How to Sublet an Apartment: Sublet vs. Sublease

Short answer: Sublet an apartment by rereading your lease's subletting clause first, getting written landlord consent, screening a subtenant the way a landlord would screen you, drafting a written sublease agreement that states the rent, dates, and deposit, documenting the unit's condition before handover, and keeping in mind that you remain responsible to your landlord the entire time, even after the keys change hands.

Subletting sounds simple until the first awkward question shows up: is this allowed, who is actually on the hook if it goes wrong, and does “sublet” even mean what you think it means. It usually does not, not exactly, and the gap between the common-use meaning and the actual legal shape of the transaction is where most sublet problems start. A sublet is not a clean handoff. It is you, still the tenant, renting your unit to someone else while your own name stays on the original lease and your own obligation to the landlord does not move an inch.

This walkthrough treats subletting as the eight-step process it actually is: understanding what a sublet is and is not, checking your lease before you do anything else, getting consent in writing, setting the terms, finding and screening a subtenant, putting a sublease agreement in writing, documenting the handover, and understanding exactly what you remain liable for the whole time someone else is living in your space. It sits alongside ReloPeak’s lease-breaking walkthrough for the related but different question of ending a lease entirely, and the calculator handles the salary side of a relocation while you read. The companion on this page turns your own numbers into an illustrative read on what subletting nets you.

What subletting actually means

Subletting means you, the tenant, rent your unit or a room inside it to another person, called a subtenant, while you remain the tenant of record on the original lease. The landlord’s legal relationship stays with you. The subtenant’s relationship, financially and practically, is with you as well, not with the landlord, which is the single fact that explains almost everything else about how a sublet behaves.

This is different from simply having a roommate added to your lease, where the new person typically becomes a co-tenant jointly responsible to the landlord directly. It is also different from a lease assignment, where your interest in the lease transfers to a replacement tenant and, with landlord consent, your own obligation generally ends. A sublet keeps you in the middle of the transaction for as long as it runs, which is exactly why the steps below exist: to make sure being in the middle does not become a liability you never agreed to.

Sublet vs. sublease vs. lease assignment, and why the difference matters

The three terms describe three related but distinct arrangements, and mixing them up is where real risk hides. Subletting, as described above, keeps you as the tenant of record and puts you between the subtenant and the landlord for the full term of the sublease. A lease assignment transfers your interest in the lease to a replacement tenant, and where the landlord consents in the ordinary way, your own obligation typically ends or is substantially reduced, which makes assignment the cleaner exit for someone leaving permanently. A sublease, strictly, is the agreement document itself, the contract between you and your subtenant.

In practice most leases address subletting and assignment in the same clause, and some permit one while restricting the other. Read the clause closely rather than assuming the word “sublet” in your lease also covers assignment, or the reverse. If you are leaving your apartment for good rather than temporarily, our lease-breaking walkthrough works through assignment and the other exit routes in more depth, since subletting is usually the wrong tool for a permanent departure and assignment or a standard lease termination is usually the better one.

Before you start: what you need on hand

Gather four things before you take a single public step toward subletting. Your current lease, read in full rather than skimmed, with the subletting and assignment clauses specifically located and reread twice. Your actual dates: when you need the sublet to start, how long it needs to run, and whether that window lines up with the remaining term of your own lease, since a sublease can never outlast the lease it sits inside. Your target rent and deposit figures, worked out honestly rather than guessed. And a realistic sense of how much ongoing involvement you are willing to provide, since you remain the point of contact for the landlord regardless of who is actually living in the unit.

Budget roughly two to four weeks for a sublet done properly, from requesting consent through a signed agreement and a documented handover, more if your landlord’s approval process includes its own background check or application for the subtenant. The difficulty of any single step here is low. What makes the process harder than it looks is holding the line on consent and documentation when a convenient subtenant is ready to move in faster than the paperwork is ready to support.

Step 1: Reread your lease for the subletting clause

Open your lease and find the clause that addresses subletting, assignment, and additional occupants, usually grouped together. Read exactly what it says rather than what you remember it saying. Some leases forbid subletting outright. Many require written landlord consent, sometimes with a stated process and timeline for requesting it. Some require the landlord to approve or screen the specific subtenant, effectively running their own application on top of yours. A smaller number are silent on the subject, which is not the same as permission and should be treated as a question to ask rather than an assumption to make.

Note any fees mentioned, some leases charge a processing or administrative fee for an approved sublease, and note any restrictions on how long a sublet may run or how many times it may happen during your lease term. Watch out for treating a lease’s silence as an open door. Silence usually means the situation was not anticipated, not that it was deliberately allowed, and the safer reading is to ask rather than assume.

Step 2: Ask your landlord for written consent, don’t assume

Contact your landlord or property manager directly and ask, in writing, whether subletting is permitted and what the approval process involves. Put the request in an email or a message platform that creates a timestamped record, even if the actual conversation happens by phone first. State your reason, your proposed dates, and that you intend to remain fully responsible for the lease, which is both true and reassuring to a landlord weighing the request.

A landlord who says yes verbally but never confirms it in writing has not actually given you anything you can rely on later. Ask for the consent in writing specifically, even if that means following up a friendly phone call with “just to confirm in writing, as discussed” and a brief recap of what was agreed. If the landlord requires the subtenant to apply directly, get that process started early, since a background or credit check can take longer than either of you expects.

Step 3: Decide how long the sublet will run

Set a start date and an end date that both fit comfortably inside your own lease’s remaining term, never past it. A sublease that runs even a few days beyond your own lease’s end date is not enforceable on those extra days no matter what it says, which leaves the subtenant with nowhere to go and you with an uncomfortable conversation you could have avoided by setting the dates correctly the first time.

Decide early whether the arrangement is a fixed term, common for a semester abroad, a temporary work assignment, or a trial separation period, or open-ended with a notice period either side can trigger. A fixed term is easier for both people to plan around and is the better default unless you have a specific reason to want flexibility. If you might return to the unit yourself before your own lease ends, say so plainly in the sublease agreement rather than leaving it as an unstated possibility the subtenant discovers later.

Step 4: Set the rent and work out who collects it

Price the sublet honestly. Charging noticeably above your own rent is where sublets draw the most scrutiny, from landlords and, in some cities, from local rent regulation that caps what a sublease may charge relative to the underlying lease. A defensible structure is your own rent, plus a modest, clearly stated amount for something real, utilities you are prepaying, furnishing, or a short-term premium, rather than an unexplained markup that reads as profiteering on a lease you do not own.

Decide the payment mechanism and the due date, and decide what happens if a payment is late, before you need the answer rather than during the first missed payment. The companion on this page takes your own rent, your planned subtenant rent, the length of the sublet, and the deposit you plan to collect, and turns them into an illustrative net figure so you can see the real math rather than guessing at it.

Step 5: Advertise and screen a subtenant like a real landlord would

Search your own network first, since a referral from someone you already trust substitutes for some of the screening you would otherwise have to do cold. From there, general rental listing platforms and sites built specifically for short-term and sublet housing are the usual channels, along with university housing boards or employer relocation groups if your circumstances fit either one.

Screen the way a landlord screens you: ask about income and how rent will actually be paid, confirm their timeline matches your dates, and ask for a reference from a previous landlord or roommate where one exists, then actually contact it. Meet in person or by video before handing over keys to anyone. Watch out for screening only for a friendly first impression. A subtenant who seems easygoing in one conversation has told you something true, but it is not the same information as whether rent arrives reliably on the date you agreed, and both matter.

Step 6: Draft a sublease agreement

Write the agreement before anyone moves in, not after. At minimum it should state the exact rent and due date, the start and end date, the deposit amount and the conditions for its return, which furnishings or items are included, who handles which utilities, and what happens if either party needs to end the arrangement early. State plainly that the subtenant’s occupancy cannot extend past your own lease’s end date, and note any landlord-imposed conditions your consent came with, since the subtenant is bound by your original lease’s rules even though they never signed it directly.

Both people should sign and date it, and each should keep a copy. It does not need to be drafted by an attorney to be useful, but it does need to be specific rather than a loose verbal understanding written up afterward from memory. An informal handover where someone simply moves in and starts paying you is still legally a sublet whether either of you calls it that, and it is the version most likely to leave you with no leverage if something goes wrong.

Step 7: Collect a deposit and document the unit’s condition

Collect a deposit from your subtenant before they move in, sized the way your own landlord sized yours, and state in the sublease agreement exactly what it covers and the conditions for returning it. Keep this deposit separate in your own recordkeeping from the deposit you paid your landlord, since the two are legally distinct even though they protect similar things.

Walk the unit together with your subtenant before they move in and photograph everything, the same documentation ReloPeak’s security deposit walkthrough recommends for any move-in. This record is what protects you if your landlord later disputes the unit’s condition at the end of your own lease, and it is what protects your subtenant if a disagreement arises about what was already there before they arrived.

Step 8: Hand over keys and set the ground rules

Hand over keys, fobs, parking passes, and any mailbox access only after the agreement is signed and the deposit has cleared, never before. Walk through practical items the subtenant needs: where utilities are set up, building rules, trash and recycling schedules, and how to reach you if something breaks. Confirm you remain reachable for the duration of the sublease, since you are still the tenant the landlord will call first if anything comes up.

Set clear expectations about check-ins, whether you plan to visit the unit, and how you will handle the handback at the end of the sublease term, including a final walkthrough that mirrors the move-in one. A sublet that starts with a clear, documented handover tends to stay clear through the rest of the term, and a sublet that starts informally tends to stay informal in exactly the ways that matter when a dispute eventually happens.

Why you’re still liable even after you hand over the keys

This is the fact that trips people up most, and it is worth stating plainly one more time: in a standard sublet, your landlord’s relationship is with you, not your subtenant, for the entire term. If rent is due on the first and your subtenant has not paid you, you still owe your landlord on the first. The landlord did not sign anything with your subtenant and generally has no obligation to pursue them directly; their lease is with you, and your sublease with the subtenant is a separate, private arrangement that sits underneath it.

The same logic applies to damage, lease violations, and anything else that affects the unit. A subtenant who causes a problem has created a problem for you with your landlord, which you then have to resolve separately with the subtenant through whatever the sublease agreement allows. This is not a reason to avoid subletting, since it is a normal and common arrangement handled successfully every day, but it is the reason every step above exists: consent, screening, a written agreement, and documentation are what give you real recourse rather than a sympathetic story if something goes wrong.

What happens if the subtenant stops paying or damages the unit

If a subtenant stops paying, your first obligation is still to your own landlord, on time, regardless of what you are owed. Separately, your sublease agreement is what determines your options against the subtenant: it typically allows you to end the sublease for nonpayment and, depending on your state and local law, pursue the unpaid rent through a formal process, sometimes small claims court for smaller amounts. Keep every payment record and every communication in writing, since a dispute resolved later is resolved on documentation, not on who remembers the conversation more clearly.

If a subtenant damages the unit, document it the same way you would document any move-out, with photographs and a direct comparison to your original move-in record. Your deposit from the subtenant is the first line of recovery; if the damage exceeds it, the sublease agreement and, if necessary, a small claims filing are the next steps. Report significant damage to your landlord honestly and promptly rather than trying to quietly repair it yourself and hope it goes unnoticed, since an honest, early conversation is almost always handled better than a surprise discovered later.

Illustrative cost of subletting vs. the alternatives

The chart below compares an illustrative monthly outcome across the three common ways to hand off a unit you can no longer occupy yourself: subletting it at a modest premium over your own rent, assigning the lease to a replacement tenant with landlord consent, and simply breaking the lease outright with no replacement in place. Every figure is a placeholder built on a $1,800 monthly rent to show the shape of the comparison rather than to predict your own numbers.

Where the money actually sits during a sublet

It helps to see the money as a simple pass-through with your own obligation sitting underneath it the whole time, rather than as a transaction that ends once the subtenant pays you. The chart below divides an illustrative subletting arrangement into where each dollar is actually obligated to go.

Common mistakes that turn a sublet into a mess

A short list accounts for most sublets that go wrong, and nearly all of them are avoidable at the point they happen.

• Subletting without checking the lease first. Assuming subletting is allowed, or assuming a verbal “sure, that’s fine” from a landlord counts as consent, is the single most common and most avoidable mistake here.
• No written sublease agreement. An informal handover with no document leaves both people with nothing to point back to if a disagreement happens.
• Dates that run past your own lease. A sublease that extends even slightly beyond your lease’s end date is not enforceable on those extra days.
• Skipping the subtenant screening. Treating a subtenant search as less important than finding a roommate, when financially it carries similar risk, leaves you exposed to the same nonpayment problems a bad roommate would.
• No move-in documentation. Without photographs and a condition record at handover, a later dispute with either your landlord or your subtenant has no evidence behind it.
• Charging an unexplained premium. A markup with no stated reason draws landlord scrutiny and, in some cities, runs against local rules capping what a sublease may charge.

Troubleshooting the awkward cases

What if your landlord simply says no? Respect that answer rather than subletting anyway, since doing so against an explicit refusal converts a request into a lease violation. Ask whether a lease assignment is available instead, since some landlords who decline subletting will still approve a full replacement tenant, which ReloPeak’s lease-breaking walkthrough covers in depth.

What if your subtenant wants to stay past the agreed end date? Treat it as a new negotiation rather than an automatic extension. If you plan to return to the unit yourself or your own lease is ending, say so clearly and early, and if an extension genuinely works for you, confirm it with your landlord again rather than assuming your original consent covers a longer term.

What if you are subletting only a room while you remain in the apartment? The same principles apply, consent, screening, and a written agreement, but add practical house-rules detail the same way a roommate agreement would, since you are both occupying the unit at once. ReloPeak’s roommate walkthrough covers the shared-living side of that arrangement in more detail.

What if you need to sublet on short notice? Compress the timeline honestly rather than skipping steps. Request consent immediately and in writing, screen faster but not less carefully, and resist the pressure to accept the first available subtenant without at least a basic reference check, since a rushed, unscreened sublet is where the risk in this whole process concentrates.

A worked example: subletting for a semester abroad

Take an illustrative tenant paying $1,900 a month with seven months left on the lease, leaving for a five-month work assignment and planning to return before the lease ends. The lease permits subletting with written consent, and the landlord agrees in writing within a week of the request. The tenant sets the sublet rent at $2,000, a $100 premium to cover a one-time cleaning and minor furnishing cost, and sets the term at exactly five months, ending a full six weeks before the tenant’s own lease expires so there is a buffer to find a next step.

A subtenant is found through a university housing board, screened with a short call and a reference from a previous landlord, and signs a written sublease agreement matching the dates, the $2,000 rent, and a $1,900 deposit mirroring the tenant’s own. The tenant and subtenant walk the unit together and photograph it before handover. Over five months the subtenant pays on time every month; the tenant forwards $1,900 to the landlord each month as always and keeps the $100 premium, netting $500 over the sublet, which covers the cleaning cost with a small amount left over. At the end of the five months the subtenant moves out, the unit is inspected against the original photos, the deposit is returned in full, and the tenant resumes occupying the apartment with six weeks still left on the lease.

Run your own sublet math

The decision gets concrete once your own numbers are in it. Start with your own rent and the months you plan to be away, since that sets your real exposure regardless of what a subtenant pays. Set the rent you plan to charge honestly, add the deposit you plan to collect, and let the companion on this page turn those into an illustrative net figure, the total you would collect, the total still owed to your landlord, and what you actually keep.

Use it to sanity-check a markup before you advertise it, not after a subtenant has already questioned it. If the net margin the companion returns looks too thin to be worth the ongoing liability described above, that is useful information too, since a sublet only makes sense when the arrangement is actually worth the risk you are carrying for the whole term. Pair it with the calculator for the wider relocation math if the reason you are subletting is a move rather than a temporary absence.

Your sublet checklist

The compact version, for saving and working through in order.

• Reread your lease: locate the subletting and assignment clause and read exactly what it allows.
• Get consent in writing: a verbal yes is not enough to rely on later.
• Set dates inside your lease: never let the sublease run past your own lease's end date.
• Price it honestly: your own rent plus a modest, explainable premium rather than an unexplained markup.
• Screen like a landlord would: income, timeline, and a real reference check, not just a friendly first impression.
• Write the sublease agreement: rent, dates, deposit, and responsibilities, signed before move-in.
• Document the handover: photograph the unit's condition with your subtenant present.
• Stay reachable: you remain the tenant your landlord will call first for the entire term.

Print it, screenshot it, or rebuild it in the companion above; the order protects you in both directions, from your landlord and from your subtenant.

The bottom line

Subletting an apartment is a real, common, and entirely workable arrangement, but it only works smoothly when you treat it as the transaction it actually is rather than the casual handoff it sounds like. You remain the tenant of record for the whole term, which means every step here, rereading the lease, getting written consent, screening a subtenant properly, and putting the agreement in writing, exists to protect the one fact that does not change: your landlord’s relationship stays with you no matter who is actually living in the unit. Price the sublet honestly, document the handover the way you would any move-in, and keep a reserve against the version of events where a payment runs late or a repair comes up. In the illustrative worked example above, a five-month sublet at a modest $100 premium netted $500 while the tenant’s own rent obligation never moved. Handle the rest of a temporary absence with ReloPeak’s long-distance move plan if the reason you are subletting involves relocating, and read the lease-breaking walkthrough first if what you actually need is to leave for good rather than to sublet temporarily.

ReloPeak publishes this walkthrough as general education on how subletting typically works, not as legal advice. Subletting rules, consent requirements, permitted rent markups, and the remedies available if a subtenant stops paying or causes damage differ by state, by city, and by the specific lease you signed, and some jurisdictions regulate sublease pricing and eviction procedure in ways this walkthrough does not attempt to summarize. Every dollar figure above, including the premium, the deposit, and the worked example, is illustrative and chosen to show how the arrangement fits together rather than to predict your own numbers. Read your own lease in full, get any consent in writing directly from your landlord, and speak with a qualified attorney or local tenant organization before relying on a sublease involving real money or a unit you have not documented carefully.