Illinois Rent Increase Laws: The Landlord and Tenant Guide
No Statutory Cap · Statewide Preemption · 30-Day Month-to-Month Notice · Chicago 30-60-120 Tiers · Retaliation Limits
Illinois is a free-market rent state with a twist. There is no statutory cap on how much a landlord may raise the rent, and local rent control is preempted statewide, so no Illinois city may impose one either. But “no cap” is not “no rules.” The tenancy type controls when you may raise rent at all, a month-to-month increase rides on the 30-day termination notice under section 9-207 of the Code of Civil Procedure, and Chicago, Cook County, and Evanston layer on much longer, tiered notice requirements. On top of all of that sit the Landlord Retaliation Act and source-of-income protections. Get the timing and the notice right and your increase holds; miss one and a tenant can refuse the new rent and use the defect against you.
The stakes are practical. An increase served on the wrong notice, imposed mid-term without authority, or timed to punish a tenant is not just risky — it is unenforceable, and an improper increase can become a tenant defense if you later try to evict for nonpayment of the raised rent under the Illinois eviction notice rules. Because local ordinances change on their own schedules and the statewide preemption is under active legislative debate, treat every rule in this guide as a starting point and verify the current law for your county and city before you serve anything.
Below, a detailed overview video summarizes the Illinois framework; the sections that follow break down each piece — why there is no cap, the statewide preemption of rent control, when you may raise rent at all, the statewide 30-day notice mechanism, the Chicago Fair Notice tiers, the Cook County and Evanston overlays, retaliation and source-of-income limits, and a step-by-step landlord playbook — plus an Illinois-specific FAQ.
Illinois Rent Increase Rules at a Glance
Statewide Cap
None — free-market rent
Local Rent Control
Preempted statewide (50 ILCS 825)
State Notice
30 days month-to-month (9-207)
Chicago Notice
30 / 60 / 120 days by tenure
No Statutory Cap: The Illinois Free-Market Rule
The starting point for Illinois rent-increase law is what the state does not do: it imposes no statutory cap on how much or how often a landlord may raise the rent. There is no percentage ceiling like California’s 5-percent-plus-inflation formula and no annual limit tied to a price index. For housing that is not inside a special program, the dollar figure on a lawful increase is set by the landlord and the market, not by a statute.
That does not mean anything goes. Three separate limits survive the absence of a cap, and every lawful Illinois increase has to clear all three: the tenancy type decides whether you may raise the rent at this moment at all; the notice the tenancy or the local ordinance requires decides how far ahead you must act; and the bars on retaliation and discrimination decide whether an otherwise-valid increase is nonetheless unlawful because of why or how it was imposed. The rest of this guide walks each of the three.
“No cap” is a floor for disputes, not a shield
Because Illinois has no cap, tenants rarely win by arguing the number is too high. They win on process: an increase served with too little notice, imposed mid-term without a lease clause, or timed right after a repair request. That is where Illinois rent-increase fights are actually decided, so the discipline in this guide is about timing, documentation, and delivery — not about staying under a percentage.
Takeaway
Illinois has no statutory cap on the amount or frequency of a rent increase. The limits that remain are the tenancy type, the required notice, and the bars on retaliation and discrimination — and those, not a percentage, are where increases are won or lost.
Rent Control Is Preempted Statewide
Illinois goes a step further than simply declining to set a cap: it forbids its own cities and counties from setting one. The Rent Control Preemption Act, codified at 50 ILCS 825, provides that a unit of local government may not enact, maintain, or enforce an ordinance or resolution that would control the amount of rent charged for leasing private residential or commercial property. In plain terms, no Illinois municipality — not Chicago, not any suburb — may lawfully impose rent control while the Act stands.
This is the single most misunderstood point in Illinois rent law, and it is where the older version of this page was simply wrong. Claims circulate online that the preemption was “repealed” — that is not correct. As of this update, the Rent Control Preemption Act remains in force. It has never been repealed.
Repeal efforts exist, but the preemption still stands — verify before you rely
This is an actively debated area. Bills have been introduced in the General Assembly to repeal the preemption or to let the voters of a local government approve rent control by referendum, and the Chicago City Council has repeatedly asked the state to lift the ban. None of those efforts had become law as of this writing, so the statewide preemption still governs. Because the status could change, confirm the current state of 50 ILCS 825 and any local ordinance before you act on the assumption that rent control does or does not exist.
The practical consequence for a landlord is straightforward: outside of a special affordable-housing program, no local government in Illinois can tell you the maximum rent or the maximum increase. What local governments can and do regulate is the process — chiefly how much notice you must give before an increase or a non-renewal — which is exactly what Chicago, Cook County, and Evanston have done. Those are notice rules, not caps, and they are covered below.
Takeaway
The Rent Control Preemption Act (50 ILCS 825) bars every Illinois city and county from adopting rent control, and it remains in force — it was not repealed. Repeal and referendum bills have been filed but none has passed. Local governments may regulate notice, not the rent amount. Verify current status before relying on it.
When You Can Raise the Rent at All
The absence of a cap only matters once you actually have the right to change the rent. That right depends entirely on the tenancy.
During a Fixed-Term Lease: Generally Locked
While a fixed-term lease is running, the rent is set at the agreed amount for the whole term. You cannot raise it mid-term unless the lease itself contains an explicit escalation clause that permits the change. Absent that clause, the tenant is entitled to the agreed rent through the end of the term, and a purported mid-lease increase is unenforceable no matter how it is served. The ordinary time to reset the rent on a fixed-term tenant is at renewal, when a new term begins; if the tenant instead wants to leave early, that is governed separately by the Illinois lease termination rules.
On a Month-to-Month Tenancy: Going Forward With Notice
A month-to-month tenancy is where most Illinois increases happen. Here the landlord changes the rent going forward, and the change takes effect only after the required notice period runs. Because Illinois has no statute that names a notice period for a rent increase as such, the notice is borrowed from the termination rule: the landlord offers the new rent and, if the tenant will not agree, may end the tenancy on the statutory notice. That mechanism is the next section.
A mid-term increase without authority is void
Trying to raise rent partway through a fixed-term lease with no escalation clause does not simply fail quietly — the increase is unenforceable, and a tenant who keeps paying the original rent is in the right. Do not treat a tenant’s silence as agreement. Wait for renewal, or use the lawful month-to-month process, before adjusting the rent.
Takeaway
You may raise rent at renewal or, on a month-to-month tenancy, going forward with proper notice — but never mid-term on a fixed lease unless the lease expressly allows it. The tenancy type decides whether you even have the authority; notice decides the timing.
The Statewide Notice: Section 9-207
Illinois has no rent-increase-specific notice statute. What it has is a termination-notice statute, and that is what governs a month-to-month increase in practice. Under section 9-207 of the Code of Civil Procedure, 735 ILCS 5/9-207, a landlord may terminate a tenancy from month to month by giving at least 30 days’ written notice, and a week-to-week tenancy on at least 7 days’ written notice; a separate section, 735 ILCS 5/9-205, requires at least 60 days’ written notice to end a tenancy from year to year.
Because there is no separate rent-increase clock, the 30-day termination notice is the practical floor for raising rent on a month-to-month tenant: the landlord proposes the new rent, and if the tenant will not accept it, the landlord may end the tenancy on that notice. The tenant then either agrees to the new rent and stays, or the tenancy ends. The 30 days must be measured to the rent period — a notice meant to make a new rent effective on the first of a month generally has to be served at least 30 days before that date.
| Tenancy type | Statewide written notice (sections 9-207 and 9-205) | What it means for a rent increase |
|---|---|---|
| Week to week | At least 7 days | New rent going forward on 7 days’ notice, timed to the week |
| Month to month | At least 30 days | The usual increase floor — offer the new rent, or end the tenancy on 30 days |
| Year to year | At least 60 days (9-205) | Reset at renewal on 60 days’ notice unless the lease sets more |
What a Proper Notice Contains and How to Serve It
A defensible Illinois rent-increase notice is in writing and states, at minimum, the tenant’s name and the property address, the current rent, the new rent, and the effective date, with enough lead time to satisfy section 9-207 and any local ordinance. A verbal announcement, or a text the tenant never agreed to accept as a delivery method, does not reliably change the rent, and the old rent continues until proper notice is given. Serve it by a provable method — certified mail with return receipt, or personal delivery with a signed acknowledgment — and keep a copy of both the notice and the proof of delivery.
Longer local periods override the state floor
Section 9-207 sets a statewide floor, not a ceiling. Where a local ordinance — Chicago, Cook County, Evanston — requires a longer notice period, the longer period controls, and a notice that satisfies the state minimum can still fall short of the city rule. Always check the local requirement for the property’s exact address before you rely on 30 days.
Takeaway
On a month-to-month tenancy the practical floor is 30 days’ written notice under section 9-207 of the Code of Civil Procedure (735 ILCS 5/9-207) — 7 days week to week, and 60 days year to year under section 9-205 — measured to the rent period. Put it in writing, serve it by a provable method, and use the longer local period where one applies.
Chicago: The Fair Notice Tiers
Chicago is the biggest local overlay in the state. The city’s Residential Landlord and Tenant Ordinance, as amended by the Fair Notice provisions at section 5-12-130 of the Municipal Code, requires tiered advance written notice before a landlord raises the rent or declines to renew a lease. The tier is set by how long the tenant has continuously lived in the unit, and the longer the tenancy, the more notice you owe.
| Length of tenancy | Minimum written notice (Chicago) | Applies to |
|---|---|---|
| Less than 6 months | At least 30 days | Rent increase and non-renewal |
| 6 months to 3 years | At least 60 days | Rent increase and non-renewal |
| More than 3 years | At least 120 days | Rent increase and non-renewal |
The same three tiers govern both a rent increase and a decision not to renew — the city treats them as the same category of change that a tenant deserves time to plan around. The tiers reach broadly across Chicago rentals, and coverage can include smaller and owner-occupied buildings that the older RLTO exempted, so do not assume a small building is outside the rule. Confirm current coverage for the specific property.
Short notice buys the tenant time at the old rent
If a Chicago landlord fails to give the full required notice, the tenant generally may remain in the unit for the balance of the required notice period, and the rent stays at the prior rate during that time. In other words, under-noticing an increase does not just delay it — it locks in the old rent for the whole period you should have given. Give the full 30, 60, or 120 days from the start.
Takeaway
In Chicago, a rent increase or non-renewal needs 30, 60, or 120 days’ written notice by how long the tenant has lived there under section 5-12-130 of the Municipal Code. Under-noticing lets the tenant stay at the old rent for the balance of the period. Use the tier that matches the tenancy and confirm coverage for the address.
Cook County, Evanston, and Other Local Overlays
Chicago is not the only Illinois jurisdiction with its own notice rules, and the rules do not overlap — each jurisdiction has one governing ordinance, so the first task for any suburban Cook County property is to figure out which one applies.
The Cook County RTLO
Suburban Cook County has its own Residential Tenant and Landlord Ordinance (the RTLO), which covers unincorporated areas and many suburbs that have not opted out. Its notice structure differs from Chicago’s tiers: rather than a 30-60-120 ladder, the RTLO generally requires a flat 60 days’ written notice before a rent increase or a non-renewal, with a longer period available to the tenant if the landlord gives short notice. Critically, the Cook County RTLO does not apply inside the City of Chicago, in Evanston, or in Mount Prospect, because each of those has its own ordinance.
Evanston and Home-Rule Municipalities
Evanston is one example of a home-rule municipality that runs its own landlord-tenant ordinance instead of Chicago’s or the county’s, with its own notice requirements. Other home-rule cities and villages around the state may have adopted local notice rules as well. None of these ordinances may cap the rent — the statewide preemption forbids that — but they can and do set longer notice periods and extra procedures for a lawful increase.
Figure out which ordinance governs before anything else
The single most common Chicagoland mistake is applying Chicago’s tiers to a suburb that runs under the Cook County RTLO, or the county’s 60-day rule to a property that is actually inside Chicago or Evanston. They are mutually exclusive by geography. Pin down the property’s municipality first, read that jurisdiction’s current ordinance, and use its notice period — then fall back to the statewide section 9-207 floor only where no local ordinance applies.
Takeaway
Outside Chicago, a Cook County property may fall under the county RTLO’s flat 60-day notice, while Evanston and other home-rule cities run their own ordinances. The county rule does not apply in Chicago, Evanston, or Mount Prospect. None may cap rent — identify the governing ordinance by address, then use its notice period.
Retaliation: The Landlord Retaliation Act
Even with no cap and a short statewide notice, an increase that clears those hurdles can still be unlawful if it is retaliatory. Illinois modernized this area recently: the old Retaliatory Eviction Act was repealed and replaced, effective January 1, 2025, by the Landlord Retaliation Act, 765 ILCS 721. The new Act is broader than the one it replaced, and it names rent increases specifically.
What Counts as Protected Activity
Under the Landlord Retaliation Act, a landlord may not raise rent, terminate or refuse to renew a tenancy, or reduce services in retaliation for a tenant’s protected activity. Protected activity is defined broadly and includes complaining to a government agency about a building or health code violation, requesting a repair the law or the lease requires, contacting or seeking help from a community organization, testifying in a proceeding about the condition of the premises, and organizing or joining a tenants’ union. This is a meaningful expansion over the repealed Act, which reached a narrower set of complaints.
The One-Year Presumption and the Remedies
The Act creates a rebuttable presumption: if the landlord’s adverse action — including a rent increase — occurs within one year after the tenant’s protected activity, retaliation is presumed, and the burden shifts to the landlord to prove a legitimate, non-retaliatory business reason. A tenant who proves retaliation may recover an amount equal to the greater of two months’ rent or two times the damages sustained, plus reasonable attorney’s fees, along with relief such as terminating the lease and recovering possession. The safest practice is to time increases to the ordinary schedule and to document the market and cost reasons behind the number, so a routine increase never looks like a reprisal.
Consistency is your best defense
Increases applied evenly across comparable units on a regular schedule are far easier to defend than a one-off increase aimed at a single tenant. A selectively applied hike, or one that lands right after a complaint, invites a retaliation presumption — and under the one-year window that presumption reaches back a long way. Document the business reason for every increase and keep the timing clean.
Takeaway
The Landlord Retaliation Act (765 ILCS 721), effective January 1, 2025, bars a retaliatory rent increase and presumes retaliation when the increase lands within one year of protected activity. A tenant who prevails recovers the greater of two months’ rent or twice the damages plus fees. Time increases on schedule and document the reason.
Fair Housing and Source of Income
A rent increase, like any rental decision, cannot be used to discriminate. Beyond the retaliation bar, two overlapping fair-housing regimes apply to every Illinois landlord within their scope.
Protected Classes
An increase cannot target a protected class under the federal Fair Housing Act and the Illinois Human Rights Act, 775 ILCS 5 — including race, color, religion, national origin, sex, familial status, disability, and the additional classes Illinois recognizes. Setting a steeper increase, or a different schedule, for one tenant because of a protected characteristic is housing discrimination even where the number itself would otherwise be lawful.
Source of Income Is Now Protected Statewide
Since January 1, 2023, the Illinois Human Rights Act protects source of income as a class, which for renters means a landlord subject to the Act generally may not refuse to rent to, or set different rent or terms for, a tenant because they intend to pay with a Housing Choice Voucher (Section 8) or other lawful rental assistance. Raising or setting rent to push out or exclude a voucher holder, or advertising that vouchers are not accepted, can be source-of-income discrimination. Narrow exemptions exist — certain owner-occupied buildings, for example — so confirm whether the Act reaches your property before assuming you may treat voucher income differently.
Takeaway
An increase inside the law is still unlawful if it is discriminatory under the Fair Housing Act or the Illinois Human Rights Act (775 ILCS 5) — and since 2023 that includes targeting a lawful source of income like a Section 8 voucher. Apply increases by an objective, even-handed method to comparable units.
The Illinois Landlord Playbook
Put the whole framework into a repeatable sequence and a rent increase becomes routine instead of risky. Follow these steps every time.
Confirm the tenancy type and where you are in the term
A fixed-term lease locks the rent until it ends unless it has an escalation clause; a month-to-month can be adjusted going forward. Never attempt a mid-term increase without a lease clause that allows it.
Identify the governing ordinance by address
Determine whether the property is in Chicago, suburban Cook County under the RTLO, Evanston, another home-rule city, or an area with no local ordinance. That decides your notice period. None of them may cap the rent.
Use the longest applicable notice period
Start from the statewide floor — 30 days month-to-month under section 9-207, 60 days year-to-year under section 9-205 — then apply the longer local tier where one exists (Chicago’s 30, 60, or 120 days by tenure, Cook County’s 60 days, or Evanston’s rule). When in doubt, give more notice.
Serve a clear, dated written notice
State the current rent, the new rent, and the effective date in writing, measured to the rent period. Serve it by certified mail with return receipt or personal delivery with a signed acknowledgment.
Keep the timing clean and document everything
Keep the increase clear of any recent repair request or complaint so it cannot look retaliatory under the Landlord Retaliation Act. Keep a copy of the notice, proof of delivery, and a note of the market and cost reasons behind the number.
Need the notice itself?
A ready-to-fill notice keeps the required fields in place. See our free Illinois rent increase notice form, and the Illinois lease agreement form if you need an escalation clause or a fresh renewal term. Always tailor the numbers to your unit and verify current law.
Common Scenarios, Quickly Answered
✓ Usually Defensible
- Renewal increase with proper notice. A written notice before renewal, timed to the tenancy and the local ordinance, at a market-supported figure.
- Month-to-month raise on 30-day notice. A written 30-day notice under section 9-207 where no longer local period applies.
- Chicago increase on the right tier. A 60-day notice to a two-year Chicago tenant, or 120 days to a five-year tenant.
- Market reset at turnover. Setting a new market rent for a new tenant after the prior one moves out.
✕ Likely Unlawful
- Mid-term hike, no clause. Raising rent during a fixed lease with no escalation clause.
- Under-noticed increase. Fewer days than section 9-207 or the local tier requires — the old rent holds.
- Post-complaint increase. A raise within a year of a repair request or code complaint — a retaliation presumption.
- Voucher-driven raise. Setting a higher rent to exclude a Housing Choice Voucher holder — source-of-income discrimination.
Rent Increases Go Smoother With the Right Tenant
The tenants who fight every lawful increase are often the ones who show red flags on screening. Comprehensive credit, income, and eviction-history reports catch the mismatch before you ever sign a lease.
Frequently Asked Questions
How much can a landlord raise the rent in Illinois?
There is no statutory limit on the amount of a rent increase in Illinois. The state has no rent control and no percentage cap, so the dollar figure is generally up to the landlord and the market. What still constrains an increase is the tenancy type, since a fixed-term lease locks the rent until it ends unless the lease has an escalation clause; the notice the tenancy requires; and the bars on a retaliatory or discriminatory increase. Local rent control is preempted statewide, so no Illinois city may impose a cap. Chicago, Cook County, and some other jurisdictions add longer notice rules but not a cap. Verify current law before you set an increase.
Is there rent control in Illinois?
No. Local rent control is preempted statewide by the Rent Control Preemption Act, at 50 ILCS 825, which bars a unit of local government from enacting an ordinance that controls the amount of rent charged for private residential or commercial property. As of this writing the Act remains in force. There have been repeated legislative efforts to repeal or amend it, including bills that would let voters approve local rent control by referendum, but none had passed as of the update date. Confirm the current status before relying on it, because this is an actively debated area.
How much notice must an Illinois landlord give before raising rent?
Statewide, Illinois has no rent-increase-specific notice statute. On a month-to-month tenancy the practical floor is the 30-day written notice to terminate the tenancy under section 9-207 of the Code of Civil Procedure, 735 ILCS 5/9-207, because a landlord who wants a higher rent offers the new amount and, if the tenant will not agree, may end the tenancy on that notice. That 30-day notice must be timed to the rent period. A year-to-year tenancy requires 60 days under section 9-205. Chicago and some other jurisdictions require much longer, tiered notice. During a fixed-term lease the rent is locked and an increase waits for renewal. Confirm what your local ordinance requires.
What are the Chicago rent-increase notice rules?
Chicago’s Fair Notice provisions, at section 5-12-130 of the Municipal Code within the Residential Landlord and Tenant Ordinance, require tiered advance written notice before a rent increase or a non-renewal, scaled to how long the tenant has lived in the unit: at least 30 days when the tenancy has lasted less than 6 months, at least 60 days for 6 months to 3 years, and at least 120 days for more than 3 years. The same tiers apply to non-renewals and terminations. If the landlord gives short notice, the tenant may generally stay at the prior rent for the balance of the required period. Verify the current ordinance, including any owner-occupied exemption.
Can a landlord raise the rent in the middle of a lease in Illinois?
Generally no. During a fixed-term lease the rent is locked at the agreed amount for the whole term unless the lease itself contains an escalation clause that expressly permits a mid-term increase. Absent that clause the tenant is entitled to the agreed rent through the end of the term, and a purported mid-term increase is unenforceable. A landlord may raise rent at renewal or, on a month-to-month tenancy, going forward with proper notice.
Was the Illinois Rent Control Preemption Act repealed?
No. Despite persistent claims online that the preemption was repealed, the Rent Control Preemption Act at 50 ILCS 825 remains in force as of this update. Bills to repeal it or to let local voters approve rent control by referendum have been introduced in the General Assembly but have not become law. Because this is an actively debated topic and the status can change, confirm the current law before you rely on it.
Can an Illinois landlord raise rent in retaliation?
No. The Landlord Retaliation Act, at 765 ILCS 721, effective January 1, 2025, bars a landlord from raising rent, ending a tenancy, refusing to renew, or reducing services in retaliation for a tenant’s protected activity, such as complaining to a government agency, requesting a repair required by law or the lease, contacting a community organization, or organizing or joining a tenants’ union. If the adverse action follows the protected activity within one year, retaliation is presumed and the landlord must prove a legitimate, non-retaliatory reason. A tenant who prevails may recover the greater of two months’ rent or two times the damages, plus reasonable attorney’s fees. Time increases to the ordinary schedule and document the business reason.
Can an Illinois landlord refuse a Section 8 voucher or raise rent to avoid one?
Generally no. Since January 1, 2023, source of income is a protected class under the Illinois Human Rights Act, 775 ILCS 5, which means a landlord subject to the Act may not refuse to rent to, or set different rent or terms for, a tenant because they intend to pay with a Housing Choice Voucher or other lawful rental assistance. Setting a higher rent or a different schedule to push out or exclude a voucher holder can be source-of-income discrimination. Narrow exemptions exist, such as certain owner-occupied buildings, so confirm whether the Act applies to your property.
How often can a landlord raise rent in Illinois?
There is no statewide statutory limit on how often rent may be raised, because there is no rent control. In practice the tenancy type controls the timing: on a fixed-term lease the rent is locked and can change only at renewal, while on a month-to-month tenancy it can change going forward with the required notice. A local ordinance may add longer notice periods that lengthen the interval as a practical matter, but not a hard frequency cap. Confirm the local rule for the property.
Does an Illinois rent increase have to be in writing?
Practically, yes. While the statewide termination-notice statute does not spell out a delivery method for an ordinary increase, written notice is the only defensible practice, and Chicago and other ordinances require it in writing. A dated written notice that states the current rent, the new rent, and the exact effective date, served far enough ahead to satisfy the tenancy and any local timing, protects both sides. A verbal announcement or a text the tenant never agreed to accept does not reliably change the rent, and the old rent continues until proper notice is given. Keep a copy and proof of delivery.
What is the safest way for an Illinois landlord to raise rent?
Confirm the tenancy type and where you are in the term, since a fixed lease locks the rent until it ends unless it has an escalation clause. Check whether the property sits in Chicago, Cook County, Evanston, or another jurisdiction with its own longer notice tiers, and use the longest applicable period. Set the new rent by an objective, even-handed method and apply it consistently. Serve a clear dated written notice stating the current rent, the new rent, and the effective date, and keep proof of delivery. Keep the timing clear of any recent repair request or complaint so it cannot look retaliatory under the Landlord Retaliation Act. Verify current law before acting.
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