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Biz Formation Report

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

LLC formation report · Delaware

3 Best LLC Services in Delaware (2026)

By the Biz Formation Report editorial team

Biz Formation Report ranks LLC services in Delaware for 2026 as Mainstay Filing ($199), Delaware Registered Agent.ai ($199) and DE Registered Agent.org ($199), in that order. Mainstay Filing earns the top grade: the formation filing, the registered agent and the annual tax come to $199 a year, renewing at $199.

No.1

Our top pick in Delaware

1. Mainstay Filing: best for formation, agent and annual tax on one invoice

Score9.6out of 10
$199 a year plus the state fee, $309 due at checkout

Top grade, Mainstay Filing: a flat $199 yearly fee takes in the Delaware formation, your registered agent and the annual tax.

The renewal covers the Annual LLC Tax, which Mainstay files for you. Delaware collects $400 every year, with a deadline of annual alternative-entity tax due on or before June 1, and a late filing adds $200; Mainstay passes the state's fee through at cost.

Over three years Mainstay costs $200 more than Delaware Registered Agent.ai; our grading treats the broader coverage as worth that.

What you get

  • The LLC formation, done for you
  • Registered agent service all year
  • The annual tax prepared and filed
  • The EIN application

Good

  • Includes the EIN application
  • A single $199 yearly price, including the annual tax
  • Delaware's state fee is passed through at cost
  • Renewal is $199 with no add-ons

Weak spots

  • Its agent renews at $100 a year more than Delaware Registered Agent.ai's
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing review
No.2

Best local option

2. Delaware Registered Agent.ai: best for a Delaware LLC that expects to stay put

Score9.1out of 10
$199 for formation, then $99 a year for the agent, plus the state fee

Second grade, Delaware Registered Agent.ai: $199 for formation on top of the state fee, then $99 a year for the agent.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

The Annual LLC Tax is outside its published prices, so you submit it to Delaware yourself every year.

What you get

  • LLC filing done for you
  • Year-one registered agent service

Good

  • Registered agent service included for year one
  • Then $99 per year for the agent
  • $199 service fee, state fee added

Weak spots

  • Does not handle the Annual LLC Tax
  • The EIN application costs $99 extra
Visit Delaware Registered Agent.aiPartner link. We may earn money if you buy.
Read the Delaware Registered Agent.ai review
No.3

Best local option

3. DE Registered Agent.org: best for local Delaware formation

Score8.8out of 10
$199 for formation, then $99 a year for the agent, plus the state fee

Third grade, DE Registered Agent.org: $199 for formation on top of the state fee, then $99 a year for the agent.

The plan seats the company at an in-state street address and posts scans of papers served there to your online account.

The Annual LLC Tax is outside its published prices, so you submit it to Delaware yourself every year.

Prices and features do not separate Delaware Registered Agent.ai from DE Registered Agent.org; either works.

What you get

  • LLC filing done for you
  • The first year as your registered agent

Good

  • First-year registered agent service is part of the price
  • Agent renewal of $99
  • $199 service fee, state fee added

Weak spots

  • Does not handle the Annual LLC Tax
  • The EIN application costs $99 extra
Visit DE Registered Agent.orgPartner link. We may earn money if you buy.
Read the DE Registered Agent.org review

Summary of the 3 grades

RankProviderGradeService feeYear twoBest fitSite
1Mainstay Filing9.6$199$199/yrFormation, agent and annual tax on one invoiceVisit Mainstay FilingPartner link. We may earn money if you buy.
2Delaware Registered Agent.ai9.1$199$99/yrA Delaware-only LLC keeping costs downVisit Delaware Registered Agent.aiPartner link. We may earn money if you buy.
3DE Registered Agent.org8.8$199$99/yrA Delaware-only LLC keeping costs downVisit DE Registered Agent.orgPartner link. We may earn money if you buy.

The grades are editorial: Biz Formation Report assigns every mark out of 10 using the criteria on How we rank, not customer ratings.

Delaware LLC service prices, 2026: year one, renewal and three-year outlay

ProviderYear 1Year 2Year 3Three-year outlayAnnual LLC Tax done for you
Mainstay Filing$199$199$199$597Yes
Delaware Registered Agent.ai$199$99$99$397No
DE Registered Agent.org$199$99$99$397No

All prices were taken from the companies' own websites on November 12, 2026. Delaware's $110 filing fee is payable on top of each row and is not part of these totals.

Why Mainstay Filing ranks first

Of the grade, 32% rests on three-year bill and 32% on what the money buys; renewal handling, local rules match and pricing openness share the remaining 36%. What the money buys decided Delaware.

Delaware requires a report every year, charging $400, plus $200 if it is late. Mainstay's price includes the filing and Delaware Registered Agent.ai's does not, which outweighed Delaware Registered Agent.ai's lower three-year cost in the coverage grade.

Every criterion and weight is listed on How we rank.

Delaware LLC filing fee and form, from official sources

The Delaware Secretary of State charges $110 for the Certificate of Formation of a Limited Liability Company. Each provider here adds that fee at cost on top of its own.

What a Delaware LLC owes after formation

Expect the Annual LLC Tax every year, with a deadline of annual alternative-entity tax due on or before June 1. It costs $400. Late filing adds $200. Every LLC must name a registered agent with an in-state street address.

Delaware LLC service: common questions

What does Delaware charge to start an LLC, all in?

$110 goes to the state and $199 to the service.

Which document starts the LLC?

the Delaware Secretary of State accepts the Certificate of Formation of a Limited Liability Company.

Is a registered agent mandatory for a Delaware LLC?

Yes. Delaware requires one, with a physical street address in the state, from the day the LLC exists.

What recurring paperwork follows an LLC in Delaware?

A single item: the Annual LLC Tax, filed every year (annual alternative-entity tax due on or before June 1) for $400.

Does the service price cover the EIN?

The Mainstay Filing yearly price covers it. Delaware Registered Agent.ai and DE Registered Agent.org list it at $99. The IRS does not charge for issuing an EIN.

What is the best LLC service in Delaware, by our report?

Mainstay Filing: $199 a year buys the Delaware formation, a year as your registered agent and the annual tax filing, then renews at $199.

Related pages

Source notes

  1. Delaware yearly filing: Recurring obligation, official source (verified October 2026)
  2. Delaware yearly filing: Recurring obligation, official source (verified October 2026)
  3. Delaware yearly filing: HB 400, official source (verified October 2026)
  4. Delaware report due date (verified August 2026)
  5. 6 Del. C. § 18-201 (verified August 2026)
  6. Delaware registered agent statute (verified October 2026)
  7. Pulled November 12, 2026: Mainstay Filing, Delaware service page
  8. Pulled November 12, 2026: Delaware Registered Agent.ai, pricing and service pages
  9. Pulled November 12, 2026: DE Registered Agent.org, pricing and service pages