An Illinois sublease agreement lets you, the current tenant, rent your unit to someone else for part or all of your remaining lease term while you stay legally responsible to your landlord. To do it correctly in Illinois, you need to confirm your lease allows it, get your landlord’s written consent when required, put the arrangement in a written agreement that covers rent, term, deposit, and the rules of the master lease, and understand that your name stays on the hook for everything that happens next.
Can You Sublease Your Unit?
Illinois has no statute that grants or forbids subleasing outright. If your lease is silent on the subject, you’re generally free to sublease.1Illinois Legal Aid Online. Applying for Rental Housing Most modern leases are not silent, though. They either prohibit subleasing or require the landlord’s written consent first, and subleasing in violation of that clause is grounds for eviction. Read your lease before you do anything else.
Tenants inside Chicago get a stronger rule. Under Section 5-12-120 of the Residential Landlord and Tenant Ordinance, every tenant with a fixed-term lease has the right to sublease. The landlord cannot charge a fee for the transfer itself but can recover the documented cost of a credit or background check on the proposed subtenant.2American Legal Publishing. Municipal Code of Chicago – 5-12-120 Subleases If your lease requires consent, the landlord cannot unreasonably withhold it, and a landlord who violates the ordinance may be liable for damages, injunctive relief, and reasonable attorney’s fees.3American Legal Publishing. Municipal Code of Chicago – Chapter 5-12 Residential Landlords and Tenants
What to Put in the Written Agreement
A sublease missing key terms is worse than no sublease at all, because it creates the illusion of protection while leaving gaps a court won’t fill in for you. At a minimum, cover each of the following:
- Full legal names of the sublessor and the sublessee.
- The complete street address and unit number, plus any included spaces like parking or storage.
- A specific start date and end date. The sublease cannot extend past the expiration of your original lease.
- The monthly rent, due date, accepted payment methods, and where to send it.
- The security deposit amount, the conditions for deductions, and the timeline for return.
- Which party pays each utility, and whether you’ll rebill any shared services.
- Furniture and personal property staying in the unit, with their condition noted.
- A full copy of the master lease attached, so the sublessee knows every rule they’re bound by on pets, noise, smoking, guests, and common areas.
Every side understanding about trash day or whether the sublessee can hang shelves belongs in the document, not in a text thread. The point of writing it all down is to prevent the “I thought you were covering that” argument three months in.
Getting Landlord Approval and Signing
If your lease requires consent, send the landlord a written request with the proposed sublessee’s name, contact information, and enough background for the landlord to evaluate them. In Chicago, that written notice starts a 14-business-day clock: if the landlord does nothing within that window, the subtenant is deemed accepted.2American Legal Publishing. Municipal Code of Chicago – 5-12-120 Subleases Outside Chicago, no statutory deadline applies, so use certified mail or another delivery method that proves the landlord received the request.
Once the landlord approves, everyone signs. Illinois recognizes electronic signatures under the Uniform Electronic Transactions Act, so signing through a platform like DocuSign is legally equivalent to pen on paper when all parties consent to the electronic format.4Illinois General Assembly. Illinois Code 815 ILCS 333 – Uniform Electronic Transactions Act Give signed copies to the sublessor, the sublessee, and the landlord before the keys change hands.
Handling a Security Deposit from Your Sublessee
Collecting a deposit from your sublessee puts you in the landlord’s seat for deposit-handling purposes, and Illinois has specific rules depending on the building and its location.
Statewide: Buildings with Five or More Units
The Security Deposit Return Act (765 ILCS 710) applies to residential buildings with five or more units. If you keep any part of the deposit for damage, you must deliver an itemized statement with paid receipts or cost estimates within 30 days after move-out. If you don’t provide a statement, you must return the full deposit within 45 days.5Illinois General Assembly. Illinois Code 765 ILCS 710 – Security Deposit Return Act A separate statute, the Security Deposit Interest Act (765 ILCS 715), requires interest payments on deposits held six months or more in buildings with 25 or more units, with willful refusal exposing the holder to damages equal to the entire deposit plus costs and fees.7Illinois General Assembly. Illinois Code 765 ILCS 715 – Security Deposit Interest Act
Chicago Deposit Rules
Chicago adds stricter requirements under MCC 5-12-080. Deposits must be held in a federally insured, interest-bearing account at an Illinois financial institution, kept separate from your own funds. You must give the sublessee a receipt at the time of collection showing the amount, the date, a description of the unit, and the name and signature of the person who took the money. The deposit plus any accrued interest must be returned within 45 days after the sublessee vacates.6American Legal Publishing. Municipal Code of Chicago – 5-12-080 Security Deposits
Sublessors in covered buildings or inside Chicago who casually accept a deposit over Venmo without thinking about these obligations are exposed to real liability. Handle it like a professional landlord or don’t collect a deposit at all.
Lead Paint Disclosure for Pre-1978 Buildings
Federal law puts the lead-based paint disclosure duty on anyone leasing a unit built before 1978, which includes sublessors. Under 42 U.S.C. ยง 4852d, you must give the sublessee the EPA pamphlet “Protect Your Family From Lead in Your Home,” disclose any known lead paint or hazards, share any available inspection reports, and attach a lead warning statement to the sublease.8Office of the Law Revision Counsel. 42 USC 4852d – Disclosure of Information Concerning Lead Upon Transfer of Residential Property The EPA updated the pamphlet in January 2026 to reflect new dust-lead action levels; older versions remain usable with a supplemental sheet.9US EPA. Protect Your Family from Lead in Your Home – Real Estate Disclosure Keep signed copies for at least three years.10US EPA. Real Estate Disclosures about Potential Lead Hazards The rule does not apply to post-1977 construction, zero-bedroom units like lofts (unless a child under six lives there), or leases of 100 days or fewer with no renewal option.
What You Stay Liable For After the Sublease Starts
This is where most sublessors get burned. Subleasing does not release you from your original lease. If your sublessee stops paying, the landlord collects from you, not from them. If your sublessee damages the unit, the landlord bills you. The sublessee owes you under the sublease; you owe the landlord under the master lease. Those are two separate contracts, and the landlord has no direct claim against the sublessee unless the paperwork specifically creates one.
For injuries to visitors inside the unit, Illinois generally assigns liability to whoever is in possession, which usually means the sublessee. The exception runs the other way when the sublease or master lease assigns repair and maintenance duties to you, because keeping those duties can keep the liability with you too.
Screen your sublessee the way you’d want to be screened. Requiring the sublessee to carry renter’s insurance with liability coverage is not legally required in Illinois, but you can make it a condition of the sublease. Given that your credit and rental history ride on this person’s behavior for the rest of the term, it’s one of the cheapest protections you can build in.
Evicting a Sublessee Who Won’t Pay
If your sublessee stops paying or breaks the sublease, you have the same tools any landlord has under the Forcible Entry and Detainer Act (735 ILCS 5/9-101 et seq.). You cannot change the locks, cut off utilities, or physically remove them. Every eviction goes through court.11Illinois General Assembly. Illinois Code 735 ILCS 5/9-102 – When Action May Be Maintained
For unpaid rent, start with a written five-day notice stating the amount owed and warning that the sublease will terminate if the full balance isn’t paid within at least five days. Full payment within that window stops the eviction. Partial payment doesn’t, and accepting a partial payment can undermine your ability to enforce the notice.12Illinois General Assembly. Illinois Code 735 ILCS 5/9-209 – Demand for Rent The notice can be handed to the sublessee, left with someone at least 13 years old who lives in the unit, or sent by certified or registered mail. If payment doesn’t come, file in the circuit court where the property sits. For non-rent violations, a 10-day notice is typically required. Throughout this process, your rent obligation to the landlord keeps running.
Taxes on Sublease Income
Rent your sublessee pays you is taxable income, even if you pass it straight through to your own landlord. The IRS treats any payment received for the use of property as rental income, including sublease payments.13Internal Revenue Service. Tips on Rental Real Estate Income, Deductions and Recordkeeping Report it on Schedule E (Form 1040).14Internal Revenue Service. Topic No. 414 – Rental Income and Expenses
You can deduct the expenses tied to the sublease. The rent you pay your own landlord for the subleased unit is generally deductible against sublease income, along with utilities you cover and reasonable upkeep costs during the sublease term. If the sublessee pays you in services or property instead of cash, the fair market value of what you receive is income.
Deposits work differently. A deposit you plan to return is not income when you receive it. The moment you keep any portion of it, whether for unpaid rent or for damage, that amount becomes taxable income in the year you keep it.13Internal Revenue Service. Tips on Rental Real Estate Income, Deductions and Recordkeeping Casual sublessors miss this constantly, and it turns into a surprise at tax time.