Citizens Energy Group Rate Selection Guide
Citizens Energy Group is a public charitable trust serving the Indianapolis area with natural gas, water, steam, and chilled water. Built on Oracle Utilities C2M, it offers billing and interval data via the My Account and Citizens EnerLink (CEL) portals, CSV/ESPI exports, EDI for gas suppliers, and a Citizens Energy Select gas choice program.
Citizens Energy Group Rate Schedule Comparison
| Schedule | Type | Rate | Best For |
|---|---|---|---|
| D3 — General Non-Heating | commercial | Service charge + $/therm delivery | Businesses using gas for process only |
| D4 — General Heating | commercial | Service charge + $/therm delivery | Businesses using gas for space heating and process |
| D5 — Large Volume | industrial | Service charge + large-volume delivery | Industrial sites ≥ 300,000 therms/year |
| D9 — High Load | industrial | Service charge + high-load delivery | Very large, high-load-factor industrial loads |
Market Overview
Citizens is an IURC-regulated public charitable trust providing monopoly delivery service. The Citizens Energy Select program allows eligible C&I customers to choose a third-party natural gas supplier while Citizens provides delivery. Eligible Marion County rate classes: D3, D4, D5 (existing third-party), D7, D9; Westfield: D30, D40, D50.
Need to pull your actual usage data to compare rates? See the Citizens Energy Group Data Access Guide →
Current Rate Schedules
Citizens natural gas delivery rates for commercial and industrial customers are set in IURC-approved tariff schedules (Gas Rate Nos. D3, D4, D5, D7, D9 in Marion County). Each schedule includes a monthly service charge plus volumetric delivery charges, with gas commodity supplied either by Citizens (Rate S1 variable supply) or a third-party supplier under Citizens Energy Select. Schedule names and applicability below are verified from the Citizens tariff page; specific per-therm dollar amounts are filed in the linked rate documents and were not asserted here because exact current figures were not extractable from a retrievable source at research time.
Effective: June 4, 2026 · Full Tariff Book →
| Schedule | Type | Applicability | Structure | Rate |
|---|---|---|---|---|
| Gas Rate No. D3 — General Non-Heating Delivery Service | commercial | Gas delivered for non-heating (process) purposes for a single end-use customer through one meter at a single premise. | Monthly service charge plus volumetric ($/therm) delivery charge. Commodity via Rate S1 or third-party supplier. | — |
| Gas Rate No. D4 — General Heating Delivery Service | commercial | Gas delivered for heating purposes for a single end-use customer through one meter at a single premise. | Monthly service charge plus volumetric ($/therm) delivery charge; seasonal usage. Commodity via Rate S1 or supplier. | — |
| Gas Rate No. D5 — Large Volume Delivery Service | industrial | Single end-use customer using a minimum of 300,000 therms in the prior 12 months (or expected) through one or more meters at a single premise. | Service charge plus large-volume delivery charge; commodity via supplier or Citizens. Eligible for Citizens Energy Select. | — |
| Gas Rate No. D7 — Compressed Natural Gas (CNG) Delivery Service | commercial | Gas delivered solely for conversion to CNG for fueling motorized vehicles, single meter, single premise. | Service charge plus volumetric delivery charge specific to CNG fueling use. | — |
| Gas Rate No. D9 — High Load Delivery Service | industrial | Single end-use customer using a minimum of 2,000,000 therms with load factor greater than 50% in the prior 12 months (or expected), one or more meters at a single premise. | Service charge plus high-load-factor delivery charge; commodity via supplier or Citizens. Eligible for Citizens Energy Select. | — |
Rate Recommendations by Use Case
Mid-size commercial gas customer
Offices, schools, and retail using gas for heating/process should confirm rate class and consider supplier choice.
D3 (process) vs. D4 (heating) selection and Citizens Energy Select eligibility drive the controllable cost.
- Verify D3 vs. D4 classification
- Compare Energy Select suppliers to Rate S1
- Export CSV usage from My Account / CEL
Large industrial gas user (≥ 300,000 therms)
High-volume sites should pursue D5/D9 eligibility and active commodity procurement via Citizens Energy Select.
Large-volume and high-load-factor schedules plus supplier choice materially reduce delivered cost.
- Confirm 300,000+ (D5) or 2,000,000+ therm / greater than 50% load factor (D9) eligibility
- Enroll with an approved third-party supplier
- Tighten nominations using CEL interval data
Third-party gas supplier
Suppliers entering Citizens Energy Select gain CEL portal access and use EDI for transactions.
Approved suppliers receive CEL credentials and exchange 867/854/810/814 via EDI for the customer group.
- Complete supplier qualification (Purchasingportal@citizensenergygroup.com)
- Set up EDI trading partner (VAN or SFTP)
- Use CEL to view customer interval data and imbalances
Multi-site portfolio / energy consultant
Consultants should use CSV exports plus Nectar's API for scalable Citizens data access.
No public utility API exists; Nectar covers Citizens (docs.nectarclimate.com) and CSV exports support automation.
- Collect customer authorizations
- Use Nectar's API where available — see docs.nectarclimate.com
- Establish a Key Account Coordinator relationship for 10+ accounts
Sustainability / ESG reporting
Facilities teams reporting Scope 1 gas emissions should pull interval/usage data for accurate accounting.
Interval and monthly therm data support granular emissions accounting.
- Export 12+ months of CEL/My Account usage
- Apply natural gas emissions factors to therms
- Automate monthly CSV pulls
Historical Rate Trends
Citizens gas rates are adjusted through IURC rate cases (e.g., Cause No. 45151 base rates) and quarterly Gas Cost Adjustment (GCA) filings that pass through the cost of the gas commodity. Delivery rates change via formal rate cases; commodity costs vary with the market.
July 1, 2020
Oracle Utilities C2M go-live and CEL platform launch supporting new billing and interval data access.
n/aJanuary 1, 2019
Base rates set pursuant to IURC Order in Cause No. 45151.
n/aOverall trend: Delivery rates relatively stable between rate cases; commodity costs vary with the gas market.
Next expected change: Periodic IURC rate case; quarterly GCA adjustments continue.
Cost Optimization Strategies
For C&I gas customers, optimization centers on selecting the right rate class, evaluating supplier choice for the commodity, and managing nominations/balancing to avoid imbalance penalties.
Rate class verification
For: All C&I gas accounts
Confirm the account is on the lowest-cost eligible rate (D3/D4 vs. large-volume D5/D9) based on annual therms and load factor.
Gas commodity choice
For: Eligible D3, D4, D5, D7, D9 accounts
Evaluate Citizens Energy Select third-party suppliers against Citizens' Rate S1 variable supply for the commodity portion of the bill.
Nomination & balancing management
For: Supplier-served and large accounts
Use CEL interval data to tighten daily nominations and avoid imbalance and non-performance charges (Rate A2/A3/A4).
Interval data analytics
For: CEL-enabled C&I/thermal accounts
Export 60-minute/daily CEL data to identify usage patterns and efficiency opportunities.
To implement these strategies, you need your 15-minute interval data. Learn how to download Citizens Energy Group interval data →
Deregulated Market Shopping
Through Citizens Energy Select, eligible commercial and industrial customers can purchase natural gas supply from an approved third-party supplier while Citizens continues to deliver the gas. Delivery charges remain regulated; only the gas commodity is competitive. This is a gas transportation/choice program, not full retail deregulation.
How to Compare Citizens Energy Group Suppliers
- 01Confirm your account is in an eligible rate class (Marion County: D3, D4, D5, D7, D9; Westfield: D30, D40, D50)
- 02Select from Citizens-approved third-party gas suppliers
- 03Complete a Gas Delivery Service Agreement specifying delivery option (Standard or Basic)
- 04Provide 21+ days notice before the switch date
Contract Terms for Citizens Energy Group Supply Agreements
- Supplier-set commodity pricing and term
- Standard vs. Basic delivery service options
- Supply nominations and balancing managed by the supplier
- Return to Citizens supply (Rate S1/S3) available per program rules
Common Pitfalls When Shopping Citizens Energy Group Rates
- Eligibility limited to specific C&I rate classes
- 21+ day advance notice required to switch
- Imbalance and non-performance charges (Rate A2/A3/A4) may apply
- Delivery charges remain regulated and unchanged
Frequently Asked Questions
Does Citizens Energy Group offer interval data for commercial accounts?▾
Yes. Through the Citizens EnerLink (CEL) platform, eligible commercial, industrial, and thermal accounts can view and download interval consumption at 60-minute or daily granularity for gas (5-minute for steam) and export it as CSV.
Can my business choose its natural gas supplier?▾
Yes, for eligible rate classes. The Citizens Energy Select program lets C&I customers in Marion County (D3, D4, D5, D7, D9) and Westfield (D30, D40, D50) choose a third-party gas supplier while Citizens continues to provide regulated delivery service.
Does Citizens support EDI for commercial data exchange?▾
Yes, for approved gas suppliers in the Citizens Energy Select program. Citizens exchanges ANSI X12 transactions including 867 (usage), 854 (nominations), 810 (invoice), and 814 (account status) via VAN or SFTP.
Is there a public API for Citizens energy data?▾
No public API is published by the utility. Programmatic access is available via CSV exports (scriptable) or through Nectar, which provides API access to Citizens billing and interval data with customer authorization — see docs.nectarclimate.com.
How can a third party access my business's usage data?▾
Provide written authorization and submit a request to the Citizens Business Contact Center (317-927-4328); data is delivered as CSV/PDF in 2-5 business days. For ongoing access, use a Key Account Coordinator or Nectar's API (docs.nectarclimate.com).
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