Hello student NIT Patna structure are as mentioned below -

Tuition fee +examination and registration Fees Rs 18,500 per year

Activity +medical fee Rs 1300

Other Fees one time Rs12850

Total 33650

For more details refer to the link mentioned below - http://nitp.ac.in/nitpold/feestr_nitp.php#

Feel free to comment if you've any doubt

Good luck