deductible

deductible
/dɪˈdʌktəbl; dɪ`dʌktəbl/ adj
that may be deducted from one's taxable earnings （从应纳税的收入中）可扣除的
    Money spent on business expenses is deductible. 业务方面的开支是可扣除税款的.

牛津英汉双解词典