Wilmington, DE Business License Guide

What does this mean for me?

It means there is not just one form. A Wilmington business may have a city license, Delaware state license, zoning review, tax accounts, and special permits. A home office, online shop, restaurant, contractor, food truck, salon, landlord, or professional service can each have a different path.

Start with two facts: where you will operate and what you will do. A home seller may still need city and state licenses and should ask about home occupation rules. A storefront may also need zoning approval, building permits, fire review, signs, and inspections. For a basic overview, see our guide on whether you need a business license.

City of Wilmington Business License

The local license is called the City of Wilmington Business License. Wilmington’s official business page points owners to the City Business License Application and lists the Wage/Business License Division as the city contact. The city form is issued by the Department of Finance.

The city business license application asks for the legal name, trade name, ownership type, actual physical business location, mailing address, federal ID or Social Security number, Delaware state license number, date business started in Wilmington, number of employees, and license type. The form says a P.O. Box is not acceptable for the physical business location field.

The application says all city license applicants must attach a current State of Delaware Business License, except applicants for the city’s Three or More Dwelling-Unit License. This is why many Wilmington owners should finish the Delaware state step first.

City license items that may change your path

• Restaurants and edible retailers may need to supply a Board of Health certificate copy with the city license application.
• Air conditioning, boiler installation, heating, plumbing, and mechanical refrigeration contractor categories are tested license categories on the city form.
• Some businesses also need fire, building, sign, rental, parking, mobile food, or event approvals.
• If you have employees or Wilmington net profits, check city tax account and filing rules.

City wage, net profits, and head tax items

Wilmington’s wage and net profits tax page lists earned income taxpayer account forms, annual reconciliation and W-2 filing requirements, wage tax refund forms, and net profits tax returns. The city also says its code calls for a head tax of $15 per month for every employee over five who is located in Wilmington and working for the licensee. Confirm current forms and tax duties with the city before filing.

Delaware state requirements for Wilmington businesses

Most Wilmington businesses also need the Delaware state layer. Delaware’s Division of Revenue says any person or entity conducting a trade or business in Delaware must obtain a State of Delaware Business License. The state’s business requirements page says the annual fee varies, but is generally $75 for a first location, and a separate license is required for each separate business activity.

Use Delaware One Stop registration to register and license a business operating in Delaware. One Stop can also guide employer registrations when you have Delaware employees. The state’s renewal page says Division of Revenue licenses are issued by calendar year and can be renewed for one year or three years. One Stop does not handle municipal, county, professional, or other license types.

Trade names, entities, and professional licenses

If you use a DBA or trade name, check Delaware’s trade name page. Delaware One Stop says trade names are now managed by the Division of Revenue effective February 2, 2026, and a valid Delaware business license is required to register a trade name for a business that operates in Delaware.

Forming an LLC or corporation through the Delaware Division of Corporations is separate from getting a city license. Some occupations also need Delaware professional licensing. The Division of Professional Regulation says certain people and businesses must get a valid professional license before practicing or operating in Delaware. Use the professional license application page and DELPROS when your field is regulated.

New Castle County requirements

Wilmington is in New Castle County, but I did not verify an official county page that creates a blanket county business license for every business inside Wilmington city limits. County rules may still matter if you work outside the city, bid on county work, need county land use help, or do construction in county jurisdiction.

New Castle County has contractor licensing. Its permit endorsed contractor page says permit endorsed licenses must be obtained for building construction activity requiring a permit and/or utility work. If your job is outside Wilmington city limits, check the county before work starts.

Federal steps to check

Many small businesses need an Employer Identification Number. The IRS says you can get an EIN directly from the IRS online for free if approved. An EIN is common for employers, corporations, partnerships, many LLCs, banking, and payroll.

The SBA says businesses regulated by a federal agency may need a federal license or permit. Check the SBA’s federal licenses and permits list if your work involves alcohol, aviation, firearms, fish and wildlife, transportation, broadcasting, mining, or another federally regulated field.

FinCEN’s BOI page says, as of its March 2025 alert, entities created in the United States and their beneficial owners are exempt from BOI reporting under the Corporate Transparency Act. Foreign entities registered to do business in the United States should check FinCEN’s current rules.

Zoning, building, fire, food, signs, and other local permits

A city business license does not prove your location is allowed for your use. Wilmington’s Land Use Division says Business Compliance reviews business license use approvals and enforces business license and land use provisions. Check zoning before you sign a lease, buy equipment, or set an opening date.

The city has a zoning page with zoning maps, zoning standards, and Chapter 48 of the City Code. If you work from home, our home occupation permit guide can help you prepare questions, but Wilmington’s official answer controls.

The city’s construction and development page says permits are required for new structures, changes to existing structures, demolition, and repairs such as electrical, plumbing, and mechanical work. If you are changing a space, adding a sign, opening a restaurant, adding fire protection systems, or changing occupancy, ask before work starts.

Fire permits and plan review

The City Fire Marshal’s Office has fire permit applications for tanks, blasting, compressed natural gas, daycare inspection, fire protection plan review, flammable or combustible liquids, LPG gas, single events, tents, and welding or cutting.

Food, restaurants, and mobile food trucks

Food businesses should check with the Delaware Office of Food Protection early. Delaware’s food establishment page covers restaurants, food trucks, bakeries, caterers, frozen dessert stands, butchers, food delivery businesses, and other operations that store, prepare, package, serve, vend, or provide food.

Wilmington’s Mobile Food Truck Program says a food truck must obtain a Mobile Food Service Establishment License before reserving a city spot, and the page says there is no cost for that license. The city also says most trucks will need documents such as business licenses, health inspections, and fire marshal inspection. City food truck spots are reserved through Best Food Trucks, and the city page lists a daily use fee of $22 plus a small transaction fee.

For broader help, see our food truck license guide and online business license guide. Your Wilmington and Delaware agencies must still confirm the exact permits.

Costs you can plan for

Use this table as a planning map, not a final bill. Fees can depend on business type, location, license category, plans, inspections, or activity codes.

Real-world examples

Home-based web designer

A web designer working from a Wilmington home should check the Delaware state license, city business license, and home use rules. Ask whether client visits, signs, employees, or deliveries change the answer.

Cleaning company with workers and vans

A cleaning company may need state and city licenses, city tax accounts if it has employees or Wilmington net profits, and possibly a Commercial Services Parking Permit if it needs service-vehicle parking while working in the city.

Restaurant or small bakery

A restaurant or bakery should check zoning, building permits, fire review, signs, health approvals, state business licensing, and the city business license before opening. The city form says restaurants and edible retailers may need a Board of Health certificate copy.

Contractor working in and outside Wilmington

A contractor may need the Delaware state license, Delaware contractor registration or certification, a Wilmington city business license, and city building permits for Wilmington jobs. County licensing may apply outside city limits.

A compact compliance checklist

• Confirm the address is inside Wilmington city limits.
• Write down your exact business activities.
• Ask Land Use and Planning whether the use is allowed.
• Get or update your State of Delaware Business License.
• Register a Delaware trade name if your DBA needs one.
• Apply for the City of Wilmington Business License with the correct category.
• Check city wage, net profits, and head tax forms if they may apply.
• Check health, fire, building, sign, mobile food, professional, contractor, or rental rules.
• Check New Castle County if your work or agency instructions point to the county.
• Keep copies of licenses, permits, emails, inspections, and renewal notices.

What to do if this does not work

If a portal is down, a form link fails, or you cannot tell which category fits, do not guess. Use the city’s forms library, call Wilmington 311, or contact the office listed on the official page. If you cannot verify a fee, ask the office to confirm the current amount and license category before you submit payment.

If zoning blocks your plan, ask Land Use and Planning what decision was made and what options exist. If a license or inspection action is refused, suspended, revoked, or cancelled, the city’s Board of License and Inspection Review may be relevant. Check the official procedure and deadline before acting.

About BusinessLicenseGuide.com

BusinessLicenseGuide.com is a plain-English licensing guide for ordinary small-business owners. We are not a government agency, law firm, CPA firm, or filing service. Our job is to help you understand which offices to check and what questions to ask.