Delaware Contractor Tax Obligations

Delaware's tax structure for contractors looks deceptively simple — no sales tax, a modest Gross Receipts Tax, straightforward payroll obligations. But the details trip up contractors who assume it works like neighboring states. The GRT alone has filing traps that can stall your license renewal even when you owe nothing.

Gross Receipts Tax

Delaware doesn't have a retail sales tax. Instead, it taxes your total gross revenue through the Gross Receipts Tax. For general construction contractors, the rate is 0.6472% of gross receipts on all work performed within Delaware.

The critical detail: you get a $100,000 monthly exclusion (or $300,000 quarterly if you file quarterly). If your Delaware revenue in a given month falls below $100,000, your GRT liability is $0. But — and this is where contractors get burned — you still have to file the return. Missing a zero-liability filing triggers penalties and can delay your state business license renewal.

To illustrate the math: a contractor pulling $180,000 in monthly Delaware revenue pays GRT only on $80,000 (after the $100,000 exclusion), which comes to about $518.

Subcontractor Deduction (Form 1280)

General contractors can deduct payments made to licensed subcontractors from their GRT calculation. This prevents double taxation — the subcontractor pays GRT on their receipts, so you shouldn't be taxed on the same money.

The deduction requires Form 1280, which lists each subcontractor's name, address, tax ID, Delaware business license number, and the exact payment amount. You attach Form 1280-DEV to your monthly or quarterly return to apply the deduction.

Four rules that catch GCs off guard:

1. The subcontractor must hold an active Delaware business license — payments to unlicensed subs aren't deductible.
2. Material-only purchases are never deductible, even from licensed vendors. The subcontractor must provide labor, or labor plus materials.
3. Equipment rentals, hauling, trash removal, and professional service fees (architects, engineers, attorneys) aren't deductible.
4. If a subcontractor is unregistered, the general contractor must contact the Division of Revenue and apply mandatory 20% withholding to payments made to that subcontractor.

Keep copies of every subcontractor's Delaware business license on file. Auditors verify these, and a deduction claimed against an unregistered sub creates personal tax liability for the GC.

State Unemployment Insurance (SUI)

For 2026, Delaware's SUI taxable wage base is $14,500 per employee — up from $12,500 in 2025 and $10,500 in 2024. The wage base has climbed substantially over three years, and contractors who budget payroll costs based on older figures will find their unemployment tax bills higher than expected.

SUI rates range from 0.6% to 6.5% for experienced employers. New employers start at 1.8%. On top of the base SUI rate, every Delaware employer pays a flat 0.2% Operations and Technology Assessment on all wages — this funds the Department of Labor's technology systems.

You establish your SUI account by filing Form UC-1 through the Department of Labor. This is required as part of contractor registration, so it happens early in the process — but the ongoing quarterly wage reporting and tax payments continue as long as you have employees.

Delaware Paid Leave (LaborFirst)

The Delaware Paid Family and Medical Leave program became fully active for employee claims on January 1, 2026. The premium rate is 0.8% of employee wages, and employers can withhold up to 50% of that from employees.

Coverage thresholds by business size:

• 9 or fewer employees: exempt from the program entirely
• 10–24 employees: exempt from medical and family leave but must offer parental leave (0.32% premium)
• 25+ employees: full program coverage required (0.8% premium)

Register through the LaborFirst portal at de.gov/paidleave. Quarterly wage reporting is required, and if you choose to pay the employee's share of the premium, that amount becomes taxable income on their payroll records.

Income Tax Withholding

Delaware income tax withholding applies to all employee wages. Rates are graduated, with a top rate of 6.6%. If employees also work within Wilmington city limits, withhold the city's 1.25% earned income tax in addition to state withholding — the city tax applies based on where the work is performed, regardless of where the employee lives.

Keeping It Straight

The Delaware General Contractor License Guide includes a tax compliance tracker that maps every filing obligation, deadline, and form across state and local jurisdictions — including the GRT exclusion calculations and Form 1280 procedures that trip up contractors during their first year.

See more Delaware guides →