Texas Gas Service Rate Selection Guide
Texas Gas Service is a natural gas distribution utility and ONE Gas division serving roughly 711,000 customers across Texas. It offers an online portal with PDF statements and 13 months of billing history but has no smart-meter interval data, Green Button, EDI, or third-party data API. Rates are filed with the Railroad Commission of Texas and city regulators.
Texas Gas Service Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| 20-TGS / 2Z-TGS | Small Commercial Sales | Customer charge + per-CCF volumetric (see tariff PDF) | Smaller commercial accounts taking bundled gas sales service. |
| 25-TGS / 2Y-TGS | Large Commercial Sales | Customer charge + per-CCF volumetric (see tariff PDF) | Larger commercial accounts with higher monthly CCF volumes. |
| 30-TGS / 3Z-TGS | Industrial Sales | Customer charge + per-CCF volumetric (see tariff PDF) | Industrial gas sales loads. |
| T-1-TGS | Transportation Service | Per-CCF delivery charge; commodity bought separately | Large-volume C&I customers procuring their own gas supply. |
Market Overview
Texas natural gas distribution is regulated by the Railroad Commission of Texas for environs (outside-city-limits) areas and by individual municipalities for incorporated areas. Texas Gas Service files separate rate schedules for each. Typical C&I sales customers take bundled distribution service with no commodity choice, while large-volume customers can use Transportation Service to buy their own gas supply.
Need to pull your actual usage data to compare rates? See the Texas Gas Service Data Access Guide →
Current Rate Schedules
Texas Gas Service C&I sales rates are filed tariffs structured with a fixed monthly customer charge plus a volumetric charge per CCF (hundred cubic feet), layered with a monthly Cost of Gas adjustment, Weather Normalization Adjustment, GRIP capital surcharge, and pipeline-safety/integrity riders. Separate schedules apply to incorporated (Inc/IS) versus environs (Env/OS) areas. The current C&I sales schedules (20-TGS, 25-TGS, 30-TGS) carry an effective date of January 27, 2026. Exact per-CCF charges vary by service area and are published in each tariff PDF; this guide describes the rate structure and cites the official tariff book rather than asserting unverified dollar figures.
Effective: January 27, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Small Commercial Sales (20-TGS) | commercial | Smaller commercial gas sales customers in incorporated areas (Inc/IS); environs equivalent is 2Z-TGS. | Fixed monthly customer charge plus a volumetric charge per CCF, with monthly Cost of Gas, Weather Normalization, GRIP, and pipeline-safety adjustments. See tariff PDF for per-CCF figures. | — |
| Large Commercial Sales (25-TGS) | commercial | Larger commercial gas sales customers in incorporated areas (Inc/IS); environs equivalent is 2Y-TGS. | Fixed monthly customer charge plus volumetric per-CCF charge (typically lower unit rate than small commercial at higher volumes), plus standard riders/adjustments. See tariff PDF for per-CCF figures. | — |
| Industrial Sales (30-TGS) | industrial | Industrial gas sales customers in incorporated areas (Inc/IS); environs equivalent is 3Z-TGS. | Fixed monthly customer charge plus volumetric per-CCF charge for industrial-scale load, plus Cost of Gas and regulatory riders. See tariff PDF for per-CCF figures. | — |
| Transportation Service (T-1-TGS) | industrial | Large-volume C&I customers who buy gas commodity from a third party and use Texas Gas Service only for delivery (Inc/IS; environs is T-1-ENV-TGS). | Transportation (delivery) charge per CCF instead of a bundled commodity rate; customer procures its own gas supply. See tariff PDF for per-CCF transportation figures. | — |
| Cost of Gas Clause (1-INC-TGS) | commercial | All sales customers (Inc/IS); environs equivalent is 1-ENV-TGS. | Monthly pass-through adjustment reflecting the utility's actual cost of purchased gas, applied per CCF on top of the base sales rate. See tariff PDF for the current month's gas cost. | — |
Rate Recommendations by Use Case
Large industrial gas user
High-volume industrial customers should evaluate Transportation Service against bundled Industrial Sales.
At sufficient volume, procuring gas commodity from a marketer and paying only Texas Gas Service delivery can beat the bundled Cost of Gas pass-through, while the regulated delivery charge remains stable.
- Benchmark recent monthly CCF and commodity cost from your PDF bills.
- Request Transportation Service eligibility from business services.
- Compare marketer commodity quotes against the monthly Cost of Gas.
Multi-site commercial operator
Operators across multiple Texas communities should verify each site's rate class and area-specific tariff.
Texas Gas Service files separate incorporated vs environs schedules per community, and the small/large commercial split affects the per-CCF rate, so cross-site assignment should be checked.
- Download 13 months of PDF bills per site for benchmarking.
- Confirm small vs large commercial classification at each site.
- Check whether sites are Inc/IS or Env/OS for the correct tariff.
C&I customer needing usage data for reporting
Customers needing structured usage data for sustainability or energy reporting must plan for manual extraction.
Texas Gas Service offers no Green Button, API, or CSV export, so monthly CCF must be transcribed from PDF bills into a spreadsheet or platform.
- Enable E-Statements for consistent monthly PDFs.
- Build a recurring process to extract CCF and charges from each PDF.
- Retain bills locally, since only 13 months are visible online.
New or expanding facility in El Paso area
Facilities locating or expanding in eligible El Paso-area communities should explore the Economic Development Rate.
The EDR offers reduced rates for qualifying new or expanding C&I gas sales and transportation load in designated communities, lowering early-stage operating cost.
- Confirm the community is EDR-eligible (e.g., El Paso, Horizon City, Socorro).
- Apply via economic development before energizing service.
- Model EDR savings against standard Industrial Sales rates.
Historical Rate Trends
Texas Gas Service rates change through Railroad Commission and city rate cases, an annual GRIP (Gas Reliability Infrastructure Program) capital surcharge, and a monthly Cost of Gas adjustment that fluctuates with wholesale gas prices. The current C&I sales tariff schedules carry an effective date of January 27, 2026.
January 27, 2026
Current C&I sales tariff schedules (20-TGS, 25-TGS, 30-TGS) and related riders took effect.
n/aMarch 26, 2026
Pipeline Integrity Testing Rider and Pipeline Safety/Regulatory Program Fees updated.
n/aOverall trend: Generally rising base rates via periodic rate cases and annual GRIP surcharges; commodity component varies monthly with the Cost of Gas.
Next expected change: Periodic city/RRC rate cases and the next annual GRIP filing; the Cost of Gas adjustment updates monthly.
Cost Optimization Strategies
Because Texas Gas Service provides only monthly CCF data and prices C&I customers on a customer charge plus per-CCF volumetric structure with a commodity pass-through, optimization centers on reducing consumption, ensuring correct rate-class assignment, evaluating Transportation Service for large loads, and watching the monthly Cost of Gas and seasonal Weather Normalization Adjustment.
Verify correct rate-class assignment
For: All C&I gas sales customers
Confirm the account is on the right schedule (small vs large commercial vs industrial). Higher-volume accounts often qualify for a lower per-CCF rate class; misclassification can overcharge.
Evaluate Transportation Service
For: Large commercial and industrial customers with sufficient volume
Large-volume customers can move to Transportation Service (T-1-TGS) and buy gas commodity from a competitive marketer, paying only delivery to Texas Gas Service. This separates the (volatile) commodity cost from regulated delivery.
Reduce consumption and improve efficiency
For: All C&I gas customers
Since billing is purely volumetric per CCF plus a commodity pass-through, efficiency upgrades and process improvements directly cut the largest portion of the bill.
Track Cost of Gas and WNA seasonality
For: All C&I gas customers
Monitor the monthly Cost of Gas adjustment and the Weather Normalization Adjustment to anticipate winter bill swings and time discretionary gas use.
To implement these strategies, you need your 15-minute interval data. Learn how to download Texas Gas Service interval data →
Frequently Asked Questions
Can a commercial customer get interval or daily gas usage data from Texas Gas Service?▾
No. Texas Gas Service uses traditional monthly-read gas meters and has not deployed AMI. Commercial and industrial customers can see only monthly CCF consumption on their PDF bills; there is no hourly, daily, or 15-minute interval data.
Is there an API or Green Button feed for C&I energy data?▾
No. Texas Gas Service does not offer Green Button (DMD or CMD), an ESPI feed, a developer API, or EDI for customer data. The only access is first-party PDF download of monthly statements (13 months of history).
How can a consultant access a commercial client's gas data?▾
There is no formal third-party authorization program. The customer must log in, download their PDF bills, and share them. Data must then be manually extracted, since only PDF (no CSV/XML/JSON) is provided.
Which rate schedules apply to commercial and industrial gas customers?▾
C&I sales customers take Small Commercial Sales (20-TGS), Large Commercial Sales (25-TGS), or Industrial Sales (30-TGS), with separate incorporated (Inc/IS) and environs (Env/OS) versions. Large-volume customers may instead use Transportation Service (T-1-TGS) and buy their own gas commodity.
How are Texas Gas Service C&I rates set and how often do they change?▾
Rates are filed with the Railroad Commission of Texas (environs areas) and individual city councils (incorporated areas), plus annual GRIP capital surcharges and a monthly Cost of Gas adjustment. The current C&I sales schedules carry an effective date of January 27, 2026; the per-CCF figures are in each tariff PDF on the rate information page.
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