You owe the rent for the months left on the lease until the landlord re-rents the unit, minus your deposit and plus whatever early-termination fee the lease names, and most states, Nevada included, require the landlord to make a reasonable effort to re-rent rather than let the bill run.
A lease is a contract for a fixed period, so leaving early is a breach, and the question is only what the breach costs. The answer is set in three places: the lease itself, the state's landlord and tenant statute, and how quickly the unit rents again. Nothing on a credit report or a court docket follows from leaving; those follow from leaving and not paying.
What you owe, and what caps it
The starting point is every month of rent left on the term. Two things bring it down. Most leases carry an early-termination clause, usually one or two months' rent as a flat fee in exchange for a clean exit, and where one exists the fee replaces the running rent. Where there is none, the landlord's duty to mitigate applies: they have to try to re-rent, and once a new tenant is paying, your liability for those months ends.
The deposit is not the fee. It is applied against what you owe, and if what you owe is less than the deposit, the balance comes back to you on the state's normal deposit timeline, with an itemization.
The exits that cost nothing
Federal law lets active-duty service members end a lease on orders (the Servicemembers Civil Relief Act) with 30 days' notice after the next rent date. Most states add their own: Nevada's NRS 118A.340 lets a tenant who is 60 or older, or who has a physical or mental disability, end a lease with 30 days' written notice when a doctor certifies the move is for their health or to move into a facility that provides care, and NRS 118A.345 lets a victim of domestic violence end one with notice and a protective order or police report.
Two more that apply everywhere: a unit that is unlivable and stays that way after written notice (constructive eviction), and a landlord who breaches first, by entering without notice or refusing to make required repairs. Both need a paper trail; neither works as an argument made on the way out.
How to leave well
Give written notice with a date, ask for the early-termination terms in writing, and offer to help re-rent: a unit that shows well and can be seen re-rents faster, and every week saved is a week you do not pay for. Get the move-out inspection done together, photograph everything, and get any agreed settlement in one signed document before the keys change hands.
The worst outcome is not the fee. It is a judgment for unpaid rent, which sits on a screening report for seven years and is what a future landlord sees first.
Questions people ask
How much does it cost to break a lease?
Typically one to two months' rent where the lease has an early-termination fee, and otherwise the rent until the unit is re-rented, which in a normal market is a month or two. Add any advertising or re-letting costs the lease lets the landlord pass through.
Does breaking a lease hurt your credit?
Not by itself. Leaving early is a contract matter, not a credit event. Unpaid balances that go to collections or become a court judgment do hurt, and a judgment also appears on tenant screening reports.
Can a landlord keep the whole deposit if I break the lease?
Only up to what you actually owe. The deposit is applied against rent and damages, and the landlord still has to itemize what was kept within the state's deadline (30 days in Nevada).