WASHINGTON – The Internal Revenue Service, citing the drain that high gas prices are having on people’s finances, said Monday it is raising the automobile mileage rate that businesses and other drivers can claim.

The tax agency said the optional standard rate to calculate deductible operating costs for business vehicles will rise from 50.5 cents a mile to 58.5 cents for the final six months of 2008.

That rate also applies to businesses and others entitled to depreciation allowances that operate automobiles for charitable, medical or moving purposes.

“Rising gas prices are having a major impact on individual Americans,” said IRS Commissioner Doug Shulman. “Given the increase in prices, the IRS is adjusting the standard mileage rates to better reflect the real cost of operating an automobile.”