Connecticut Tax — 30 Days or Fewer

Summary

A person domiciled in Connecticut is normally a Connecticut resident for income tax, even in a year spent mostly elsewhere. The law gives an exception with three conditions that must all be met in the same year: you maintain no permanent place of abode in Connecticut, you maintain a permanent place of abode outside Connecticut for the entire year, and you spend not more than 30 days in Connecticut. If you meet them, you file as a nonresident for that year. The 31st day ends the exception. The Department of Revenue Services (DRS) applies the rule, and you must be able to show that you met it.

Limit

Not more than 30 days in Connecticut

Period

The taxable year, for most people 1 January to 31 December

A day counts when

You are in Connecticut for any part of the day, unless only in transit

Also needed

No abode in Connecticut, and an abode elsewhere for the entire year

Law

Conn. Gen. Stat. section 12-701(a)(1)(A)(i), regulation 12-701(a)(1)-1(b)

Run by

Connecticut Department of Revenue Services (DRS)

Who it applies to

• People from Connecticut on a work posting in another state or abroad who plan to return.
• Recent graduates whose domicile is still the family home in Connecticut while they rent and work elsewhere.
• People who sold their Connecticut home and live elsewhere but have not clearly changed their domicile.
• Connecticut people abroad who do not reach the 450 foreign days of the separate 548-day rule.

The rule

Domicile is the place you intend to be your permanent home and to which you intend to return when you are away. Under section 12-701(a)(1)(A) of the Connecticut General Statutes, a person domiciled in Connecticut is a resident. The regulation says a domicile continues until you move to a new place with the real intention of making your fixed and permanent home there. Moving away for a limited time does not change it, even if you sold your old home.

Section 12-701(a)(1)(A)(i) gives the exception that the tracker Connecticut Tax — 30 Days or Fewer follows. A domiciled person is not a resident if they maintain no permanent place of abode in the state, maintain a permanent place of abode elsewhere, and spend in the aggregate not more than 30 days of the taxable year in the state. The DRS regulation, section 12-701(a)(1)-1(b), sets the timing: no Connecticut abode during the year, an abode outside Connecticut during the entire year, and not more than 30 days.

The regulation says that as long as you keep meeting the three conditions you are treated as a nonresident, and that in any year when they are not met you are taxed as a resident for that year. It also puts the burden on you: a Connecticut domiciliary who claims to be a nonresident must demonstrate that the conditions were met. A person who qualifies files a nonresident return and is taxed only on income from Connecticut sources.

A second exception, added for taxable years starting on or after 1 January 2000, covers people who are in a foreign country for at least 450 days in any period of 548 days in a row, with a limit of 90 Connecticut days. It is a different count. People who are not domiciled in Connecticut are tested the other way, on more than 183 days with an abode, which the Connecticut Tax Residence tracker follows.

Why it exists

Domicile follows intention, so it can remain in Connecticut for years after a person has stopped living there. The exception recognises that a person with no home in the state, a real home somewhere else and only short visits is not using the state in the way a resident does. It gives such people a fixed line to plan against, without asking them to give up their Connecticut domicile.

Counting the days

You count the days of the taxable year on which you were in Connecticut for any part of the day. The total must be 30 or fewer, and the two home conditions must also hold.

1. Confirm that you maintained no permanent place of abode in Connecticut at any time in the year. A dwelling owned by or leased to your spouse generally counts as yours.
2. Confirm that you maintained a permanent place of abode outside Connecticut for the entire year.
3. Mark each day on which you were in Connecticut at any time, including the days you arrived and left.
4. Remove days when you were present only while in transit to a place outside Connecticut.
5. Add up the days and keep the evidence. 30 or fewer keeps the exception. 31 or more makes you a resident for the year.

Examples

A posting in Singapore

Grace is domiciled in New Haven. Her employer posts her to Singapore, where she leases a flat for all of 2026. She gave up her New Haven lease in 2025. In 2026 she is in Connecticut from 10 to 23 August (14 days) and from 20 to 31 December (12 days). That is 26 days. All three conditions are met, so she files as a nonresident for 2026.

Arrival and departure days push past the limit

Ben is domiciled in Hartford and rents a flat in Denver all year. He has no Connecticut home. He plans three visits of 9 nights each to his sister. Each visit covers 10 days, because the days he arrives and leaves count. Three visits make 30 days, which is still inside the rule. A fourth visit of one night adds 2 days and takes him to 32, so he would be a resident for the year.

A gap between homes elsewhere

Tara is domiciled in Connecticut and has no home there. She leaves her rented flat in Austin on 31 March 2026, travels for two months with no fixed home, and leases a new flat in Seattle from 1 June. She spends only 8 days in Connecticut. She did not maintain a permanent place of abode outside Connecticut during the entire year, so the exception does not apply for 2026.

Exceptions

• The exception is only for people domiciled in Connecticut. Others are tested on the 183-day rule with an abode.
• A part of a day when you are present only while in transit to a place outside Connecticut is not counted.
• A holiday cottage used only for holidays, a motel room and a barracks are generally not permanent places of abode, in Connecticut or elsewhere.
• A place kept only during a temporary stay for a particular purpose is not a permanent place of abode, so it may not satisfy the condition of an abode outside Connecticut.
• People in the armed forces who enlisted as Connecticut residents remain residents unless they meet this exception or the 548-day rule, according to DRS.

Common misconceptions

“I was out of Connecticut for more than half the year, so I am a nonresident.”

For a person domiciled in Connecticut, being away for half the year changes nothing. The limit is 30 days, and the two home conditions must also be met.

“My parents' house is not my abode because I pay nothing for it.”

Whether a dwelling is your permanent place of abode depends on whether it is permanently maintained for you, not only on ownership or a lease in your name. The days there also count toward the 30.

“The tax office must prove I was in the state.”

The regulation puts the burden on the person domiciled in Connecticut who claims to be a nonresident. You need to be able to show all three conditions.

“Qualifying once settles my status for the whole time I am away.”

The conditions are tested each taxable year. A year with 31 days, or with a Connecticut home, is a resident year.

Questions and answers

Is exactly 30 days in Connecticut allowed?

Yes. The wording is not more than 30 days, so 30 is inside the rule and 31 is outside it.

Do I pay any Connecticut tax if I qualify?

You file as a nonresident, and a nonresident is taxed on income from Connecticut sources. Income from outside Connecticut, such as a salary earned abroad, is then outside the Connecticut income tax for that year.

Does a drive along Interstate 95 through Connecticut use a day?

Not if you are present only while in transit to a place outside the state. If you stop to visit someone or to stay overnight for another reason, the day counts.

What is the 548-day rule and how is it different?

It is a second exception for people domiciled in Connecticut who are in a foreign country for at least 450 days in a period of 548 days in a row. It allows up to 90 Connecticut days in that period and has its own conditions about your spouse and minor children.

Can a couple qualify separately?

Each person is tested on their own days and homes. But a dwelling owned by or leased to your spouse generally counts as your abode too, so a spouse who keeps a home in Connecticut can cause the other spouse to fail the first condition.

What happens in the year I move back to Connecticut?

From the time you take a home in Connecticut again, the first condition fails for that year. DRS treats people who move into or out of the state during a year as part-year residents.

Sources

• Connecticut General Statutes, chapter 229, section 12-701(a)(1), resident of this state
• Regulations of Connecticut State Agencies, section 12-701(a)(1)-1, resident of this state
• Connecticut Department of Revenue Services, Resident, Part-Year Resident or Nonresident
• Connecticut Department of Revenue Services, Special Notice SN 2000(17), the 548-day rule and the resident definition

Read more: The 183-day rule: what it means and what it does not.

Other rules for United States

• Arizona Tax Residence 273 days in each calendar year
• California Tax — Visitors 181 days in each calendar year
• California Tax Residence 273 days in each calendar year
• Connecticut Tax Residence 183 days in each calendar year
• Delaware Tax Residence 183 days in each calendar year
• Hawaii Tax Residence 200 days in each calendar year
• Idaho Tax Residence 270 days in each calendar year
• Iowa Tax Residence 183 days in each calendar year

See all trackers

This page explains the rule and how the days are counted. It is not legal or tax advice. The authority decides each case on its own facts.