BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Adlega//Startup Tax Calendar 2027//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Startup tax calendar 2027 (Adlega)
X-WR-TIMEZONE:America/New_York
BEGIN:VEVENT
UID:adlega-taxcal-2027-01-2026-12-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20261215
DTEND;VALUE=DATE:20261216
SUMMARY:Q4 2026 corporate estimated tax (Form 1120)
DESCRIPTION:Fourth 2026 installment for C corps expecting $500 or more of t
 ax.\nSource: https://www.irs.gov/publications/p509\nAll dates: https://adl
 ega.com/blog/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-02-2027-01-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270115
DTEND;VALUE=DATE:20270116
SUMMARY:Q4 2026 individual estimated tax (Form 1040-ES)
DESCRIPTION:Founders with income not covered by withholding.\nSource: https
 ://www.irs.gov/pub/irs-dft/p509--dft.pdf\nAll dates: https://adlega.com/bl
 og/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-03-2027-02-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270201
DTEND;VALUE=DATE:20270202
SUMMARY:W-2 to employees + W-2/W-3 to SSA
DESCRIPTION:Jan 31 is a Sunday. Employers.\nSource: https://www.irs.gov/pub
 /irs-pdf/iw2w3.pdf\nAll dates: https://adlega.com/blog/startup-tax-calenda
 r-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-04-2027-02-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270201
DTEND;VALUE=DATE:20270202
SUMMARY:Form 1099-NEC to contractors and IRS ($2\,000+ paid in 2026)
DESCRIPTION:Threshold rose from $600 to $2\,000 for 2026 payments. Paper an
 d e-file same date.\nSource: https://www.irs.gov/pub/irs-pdf/i1099mec.pdf\
 nAll dates: https://adlega.com/blog/startup-tax-calendar-2027/\nNot tax ad
 vice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-05-2027-02-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270201
DTEND;VALUE=DATE:20270202
SUMMARY:Form 1099-MISC recipient copies\; Form 3921 to employees (2026 ISO 
 exercises)
DESCRIPTION:Recipient copies. IRS copies: Mar 1 paper\, Mar 31 e-file.\nSou
 rce: https://www.irs.gov/pub/irs-dft/p509--dft.pdf\nAll dates: https://adl
 ega.com/blog/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-06-2027-02-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270201
DTEND;VALUE=DATE:20270202
SUMMARY:Form 941 (Q4 2026) and Form 940 (2026)
DESCRIPTION:Feb 10 if every deposit was made on time and in full.\nSource: 
 https://www.irs.gov/pub/irs-dft/p509--dft.pdf\nAll dates: https://adlega.c
 om/blog/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-07-2027-02-16@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270216
DTEND;VALUE=DATE:20270217
SUMMARY:Form 1099-MISC recipient copies with box 8 or 10
DESCRIPTION:Feb 15 is Washington's Birthday.\nSource: https://www.irs.gov/p
 ub/irs-dft/p509--dft.pdf\nAll dates: https://adlega.com/blog/startup-tax-c
 alendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-08-2027-03-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270301
DTEND;VALUE=DATE:20270302
SUMMARY:Delaware annual report + franchise tax (2026)
DESCRIPTION:$50 filing fee\; $200 penalty plus 1.5%/month if late.\nSource:
  https://corp.delaware.gov/paytaxes/\nAll dates: https://adlega.com/blog/s
 tartup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-09-2027-03-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270301
DTEND;VALUE=DATE:20270302
SUMMARY:Paper Forms 1099-MISC and 3921 to IRS (with Form 1096)
DESCRIPTION:Feb 28 is a Sunday. Fewer than 10 information returns in total.
 \nSource: https://www.irs.gov/pub/irs-dft/p509--dft.pdf\nAll dates: https:
 //adlega.com/blog/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-10-2027-03-31@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270331
DTEND;VALUE=DATE:20270401
SUMMARY:E-filed Forms 1099-MISC and 3921 to IRS
DESCRIPTION:Source: https://www.irs.gov/pub/irs-dft/p509--dft.pdf\nAll date
 s: https://adlega.com/blog/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-11-2027-04-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270415
DTEND;VALUE=DATE:20270416
SUMMARY:Form 1120 for 2026 or Form 7004 extension\; pay tax
DESCRIPTION:Attach Form 6765 (Section G required for tax years beginning af
 ter 2025) and Form 5472 if 25% foreign-owned.\nSource: https://www.irs.gov
 /pub/irs-dft/p509--dft.pdf https://www.irs.gov/pub/irs-pdf/i6765.pdf https
 ://www.irs.gov/pub/irs-pdf/i5472.pdf\nAll dates: https://adlega.com/blog/s
 tartup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-12-2027-04-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270415
DTEND;VALUE=DATE:20270416
SUMMARY:Q1 2027 corporate estimated tax
DESCRIPTION:C corps expecting $500 or more of 2027 tax.\nSource: https://ww
 w.irs.gov/pub/irs-pdf/i1120.pdf\nAll dates: https://adlega.com/blog/startu
 p-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-13-2027-04-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270415
DTEND;VALUE=DATE:20270416
SUMMARY:California Form 100 (2026) and Q1 2027 CA estimate
DESCRIPTION:Only if registered or doing business in California. $800 minimu
 m franchise tax (not in first taxable year).\nSource: https://www.ftb.ca.g
 ov/forms/2025/2025-100-booklet.pdf https://www.ftb.ca.gov/forms/2026/2026-
 100-es.pdf\nAll dates: https://adlega.com/blog/startup-tax-calendar-2027/\
 nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-14-2027-04-30@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270430
DTEND;VALUE=DATE:20270501
SUMMARY:Form 941 (Q1 2027)\; FUTA deposit if over $500
DESCRIPTION:May 10 if every deposit was on time.\nSource: https://www.irs.g
 ov/pub/irs-dft/p509--dft.pdf\nAll dates: https://adlega.com/blog/startup-t
 ax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-15-2027-06-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270601
DTEND;VALUE=DATE:20270602
SUMMARY:Delaware franchise tax installment 40% (if 2027 tax $5\,000+)
DESCRIPTION:Source: https://delcode.delaware.gov/title8/c005/index.html\nAl
 l dates: https://adlega.com/blog/startup-tax-calendar-2027/\nNot tax advic
 e.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-16-2027-06-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270601
DTEND;VALUE=DATE:20270602
SUMMARY:Delaware LLC/LP/GP annual tax $400 (2026)
DESCRIPTION:Only for Delaware LLCs\, LPs\, GPs.\nSource: https://corp.delaw
 are.gov/alt-entitytaxinstructions/\nAll dates: https://adlega.com/blog/sta
 rtup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-17-2027-06-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270615
DTEND;VALUE=DATE:20270616
SUMMARY:Q2 2027 corporate estimated tax (federal and CA)
DESCRIPTION:Source: https://www.irs.gov/pub/irs-dft/p509--dft.pdf https://w
 ww.ftb.ca.gov/forms/2026/2026-100-es.pdf\nAll dates: https://adlega.com/bl
 og/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-18-2027-06-30@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270630
DTEND;VALUE=DATE:20270701
SUMMARY:Delaware foreign corporation annual report ($250)
DESCRIPTION:Only for non-Delaware corporations registered in Delaware.\nSou
 rce: https://corp.delaware.gov/paytaxes/\nAll dates: https://adlega.com/bl
 og/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-19-2027-08-02@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270802
DTEND;VALUE=DATE:20270803
SUMMARY:Form 941 (Q2 2027)\; FUTA deposit if over $500
DESCRIPTION:Jul 31 is a Saturday. Aug 10 if every deposit was on time.\nSou
 rce: https://www.irs.gov/pub/irs-dft/p509--dft.pdf\nAll dates: https://adl
 ega.com/blog/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-20-2027-09-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270901
DTEND;VALUE=DATE:20270902
SUMMARY:Delaware franchise tax installment 20% (if 2027 tax $5\,000+)
DESCRIPTION:Source: https://delcode.delaware.gov/title8/c005/index.html\nAl
 l dates: https://adlega.com/blog/startup-tax-calendar-2027/\nNot tax advic
 e.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-21-2027-09-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20270915
DTEND;VALUE=DATE:20270916
SUMMARY:Q3 2027 corporate estimated tax (federal and CA)
DESCRIPTION:Source: https://www.irs.gov/pub/irs-dft/p509--dft.pdf https://w
 ww.ftb.ca.gov/forms/2026/2026-100-es.pdf\nAll dates: https://adlega.com/bl
 og/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-22-2027-10-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20271015
DTEND;VALUE=DATE:20271016
SUMMARY:Extended Form 1120 for 2026
DESCRIPTION:Only if Form 7004 was filed by Apr 15.\nSource: https://www.irs
 .gov/pub/irs-dft/p509--dft.pdf\nAll dates: https://adlega.com/blog/startup
 -tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-23-2027-11-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20271101
DTEND;VALUE=DATE:20271102
SUMMARY:Form 941 (Q3 2027)\; FUTA deposit if over $500
DESCRIPTION:Oct 31 is a Sunday. Nov 10 if every deposit was on time.\nSourc
 e: https://www.irs.gov/pub/irs-dft/p509--dft.pdf\nAll dates: https://adleg
 a.com/blog/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-24-2027-11-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20271115
DTEND;VALUE=DATE:20271116
SUMMARY:California Form 100 extended due date
DESCRIPTION:Automatic extension to the 15th day of the 11th month\; payment
  was due Apr 15.\nSource: https://www.ftb.ca.gov/forms/2025/2025-100-bookl
 et.pdf\nAll dates: https://adlega.com/blog/startup-tax-calendar-2027/\nNot
  tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-25-2027-12-01@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20271201
DTEND;VALUE=DATE:20271202
SUMMARY:Delaware franchise tax installment 20% (if 2027 tax $5\,000+)
DESCRIPTION:Source: https://delcode.delaware.gov/title8/c005/index.html\nAl
 l dates: https://adlega.com/blog/startup-tax-calendar-2027/\nNot tax advic
 e.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
BEGIN:VEVENT
UID:adlega-taxcal-2027-26-2027-12-15@adlega.com
DTSTAMP:20261022T120000Z
DTSTART;VALUE=DATE:20271215
DTEND;VALUE=DATE:20271216
SUMMARY:Q4 2027 corporate estimated tax (federal and CA)
DESCRIPTION:Source: https://www.irs.gov/pub/irs-dft/p509--dft.pdf https://w
 ww.ftb.ca.gov/forms/2026/2026-100-es.pdf\nAll dates: https://adlega.com/bl
 og/startup-tax-calendar-2027/\nNot tax advice.
URL:https://adlega.com/blog/startup-tax-calendar-2027/
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR