Maryland drivers filling up at the pumps could feel a bigger pinch on their wallets when the state's gas tax increases in July.

On July 1, the state tax rate on a gallon of gas will increase to 47 cents per gallon, according to a report published on the state comptroller's website last week. The spike marks a 10 percent increase compared to the current rate, according to a report by Maryland Matters, and is expected to add about 65 cents to the total cost of filling a 15-gallon gas tank.

On Wednesday, the average price for a gallon of gas in Maryland was $3.49. A year ago the state average was $4.59 per gallon.

Owners of diesel-powered vehicles will also see a similar spike on July 1 when the state tax increases from nearly 43.5 cents per gallon to almost 47.8 cents per gallon. Over the last two years, the state tax on diesel has increased by more than 29 percent.... Read More: Pikesville Patch