TNMP: delivery charges, service area, and outages

No. TNMP delivers electricity and maintains the poles, wires, and meters in its area, but it doesn't sell electricity to homes. You buy electricity from a retail electricity provider, which sends the bill and includes TNMP's delivery charges. Billing, payments, and starting or stopping service go through that provider.

No, despite its name. TNMP has served only Texas since its New Mexico customers moved to its sister utility, PNM, at the start of 2007. Both are owned by TXNM Energy.

In League City, Friendswood, Dickinson, Texas City, La Marque, Alvin, and West Columbia, most homes are on TNMP, and CenterPoint's tariff says it serves a minority of customers there. Both utilities also list Pearland. The street address decides it, so use the address check on this page. Both utilities have retail choice, but their delivery charges differ.

Both utilities list Lewisville, Princeton, Farmersville, and Celeste among the cities they serve. In West Texas, both list Wink and Wickett and serve parts of Pecos, Reeves, Ward, and Winkler counties. The street address decides it, so check the exact address. Both have retail choice, but their delivery charges differ.

Since September 2026, at $7.56 a month plus 7.7710¢ per kWh, TNMP's base residential delivery charge is the highest of the delivery utilities the PUCT lists, $85.27 in a 1,000 kWh month. Its fixed charge is the highest too, mostly because of its $5.86 metering charge. TNMP serves a market of mostly small towns spread across three separate regions, and it has attributed recent increases to customer and demand growth, new lines and substations, and its resiliency plan.

Yes, for one month. TNMP adds a surcharge of 1.569¢ per kWh in December 2026, about $15.69 in a 1,000 kWh month, to make up for under-billing while its new base rates were pending from May to September 2026 (Docket 59973). It ends after December. Most plans pass delivery charges through, so it can show up even on a fixed-rate plan.

Only if the problem turns out to be on your side. TNMP asks you to check your breakers first: when it sends a crew and finds its own equipment working, its tariff sets a service call charge of $128 on business days, $328 after hours and on weekends, and $490 on holidays. TNMP bills it to your provider, which can pass it on.

Blackstone Infrastructure has agreed to buy TXNM Energy, which owns TNMP. Texas regulators approved the deal in February 2026, with TNMP remaining a Texas-headquartered utility under PUCT regulation and customers getting $45.5 million in rate credits over four years after closing. It still needs New Mexico's approval, and TXNM expects it to close in the first half of 2027. Your provider and plan don't change either way.

Choose a plan from a retail provider and give it your service address and move-in date. The provider sends the start request to TNMP through ERCOT, so you don't need to contact TNMP yourself. TNMP's tariff has it connect service at an existing meter on the requested day when the order reaches it by 7 p.m. Central on any day except Sundays and holidays. A new meter needs the order by 5 p.m. on a business day, at least two business days ahead. Providers set their own order cutoffs and fees.

An ESI ID is the number that identifies the electric service point at your address. TNMP's start with 1040051, the code ERCOT uses for TNMP. You'll find yours on a recent electricity bill, TNMP gives it out by phone at 888-866-7456 on weekdays, and a provider can look it up from your address when you sign up.