LLC formation cost calculators + Connecticut
3 Best LLC Services in Connecticut (2026): Cost Calculator
Result order: The result is 41% three-year cost and 27% filing work covered, with renewal change, break-even year and input clarity filling in the rest. The formula
Main figures
Connecticut results
1. Connecticut Registered Agent.co: best for a basic start
Leads the resultsConnecticut Registered Agent.co calculates best. $199 to open, first agent year included, then $99 a year.
Cost settles it: three years here calculate to less than three years with Mainstay Filing.
Its input does not include the annual report.
Inputs covered
- The Connecticut formation filing
- Agent service for the first year
Adds up well
- Year-one agent covered
- Starts at $199
- A modest $99 renewal
Adds up badly
- The annual report remains with you
- EIN application not included ($99)
2. Mainstay Filing: best for not touching the annual report again
Full packageNext in the results, Mainstay Filing: inputting $199 a year covers the filing, the registered agent and the annual report, with year two at $199.
Three years cost $200 more here than with Connecticut Registered Agent.co.
Connecticut bills $80 for the annual report, and the service hands that on without markup.
Inputs covered
- Formation delivered to the state office
- Registered agent for the full year
- Annual report, filed when due
- EIN application prepared
- No markup on government fees
Adds up well
- A single yearly input of $199
- No extra fee for the EIN application
- Year two calculates to $199
Adds up badly
- $100 more a year than Connecticut Registered Agent.co after year one
3. CT Registered Agent.org: best for a local formation service
Connecticut focusCT Registered Agent.org holds position 3 because $199 to open, first agent year included, then $99 a year.
Its input does not include the annual report.
Its inputs match Connecticut Registered Agent.co's exactly.
Inputs covered
- The Connecticut formation filing
- Agent service for the first year
Adds up well
- Starts at $199
- Year-one agent covered
- A modest $99 renewal
Adds up badly
- The annual report remains with you
- EIN application not included ($99)
What each service adds up to
| Rank | Service | Result, year 1 | Result, year 2 | Result, year 3 | Result, year 5 | |
|---|---|---|---|---|---|---|
| 1 | Connecticut Registered Agent.co | $199 | $298 | $397 | $595 | Open Connecticut Registered Agent.coPartner link. We may earn money if you buy. |
| 2 | Mainstay Filing | $199 | $398 | $597 | $995 | Open Mainstay FilingPartner link. We may earn money if you buy. |
| 3 | CT Registered Agent.org | $199 | $298 | $397 | $595 | Open CT Registered Agent.orgPartner link. We may earn money if you buy. |
The calculator
State fees with sources
| Input | Amount | Source |
|---|---|---|
| Filing to form the LLC | $120 | business.ct.gov {input read October 2026, shown in full} |
| Annual report | $80 every year | business.ct.gov {input read October 2026, shown in full} |
| What the state collects by year 3 | $280 | Inputs added together |
Notes on the order
For Connecticut, the deciding term was calculated three-year cost (41% of the formula), where Connecticut Registered Agent.co came out ahead.
A three-year run with Connecticut Registered Agent.co calculates to $397, while Mainstay Filing runs $200 higher.
Add the EIN application as an input and Mainstay Filing's total passes Connecticut Registered Agent.co's in year 2.
How Connecticut describes its LLC filing fee and filing requirements
The Connecticut Secretary of State accepts the Certificate of Organization plus $120, as Conn. Gen. Stat. § 34-247 provides. Every LLC must name a registered agent with an in-state street address.
Official text: business.ct.gov {input read October 2026, shown in full}
Filing it yourself
File alone and Connecticut still bills $280 over three years, with every form on your desk. A service charging $397 to $597 removes that work.
Questions
What do LLC formation services cost in Connecticut?
Budget $199 plus $120 in state fees.
What do these services calculate to over three years?
Service results after three years: $397 to $597.
How much does Connecticut charge to file an LLC?
$120 is due when you submit the Certificate of Organization.
What does Connecticut charge each year after formation?
The repeating input is the annual report, at $80 annually (on or before March 31).
Is the EIN application part of the price?
Looking at each in turn: Connecticut Registered Agent.co charges $99, Mainstay Filing comes with it and CT Registered Agent.org charges $99.
When does one service pass another in total cost?
They hold one order for ten years.
Which LLC formation service calculates best in Connecticut?
Ranked results: Connecticut Registered Agent.co, Mainstay Filing and CT Registered Agent.org.
Input sources
- Check Connecticut Secretary of the State against business.ct.gov; entered August 2026.
- Check Connecticut Secretary of the State against business.ct.gov; entered August 2026.
- Check Connecticut yearly filing: Annual report against business.ct.gov; entered October 2026.
- Check Connecticut report due date against cga.ct.gov; entered August 2026.
- Check Connecticut formation fee: Filing fee against business.ct.gov; entered October 2026.
- Check Connecticut formation fee: Filing fee against business.ct.gov; entered October 2026.
- Connecticut Registered Agent.co pricing page, entered November 13, 2026
- Mainstay Filing Connecticut service page, entered November 13, 2026
- CT Registered Agent.org pricing page, entered November 13, 2026