Not legal advice. This is a free reference compiled from official government sources. Laws change and local details matter. Confirm every deadline with the official source or a licensed attorney before you rely on it.
Last verified: · Confidence: medium
Illinois landlord deadline calendar for 2027
Every dated deadline in 2027 from the verified federal, Illinois and local rules on this site, grouped by month. Each item shows who it applies to, its official source, the date it was last verified and our confidence. Dates we move for weekends or holidays, or roll forward from a yearly pattern, are labeled as computed. Rules not yet verified are left out.
Federal and Illinois statewide dates
January 2027
- Federal estimated tax payment #4 due January 15 (for the previous tax year) Computed date
Computed: January 15, 2027 is a Friday and not a legal holiday, so no change. Base rule:If any payment date falls on a Saturday, Sunday, or legal holiday, use the next business day.
February 2027
- File and furnish Form 1099-NEC for 2026 contractor payments of $2,000+ Computed date
Computed: January 31, 2027 is a Sunday, so the IRS next-business-day rule moves it to Monday, February 1, 2027. Base rule:If any date shown falls on a Saturday, Sunday, or legal holiday in the District of Columbia or where the return is to be filed, the due date is the next business day.
- Furnish Form 1099-MISC to recipients for 2026 rents and other payments of $2,000+ Computed date
Computed: January 31, 2027 is a Sunday, so the IRS next-business-day rule moves it to Monday, February 1, 2027. Base rule:If any date shown falls on a Saturday, Sunday, or legal holiday in the District of Columbia or where the return is to be filed, the due date is the next business day.
March 2027
- File Form 1099-MISC with the IRS for 2026 payments (February 28 on paper, March 31 if e-filed) Computed date
Computed: February 28, 2027 is a Sunday, so the IRS next-business-day rule moves it to Monday, March 1, 2027. Base rule:If any date shown falls on a Saturday, Sunday, or legal holiday in the District of Columbia or where the return is to be filed, the due date is the next business day.
April 2027
- Federal estimated tax payment #1 due April 15 Computed date
Computed: Computed from the yearly April 15 pattern; the official schedule we quote lists April 15, 2026. April 15, 2027 is a Thursday and not a legal holiday, so no change. Base rule:If any payment date falls on a Saturday, Sunday, or legal holiday, use the next business day.
- Report rental income/expenses on Schedule E with Form 1040 Computed date
Computed: April 15, 2027 is a Thursday and not a legal holiday, so no change. Base rule:If day 15 falls on a Saturday, Sunday or legal holiday, the due date is delayed until the next business day.
June 2027
- Federal estimated tax payment #2 due June 15 Computed date
Computed: Computed from the yearly June 15 pattern; the official schedule we quote lists June 15, 2026. June 15, 2027 is a Tuesday and not a legal holiday, so no change. Base rule:If any payment date falls on a Saturday, Sunday, or legal holiday, use the next business day.
September 2027
- Federal estimated tax payment #3 due September 15 Computed date
Computed: Computed from the yearly September 15 pattern; the official schedule we quote lists September 15, 2026. September 15, 2027 is a Wednesday and not a legal holiday, so no change. Base rule:If any payment date falls on a Saturday, Sunday, or legal holiday, use the next business day.
Local dates in Illinois
These apply only to rentals in the place named, in addition to the dates above. A city or county rule can replace a statewide rule; see each place's page.
Chicago
Deadlines that depend on your own dates or events
These rules have no fixed calendar date: they count from a lease date, a move-out, a license date or an event. The calendar builder dates them for your rental.
Federal and Illinois statewide
- Signed lead disclosure attachment with lease; keep for 3 years: Keep the signed disclosure for at least 3 years from the lease start; the date shown is the earliest you may discard it
- Itemized damage statement with receipts within 30 days after move-out (to keep any deposit for damage): Within 30 days after move-out
- Return the full deposit within 45 days of move-out if no damage statement was sent: Within 45 days after move-out
- Deposit interest for buildings/complexes with 25+ units: pay within 30 days after each 12-month rental period: Within 30 days after each lease anniversary
- Carbon monoxide alarms within 15 feet of sleeping rooms; batteries working at move-in; written information: When the lease starts
- Smoke detectors installed, batteries working at move-in, written testing information to the tenant: When the lease starts
- Flood disclosure before signing (FEMA flood zone, known flooding; lower-level units: floods in last 10 years): When the lease starts
- Notice to end a periodic tenancy: 7 days (week-to-week), 30 days (month-to-month), 60 days (year-to-year): At least 60 days before the lease ends (7 days for week-to-week tenancy; 30 days for month-to-month (any term under one year) tenancy; 60 days for year-to-year tenancy)
- Lead-based paint disclosure and EPA pamphlet before lease signing (pre-1978 housing): Before the tenant is obligated under the lease (before signing / before accepting an offer to lease)
- Before leasing pre-1978 units: give IDPH lead brochure; disclose any prior lead mitigation notice before renewal: Before entering into a lease (brochure); before renewing a lease for a unit with an outstanding mitigation notice
- Give the written utility-allocation formula before billing tenants for master-metered utilities: Before demanding any payment for a share of master-metered utilities
- Leases from January 1, 2027: all non-optional fees on page 1; application fee capped at $50; many fees banned: For every lease entered into after the January 1, 2027 effective date
- 10-day notice to quit for other lease violations: After a default in lease terms other than rent: 10 days' notice to quit
- 5-day written demand for unpaid rent before eviction: After rent is due: written demand giving at least 5 days after service to pay
Chicago
- Itemized damage statement with receipts within 30 days after move-out: Within 30 days after move-out
- Return deposit and interest within 45 days after move-out (7 days after a fire-related termination): Within 45 days after move-out
- Hold deposit in a federally insured Illinois account; name the bank in the lease or within 14 days: Within 14 days after the lease starts
- Pay deposit interest within 30 days after each 12-month rental period (2026 rate 0.01%): Within 30 days after each lease anniversary
- Attach the City's RLTO Summary (and security deposit interest summary) to every lease and renewal offer: When the lease starts
- Disclose code violations (past 12 months), pending code cases and utility shutoff notices before each lease or renewal: When the lease starts
- Disclose owner/manager and agent for notices in writing at or before move-in: When the lease starts
- Give the Health Department bed bug brochure before each lease or renewal: When the lease starts
- Fair Notice: 30/60/120 days before a rent increase, by length of tenancy: At least 120 days before the rent increase takes effect (30 days for occupancy under 6 months; 60 days for occupancy 6 months to 3 years; 120 days for occupancy over 3 years)
- Fair Notice: 30/60/120 days before ending a periodic tenancy or not renewing, by length of tenancy: At least 120 days before the lease ends (30 days for occupancy under 6 months; 60 days for occupancy 6 months to 3 years; 120 days for occupancy over 3 years)
- Change or rekey the unit lock before each new tenant moves in (Cook County): When the lease starts
- Signed security deposit receipt when the deposit is received: At the time the security deposit is received
- Tell all tenants in writing within 7 days of being served a foreclosure complaint: Within 7 days after being served a foreclosure complaint (and before any new lease is signed)
- Two days' notice before entering (8 a.m. to 8 p.m. presumed reasonable): At least 2 days before each non-emergency entry
Your dates
| Date | Rental 1 | Rental 2 | Rental 3 |
|---|---|---|---|
| Lease start date | |||
| Move-out date | |||
| Lease end date | |||
| Rent increase effective date |