HRA means House rent allowance in income tax. It means the component of salary received towards the rent payment and is allowed as deduction from taxable salary under section 10-13A. HRA exemption is allowed least of the below
Actual HRA received by the employee
40 % of salary for non metro city or 50 % of salary if the rented property is in Metro city like mumbai, delhi, bengaluru , chennai, etc)
Actual rent paid less than 10% of salary.
For above calculation , salary would include basic, dearness allowance and fixed percentage of commission.