A lease is a written contract between you and a landlord that sets the rent, how long you can stay, and what both of you are responsible for

When you sign a lease, you are entering a legal agreement. The landlord agrees to let you live in the apartment for a set period — usually 12 months — and you agree to pay rent on a specific date each month. The lease also lists rules about pets, guests, maintenance, and what happens if either of you breaks the agreement. Once signed by both parties, it becomes a binding document that a court can enforce.

A lease protects both you and the landlord. For you, it means the landlord cannot raise your rent or evict you without cause during the lease term (though laws vary by state). For the landlord, it means you have committed to paying rent for that period and cannot straightforward leave without penalty. Without a lease, you would be a month-to-month tenant with far fewer protections.

Key Takeaways

  • A lease is a written contract that specifies the monthly rent amount, lease term (usually 12 months), and rules for both tenant and landlord.
  • Once you sign, you are legally bound to pay rent for the full lease term, and the landlord cannot evict you or raise rent without legal cause.
  • The lease must include the landlord's name and address, your name, the apartment address, move-in date, and the amount of any security deposit.
  • State and local laws add protections to every lease automatically — such as the landlord's duty to maintain the apartment — whether or not the lease mentions them.
  • You should read the entire lease before signing and ask the landlord to explain anything unclear, because signing means you have accepted all the terms.

What must be in a lease

A valid lease includes the names and addresses of both the landlord (or property management company) and the tenant, the address of the apartment, the move-in date, and the monthly rent amount. It also states the lease term — how many months or years you are renting — and the date rent is due each month. Most leases require a security deposit, and the lease should say how much it is and under what conditions the landlord can keep it.

The lease should also list house rules: whether pets are allowed, how many people can live there, whether you can sublet, and what happens if you break the lease early. Many leases include a clause about who pays for utilities, whether the landlord will maintain appliances, and what you must do before moving out (like cleaning or repainting). Some leases spell out late fees or require you to carry renters insurance.

If something is missing — such as no mention of the security deposit amount or no move-in date — that is a red flag. Ask the landlord to add it in writing before you sign. A complete lease protects you both by making expectations clear from the start.

What a lease does not override

A lease cannot take away rights that your state or local housing laws give you. For example, if your state law says a landlord must keep the apartment habitable and make repairs within 14 days, the lease cannot say the landlord has no repair duties. If local law says you have the right to a 30-day notice before eviction, a lease clause saying 7 days is void — the law wins.

Common protections that exist whether or not the lease mentions them include the right to a safe, clean apartment with working heat, water, and electricity; the right to privacy (landlords cannot enter without notice except in emergencies); and the right to have your security deposit returned within a set timeframe, usually 30 to 45 days. If the lease tries to waive these rights, those clauses are unenforceable.

Signing a lease means you are responsible for the full term

Once you sign, you are legally bound to pay rent for every month of the lease, even if you move out early or lose your job. If you leave before the lease ends, the landlord can pursue you for the remaining rent owed — either by taking you to small claims court or by selling the debt to a collection agency. This can damage your credit and make it harder to rent elsewhere.

Some leases include an early termination clause that lets you leave early if you pay a penalty — often one or two months' rent. Others allow you to break the lease if you give 60 days' notice and find a replacement tenant. Read this section carefully, because it determines what leaving early will cost you. If the lease is silent on early termination, you are responsible for the full term unless your state law allows you to break it under specific conditions (such as domestic violence or military deployment).

What happens if the landlord breaks the lease

If the landlord violates the lease — for example, by failing to repair a broken heater, entering your apartment without notice, or raising rent mid-lease — you have options. In most states, you can withhold rent (in an escrow account, not just refuse to pay), break the lease without penalty, or sue the landlord for damages. Some states allow you to "repair and deduct," meaning you can pay for the repair yourself and subtract the cost from your next rent payment.

The first step is usually to notify the landlord in writing of the problem and give them a important date to fix it — often 14 to 30 days depending on your state. Keep a copy of this notice. If the landlord does not respond, you can then pursue one of the remedies above. Document everything: take photos, keep emails, and note dates. If you end up in court, this evidence will matter.

How to read a lease before you sign

Read the entire lease, not just the rent and move-in date. Pay special attention to clauses about early termination, late fees, maintenance responsibilities, and what the landlord can deduct from your security deposit. If anything is unclear or seems unfair, ask the landlord to explain it or to change it before you sign. Do not sign a lease with blank spaces or sections you do not understand.

If the landlord refuses to change terms you disagree with, you have the choice not to rent. Signing means you have accepted all the terms, and you cannot later claim you did not understand them. Take a photo or get a copy of the signed lease for your records. You will need it if a dispute arises or if you need to prove you are a tenant when dealing with utilities, mail, or legal matters.

Month-to-month tenancy versus a fixed lease

If you do not sign a lease, you may be a month-to-month tenant. This means you pay rent each month and either you or the landlord can end the tenancy by giving notice — usually 30 days — without cause. Month-to-month tenancy is more flexible for you but also less stable: the landlord can raise rent or ask you to leave with short notice.

A fixed lease (usually 12 months) gives you more protection because the rent and terms cannot change during the lease period. However, you are locked in for that time. Most landlords prefer fixed leases because they know their income is stable. If you are unsure whether you will stay long-term, ask the landlord whether they offer shorter leases (6 months) or whether you can convert to month-to-month after the first year.

Frequently Asked Questions

Can a landlord change the lease after I sign it?

No. Once both of you sign, the lease is a binding contract and cannot be changed unless you both agree in writing. If the landlord tries to add new rules or raise rent mid-lease, that is a breach of the lease. You can refuse and the landlord cannot evict you for that refusal alone.

What if I sign a lease but the landlord never gives me a copy?

Ask for a copy in writing. You have the right to a signed copy for your records. If the landlord refuses, that is a red flag about their trustworthiness. In some states, a landlord's failure to provide a copy can be used as evidence in court if a dispute arises later.

Can I break a lease if the apartment has a serious problem like mold or no heat?

Yes, in most states. If the apartment becomes uninhabitable — meaning it is unsafe or unfit to live in — you can usually break the lease without penalty. You must notify the landlord in writing and give them time to fix it (usually 14 to 30 days). If they do not, you can move out and stop paying rent. Document the problem with photos and keep all notices.

What is the difference between a lease and a rental agreement?

A lease is a fixed-term contract, usually 12 months or longer. A rental agreement is typically month-to-month and can be ended by either party with notice. Both are written contracts, but a lease locks you in longer and offers more stability in rent and terms.

Do I have to sign a lease, or can I rent without one?

You can rent without a written lease, but it is not recommended. Without a lease, you are a month-to-month tenant with fewer protections. The landlord can raise rent or ask you to leave with short notice. A written lease protects both of you by making terms clear and enforceable.