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
Colorado landlord deadline calendar for 2027
Every dated deadline in 2027 from the verified federal, Colorado 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 Colorado 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.
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 Colorado 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
- Return the deposit, or a written statement of the reasons for keeping it, within 30 days (lease may allow up to 60): Within 30 days after move-out (60 days for a written lease that allows longer (maximum))
- Give the tenant a signed copy of the lease within 7 days of signing; notify tenants within 1 business day if the landlord or agent changes: Within 7 days after the lease starts
- Rent increase: 60 days' written notice where there is no written lease; no more than one increase in any 12 months: At least 60 days before the rent increase takes effect
- Notice to terminate a tenancy: 91, 28, 21, 3 or 1 days depending on the length of the tenancy: At least 91 days before the lease ends (91 days for lease term 1 year or more; 28 days for lease term 6 months to under 1 year; 21 days for lease term 1 to under 6 months; 3 days for lease term 1 week to under 1 month, or at will; 1 days for lease term under 1 week)
- 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)
- Unpaid rent: a written 10-day demand to pay or leave before an eviction can be filed: At least 10 days after a written demand for the rent or possession is served
- Late fees: only after rent is at least 7 days overdue, capped at $50 or 5% of the past-due rent (whichever is greater), and only if the lease discloses it: A late fee may be charged only once rent is overdue by at least 7 days
- 24 hours' notice before entering to repair a habitability condition: At least 24 hours before entering to repair a habitability condition (not required for an imminent threat)
- Warranty of habitability: respond and start fixing within 24 hours of notice of an uninhabitable condition: Within 24 hours after notice of a condition that makes the unit uninhabitable or threatens life, health or safety (72 hours in an environmental public health event)
Denver
- Give the tenant Denver's Tenant Rights and Resources document at lease signing and with any rent demand: When the lease starts
- Residential rental property license: required for rentals of 30+ days; valid 4 years; renew up to 90 days before expiry: Every 4 years from the license issue; apply within the 90 days before it expires
- Inspection by a certified inspector within 90 days before each license application or renewal: Every 4 years from the license issue; apply within the 90 days before it expires
Your dates
| Date | Rental 1 | Rental 2 | Rental 3 |
|---|---|---|---|
| Lease start date | |||
| Move-out date | |||
| Rent increase effective date | |||
| Lease end date | |||
| Last license, registration or inspection date |