Sole Proprietorship in Delaware: How to Start One

A Delaware sole proprietorship is the simplest way to start doing business in the state. There's no formation document to file with the Division of Corporations, no separate legal entity, and no annual report requirement like you'd have with an LLC or corporation. You and the business are legally the same person, which means you keep all the profits but you're also personally on the hook for every debt and lawsuit the business generates.

If you're already doing freelance work, consulting, or selling goods under your own name in Delaware, you may technically already be operating as a sole proprietor. This guide walks through what you actually need to do to make it official: register a trade name if you're using one, get your state business license, and set up your tax accounts correctly from day one.

What You'll Need Before You Start

A business name decision. Operating under your own legal name (e.g., "Jane Smith") requires no name filing. Operating under any other name (e.g., "Smith Consulting") requires a trade name registration.
$25 for the trade name (DBA) filing, if you're using one.
$75 to $90 for your Delaware business license (most service businesses pay $75; general retailers pay $90, which includes a $15 retail crime fee).
A federal Employer Identification Number (EIN) from the IRS, if you plan to hire employees or simply prefer not to use your Social Security number on business paperwork. This is free and done directly through the IRS, not a Delaware agency.
Access to the Delaware One Stop portal, which handles both the business license application and, as of February 2, 2026, the statewide trade name registration.
A bank account you're willing to dedicate to business income and expenses, even though Delaware doesn't require a separate business bank account for sole proprietors.

Step-by-Step: How to Start a Sole Proprietorship in Delaware

Step 1: Decide whether you need a trade name (DBA)

If you plan to operate under your own full legal name with no additions, you can skip name registration entirely. But the moment you add anything to it, like "Jane Smith Photography" or "Wilmington Web Design," that's a fictitious or trade name in Delaware's eyes, and it has to be registered.

Before you settle on a name, search existing registrations to avoid stepping on another business's toes. Delaware doesn't publish a dedicated free trade-name search tool the way it does for corporate entity names, so a general web search plus a check of the Division of Corporations entity search is a reasonable starting point, even though sole proprietor trade names live in a different system.

Step 2: Register your trade name through Delaware One Stop

If you need a DBA, file it through the Delaware Division of Revenue's Trade, Business or Fictitious Name registration, accessed via the Delaware One Stop portal. As of February 2, 2026, this is a single statewide registry administered by the Division of Revenue. Before that date, sole proprietors had to file separately with the Prothonotary in every county where they operated, which meant a business working in both New Castle and Kent counties filed twice. That's gone now: one filing covers the whole state.

The fee is $25, one time. Delaware trade name registrations don't expire and don't need to be renewed, which is unusual compared to states that require periodic renewal.

Step 3: Apply for your Delaware business license

This is the step sole proprietors most often skip, and it's the one that actually matters most. Delaware requires any person or entity conducting a trade or business in the state to hold a state business license, issued by the Division of Revenue through Delaware One Stop. This applies whether you're a one-person consulting operation or a retail shop with employees.

The statutory fees are:

$75 per year for most categories: general services, professional and occupational businesses, contractors, manufacturers, and wholesalers.
$90 per year for general retailers (this includes a $15 retail crime fee baked into the total).
$25 to $40 for each additional business location beyond your first.

Licenses run for one calendar year and expire on December 31, regardless of when during the year you applied. If you'd rather not deal with renewal every twelve months, Delaware offers an optional three-year license at three times the annual fee.

Step 4: Understand Delaware's gross receipts tax (there's no sales tax)

Delaware is one of the few states with no state sales tax, which is a genuine selling point for retail-facing sole proprietors. In its place, the state collects a gross receipts tax directly from the business, based on total revenue rather than itemized sales.

Rates vary by business activity, roughly 0.0945% to 1.9914%, and most sole proprietors file monthly or quarterly depending on how the Division of Revenue classifies their license. There's a monthly exclusion, commonly $100,000, meaning you don't owe gross receipts tax on revenue below that threshold in a given filing period. Because the exact rate depends on your specific business activity code, confirm your rate directly on the Division of Revenue site when you apply for your license rather than guessing.

Step 5: Get an EIN if you need one

A sole proprietorship with no employees can legally operate using the owner's Social Security number for tax purposes. But most sole proprietors get a free EIN from the IRS anyway, because banks generally want one to open a business account, and it keeps your SSN off invoices and client-facing paperwork. If you plan to hire anyone, an EIN isn't optional, it's required.

Step 6: Handle personal income tax on business profits

A sole proprietorship isn't taxed separately from you. Business profit flows straight to your personal Delaware income tax return. Delaware's personal income tax is graduated, running from 2.2% to 5.55% on taxable income under $60,000, and 6.60% on taxable income at or above $60,000. Set aside money for this throughout the year, since nobody is withholding it for you the way an employer would.

Step 7: Check for local licenses and permits

The state business license covers your obligation to Delaware itself, but cities and towns can layer on their own requirements. Wilmington, Dover, Newark, and other municipalities may require separate local business licenses or permits depending on your industry and location. Check with the specific city or town where you'll operate before you open your doors.

Tips for a Smooth Setup

Apply for the business license before you take your first dollar. The license requirement applies to anyone conducting business in Delaware, not just businesses above a certain revenue threshold.
Keep your trade name and business license paperwork together. You'll need both when opening a business bank account or applying for local permits.
Track your December 31 license expiration. Unlike an LLC's flat annual tax with a fixed June deadline, the business license clock resets every calendar year regardless of your start date, so a license bought in October still expires that same December 31 unless you bought the three-year option.
Separate your business and personal finances early even though it isn't legally required. It simplifies tax time and makes your gross receipts tax filings far less painful to reconstruct.

Common Mistakes to Avoid

Assuming a trade name registration counts as a business license. They're two separate filings with two separate fees, and Delaware requires both if you're using a fictitious name.
Confusing gross receipts tax with sales tax. Because Delaware has no sales tax, some new sole proprietors assume they owe nothing on revenue. The gross receipts tax fills that gap, and it's owed by the business, not collected from customers the way sales tax is.
Forgetting that a sole proprietorship offers no liability shield. If the business is sued or can't pay a debt, your personal assets, including your home and personal savings, are exposed. If that risk doesn't sit well with you, an LLC is worth comparing before you commit to this structure.
Filing a trade name with the wrong agency out of habit. If you or someone helping you set up the business is going off older guidance, they may point you to the county Prothonotary. That changed on February 2, 2026, when trade name filing consolidated into a single statewide registry with the Division of Revenue.

What You Can Reasonably Expect

Most sole proprietors can generally expect to complete the trade name registration and business license application within the same sitting through Delaware One Stop, since both run through the same portal. Processing and confirmation timelines for the business license aren't published as a fixed number of days by the Division of Revenue, so budget a little buffer before you need the license in hand, and don't schedule a launch date that depends on same-day approval.

Total out-of-pocket cost to get legally set up, assuming you need a trade name and fall into the $75 license tier, typically lands around $100 for the first year. Retailers should expect closer to $115 given the higher license fee.

This article is for general informational purposes only and does not constitute legal or tax advice. Delaware's fees, thresholds, and gross receipts tax rates can change, and your specific situation, especially around liability exposure and tax classification, may call for professional guidance. Consult a Delaware-licensed attorney or CPA before making formation decisions, and confirm current fees directly with the Delaware Division of Revenue before you file.

Frequently Asked Questions

Do I need to file anything with the Delaware Division of Corporations to start a sole proprietorship?

No. Sole proprietorships aren't registered entities, so there's no Certificate of Formation or Certificate of Incorporation to file. Your only state-level filings are the trade name registration (if applicable) and the business license.

Does a Delaware sole proprietor need a registered agent?

No. The registered agent requirement applies to formal entities like LLCs and corporations that file formation documents with the Division of Corporations. A sole proprietorship has no such filing, so it has no registered agent requirement.

Can I convert my sole proprietorship into an LLC later?

Yes, and many Delaware sole proprietors do exactly that once revenue or liability risk grows. Converting means filing a Certificate of Formation for a new LLC and transferring the business over, generally not a same-day process, so it's worth planning for if you anticipate outgrowing the sole proprietor structure.