Public Service Company of Oklahoma (PSO) Rate Selection Guide
Public Service Company of Oklahoma (PSO) is an AEP electric subsidiary serving about 575,000 customers across eastern and southwestern Oklahoma. PSO offers a customer portal, mobile app, and Green Button (Download My Data) interval-data exports, with third-party access handled through AEP's formal Letter of Authorization process.
Public Service Company of Oklahoma (PSO) Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| LUGS | commercial | $37.75/mo base + ~$0.071/kWh, no demand charge | Small, low-usage commercial sites |
| GS | commercial | $58.63/mo base + tiered energy (~$0.071/kWh first block) | General commercial / small industrial |
| PL | commercial | $76.15/mo base + $12.31/peak kW + $3.71/kW + ~$0.0588/kWh | Larger demand-metered commercial/industrial |
| LPL | industrial | $280/mo base + $7.05-$10.31/kW peak demand + low energy ($0.0017-$0.0031/kWh) | Large industrial primary/transmission loads |
Market Overview
PSO operates as a regulated monopoly under the Oklahoma Corporation Commission. There is no competitive retail energy supplier choice; generation, transmission, distribution, and supply are bundled and priced through OCC-approved tariffs.
Need to pull your actual usage data to compare rates? See the Public Service Company of Oklahoma (PSO) Data Access Guide →
Current Rate Schedules
PSO C&I customers are served under several Oklahoma Corporation Commission-approved schedules. General Service Secondary (GS), Power and Light Secondary (PL), and Large Power and Light (LPL) carry combinations of a fixed base service charge, demand (kW) charges, and tiered energy (kWh) charges, subject to fuel, tax, and metering rider adjustments. The figures below are from the PSO tariff book effective January 30, 2025 (OCC Order 746624, PUD 2023-000086).
Effective: January 30, 2025 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Limited Usage General Service Secondary (LUGS) | commercial | Small commercial/industrial customers on secondary service with limited usage. | Base service charge of $37.75/month (single-phase; $30.41 for 100 kWh-or-less single-phase) plus tiered energy charges (approximately $0.071/kWh for the first usage block). No demand charge. Subject to fuel, tax, and metering riders. | — |
| General Service Secondary (GS) | commercial | General commercial and small industrial customers on secondary distribution service. | Base service charge of $58.63/month plus tiered energy charges (first block approximately $0.071/kWh, declining for higher blocks). A time-of-day variant (GSTOD) is available. Subject to fuel, tax, and metering riders. | — |
| Power and Light Secondary (PL) | commercial | Larger commercial/industrial customers on secondary service with demand metering. | Base service charge of $76.15/month plus demand charges of $12.31 per peak billing kW and $3.71 per billing kW, with energy at approximately $0.058809/kWh. A time-of-day variant (PLTOD) is available. Subject to fuel, tax, and metering riders. | — |
| Large Power and Light (LPL) | industrial | Large industrial customers taking Transmission (rate code 242), Primary Substation (244), or Primary (246) service; written contract required. | Base service charge of $280.00/month. Peak Demand charge of $7.05/$9.29/$10.31 per kW and Maximum Demand charge of $2.47/$3.41/$4.26 per kW (Transmission/P-Substation/Primary). Energy charge of $0.001708/$0.002093/$0.003051 per kWh respectively, plus reactive power charges. On-peak period 2-9 p.m. weekdays June-September. | — |
| Primary Service Nondemand (PND) | commercial | Primary-voltage customers without demand metering. | Base service charge plus energy (kWh) charges; no demand charge. Specific rates per the PSO tariff book. | — |
Rate Recommendations by Use Case
General commercial facility
Take General Service Secondary and monitor usage via the portal and Green Button.
GS combines a modest $58.63 base charge with tiered energy rates suitable for general commercial loads without large demand.
- Consider GSTOD if load is shiftable
- Download Green Button data to confirm GS vs PL is optimal
Demand-metered commercial / small industrial
Use Power and Light Secondary and actively manage peak demand.
PL adds demand charges ($12.31/peak kW + $3.71/kW) but lower energy ($0.0588/kWh), favorable for higher-load-factor sites.
- Shave on-peak demand June-September
- Evaluate PLTOD for shiftable load
Large industrial / primary or transmission load
Take Large Power and Light at the highest feasible voltage and manage peak demand under the 90% ratchet.
LPL energy rates are very low ($0.0017-$0.0031/kWh) at transmission/primary voltage; demand charges ($7.05-$10.31/kW) and the ratchet make peak management critical.
- Target the June-September 2-9 p.m. on-peak window
- Negotiate the required written service contract
Energy consultant / aggregator needing C&I data
Collect interval data via customer Green Button download, falling back to the AEP Letter of Authorization for managed accounts.
Green Button ESPI XML is the fastest machine-readable path; the Letter of Authorization covers ongoing delegated access where the customer cannot self-serve.
- Have the customer export Green Button XML directly
- Submit authorizations to inforelease@aep.com and allow 5-10 business days
Historical Rate Trends
PSO rates are set through Oklahoma Corporation Commission rate cases and adjusted between cases by fuel and other riders. The current C&I tariff was authorized January 30, 2025 (OCC Order 746624, PUD 2023-000086), replacing the January 2024 schedule.
January 2, 2024
C&I rates authorized under OCC Order 738571 (PUD 2022-000093).
n/aJanuary 30, 2025
Current C&I tariff authorized under OCC Order 746624 (PUD 2023-000086), effective January 30, 2025.
n/aOverall trend: Successive OCC rate cases have increased base and demand charges, with upward pressure from grid investment and Oklahoma load growth (including data centers).
Next expected change: Future OCC rate case; riders adjust between cases.
Cost Optimization Strategies
PSO C&I customers save most by reducing peak demand (kW) during the June-September on-peak window, choosing the lowest-cost qualifying schedule, and taking service at higher voltage where energy rates are dramatically lower.
On-peak demand management
For: PL, LPL
Shift or curtail load during the 2-9 p.m. weekday on-peak period (June-September) to lower billing demand; note the 90% ratchet on LPL peak demand.
Voltage-level service selection
For: LPL
Where feasible, take Primary or Transmission service under LPL to capture much lower energy rates ($0.0017-$0.0031/kWh) versus secondary schedules.
Schedule optimization
For: All C&I
Compare LUGS/GS/PL/LPL and time-of-day variants against your load profile and demand to pick the lowest-cost qualifying schedule.
Green Button data analysis
For: All C&I with smart meter
Download Green Button interval data to identify peak drivers and verify the best rate schedule and demand-reduction opportunities.
To implement these strategies, you need your 15-minute interval data. Learn how to download Public Service Company of Oklahoma (PSO) interval data →
Frequently Asked Questions
Does PSO support Green Button for C&I interval data?▾
Yes. PSO offers Green Button Download My Data, a free on-demand ESPI XML export of interval consumption and billing data for the past 12-13 months. Connect My Data (automated OAuth) is not confirmed for PSO.
How does a consultant or aggregator get authorized access to our data?▾
Through AEP's Customer Letter of Authorization. The customer completes the form specifying scope, both parties sign, and it is submitted to inforelease@aep.com. After 5-10 business days the third party requests data via customer service; there is no automated third-party portal.
What commercial and industrial rate schedules does PSO offer?▾
C&I customers are served under General Service Secondary (GS), Power and Light Secondary (PL), Large Power and Light (LPL) for primary/transmission loads, plus time-of-day variants (GSTOD, PLTOD), Limited Usage General Service (LUGS), and Primary Service Nondemand (PND). See the PSO tariff book for current charges.
What is PSO's on-peak period for demand and TOU charges?▾
For Large Power and Light service, the on-peak period is 2:00 p.m. to 9:00 p.m. local time, Monday through Friday, June 1 through September 30 (excluding Juneteenth, Independence Day, and Labor Day).
Is interval data available at 15-minute granularity?▾
Hourly reads are standard via AMI, and some locations support 15- or 30-minute intervals. Large Power and Light demand is based on 30-minute integrated periods. Available granularity should be confirmed for a specific meter.
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