Duke Energy Indiana, LLC Rate Selection Guide
Duke Energy Indiana is an investor-owned electric utility serving more than 909,000 customers across 69 Indiana counties. For commercial and industrial accounts, Duke provides 15-minute interval data and CSV/Excel downloads through its Business Account portal with user-management-based third-party sharing. Indiana is a fully regulated, vertically integrated market — there is no retail-supplier choice, and rates are set by the Indiana Utility Regulatory Commission (IURC).
Duke Energy Indiana, LLC Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| General Service | commercial | Customer charge + per-kWh energy (+ demand above thresholds), bundled | Small commercial accounts |
| Rate LLF | commercial | Customer charge + per-kW demand + per-kWh energy, bundled | Lower-load-factor C&I light & power |
| Rate HLF | industrial | Customer charge + per-kW demand + per-kWh energy; favorable to steady high load | High-load-factor industrial facilities (~35%+) |
| Large Power / Primary | industrial | Customer charge + contract/billing demand + per-kWh energy | Very large loads at primary/transmission voltage |
Market Overview
Indiana operates a fully regulated, vertically integrated electricity market. Duke Energy Indiana is the monopoly distribution utility and retail supplier, and there is no certified-supplier or retail-choice program. All rates are bundled and set by the IURC through base rate cases and trackers (e.g., fuel adjustment, environmental, AMI riders).
Need to pull your actual usage data to compare rates? See the Duke Energy Indiana, LLC Data Access Guide →
Current Rate Schedules
Duke Energy Indiana C&I rates are bundled (generation + transmission + distribution) and set by the IURC. Commercial and industrial customers are served under general-service and load-factor-based schedules — notably Rate LLF (Low Load Factor) and Rate HLF (High Load Factor) — plus large-power and outdoor-lighting schedules, with optional time-of-use riders introduced in 2025. Specific per-kWh and per-kW figures are set in the tariff approved under IURC Cause No. 46038; verified bill-impact figures from that order are reflected below, while individual schedule rates should be confirmed in Duke's Indiana electric tariff book.
Effective: February 27, 2025 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| General Service (Small Commercial) | commercial | Small commercial accounts with relatively low demand. | Monthly customer charge plus per-kWh energy charge; demand charges apply above defined thresholds. Bundled generation + delivery. | Per-kWh energy and customer charges per Duke Indiana electric tariff (IURC Cause No. 46038).+ Applies above defined demand thresholds; see tariff |
| Rate LLF — Low Load Factor Service | commercial | Commercial/industrial light-and-power accounts with lower load factor at secondary service. | Monthly customer charge, per-kW demand charge, and per-kWh energy charge; bundled. Optional TOU rider available. | Demand and energy charges per Duke Indiana electric tariff (IURC Cause No. 46038).+ Per-kW demand charge per tariff |
| Rate HLF — High Load Factor Service | industrial | Industrial accounts with high, steady load (roughly 250+ hours use/month, ~35% load factor); available at secondary and primary voltage with optional TOU. | Monthly customer charge, per-kW demand charge, and per-kWh energy charge; demand-side-management participation supported for on-/off-peak load shifting. Bundled. | Demand and energy charges per Duke Indiana electric tariff (IURC Cause No. 46038); confirm in tariff book.+ Per-kW demand charge per tariff (lower energy rate reflects high load factor) |
| Large Power / Primary Service | industrial | Very large industrial loads taking service at primary or transmission voltage. | Monthly customer charge plus contract/billing demand charge and per-kWh energy; lower per-unit charges at higher voltage. Bundled. | Per Duke Indiana electric tariff (IURC Cause No. 46038).+ Contract/billing demand charge per tariff |
| Optional Time-of-Use (Business) Rider | commercial | Business customers electing time-of-use pricing introduced for Indiana in 2025. | On-peak / off-peak energy pricing layered onto the underlying schedule to reward off-peak consumption. | On-/off-peak energy rates per the 2025 Indiana TOU tariff.+ Per underlying schedule |
Rate Recommendations by Use Case
High-load-factor industrial facility
Steady, high-utilization industrial plants should evaluate Rate HLF and primary-voltage service, then manage demand peaks.
HLF rewards high, steady load, and higher-voltage service plus demand management lowers the per-kW and blended cost.
- Export 15-min interval data to verify load factor before switching schedules
- Evaluate primary-voltage service where feasible
- Enroll in SavingsOnDemand to monetize curtailment
Mid-size commercial business
General commercial accounts should confirm LLF vs. general-service fit and consider the 2025 optional TOU rates.
Most commercial load fits general service or LLF; TOU can help businesses that can shift load off-peak.
- Use portal interval data to assess load factor and peak timing
- Model the 2025 TOU rider against your load shape
- Set usage alerts to catch demand spikes
Multi-site portfolio / energy manager
Portfolios should lean on scheduled CSV/Excel report delivery and portal shared access since there is no API or Green Button in Indiana.
Automated portal reports and user-management sharing are the only scalable data paths in Indiana's regulated, no-API environment.
- Configure scheduled interval-data reports per account
- Invite analysts/vendors via portal User Management
- Use Nectar's API for multi-utility consolidation — see docs.nectarclimate.com
Historical Rate Trends
Duke Energy Indiana base rates are reset through IURC rate cases. The most recent major case, Cause No. 46038, was decided January 29, 2025, authorizing roughly $295.7 million in additional annual revenue — well below Duke's original request of about $492 million (a requested ~16.2% increase).
February 27, 2025
First step of the IURC Cause No. 46038 base rate increase — approximately 8% — funding grid investment and operations.
~+8%January 1, 2026
Second step of the IURC Cause No. 46038 increase — approximately 3% — phased in early 2026 (total ~11% across both steps).
~+3%Overall trend: Increasing — an ~11% average bill increase phased in two steps under the 2024 rate case.
Next expected change: The second step of the Cause No. 46038 increase (~3%) takes effect in early 2026, following the ~8% first step on February 27, 2025.
Cost Optimization Strategies
In regulated Indiana, C&I customers cannot shop supply, so cost optimization centers on rate-schedule fit, demand management, voltage level, and program participation. Interval data from the Business portal is the foundation for all of these.
Rate-Schedule Optimization (LLF vs. HLF)
For: All C&I accounts
Match the schedule to your load factor — high, steady loads typically benefit from Rate HLF, while lower-load-factor accounts may fare better on LLF/general service.
Peak Demand Management
For: Demand-metered C&I accounts
Use 15-minute interval exports to find and shave demand peaks that set the per-kW demand charge.
Demand Response (SavingsOnDemand)
For: Business customers able to curtail load
Enroll in SavingsOnDemand to earn payments for curtailing load during peak/emergency events.
Time-of-Use Load Shifting
For: Business customers with flexible load
Adopt the 2025 optional business TOU rates and shift flexible load to off-peak hours.
To implement these strategies, you need your 15-minute interval data. Learn how to download Duke Energy Indiana, LLC interval data →
Frequently Asked Questions
How does a C&I customer get 15-minute interval data from Duke Energy Indiana?▾
Business customers log in to the Business Experience portal, open the Energy Usage / Reports section, select 15-minute granularity and a date range, and export to CSV or Excel. You can also schedule recurring interval-data reports to be emailed automatically. There is no Green Button Connect or public API in Indiana.
How can I give an energy consultant access to my Duke Energy Indiana data?▾
Use portal User Management (Shared Access): the primary account holder invites the consultant by email, selects which accounts they can see, and sets permission level (usage only, usage + billing, or full). The consultant activates an account and downloads the authorized data. Alternatively, submit a signed authorization letter to Business Customer Service.
Is there a Green Button or developer API for Indiana?▾
No. Duke Energy Indiana has not implemented Green Button Connect My Data and offers no official developer API. The former Gateway pilot and community integrations were retired in June 2023. Programmatic access today is via portal exports and scheduled reports; third-party rate data is available through the kwcost API.
Can I shop for a competitive electricity supplier in Indiana?▾
No. Indiana is a regulated, vertically integrated market with no retail electric choice. Duke Energy Indiana is the sole distribution utility and retail supplier, and all rates are set by the IURC. C&I customers optimize cost through rate-schedule selection, demand management, demand response, and renewable programs rather than supplier shopping.
Which rate schedule applies to a large industrial facility?▾
Large facilities typically take Rate HLF (High Load Factor) service, while general commercial accounts use general-service/LLF schedules; very large loads may qualify for large-power schedules. The applicable schedule depends on load factor, demand, and voltage. Consult Duke's Indiana electric tariff and your account manager to confirm the optimal classification.
Automate Duke Energy Indiana, LLC Rate Analysis with Nectar
Nectar continuously monitors your Duke Energy Indiana, LLC rate options and alerts you when a better schedule is available. Save 10-30% on energy costs.
Nectar for Energy & Sustainability Teams
Managing utility costs for commercial or industrial buildings? Nectar offers a free rate analysis — we'll review your current rate schedules and identify where switching tariffs or shifting load can save 10-30%.
Get a Free Rate AnalysisNectar for Energy Brokers & Consultants
Advising clients on rate optimization? Nectar works with energy consultants who need reliable interval data and automated rate comparison tools.
Partner with Us