https://www.nolo.com/legal-encyclopedia/tenants-right-break-rental-lease-north-carolina.html
Landlord’s Duty to Find a New Tenant in North Carolina
If you don’t have a legal justification to break your lease, the good news is that you may still be off the hook for paying all the rent due for the remaining lease term. This is because under North Carolina law (
Isbey v. Crews, 284 S.E.2d 534 (N.C. Ct. App. 1981)), your landlord must make reasonable efforts to re-rent your unit—no matter what your reason for leaving—rather than charge you for the total remaining rent due under the lease. So you may not have to pay much, if any additional rent, if you break your lease. You need pay only the amount of rent the landlord loses because you moved out early. This is because North Carolina requires landlords to take reasonable steps to keep their losses to a minimum—or to “mitigate damages” in legal terms.
So, if you break your lease and move out without legal justification, your landlord usually can’t just sit back and wait until the end of the lease, and then sue you for the total amount of lost rent. Your landlord must try to rerent the property reasonably quickly and subtract the rent received from new tenants from the amount you owe. The landlord does not need to relax standards for acceptable tenants—for example, to accept someone with a poor credit history. Also, the landlord is not required to rent the unit for less than fair market value, or to immediately turn his or her attention to renting your unit disregarding other business. Also, the landlord can add legitimate expenses to your bill—for example, the costs of advertising the property.
If your landlord rerents the property quickly (more likely in college towns and similar markets), all you’ll be responsible for is the (hopefully brief) amount of time the unit was vacant.
The bad news is that if the landlord tries to rerent your unit, and can’t find an acceptable tenant, you will be liable for paying rent for the remainder of your lease term. This could be a substantial amount of money if you leave several months before your lease ends. Your landlord will probably first use your security deposit to cover the amount you owe. But if your deposit is not sufficient, your landlord may sue you, probably in small claims court where the limit is $5,000 in North Carolina.