Understanding your rate per therm is essential for managing natural gas costs in Georgia. Because the market is deregulated, your total rate combines two components: Atlanta Gas Light's delivery charge and your gas marketer's supply charge.
As of January 2026, typical total rates range from $0.90 to $1.20 per therm, depending on your marketer's pricing and your usage level. This guide breaks down how these rates work and what affects your cost.
AGL Delivery Charges
Atlanta Gas Light's delivery charges are regulated by the Georgia Public Service Commission and are the same regardless of which gas marketer you choose. The delivery rate includes:
- Customer charge: $20.00 per month (fixed)
- Base delivery charge: Approximately $0.25-0.35 per therm
- Pipeline replacement surcharge: Small additional per-therm fee
These charges cover the cost of maintaining the pipeline network, reading meters, and providing customer service.
Gas Marketer Supply Rates
The supply portion of your rate—the actual cost of natural gas—comes from your chosen marketer. Current rates from certified Georgia marketers range from approximately:
- Fixed-rate plans: $0.64-0.90 per therm (12-month terms)
- Variable-rate plans: $0.60-1.00+ per therm (fluctuates monthly)
The lowest rates are typically offered by marketers with minimal overhead and online-only service. Premium marketers may charge more but offer additional services or renewable gas options.
Calculating Your Total Rate
To calculate your effective rate per therm, divide your total bill by your therm usage. For example, if your bill is $120 and you used 100 therms, your effective rate is $1.20/therm.
This effective rate will be higher than just your marketer's supply rate because it includes AGL's delivery charges and the fixed customer charge. The customer charge has a bigger impact on your effective rate when usage is low (summer months).
Finding the Best Rate
The Georgia PSC's pricing comparison tool is the best resource for comparing current marketer rates. Look for the "effective rate" column, which includes any monthly fees in the calculation.
Remember that the lowest rate isn't always the best deal—consider contract length, early termination fees, and the marketer's reputation for customer service when making your choice.