Duke Energy Kentucky Rate Selection Guide
Duke Energy Kentucky serves roughly 154,000 electric and 66,500 gas customers across Northern Kentucky as a regulated investor-owned utility under the Kentucky PSC. Its Business Experience portal provides 15-minute interval data downloads for C&I customers, though it does not offer Green Button or a public API.
Duke Energy Kentucky Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| Rate DS | Commercial (secondary) | $15-30/mo + $12.07/kW demand + ~7.1-12.3 cents/kWh tiered | General commercial under 500 kW |
| Rate DT | Industrial TOD (distribution) | $63.50-155/mo + $14.88-15.72/kW on-peak + ~5.3-6.3 cents/kWh | Demand 500 kW+ that can shift to off-peak |
| Rate DP | Industrial (primary) | $10.13/kW demand + ~6.6-7.6 cents/kWh | Customers taking primary voltage with own transformation |
| Rate TT | Industrial (transmission) | $8.39-10.23/kW on-peak + ~6.2-7.4 cents/kWh | Very large transmission-served loads |
Market Overview
Rates are approved by the Kentucky Public Service Commission. The most recent general rate case (2024-00354) produced new electric tariffs effective October 2, 2025. No competitive supplier choice exists in Kentucky.
Need to pull your actual usage data to compare rates? See the Duke Energy Kentucky Data Access Guide →
Current Rate Schedules
Duke Energy Kentucky's electric rates are set by the Kentucky PSC. The current tariff (Case No. 2024-00354) became effective October 2, 2025 following an approved ~9.6% revenue increase. C&I schedules below carry verified customer, demand, and energy charges from that tariff and are subject to Riders ESM, DSMR, FAC (fuel), and PSM.
Effective: October 2, 2025 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Rate DS - Service at Secondary Distribution Voltage | commercial | Commercial/general service at secondary voltage with average monthly demand under 500 kW; single point of delivery. | Customer Charge $15.00/mo single-phase, $30.00/mo three-phase. Demand: first 15 kW @ $0.00, additional kW @ $12.07/kW. Energy: first 6,000 kWh @ $0.123015, next 300 kWh/kW @ $0.082846, additional @ $0.071283 per kWh. Max rate (excl. customer charge) $0.331506/kWh. Plus Riders ESM, DSMR, FAC, PSM. | — |
| Rate DT - Time-of-Day Service at Distribution Voltage | industrial | Customers with average monthly demand of 500 kW or greater at distribution voltage (34.5 kV or lower); single point of delivery. | Customer Charge $63.50/mo single-phase, $127.00 three-phase, $155.00 primary voltage. Demand: Summer on-peak $15.72/kW, winter on-peak $14.88/kW, off-peak $1.41/kW, distribution $6.77/kW. Energy: summer on-peak $0.062936, winter on-peak $0.060540, off-peak $0.053385 per kWh. Plus riders. | — |
| Rate DP - Service at Primary Distribution Voltage | industrial | Commercial/industrial service taken at primary distribution voltage (customer owns transformation). | Demand: all kW @ $10.13/kW. Energy: first 300 kWh/kW @ $0.076294, additional @ $0.066112 per kWh. Power Factor / facilities charge $7.0422 per kW (Rider). Plus Riders ESM, DSMR, FAC, PSM. | — |
| Rate TT - Time-of-Day Service at Transmission Voltage | industrial | Very large customers served at transmission voltage. | Demand: summer on-peak $10.23/kW, winter on-peak $8.39/kW, off-peak $1.55/kW. Energy: summer on-peak $0.073558, winter on-peak $0.070736, off-peak $0.062297 per kWh. Facilities charge $5.2433 per kW (Rider). Plus riders. | — |
| Rider FAC - Fuel Adjustment Clause | commercial | All metered electric rate classes; passes through fuel cost variances. | Per-kWh fuel adjustment that varies monthly; published on Duke Energy's electric fuel cost adjustment page. Applied on top of base rates above. | — |
Rate Recommendations by Use Case
General commercial facility under 500 kW
Standard commercial loads under 500 kW at secondary voltage belong on Rate DS, where the first 15 kW of demand is free and tiered energy applies.
Rate DS fits sub-500 kW loads with modest demand exposure ($12.07/kW above 15 kW) and tiered energy declining to ~7.1 cents/kWh.
- Keep peak demand low to limit the $12.07/kW charge
- Export 15-minute CSV to find demand drivers
Demand 500 kW or greater, shiftable load
Facilities at 500 kW or greater move to Rate DT, where managing summer on-peak demand and shifting load to off-peak drives savings.
Rate DT's on-peak demand ($14.88-15.72/kW) and TOD energy reward peak shaving and off-peak operation.
- Reduce summer on-peak kW aggressively
- Shift batch/process loads to off-peak ($1.41/kW, ~5.3 cents/kWh)
- Use interval data to confirm peak windows
Customer able to take primary voltage
Customers that can own transformation and take primary voltage should evaluate Rate DP for lower demand and energy rates.
Rate DP's $10.13/kW demand and ~6.6-7.6 cents/kWh energy beat secondary pricing for qualifying loads.
- Weigh transformation ownership/maintenance cost vs. rate savings
- Confirm voltage availability with Duke Energy
Very large transmission-served load
The largest loads served at transmission voltage qualify for Rate TT, the lowest demand and energy rates.
Transmission service ($8.39-10.23/kW on-peak demand) offers the best unit pricing for very large customers.
- Engage a Duke Energy account representative early
- Model on-peak vs off-peak split to size savings
Historical Rate Trends
Duke Energy Kentucky's electric base rates are set by the Kentucky PSC. In the most recent general rate case (Case 2024-00354), Duke requested a ~15.4% increase ($70.0M) and the PSC approved a ~9.6% increase ($43.7M), with new tariffs effective October 2, 2025. Monthly bills also vary with the Fuel Adjustment Clause.
October 2, 2025
General rate case (Case 2024-00354): PSC approved ~9.6% electric revenue increase; new C&I tariff sheets effective.
+9.6%May 25, 2018
AMI deployment approved (Case 2016-00152), enabling 15-minute interval data access.
n/aOverall trend: Base rates increased ~9.6% in the 2024-00354 case; ongoing monthly variation via the Fuel Adjustment Clause and environmental surcharge.
Next expected change: No filed case pending; next change would follow a future PSC general rate case or rider adjustment.
Cost Optimization Strategies
C&I customers reduce cost by managing peak demand (especially on-peak under time-of-day schedules), selecting the correct voltage-based schedule, and using 15-minute interval data to target peaks.
On-peak demand management
For: Rate DT and Rate TT (500 kW+)
Shave on-peak kW under Rate DT/TT, where summer on-peak demand runs $15.72/kW and $10.23/kW respectively, far above off-peak.
Load shifting to off-peak
For: Time-of-day schedules (DT, TT)
Move flexible load to off-peak periods to capture off-peak energy (~5.3 cents/kWh) and $1.41/kW off-peak demand on DT.
Voltage / schedule optimization
For: Large C&I able to take higher voltage
Taking service at primary (Rate DP) or transmission (Rate TT) voltage lowers demand and energy rates for customers able to own transformation.
Interval data analysis
For: All C&I accounts
Export 15-minute CSV from the Business Experience portal to identify peak drivers and validate efficiency measures.
To implement these strategies, you need your 15-minute interval data. Learn how to download Duke Energy Kentucky interval data →
Frequently Asked Questions
How does our C&I facility download 15-minute interval data?▾
Log into the Business Experience portal, open Track & Manage Your Energy Costs, select View and download usage data, choose 15-minute increments and a date range, and export to CSV. There is no Green Button or API.
Can we give our energy consultant access to our usage data?▾
Yes. The primary account holder grants online account access (View-Only recommended) through the Business Experience portal's Manage Users feature; the consultant then downloads CSV data. Access can be revoked anytime.
Does Duke Energy Kentucky offer Green Button or an API?▾
No. Green Button (DMD/CMD) and official APIs are not available in Kentucky. The Business Experience portal CSV export is the primary machine-readable data path; EDI 810/820 is available for very large industrial accounts.
Can our business shop for a competitive electricity supplier?▾
No. Kentucky is a regulated, vertically integrated market with no retail choice. Duke Energy Kentucky's rates are set by the Kentucky Public Service Commission.
Which rate schedule applies to our commercial facility?▾
Rate DS (secondary distribution) applies under 500 kW average demand; Rate DT (time-of-day distribution) applies at 500 kW or greater; Rate DP serves primary-voltage service. All are in the current tariff (Case 2024-00354, effective Oct 2, 2025).
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