.79343 per day base charge (income tier 3) | June 1, 2026 |
Sources: Eversource, 2026 Summary of Eastern Massachusetts Electric Rates, R-1 customer charge and distribution energy charge, rates effective September 1, 2026 (PDF); URDB rate 6987eb77. Austin Energy, residential electric rates, approved tariff effective October 1, 2026 through September 30, 2027; URDB rate 68c078de. PG&E Schedule E-1, Advice 7921-E, effective June 1, 2026 (tariff sheet); the public database returns only the SFPUC schedule for 94103, URDB rate 5a382995. Boston figures are delivery charges; supply is billed separately.
In an 8-zip audit on October 20, 2026 (Boston, New York, Atlanta, Chicago, Austin, Phoenix, Los Angeles, San Francisco), 88 of 110 residential rows in the public database were more than a year old. Phoenix (APS R-TOU-E) matched its sheet; Boston, Austin and San Francisco did not.
Your setup guide asks each owner to type in their rate. Preset profiles by zip that stay current, so the dollar figure matches the bill.
Your plan picker needs the real TOU windows and prices. A stale window schedules the car into the peak.
Payback math starts from $/kWh. A 10% stale rate moves a 7-year payback by about 8 months, and the homeowner notices first.
A projected bill built on last year's rate misses the real one, and that is a support ticket.
Standard: $249 a month
All US utilities by zip, verified layer for the utilities you name, change feed and alerts, API and monthly file. Card link, or an invoice.
Design partner: $99 a month, locked for 12 months
The same product for the first five teams, in exchange for telling us which utilities to verify first and what the API should look like for your sync. Card link, or an invoice.
Sample first: reply with your zips and the file for them is free, with source rows, before you decide. Month to month, cancel any month, no setup fee.
Email the 3 to 5 zips (or utilities) your users are on. You get their rows, public vs official, with the source links, within one business day. No call, no form.
Send my zips to ops@maehwalabs.com
Every US electric utility in the federal rate database (3,000 or more, including co-ops and municipal utilities) is looked up by zip from day one as the public layer. The verified layer, checked monthly against the utility's own tariff sheet, starts with the utilities you name and grows from there. Residential plans first; small commercial on request. No Canada.
Two places, and you always see which: the public OpenEI Utility Rate Database (the figure most apps start from), and the utility's own tariff sheet or rate page, which is what we check each row against. Every value carries its source URL and effective date.
Each row carries a flag: verified (matches the utility sheet on the check date), stale (the public figure differs from the sheet, both values shown), or unchecked. In our 8-zip audit on October 20, 2026, 88 of 110 public rows were more than a year old. Where a sheet leaves something out (a supply rate that resets monthly, a tier limit that is not on the page) the row says unverified rather than guessing.
Utility tariffs are public filings and the federal database is public data. What you pay for is the checking: the verified values, the flags, the change feed and the source rows. You may use them inside your product and show them to your users. You may not resell the dataset or republish it as a database.
Your key and the first file for the utilities you name are ready within three business days of a yes. The sample for your zips comes first and costs nothing.