A sublease agreement is a rental contract in which an existing tenant re-rents all or part of their space to a new occupant for a defined period. Three parties sit inside the arrangement: the landlord, the original tenant (the sublessor), and the new occupant (the subtenant). The original tenant stays on the master lease and remains responsible to the landlord for rent and conduct, while the subtenant pays rent to the original tenant rather than to the landlord directly. That structure is what makes subleasing useful when you need to leave temporarily, and also what makes it risky: your own housing and finances remain on the hook for whatever the subtenant does.
Sublease Versus Lease Assignment
Subleasing and assigning a lease sound similar and work very differently. In a sublease, the original tenant stays on the master lease and acts as a middleman, collecting rent from the subtenant while still owing rent to the landlord. The subtenant has no direct legal relationship with the landlord.
A lease assignment transfers the remaining lease to a new person entirely. The new tenant steps into the original tenant’s position and deals directly with the landlord. The original tenant typically walks away from day-to-day obligations, though in many cases they stay financially responsible if the new tenant stops paying, unless the landlord explicitly releases them.
If you’re leaving temporarily and plan to return, a sublease fits. If you’re leaving for good, an assignment is usually cleaner.
Getting the Landlord’s Permission
Before anything else, read what the master lease says about subletting. Leases handle it in one of four ways: they prohibit it outright, they require the landlord’s written consent, they allow it without restriction, or they say nothing. When the lease is silent, tenants can generally sublet, but getting explicit written permission is still the safer move.
If consent is required, send the landlord a written request with the proposed subtenant’s employment details, income, and references. Many landlords will run a background or credit check. In a number of states, a landlord who agreed to a consent-required clause cannot refuse a sublease without a legitimate reason; poor credit, insufficient income, or a history of eviction are common grounds for turning someone down.
Subletting without permission when your lease requires it is a breach. The landlord can start eviction proceedings against you, and the subtenant has no independent right to stay. This is the single biggest mistake tenants make with subleasing.
What the Sublease Agreement Should Cover
A handshake between friends feels fine at the start, but sublease disputes get ugly fast without a written agreement. The document doesn’t need to be long, but it does need to cover specific ground.
Parties, Property, and Dates
List the full legal names and contact information for the sublessor, subtenant, and landlord. Include the complete address, specifying which rooms or areas the subtenant can use if they’re only occupying part of the space. Set firm start and end dates, and make sure the end date falls before the master lease expires. A sublease can never outlast the lease it depends on.
Rent, Deposits, and Utilities
Spell out the monthly rent, when it’s due, and how the subtenant should pay. State the security deposit amount and the conditions for returning it. The original tenant’s own deposit stays with the landlord, so a separate deposit from the subtenant protects the sublessor against damage.
There’s generally no law preventing a sublessor from charging more than the master lease charges, though some landlords or lease agreements restrict it. Check the master lease. Clarify which utilities are included in rent and which the subtenant pays separately, and whether the subtenant pays the utility company directly or reimburses the sublessor.
Incorporating the Master Lease
Every sublease should include a clause incorporating the master lease by reference. This binds the subtenant to the original lease’s rules, from pet policies to noise restrictions, without rewriting them. It also establishes a legal point that matters: the sublease cannot grant the subtenant more rights than the master lease gives the original tenant. Attach a copy of the master lease so the subtenant can read what they’re agreeing to.
Condition at Move-In
Before the subtenant moves in, walk through together and record the condition of each room in writing. Note existing damage, stains, scratches, and wear. Take dated photos. The chain of accountability in a sublease is longer than in a standard rental: if the subtenant damages something, the landlord comes after the original tenant’s deposit, and the original tenant then has to recover that money from the subtenant. Without a documented baseline, proving who caused what is nearly impossible.
Who Is Responsible for What
The original tenant remains fully liable to the landlord under the master lease, regardless of what the sublease says. If the subtenant skips a rent payment, the landlord doesn’t chase the subtenant; they come to you. If the subtenant trashes the bathroom, you’re paying for repairs. The original tenant is essentially a guarantor for everything the subtenant does.
At the same time, the original tenant functions as the subtenant’s landlord: collecting rent, responding to maintenance complaints, and coordinating repairs. For problems that only the actual landlord can fix, like a broken furnace, the original tenant’s job is to notify the landlord promptly and push for the repair.
The subtenant’s position is different and more exposed. Their main obligation is to pay rent on time and follow both the sublease and the master lease. They have a right to peaceful, undisturbed use of the space, sometimes called “quiet enjoyment.” But their right to stay depends entirely on the original tenant staying in good standing. If the original tenant gets evicted or defaults, or the master lease ends for any reason, the sublease dies with it. Some landlords may offer the subtenant a new direct lease at that point, but they’re under no obligation to do so. Before signing a sublease, it’s reasonable for a subtenant to ask whether the sublessor is current on rent.
Deposits, Insurance, and Taxes
Security deposits in a sublease are two separate pots of money. The original tenant’s deposit sits with the landlord and secures the master lease. The subtenant’s deposit, collected by the sublessor, secures the sublease. If you collect a deposit from a subtenant, you’re subject to the same deposit laws that apply to landlords in your jurisdiction: holding the money in a specified way, returning it within a set timeframe after move-out, and providing an itemized list of any deductions. Failing to follow these rules can trigger penalties, sometimes double or triple the deposit amount. Look up your local security deposit laws before collecting anything.
Insurance has a gap most people miss. The landlord’s property insurance does not cover either tenant’s belongings, and the original tenant’s renters insurance does not cover the subtenant’s property or liability. Each person needs their own policy. For the original tenant, keeping renters insurance active during the sublease matters because a fire or flood caused by the subtenant could produce liability claims that reach you through the master lease.
Money you receive from a subtenant is rental income, and the IRS expects you to report it. In most cases, you’ll report sublease income on Schedule E (Form 1040), which is the standard form for rental income from real estate.1Internal Revenue Service. 2025 Instructions for Schedule E (Form 1040) You can deduct related expenses, including the rent you pay to the landlord for the subleased portion and utilities you cover for the subtenant’s space, against that income. If you sublease for fewer than 15 days during the year, you don’t need to report the income, but you also can’t deduct related expenses.2Internal Revenue Service. Publication 527, Residential Rental Property If $600 or more in rent changes hands during the year, Form 1099-MISC reporting may apply.3Internal Revenue Service. About Form 1099-MISC, Miscellaneous Information
When the Subtenant Stops Paying or Won’t Leave
If a subtenant stops paying rent, the sublessor cannot change the locks or move their belongings out. You have to follow the same eviction procedures a landlord would: written notice and, if the subtenant doesn’t leave or cure the problem, an eviction action in court. The specific notice period varies by jurisdiction. Self-help evictions are illegal everywhere.
The timeline creates real exposure. While the eviction moves through the court, you still owe rent to the landlord, and if the subtenant has stopped paying, that money comes out of your pocket. This is why screening a subtenant carefully before signing is as important as any landlord’s screening of a regular tenant. Check references, verify income, and trust your instincts.
The same rule applies when a subtenant holds over past the agreed end date. You can’t skip the legal steps because the term expired. Courts require formal proceedings regardless of how clear-cut the situation looks.