Switching Business Electricity Suppliers in Texas: The Process, Start to Finish

Say a Fort Worth warehouse pulls 35,000 kWh a month: on a supply contract priced at 10.2 cents/kWh, that's roughly $3,570 a month in energy charges. Move that same load to a contract priced at 8.4 cents/kWh and the bill drops to $2,940 a month, a $630 monthly difference, or $7,560 a year. Example numbers to show the math, not a live quote. For an operation running forklifts, dock lighting, and HVAC along the I-30 corridor, that difference is real money. Switching suppliers to capture that kind of gap is a paperwork process with a specific sequence, not a gamble, and getting the timing wrong is the only way it goes badly.

When you sign with a new supplier, that company files an enrollment tied to your ESI ID, the unique identifier ERCOT assigns to your meter. ERCOT validates the request and notifies your TDU, whether that's Oncor in Dallas or Fort Worth, CenterPoint in Houston, AEP Texas along the coast and West Texas, or TNMP in scattered pockets statewide. None of this touches a wire, a transformer, or the meter itself. The TDU owns and operates the physical grid regardless of which retail supplier is billing you, so reliability never changes with a switch. Your lights don't blink because the company reading your usage isn't the company keeping the poles standing.

Timing is the part of switching business electricity suppliers in Texas that's easiest to get wrong. A new contract that starts before the old one ends usually triggers an early termination fee on top of whatever you're paying the new supplier, so you're covering two contracts at once for no reason. A new contract that starts too late lets the account slip past expiration and roll onto a month-to-month variable rate, which almost always prices above your old fixed rate. The fix is straightforward: line up the new contract's start date with your current contract's exact expiration date, confirmed off your most recent bill, not a guess.

• Pull the exact contract end date and any early termination fee language off your current supplier's contract, not the bill summary.
• Gather 12 months of usage history by ESI ID; suppliers price commercial bids off historical load, not a single month.
• Get competing bids from PUCT-registered suppliers for the same term length so you're comparing apples to apples.
• Sign the new contract with a start date matched to the old contract's expiration, confirmed in writing.
• The new supplier files the ERCOT enrollment tied to your ESI ID ahead of the scheduled meter read.
• The TDU keeps delivering power straight through the switch; your first bill from the new supplier reflects usage from the new start date forward.

Two documents matter most. The first is a Letter of Authorization, which gives your broker or the new supplier permission to pull your usage history and account details from your current supplier or TDU. The second is the supply contract itself, which spells out the rate, the term length, the ESI IDs covered, and the start and end dates. If your account is interval-metered (usually a load over 200 kW, our estimate, not a published statistic), expect the supplier to ask for 12 months of 15-minute interval data before quoting; that's what lets them price demand charges accurately instead of padding the rate to cover unknowns.

• A recent bill or ESI ID list for every meter you want quoted
• A signed Letter of Authorization
• 12 months of usage history (interval data if the account is demand-metered)
• Business EIN or a completed W-9
• A credit application or deposit, which some suppliers require for new businesses or accounts with limited payment history