帮我用专业的语言改写下面这段话：贷款利率49增值税按收费收入的9计征增值税附加为增值税的12；企业所得税税率为25。

The loan interest rate is set at 4.9%. Value-added tax is levied at a rate of 9% based on the charged revenue, with an additional value-added tax surcharge of 12%. The corporate income tax rate is 25%.