BusinessState

Plumbing business requirements — Delaware

What it takes to legally operate in Delaware. Add your city for local permits.

Add your city for local permits

2 items below — add your city to check local permits, and we're still verifying. We show what we've confirmed and flag what we haven't rather than guess.

Formation & federal100% verified

Form an LLC (or operate as a sole proprietor)Depends on your situation

Delaware LLC Articles of Organization filing fee is about $110; formation takes 1–3 weeks (expedite options).

$110Verified against the official source · Sep 2026Official source ↗

Employer Identification Number (EIN)Required

Get a free EIN from the IRS

FreeVerified against the official sourceOfficial source ↗

Ongoing entity reportRequired

Delaware LLCs file a annual report (about $400). flat annual LLC tax (raised from $300 to $400 on Aug 1, 2026), no report content, due June 1

$400 · annualVerified against the official source · Sep 2026Official source ↗

Delaware taxes100% verified

Sales / use tax registrationNot yet verified

Delaware has no general state sales tax; most solo service operators skip sales-tax registration (confirm for your service).

Verified against the official source · Sep 2026Official source ↗

State income taxRequired

Delaware has a personal income tax; pass-through LLC income is reported on the owner's Delaware return.

Verified against the official source · Sep 2026Official source ↗

Licenses100% verified

Plumbing occupational licenseRequired

Nearly every state licenses plumbers at the journeyman/master level and requires hours of documented experience plus an exam. You usually can't legally advertise plumbing work without it.

Verified against the official source · Sep 2026

Local permits0% verified

Local permitsNot yet verified

Local permits (zoning, home occupation, signage, health) are set by your city/county — tell us your city for specifics.

Not yet verified — check the official source

Insurance0% verified

General liability insuranceRecommended

General liability insurance and a surety bond are expected for plumbing work.

Not yet verified — check the official source

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