Hi, Basic salary should be not less than 40% of your gross, as per your salary structure it is correct. srividya.kothapalli. to calculate your basic, you need to know your annual gross amount 40 % of your gross is your basic. the rest comes under the allowances and benefits ,as per the company policy.i dear all if the company is follows 35 from the gross is the basic mean while the employee is ... Calculation of leave without pay, whether done on the basic or gross salary. 14 Replies. Dear seniors greetings the calculation of leave without pay if done on the basic or gross salary. you are kindly ...