First-time landlord here so I'm still learning the ropes. My tenant gave me 30 days notice for his move out date which is supposed to be the 31st of this month. He came to me last week and told me that he would be gone by today. I returned his full deposit back to him which he deserved because he returned the apartment back to me in the condition it was a when he rented it. Then he asked me about the remaining balance. I was a little confused since he said he should also get prorated rent for moving out early. Is this the case and how do I handle this since his 30 days notice was for the end of the month?

if he is owed the prorated amount I have no issue returning it to him and I am still within the 30 days to return any and all deposits. I'm just looking for Clarity on the situation. I'm in North Carolina if it matters.