I used almost the same amount of gas I did last January (74 therms) and my bill was about $30 dollars higher. These bill increases are driven by commodity prices, which BGE does not profit from (trust me, I work for a utility regulatory agency). Gas is nearly twice as much per therm as it was last year. So, even if you use exactly the same amount of gas you used last year, your bill will be about 40-50% higher, including changes in the delivery price for gas.

If you want to save money, use less gas. Wear a sweater and get a space heater or electric blanket.