Illinois landlord and tenant rules
Seayora publishes 7 Illinois rules, covering contractor sales tax, notice periods, security deposits. Every one is generated from the statute it cites — the same rule Seayora's own deadline engine enforces on a live tenancy — and carries the date it was last checked.
Illinois at a glance
| Rule | Illinois |
|---|---|
| Do contractors charge sales tax in Illinois? | Consumer of materials |
| How many days does a tenant get to pay late rent in Illinois? | 5 days |
| How much notice does a landlord have to give before entering in Illinois? | 48 hours |
| How much notice does a landlord have to give before raising the rent in Illinois? | 30 / 60 / 120 days by tenancy length |
| How much notice must a landlord give to end a tenancy in Illinois? | 30 / 60 / 120 days by tenancy length |
| Does a landlord have to pay interest on a security deposit in Illinois? | Interest required on buildings with 25+ units held 6+ months; Chicago RLTO applies its own rate. |
| How long does a landlord have to return a security deposit in Illinois? | 45 days |
Contractor sales tax in Illinois
Do contractors charge sales tax in Illinois?
In Illinois a contractor is treated as the CONSUMER of the materials they build into real property. That means the contractor pays sales tax when they buy the materials, and does not add sales tax to the customer's invoice for that work — the tax is already inside the price. Illinois also has county, city or special-district rates on top of the state rate, so the rate depends on where the job site is, not where the contractor is based. Source: 86 Ill. Adm. Code 130.1940 (construction contractors incur Use Tax on materials permanently affixed to real estate).
Full answer and the checkable figures.
Notice periods in Illinois
How many days does a tenant get to pay late rent in Illinois?
In Illinois, a landlord must give a written demand and allow 5 days to pay before starting a nonpayment case. This is 735 ILCS 5/9-207, 9-209; Chicago RLTO § 5-12-130.
State law: 30 days for a month-to-month tenancy. Chicago RLTO: 30 / 60 / 120 days by tenancy length for non-renewal or a rent increase, and 2 days' entry notice. Late rent: 5-day notice.
Full answer and the checkable figures.
How much notice does a landlord have to give before entering in Illinois?
In Illinois, a landlord must give 48 hours notice before entering an occupied rental, other than in an emergency. This is 735 ILCS 5/9-207, 9-209; Chicago RLTO § 5-12-130.
State law: 30 days for a month-to-month tenancy. Chicago RLTO: 30 / 60 / 120 days by tenancy length for non-renewal or a rent increase, and 2 days' entry notice. Late rent: 5-day notice.
Full answer and the checkable figures.
How much notice does a landlord have to give before raising the rent in Illinois?
In Illinois, the notice a landlord must give before a rent increase depends on how long the tenant has lived there: Less than 6 months — 30 days; 6 to 36 months — 60 days; 36 months or more — 120 days. This is 735 ILCS 5/9-207, 9-209; Chicago RLTO § 5-12-130.
State law: 30 days for a month-to-month tenancy. Chicago RLTO: 30 / 60 / 120 days by tenancy length for non-renewal or a rent increase, and 2 days' entry notice. Late rent: 5-day notice.
Full answer and the checkable figures.
How much notice must a landlord give to end a tenancy in Illinois?
In Illinois, the notice required to end a tenancy or decline to renew depends on how long the tenant has lived there: Less than 6 months — 30 days; 6 to 36 months — 60 days; 36 months or more — 120 days. This is 735 ILCS 5/9-207, 9-209; Chicago RLTO § 5-12-130.
State law: 30 days for a month-to-month tenancy. Chicago RLTO: 30 / 60 / 120 days by tenancy length for non-renewal or a rent increase, and 2 days' entry notice. Late rent: 5-day notice.
Full answer and the checkable figures.
Security deposits in Illinois
Does a landlord have to pay interest on a security deposit in Illinois?
Yes. Illinois requires a landlord to pay the tenant interest on a security deposit. Interest required on buildings with 25+ units held 6+ months; Chicago RLTO applies its own rate. The deposit itself must be returned within 45 days of the end of the tenancy. This is 765 ILCS 710/1; 765 ILCS 715/1.
Full answer and the checkable figures.
How long does a landlord have to return a security deposit in Illinois?
In Illinois, a landlord has 45 days after the tenancy ends to return the security deposit, together with an itemised statement of any deductions. 30 days to deliver the itemized statement, 45 days to return the balance (buildings with 5+ units). Illinois also requires interest to be paid on the deposit: Interest required on buildings with 25+ units held 6+ months; Chicago RLTO applies its own rate. This is 765 ILCS 710/1; 765 ILCS 715/1.
Full answer and the checkable figures.
Sources
- 735 ILCS 5/9-207, 9-209; Chicago RLTO § 5-12-130
- 765 ILCS 710/1; 765 ILCS 715/1
- 86 Ill. Adm. Code 130.1940 (construction contractors incur Use Tax on materials permanently affixed to real estate).
This is a summary of a published statute, not legal advice. Rules change, local ordinances can add to them, and the terms of a specific lease may differ. Check the citation and speak to a lawyer before acting.
How Seayora uses these rules
Seayora computes the deadline this rule sets from the tenancy’s own dates, shows it on the lease and the deposit statement, and reminds the landlord before it falls due — so the answer above is not reference material sitting beside the product, it is the rule the product enforces.
Compare Illinois with every other state
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- How the contractor is treated in all 51 states
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- Notice before a rent increase in all 23 states
- How the interest works in all 14 states
- Maximum deposit in all 28 states
- Deadline to return the deposit in all 51 states
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