Delaware tax forms & filing.

Things to know about filing in Delaware

• Delaware's state filing deadline is April 30, not April 15. You still need to pay any state tax owed by April 30 to avoid penalties — extension only extends the filing deadline, not the payment deadline.
• Delaware has no state sales tax, but it does levy a gross receipts tax on businesses. This rarely affects individual returns but matters for self-employed Delaware filers.
• Pension and retirement income receive a partial state exclusion in Delaware for residents over a defined age threshold — we apply this on the Form 200-01 worksheet at intake.

Delaware April 30 filing deadline — what it means in practice

Delaware's individual income tax filing deadline is April 30, not April 15. The state pushes the deadline back specifically to give residents time to complete their federal return first and then transfer the relevant figures.

Important caveat: payment is also due April 30. The deadline extension covers filing, not payment. If you owe Delaware tax and don't pay by April 30, interest and penalties accrue from that date — even if you file later under an extension.

For Delaware residents who file federally on April 15 and pay any federal balance due, scheduling Delaware payment for the same date avoids any risk of late-payment exposure. We default to this at intake unless cashflow timing requires the two-week gap.

Delaware no-sales-tax — and the gross receipts tax for businesses

Delaware has no state sales tax — a meaningful benefit for retail-heavy household budgets. The state funds operations primarily through corporate franchise tax (Delaware is the corporate-domicile capital of the U.S.) and a gross receipts tax on businesses operating in Delaware.

The Delaware gross receipts tax doesn't appear on individual returns but affects self-employed Delaware residents. Rates vary by business activity, and there's a meaningful no-tax-due threshold for very small businesses. New Delaware-resident sole proprietors are often surprised by the gross-receipts compliance obligation.

If you operate a service business out of Delaware (consulting, freelance, contracting), you typically need to register with the Delaware Division of Revenue and file quarterly gross-receipts returns. This is separate from the federal Schedule C and the state individual return.

Where's my refund?

The Delaware Division of Revenue runs the official refund-status tracker. You'll need your Social Security number, filing status, and exact refund amount (in some cases, the tax year and a return-amount input).

Check your Delaware refund status →

Multi-state considerations

If you lived or worked in more than one state during the tax year, you typically file a part-year resident return in each state. If you live in one state and work in another, you usually file as a resident where you live and as a nonresident in the work state — claiming a credit on the resident return for taxes paid to the work state. Reciprocity agreements between some neighboring states change this default; we map this out at intake.

Delaware-specific multi-state nuances are addressed in the quirks list above when they apply.

Get the current-year forms

State tax rates, brackets, and forms change every year. We point to the Delaware Division of Revenue as the authoritative source for current-year information. Form numbers above are stable; rates, deduction amounts, and credit limits are not — always verify before relying on a specific dollar amount.

Open the Delaware Division of Revenue website →