Check our 2025 Tax Deadlines For C-Corp Startups or Click for your customized tax compliance calendar by startup hub
Delaware C-Corporations operating in Washington DC have several important tax filing and payment deadlines beyond the traditional April 15th filing date. DC franchise taxes are due on April 15th, and can be extended to October 15th. See other important dates in the calendar below.
Delaware Quarterly Estimated Franchise Tax. Pay 20% of your estimated annual amount (if annual amount expected to exceed $5,000).
Q3 DC Estimated Tax Form D-20ES due.
Payment for the second half of the Real Property Tax Bill is due.
Federal Quarterly Estimated Tax 3rd installment (third quarter 2024).
Washington DC Corporate Franchise Tax Return Form D-20 final due date if extended.
C Corp Form 1120 Tax Return final due date for Washington DC startups if extension was filed.
Delaware Quarterly Estimated Franchise Tax, Pay 20% of estimated annual amount (if annual amount expected to exceed $5,000).
Click The Links To Learn More About These Filings And 2025 Washington DC Startup Tax Deadlines
Claim Research & Development Tax Credits on Form 941, and file annual Federal Unemployment Tax Act (FUTA) return on Form 940. Use our handy calculator to estimate your possible research and development tax credit.
Delaware Annual Franchise Report filing deadline. Your Washington DC startup will pay a minimum of $400, which increases if you have significant funding.
IRS 30-day automatic extension: provide Form 1095-B and Form 1095C to employees.
Payment for the first half of the Real Property Tax Bill is due on this deadline.
Q1 DC Estimated Tax Form D-20ES due.
Washington DC Corporate Franchise Tax Return Form D-20 original due date. Can be extended to October 15.
C Corp Form 1120 Tax Return due. The Federal Form 1120 is the U.S. Corporation Income Tax Return, which the IRS has companies use to report their income, losses, credits, etc., and to figure the income tax liability of the corporation. Can extend the deadline to Oct. 15. All Washington DC startups are required to file this Federal form by this deadline unless they file an extension.
Federal Quarterly Estimated Tax 1st installment (first quarter 2024).
File the R&D Tax Credit Form 6765 with your tax return. Can extend to October 15. We strongly recommend working with a qualified CPA to prepare this form in conjunction with your Form 1120 if you are a high-growth startup – if your company is going to be acquired by a major technology company, that company’s CFO will use a strong tax team to do due diligence on this.
Due date for Washington DC startup employees to make contributions to Individual Retirement Accounts (IRAs) for 2023 (Employee Benefits).
Washington DC startups can claim Research & Development Tax Credits on Form 941.
Delaware Quarterly Estimated Franchise Tax. Pay 40% of estimated annual amount (if annual amount expected to exceed $5,000).
Federal Quarterly Estimated Tax 2nd installment (second quarter 2024).
Claim Research & Development Tax Credits on Form 941 .
Delaware Quarterly Estimated Franchise Tax. Pay 20% of your estimated annual amount (if annual amount expected to exceed $5,000).
Q3 DC Estimated Tax Form D-20ES due.
Payment for the second half of the Real Property Tax Bill is due.
Federal Quarterly Estimated Tax 3rd installment (third quarter 2024).
Washington DC Corporate Franchise Tax Return Form D-20 final due date if extended.
C Corp Form 1120 Tax Return final due date for Washington DC startups if extension was filed.
Claim your Research & Development Tax Credits on Form 941.
Delaware Quarterly Estimated Franchise Tax, Pay 20% of estimated annual amount (if annual amount expected to exceed $5,000).
Q4 DC Estimated Tax Form D-20ES due.
Federal Quarterly Estimated Tax 4th installment (fourth quarter 2024).
Note: The federal tax deadline in 2025 is April 15. The federal extension deadline for 2025 is October 15. when the tax deadline is on weekend or holiday, the deadline is moved to the next business day.
How Much Does a Startup Tax Return Cost? Try Kruze Consulting’s Tax Preparation Pricing Tool.
If your Delaware C-Corp Washington DC funded startup needs tax help contact us today!
WASHINGTON DC, STARTUPS AND TAXES
Washington DC offers a strong startup ecosystem that’s both supportive and diverse, with a highly educated population. According to Technical.ly, in 2023 DC-area companies raised $939 million in the first quarter, followed by $1.013 billion in Q2. Startup Genome’s 2024 report ranked Washington DC 12th globally among startup ecosystems. Founders can take advantage of lower costs and available talent, and venture capital dollars are increasingly available, making the city a popular choice for entrepreneurs who are setting up shop.
The most important taxing authority for companies in Washington DC is:
Delaware C-Corporations operating in Washington DC have several important tax filing and payment deadlines beyond the traditional April 15th filing date. DC franchise taxes are due on April 15th, and can be extended to October 15th. See the other important deadlines above.
2024 startup tax deadlines are supplied for reference purposes only, and should not be used when making decisions in 2025 or beyond. Always consult your tax professional, and see our disclaimer below.
Click The Links To Learn More About These Filings And 2024 Washington DC Startup Tax Deadlines
Federal Quarterly Estimated Tax 4th installment (fourth quarter 2023).
Washington DC startups should send 1099s to contractors. Send W2s to employees and e-file 1099-MISC for non-employee compensation with the IRS. Or file Form 8809 for a 30-day extension to file W2s and 1099-MISC for non-employee compensation.
Claim Research & Development Tax Credits on Form 941, and file annual Federal Unemployment Tax Act (FUTA) return on Form 940. Use our handy calculator to estimate your possible research and development tax credit.
IRS 30-day automatic extension: provide Form 1095-B and Form 1095C to employees.
Delaware Annual Franchise Report filing deadline. Your Washington DC startup will pay a minimum of $400, which increases if you have significant funding.
Payment for the first half of the Real Property Tax Bill is due on this deadline.
Q1 DC Estimated Tax Form D-20ES due.
Washington DC Corporate Franchise Tax Return Form D-20 original due date. Can be extended to October 15.
Due date for Washington DC startup employees to make contributions to Individual Retirement Accounts (IRAs) for 2023 (Employee Benefits).
File the R&D Tax Credit Form 6765 with your tax return. Can extend to October 15. We strongly recommend working with a qualified CPA to prepare this form in conjunction with your Form 1120 if you are a high-growth startup – if your company is going to be acquired by a major technology company, that company’s CFO will use a strong tax team to do due diligence on this.
Federal Quarterly Estimated Tax 1st installment (first quarter 2024).
C Corp Form 1120 Tax Return due. The Federal Form 1120 is the U.S. Corporation Income Tax Return, which the IRS has companies use to report their income, losses, credits, etc., and to figure the income tax liability of the corporation. Can extend the deadline to Oct. 15. All Washington DC startups are required to file this Federal form by this deadline unless they file an extension.
Washington DC startups can claim Research & Development Tax Credits on Form 941.
Delaware Quarterly Estimated Franchise Tax. Pay 40% of estimated annual amount (if annual amount expected to exceed $5,000).
Federal Quarterly Estimated Tax 2nd installment (second quarter 2024).
Claim Research & Development Tax Credits on Form 941 .
Delaware Quarterly Estimated Franchise Tax. Pay 20% of your estimated annual amount (if annual amount expected to exceed $5,000).
Q3 DC Estimated Tax Form D-20ES due.
Payment for the second half of the Real Property Tax Bill is due.
Federal Quarterly Estimated Tax 3rd installment (third quarter 2024).
Washington DC Corporate Franchise Tax Return Form D-20 final due date if extended.
C Corp Form 1120 Tax Return final due date for Washington DC startups if extension was filed.
Claim your Research & Development Tax Credits on Form 941.
Delaware Quarterly Estimated Franchise Tax, Pay 20% of estimated annual amount (if annual amount expected to exceed $5,000).
Q4 DC Estimated Tax Form D-20ES due.
View tax compliance dates for Austin, Boston, New York City, Palo Alto, San Francisco, Santa Monica, Seattle, Washington DC, Atlanta, Salt Lake City, Mountain View, Chicago, Dallas, Miami, and San Jose
How Much Does a Startup Tax Return Cost? Try Kruze Consulting's Tax Preparation Pricing Tool.
How much can your startup save in payroll taxes? Estimate your R&D tax credit using our free calculator.
Every startup is different and so are its tax compliance needs. This is only a guideline. Please consult your tax professional. IRS Circular 230 Disclaimer: To ensure compliance with IRS Circular 230, any U.S. federal tax advice provided in this communication is not intended or written to be used, and it cannot be used by the recipient or any other taxpayer for the purpose of avoiding tax penalties that may be imposed on the recipient or any other taxpayer. Copyright © Kruze Consulting
Check our 2025 Tax Deadlines For C-Corp Startups or Click for your customized tax compliance calendar by startup hub
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