Piedmont Natural Gas Rate Selection Guide
Piedmont Natural Gas is a Duke Energy subsidiary serving more than 422,000 natural gas customers across North Carolina, South Carolina, and Tennessee. Commercial and industrial customers can access billing data online, retrieve billing and interval data programmatically through Nectar (docs.nectarclimate.com), and manage transportation and nominations through Duke Energy's GTIS platform.
Piedmont Natural Gas Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| Rate 102 | Commercial | Facilities charge + seasonal per-therm (per NC schedules) | Small commercial firm sales |
| Rate 152 | Commercial | Facilities charge + seasonal per-therm (per NC schedules) | Medium commercial firm sales |
| Rate 113 | Industrial | $1.39435/therm demand (eff. 10/1/2025) | Large transportation customers supplying their own gas |
| Rates 213-214 | Industrial | Transportation/delivery charges (per tariff) | Industrial transportation with balancing |
Market Overview
Piedmont Natural Gas is a regulated local distribution company. Bundled sales rates and transportation/delivery rates are approved by state utilities commissions (NCUC, SCPSC, TPUC). Residential and most commercial customers buy bundled gas from Piedmont; large industrial/transportation customers can arrange their own gas supply and pay Piedmont for delivery.
Need to pull your actual usage data to compare rates? See the Piedmont Natural Gas Data Access Guide →
Current Rate Schedules
Piedmont's North Carolina rates are filed with the NCUC under Docket G-9 and adjusted periodically. North Carolina firm sales rates were updated effective October 1, 2025; rates combine a fixed monthly facilities charge with a per-therm commodity/delivery charge, and rates vary by winter (November-March) and summer seasons. Large-volume customers are served under transportation schedules with demand-style charges. Verified figure: the Rate 113 (Large General Transportation Service) demand charge is $1.39435 per therm effective 10/1/2025. Other per-therm figures vary by schedule and season; consult the filed NC rate schedules for exact values.
Effective: October 1, 2025 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Rate 102 - Small General Service | commercial | Small commercial firm sales customers in North Carolina. | Fixed monthly facilities charge plus a seasonal per-therm commodity/delivery charge (winter rates Nov-Mar). Exact per-therm rates are set in the NC schedules filed under Docket G-9; not independently verified here. | — |
| Rate 152 - Medium General Service | commercial | Medium-volume commercial firm sales customers in North Carolina. | Fixed monthly facilities charge plus a seasonal per-therm commodity/delivery charge. Per-therm rates per the filed NC schedules; not independently verified here. | — |
| Rate 113 - Large General Transportation Service | industrial | Large-volume firm transportation customers in North Carolina who arrange their own gas supply and use Piedmont for delivery. | Demand-style delivery charge. Verified: demand charge of $1.39435 per therm effective 10/1/2025, per the NC rate schedules. | — |
| Rates 213-214 - Transportation Services | industrial | Industrial and large commercial transportation customers (interruptible/firm transportation). | Delivery/transportation charges with balancing and cash-out provisions. Specific charges per the filed tariff schedules; structure described qualitatively here. | — |
| SC Rate 207 - Balancing, Cash-Out & Agency Authorization | industrial | South Carolina transportation customers and their agents. | Defines balancing, cash-out, and agency authorization terms for transportation service in SC. Filed in the SC PSC eTariff system. | — |
Rate Recommendations by Use Case
Small commercial firm gas account
A small commercial customer on bundled firm sales who wants simple billing and data access.
Rate 102 fits small-volume firm sales with a fixed facilities charge and seasonal per-therm commodity/delivery rate, avoiding the supply-management burden of transportation service.
- Enroll in eBill and pull 12 months of PDFs for budgeting
- Use the Apogee bill analysis tool to track seasonal usage
Mid-size commercial facility
A medium-volume commercial facility evaluating its rate class.
Rate 152 covers medium-volume firm sales; once annual volumes are large enough, compare against transportation service.
- Track annual therms to know when transportation becomes economical
- Reduce winter peak load to limit exposure to higher winter rates
Large industrial transportation customer
A high-volume industrial site that can procure its own gas supply.
Transportation service lets large users buy gas in the wholesale market and pay Piedmont only for delivery (Rate 113 demand charge $1.39435/therm, eff. 10/1/2025), which can beat bundled commodity costs when managed well.
- Engage a marketer/broker via GTIS for supply and nominations
- Tune nominations to avoid imbalance cash-out charges
- Model demand charge against expected throughput
Energy manager / consultant
A consultant managing multiple Piedmont C&I accounts.
Centralize data via Nectar and GetMyInvoices, and use GTIS for transportation accounts to standardize nominations and reporting across a portfolio.
- Automate invoice retrieval with GetMyInvoices
- Use Nectar's API (docs.nectarclimate.com) for billing and interval data across sites
- Apply as a GTIS trading partner for transportation portfolios
Historical Rate Trends
Piedmont files periodic rate adjustments with the NCUC under Docket G-9. North Carolina firm sales rates were updated effective October 1, 2025. In 2024 Piedmont reached a North Carolina rate case agreement with consumer and industrial groups, reflecting recovery of capital investment in the distribution system.
October 1, 2025
North Carolina firm sales and transportation rates updated; Rate 113 demand charge set at $1.39435/therm.
n/aSeptember 1, 2024
Piedmont reached a North Carolina rate case agreement with key consumer and industrial groups for recovery of capital investment.
n/aOverall trend: Generally upward, driven by capital investment recovery and commodity cost pass-through, partly offset by seasonal commodity declines.
Next expected change: Subject to future NCUC rate filings under Docket G-9; commodity adjustments occur periodically.
Cost Optimization Strategies
For C&I gas customers, the largest savings opportunities come from selecting the right rate class, managing seasonal load, and managing transportation supply and balancing.
Evaluate transportation vs. bundled sales
For: Large commercial & industrial
Large-volume customers can switch from bundled firm sales (Rates 102/152) to transportation service (Rates 113/213/214), procuring their own gas supply and paying Piedmont a delivery/demand charge. This can lower commodity cost but requires managing supply and balancing.
Manage winter load
For: Commercial & industrial
Winter per-therm rates (Nov-Mar) are higher than summer. Shifting discretionary process load or improving building/process efficiency reduces exposure to peak-season pricing.
Optimize nominations and balancing
For: Large transportation customers, brokers
Transportation customers and their agents should tune daily/monthly nominations through GTIS to minimize imbalance and cash-out penalties.
Use interval data for budgeting
For: Commercial & industrial
Pull gas billing and interval data via Nectar (docs.nectarclimate.com) and bill analysis via Apogee to forecast usage and validate billed quantities.
To implement these strategies, you need your 15-minute interval data. Learn how to download Piedmont Natural Gas interval data →
Frequently Asked Questions
How can a commercial or industrial customer get interval gas usage data from Piedmont?▾
Piedmont does not provide a first-party interval data feed or Green Button export. C&I customers and their consultants can obtain gas interval and billing data through Nectar's API with customer authorization, where the meter is supported — see docs.nectarclimate.com.
Does Piedmont support EDI for business customers?▾
Yes. Piedmont supports EDI/EFT for business customers, primarily through Duke Energy's GTIS platform for large C&I accounts, marketers, and brokers. ANSI X12 transactions such as 814, 820, and 867 are used for nominations, balancing, and remittance.
How does a third party access a C&I customer's billing data?▾
With written customer authorization, a third party can use Nectar (docs.nectarclimate.com) to programmatically retrieve billing data, use GetMyInvoices to automatically retrieve bills, or contact Piedmont at 1-800-752-7504 to be added as an authorized agent on the account.
Which rate schedule applies to a commercial natural gas account in North Carolina?▾
Small and medium commercial firm sales are served under Rates 102 and 152, while large-volume firm and transportation customers are served under transportation schedules such as Rate 113. Applicability depends on annual volume; see Piedmont's NC rate schedules filed under NCUC Docket G-9.
How do brokers or marketers manage transportation and nominations?▾
Qualified brokers, marketers, and agents apply as GTIS trading partners, execute agency authorization agreements per state, and submit daily/monthly nominations and view balancing through the GTIS online portal.
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