The Connecticut gambling tax applies the state’s regular income tax rates — from 2% to 6.99% — to every dollar you win from casinos, sports betting, the lottery, poker, horse racing, fantasy sports, raffles, and any other wager. There is no separate gambling rate, and there is no loss deduction on the state return. That last point is the one that costs Connecticut gamblers the most: even if you lost more than you won for the year, the state still taxes the full amount of your winnings.
What Winnings Connecticut Taxes
If it came from a wager, it counts. Slot machines, table games, sports bets placed retail or online, lottery prizes, horse racing, poker tournaments, fantasy sports, bingo, and raffles all produce taxable income. Winnings from Connecticut’s licensed online platforms are taxed the same as winnings collected in person at Mohegan Sun or Foxwoods.1Connecticut Department of Revenue Services. Connecticut Income Tax Treatment of Gambling Winnings Other Than State Lottery Winnings
Connecticut’s return begins with your federal adjusted gross income, which already includes all gambling winnings under federal rules. So there is no separate line on the state form where you write in your winnings, and there is no way to leave them out.2Connecticut General Assembly. Income Tax Treatment of Gambling Winnings and Losses in Connecticut
One reporting note. Payers issue Form W-2G once winnings hit certain thresholds — $2,000 in 2026 for most game categories — but a W-2G is only a reporting document.3Internal Revenue Service. Instructions for Forms W-2G and 5754 (Rev. January 2026) You owe tax on every gambling win regardless of whether you receive one. A $1,500 slot hit generates no form but is still fully taxable.
Connecticut Income Tax Rates on Winnings
Your gambling winnings pile onto your other income and get taxed in the bracket your total income reaches. The rates for 2026 are unchanged from 2024:4Connecticut General Assembly. Connecticut Income Tax Rates and Brackets Since 1991
- 2% on the first $10,000 for single filers, $20,000 for joint filers
- 4.5% up to $50,000 single, $100,000 joint
- 5.5% up to $100,000 single, $200,000 joint
- 6% up to $200,000 single, $400,000 joint
- 6.5% up to $250,000 single, $500,000 joint
- 6.9% up to $500,000 single, $1,000,000 joint
- 6.99% on income above those thresholds
Consider a single filer with $60,000 in wages who wins $15,000 at a casino. Total income becomes $75,000. The first $10,000 is taxed at 2%, the next $40,000 at 4.5%, and the remaining $25,000 at 5.5%. The winnings themselves do not get a special rate; they simply land in whichever brackets your combined income reaches.
Withholding Before You File
The Connecticut Lottery Corporation withholds state tax at 6.99% on all reportable lottery prizes, whether the winner lives in Connecticut or not.5Connecticut Department of Revenue Services. Connecticut Tax Guide For Payers of Nonpayroll Amounts For non-lottery gambling, Connecticut withholding at 6.99% kicks in when the payer has a Connecticut business presence, the payment is subject to federal withholding, and the payment goes to a Connecticut resident.2Connecticut General Assembly. Income Tax Treatment of Gambling Winnings and Losses in Connecticut In practice, Mohegan Sun and Foxwoods withhold Connecticut tax on large payouts to residents.
Federal withholding is separate: a flat 24% on winnings of $5,000 or more from sweepstakes, wagering pools, lotteries, and sports wagering. If you do not give the payer a taxpayer ID, backup withholding of 24% applies even to smaller reportable amounts.6Internal Revenue Service. Instructions for Forms W-2G and 5754
A large lottery prize paid to a Connecticut resident can therefore have nearly 31% held back before the check goes out. Both withholdings are credits against your actual tax liability, not extra taxes. If too much was withheld, you get it back when you file.
Losses Do Not Reduce Your Connecticut Tax
Federal law lets you deduct gambling losses up to the amount of your winnings if you itemize on Schedule A.7Internal Revenue Service. Topic No. 419, Gambling Income and Losses Connecticut does not. The Department of Revenue Services states plainly that gambling losses are not deductible for Connecticut income tax purposes, even when they are deductible federally.1Connecticut Department of Revenue Services. Connecticut Income Tax Treatment of Gambling Winnings Other Than State Lottery Winnings
The math is unforgiving. Say you won $30,000 across various sessions and lost $25,000 in others during the same year. Federally, you can offset the $25,000 in losses against your winnings, so only $5,000 gets taxed. On your Connecticut return, you owe state tax on the full $30,000. There is no adjustment, no offsetting line, no compensating credit. For a filer in the 6% bracket, that produces a state bill approaching $2,000 on gambling income even though the year netted only $5,000.
The reason is structural. Connecticut’s tax starts from federal AGI, and the federal gambling loss deduction is an itemized deduction that sits below AGI, meaning it never touches the number Connecticut uses.
The Professional Gambler Exception
Someone who qualifies as a professional gambler under federal law reports gambling on Schedule C as a trade or business. Wins and losses net out there, and only the net flows into federal AGI, so a professional’s losses effectively reduce Connecticut taxable income too. Qualifying is hard. The IRS looks at whether gambling is your primary income, whether you keep business-like records, and whether you pursue it with the regularity and profit motive that mark a trade.
Filing Your Connecticut Return
Residents report on Form CT-1040. Because your federal AGI already contains your winnings, no separate entry is needed on the state form.
You must file a Connecticut return if your gross income exceeds the state’s threshold for your filing status. For the 2025 tax year (filed in 2026), those thresholds are roughly $15,000 for single filers, $24,000 for married filing jointly, $19,000 for head of household, and $12,000 for married filing separately.1Connecticut Department of Revenue Services. Connecticut Income Tax Treatment of Gambling Winnings Other Than State Lottery Winnings A single sizable win can push you across that line by itself.
If your income falls below the filing threshold but Connecticut tax was withheld from your winnings, the state does not refund the withholding automatically. File a return to get it back.
Nonresidents and Part-Year Residents
Nonresidents get a break that surprises many people. If you live in another state and win at a Connecticut casino, on a Connecticut sports betting app, or through any non-lottery game, you owe no Connecticut income tax. Non-lottery gambling income is not treated as Connecticut-source income for nonresidents.2Connecticut General Assembly. Income Tax Treatment of Gambling Winnings and Losses in Connecticut
Connecticut Lottery prizes are the exception. Those count as Connecticut-source income for nonresidents, the Lottery Corporation withholds 6.99% regardless of the winner’s home state, and the nonresident files Form CT-1040NR/PY to reconcile.8Connecticut State Department of Revenue Services. Connecticut Income Tax Treatment of State Lottery Winnings Received by Residents and Nonresidents of Connecticut
Part-year residents pay Connecticut tax only on winnings received during the months they lived in the state. Winnings collected before moving in or after moving out are not taxed by Connecticut. Part-year residents also use Form CT-1040NR/PY.2Connecticut General Assembly. Income Tax Treatment of Gambling Winnings and Losses in Connecticut
Estimated Payments After a Big Win
A mid-year win can create an estimated payment obligation. Connecticut requires quarterly estimated payments if you expect to owe more than $200 in state tax after withholding. This comes up most often when winnings arrive from a source that does not withhold Connecticut tax, like an out-of-state casino or an online platform that only handles federal withholding.
Connecticut follows a quarterly schedule roughly matching the federal deadlines of April 15, June 15, September 15, and January 15 of the following year.9Taxpayer Advocate Service. Making Estimated Payments If you hit a jackpot and nothing was withheld for Connecticut, sending in a payment soon after is the cleanest way to avoid interest charges.
Records to Keep
The IRS and Connecticut DRS can both question reported figures and disallow claimed federal losses if you cannot document them. The IRS expects a contemporaneous gambling diary — notes kept as you go, not reconstructed at tax time.
Your diary should show:
- The date and type of each session
- The name and location of the casino, track, or platform
- The amounts won and lost per session
- The names of anyone with you
Back it up with W-2G forms, casino win/loss statements, betting platform histories, losing tickets, and bank records tied to gambling activity.7Internal Revenue Service. Topic No. 419, Gambling Income and Losses
Records matter for Connecticut even without a state loss deduction. Your federal loss claim depends on them, and the winnings figure on your federal return is the one that flows straight to your Connecticut return. Underreporting winnings on either side creates trouble on both.