When you have gambling winnings, you may be required to pay an estimated tax on that additional income. For information on withholding on gambling winnings, refer to Publication 505, Tax Withholding and Estimated Tax. Gambling Losses. You may deduct gambling losses only if you itemize your deductions on Schedule A (Form 1040 or 1040-SR) (PDF. Offset your gambling wins by writing off your gambling losses. You win some, you lose some. In this instance, you won’t owe tax on your winnings because your total loss is greater than your total win by $2,000. However, you do not get to deduct that net $2,000 loss, only the first $6,000.

Published 7:31 PM EDT Mar 24, 2019

If you're betting on the March Madness basketball tournament — or other sporting events — probably the last thing on your mind is taxes.

But taxes are relevant to gambling — and that increasingly will be the case as legal gambling spreads across the nation following a Supreme Court decision last year that gave states the green light to legalize, and tax, sports betting.

March Madness could be the largest sports-betting activity all year, with the American Gaming Association predicting 47 million people will bet a combined $8.5 billion, or 40 percent more than the public wagered on the Super Bowl.

Most of the March Madness winnings probably won't be declared for tax purposes, though it should be.

'All income is taxable unless it's excluded,' said Mark Steber, chief tax officer for Jackson Hewitt Tax Service. 'Winnings aren't excluded.'

The federal tax rules on gambling haven't changed much in recent years and weren't significantly altered by tax reform in 2017. The main provisions are:

Winnings are fully taxable and should be reported on your federal return. Gambling income includes money received from lotteries, raffles, horse races and casinos. It includes cash winnings and the fair value of prizes such as cars or vacations.
The casino or other entity paying the prize is supposed to issue you a W-2G form, especially for larger winnings. You also might be subject to federal tax withholding on larger amounts and required to pay estimated taxes.
You may deduct gambling expenses if you itemize deductions — provided that the amount of these deductions doesn't exceed the gambling income or winnings that you claim. In other words, you can claim losses up to the amount of winnings. To deduct losses, as with other expenses, you must keep records including receipts, tickets or statements, along with an accurate diary or log.
You can't reduce your gambling winnings by your gambling losses and report the difference. Rather, you report the full amount of your winnings as income and claim your losses (up to the amount of winnings) as an itemized deduction. Winnings are reported as 'other income' on Schedule 1 of Form 1040.

According to an example provided by TurboTax, if you win $5,000 this year but lose $8,000, you may deduct only $5,000. You can't deduct the remaining $3,000 or carry it forward to future years.

Gambling Winnings And Losses On Tax Return

READ MORE: New poll finds 47 million Americans will place bets, many taking Duke

Records and taxes

As noted, the IRS requires that you maintain records of your gambling activities if you hope to deduct losses. Deductible gambling expenses include travel expenses to or from a casino.

Gambling winnings also are subject to taxation by states that impose income taxes. This means that if you win while traveling, you could face taxes in that state and those imposed by your state of residence (though double taxation wouldn't apply as the home state likely would provide a credit for taxes collected by the other, Steber said).

Whether you receive a W-2 depends on how much you win, what type of gambling you engage in and how sophisticated the organizing entity is, he said. If you win $50 in an office basketball pool, it's pretty likely nobody will issue you a W-2.

Of the estimated $8.5 billion in March Madness gambling, the American Gaming Association estimates $4.6 billion will be wagered in informal March Madness brackets. It's questionable how much of the winnings from those competitions will be declared, and thus, taxed. So too for the money that Americans will wager with friends or bookies and through online websites, mostly offshore ones.

How tax reform could matter

Irs Gambling Losses

One tax reform-related change relevant to gambling is this: Because you must itemize gambling losses, it won't help if you don't have sufficient overall deductions to qualify for itemizing.

With the increased standard deduction from tax reform, fewer Americans will be able to itemize. The new standard deduction amounts are $12,000 for singles and $24,000 for married couples filing jointly.

'If you don't itemize, you won't get the benefit of gambling deductions,' Steber said.

He described the tax rules tied to gambling as somewhat mysterious and confusing to the general public, perhaps partly because most people don't often win thousands or hundreds of thousands of dollars (or more).

But when they do win big, taxpayers would be wise to seek professional tax guidance, he said.

'You won't hear much about all this if you're playing for a $100 bingo prize, but the rules are still the same,' Steber said. 'If you win, you owe, and if you don't declare the winnings, you face some risk' of hearing from federal and state tax authorities later.

Sports betting trends

The taxation of gambling is more relevant following last year's Supreme Court decision in Murphy v. the NCAA, which made it easier for states to legalize and tax sports betting.

Since then, eight states have authorized and implemented sports betting, while it has been approved but isn't operational yet in three other states and the District of Columbia, according to the American Gaming Association.

Legal sports betting is under consideration in 23 other states, including Arizona. The association has a state-by-state gambling map showing what's happening where.

Online Casino Winnings And Taxes

Meanwhile, 63 percent of Americans support the Supreme Court's decision to strike down what had been a federal ban on sports betting, according to a survey released by the American Gaming Association. But only 23 percent of respondents think professional sports leagues should be able to take a share of any betting revenue, according to the poll.

The American Gaming Association estimates that Americans wagered roughly $1 billion in legal sports betting markets in January, spread across Nevada and six Eastern and Southern states. Nevada (primarily Las Vegas) accounted for slightly less than 50 percent of the total — the first time it has taken less than half.

In other words, a slight majority of all sports betting took place in legal markets that didn't exist a year ago, the association noted. New Jersey was the second biggest state after Nevada for sports gambling, by a comfortable margin.

Reach Wiles at russ.wiles@arizonarepublic.com or 602-444-8616.

Casino Winnings And Taxes

Published 7:31 PM EDT Mar 24, 2019

Casino Winnings And Losses Taxes