kWhBill

U.S. Electricity Price Facts & Estimates

Texas Tariff Watch · a paid briefing by kWhBill

Texas Tariff Watch

Filing-level alerts for Texas electricity tariff and regulatory changes — before/after diffs, official sources, archived evidence. In your inbox within 48 hours.

Get the sample alert

Who it's for

  • Data-center site selection. Power cost is a line item in every site memo. A tariff revision rewrites your comparisons.
  • C&I energy procurement. Your supply contracts price off regulated delivery charges. A missed PUC filing means mispriced advice to your clients.
  • Energy regulatory practice. Docket deadlines are professional risk. A 48-hour safety net for the people watching filings.

How it works

  1. Monitor. PUC Texas rate-case dockets (Oncor, AEP Texas, CenterPoint…), utility tariff-book revisions, ERCOT large-load interconnection rule changes.
  2. Detect. Every filing captured with timestamp and SHA-256 hash, hash-chained so nothing is silently rewritten after the fact.
  3. Diff. Before/after on what actually changed: rates, effective dates, docket status flips.
  4. Alert. Email within 48 hours: what changed, who it hits, and source links — the docket, the tariff PDF, and an Internet Archive copy. Plus a monthly digest. Misses and false alarms are owned publicly in the email itself.

What triggers an alert

We alert on

  • Utility tariff filings, rate changes, and effective-date shifts (Oncor, CenterPoint, AEP Texas, Austin Energy…)
  • PUC Texas rate-case status flips — filed → approved, remand, withdrawal
  • ERCOT large-load interconnection rule changes

We don't alert on

  • General industry news
  • Rumors without a citable source
  • Changes effective more than 30 days ago

A recent catch

AEP Texas tariff book — new edition effective September 29, 2026.Captured September 30, 2026, the day after it took effect. The full before/after diff is published as Alert #001:

  • Rider DCRF (Ninth rev): down 14.4% across every rate class — residential $0.004277 → $0.003660/kWh.
  • Rider TCRF (Thirteenth rev): essentially flat (−0.2%) — residential $0.017233 → $0.017194/kWh.
  • These are the final rates from PUC Docket 58315, replacing interim rates that were subject to refund — a possible true-up for the March–September interim period is flagged in the alert.

This is the kind of catch subscribers hear about within 48 hours.

FAQ

How is this different from RTO Insider or energy newsletters?
They cover every ISO as news. We cover one state as filings: before/after diffs and evidence archives, not roundups.
What if nothing changes in a month?
Then the monthly digest says exactly that, with the docket watchlist status. Silence with receipts.
Who produces the alerts?
kWhBill's tariff monitoring pipeline. Every claim links to the docket, the tariff PDF, and an archived copy you can cite.
Can I cancel?
Anytime — no lock-in. One email and you're out.

Evidence boundary

Texas Tariff Watch tracks what is filed, not what is rumored. Alerts cite PUC Texas dockets, utility tariff books, and ERCOT publications — each captured with a timestamp and cryptographic hash. This is an information briefing assembled from public sources; it is not legal advice and not a procurement recommendation.