Delaware Corporate Income Tax: Apportionment, Filing, Penalties

The Delaware corporate income tax is a flat 8.7 percent on the net income a C corporation earns from business activities and property in the state.¹ It applies whether the company is incorporated in Delaware or somewhere else, as long as it has Delaware-source income. Delaware has no sales tax, but the income tax sits alongside two other obligations most corporations owe: an annual franchise tax and a gross receipts tax on in-state sales. Each has its own rules, deadlines, and penalties.

Who Owes the 8.7 Percent

Every C corporation doing business in Delaware or earning income from Delaware sources pays the 8.7 percent tax.¹ The tax is calculated on the corporation’s federal taxable income, adjusted for Delaware-specific modifications, and then apportioned to the state.

S corporations are exempt at the entity level. Delaware recognizes the federal S election, so income passes through to shareholders and is reported on their individual Delaware returns.² LLCs and partnerships are also pass-through entities for Delaware purposes.

The exemption that matters most to the hundreds of thousands of companies incorporated in Delaware purely for legal reasons is Section 1902(b)’s statutory-office-only carve-out. A corporation that maintains only a registered office in Delaware and does not actually conduct business there owes no income tax.¹ Investment holding companies whose Delaware activities are limited to managing intangible investments are similarly exempt, as are nonprofits, insurance companies that pay the state’s gross premiums tax, REITs, and REMICs. Being exempt from income tax does not eliminate the franchise tax obligation, which every Delaware corporation owes regardless of activity.

Nexus and How Income Gets Apportioned

Delaware can tax a corporation’s income only if the company has enough connection to the state to establish nexus. That connection can come from maintaining an office, owning or leasing property, employing workers, or generating significant revenue from Delaware customers. The Division of Revenue uses a nexus questionnaire to make that determination.³

Once nexus exists, a multistate corporation does not pay Delaware tax on all of its income. Delaware uses a single sales factor apportionment formula: the share of income taxable in Delaware equals the ratio of the corporation’s Delaware gross receipts to its total U.S. gross receipts.² This single-factor method replaced the older three-factor formula (property, payroll, and sales) starting with tax year 2020.

Sourcing rules determine where a sale counts. Tangible goods are sourced to Delaware when the product is physically delivered to a buyer in the state.⁴ Services and intangible income are sourced based on where the benefit is received; asset management services, for instance, are sourced to the domicile of the person or entity being served. Under this market-based sourcing approach, an out-of-state company selling to Delaware customers can owe Delaware income tax without any physical presence in the state.

Computing Taxable Income

Delaware begins with a corporation’s federal taxable income and then applies its own adjustments to reach “entire net income,” which is then apportioned using the sales factor.⁴

Common additions include interest income from other states’ municipal bonds and any federal deduction taken for state income taxes paid. Common subtractions include U.S. government bond interest, foreign-source dividends on which foreign tax was paid, and gains from sales of federal or Delaware government securities. Those modifications can push Delaware taxable income meaningfully above or below the federal figure.

Bonus Depreciation

Delaware has decoupled from the 100 percent bonus depreciation rules in the federal One Big Beautiful Bill Act for property acquired and placed in service between January 19, 2025, and January 1, 2031.⁵ For corporate taxpayers, Delaware instead follows the Tax Cuts and Jobs Act phase-down: 40 percent bonus depreciation for tax year 2025, 20 percent for 2026, and zero for 2027 and later. Delaware also decoupled from the OBBBA’s special depreciation allowance for qualified production property. A corporation that took full federal bonus depreciation must adjust on its Delaware return.

Net Operating Losses

For tax years after December 31, 2020, Delaware NOLs may be carried forward indefinitely, but the carryforward deduction cannot exceed the amount claimed on the federal return for that year.⁴ The two-year carryback has been eliminated for most businesses. Farming operations and property-and-casualty insurance companies keep a two-year carryback, but it is capped at $30,000 per carryback year. Any losses carried back federally but blocked by Delaware’s $30,000 limit can be carried forward instead.

Filing and Estimated Payments

Corporations file on Form CIT-TAX with the Division of Revenue.² Calendar-year filers are due April 15. Fiscal-year filers are due the fifteenth day of the fourth month after their year closes. A federal extension automatically extends the Delaware filing deadline, but not the payment deadline. Any tax owed is still due by the original date.

Estimated tax payments are required in four installments, due April 15, June 15, September 15, and December 15. Underpayment triggers a separate penalty under Section 1904 of Title 30.

Penalties for Getting It Wrong

Interest on any unpaid tax runs at 0.5 percent per month, compounded monthly, from the original due date until the balance is paid.⁶ The due date is calculated without regard to any filing extension, so interest starts on April 15 for calendar-year filers even if the return itself is on extension.

Willfully attempting to evade or defeat any Delaware tax is a Class E felony carrying up to five years of imprisonment.⁷⁸ Filing a fraudulent return or making false statements under penalty of perjury is also a Class E felony under Section 574. Courts may add fines at their discretion. These provisions apply to any person involved in the evasion, which can include individual corporate officers.

The most severe administrative penalty is charter forfeiture. Delaware can forfeit a corporation’s charter for failure to pay franchise taxes or file annual reports, and a forfeited corporation loses its legal authority to do business. Restoring the charter requires a certificate of renewal and revival and payment of all back taxes, penalties, and fees. Holding companies that treat Delaware as a paperwork state and forget about the annual obligations are the ones most often caught by this.

Franchise Tax and Annual Reports

The franchise tax is a separate obligation administered by the Division of Corporations, and every corporation incorporated in Delaware owes it whether or not the company earned any income. Domestic corporations must file the annual report and pay franchise tax online by March 1 each year.⁹ Foreign corporations registered to do business in Delaware file by June 30.¹⁰

Two calculation methods exist, and a corporation may use whichever produces the lower bill:

Authorized Shares Method: Corporations with 5,000 or fewer authorized shares pay a minimum of $175. From 5,001 to 10,000 shares, the tax is $262.50. Each additional 10,000 shares (or fraction) above 10,000 adds $87.50. The maximum under this method is $200,000.
Assumed Par Value Capital Method: This formula uses total gross assets and authorized shares. Companies with millions of authorized shares but modest assets almost always benefit from this calculation.

The annual report filing fee is $50 for domestic corporations ($25 for exempt corporations) and $125 for foreign corporations.¹⁰ Missing the March 1 deadline triggers a $200 penalty plus 1.5 percent monthly interest on the unpaid tax and penalty.⁹

LLCs and limited partnerships formed in Delaware pay a flat $300 franchise tax by June 1 and do not file an annual report with the Division of Corporations.

Gross Receipts Tax

Delaware imposes no sales tax, but it does tax businesses on the receipts they generate from selling goods or providing services in the state.¹¹ The seller pays, and the tax is calculated on total receipts, not profit.

Rates run from 0.0945 percent to 1.9914 percent depending on the activity, with petroleum products taxed at a variable rate reaching 2.4218 percent.¹² Most businesses receive a monthly or quarterly exclusion that reduces taxable receipts, typically between $100,000 and $1,250,000 per month depending on the activity.

New businesses file quarterly by default. The Division of Revenue applies a look-back period to determine whether an established business must switch to monthly filing. Quarterly returns are due by the last day of the first month after the quarter closes; monthly returns are due by the twentieth of the following month. Businesses coming from conventional sales-tax states often miss this tax entirely, and the penalties for noncompliance track those for any other Delaware tax.

1
Justia. Delaware Code 30-1902 – Imposition of Tax on Corporations; Exemptions
2
Division of Revenue – State of Delaware. Corporate Income Tax FAQs
3
State of Delaware Division of Revenue. NEXUS Questionnaire
4
Justia. Delaware Code 30-1903 – Computation of Taxable Income
5
Delaware Division of Revenue. Technical Information Memorandum – Delaware HB 255
6
Justia. Delaware Code 30-533 – Interest on Underpayment
7
Justia. Delaware Code 30-571 – Attempt to Evade or Defeat Tax; Class E Felony
8
Delaware Code Online. Delaware Code Title 11 Chapter 42 – Sentences for Felonies and Misdemeanors
9
Delaware Division of Corporations. Annual Report and Tax Instructions
10
Delaware Division of Corporations. Annual Report and Tax Information
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Division of Revenue – State of Delaware. Step 4 – Learn About Gross Receipts Taxes
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Division of Revenue – State of Delaware. Gross Receipts Tax FAQs