From PASPA to the Present: The Supreme Court and Sports Betting Policy
Last updated: March 2026. For information only. Not legal advice. 21+.
Cold open
In 2018, the Supreme Court did not “make sports betting legal.” It took off a federal freeze and gave the choice back to the states. Since then, the map has changed fast, but not in one way. Some states move quick. Some move slow. A few still say no. You can see the spread of state-by-state legalization here. The result is a patchwork. It is messy at times. But it shows what the Court really did: it reset who gets to decide.
A law that froze time (PASPA in one page)
From 1992 to 2018, one short law did a lot. It was PASPA, the Professional and Amateur Sports Protection Act. It told most states, “You may not allow sports betting.” A few states had old carve-outs. Nevada was the big one. In effect, PASPA froze the map. If your state had legal sports betting before, you could keep it. If not, you could not add it. You can read the old text of PASPA (28 U.S.C. §§ 3701–3704).
Why did the Supreme Court strike PASPA in 2018? The core idea is a rule called the “anti-commandeering doctrine.” In plain words, the federal government may not order a state to pass or keep a state law. Congress can regulate people and firms. But it cannot force a state to ban or allow something in its own code. This idea comes from cases like New York v. United States (1992). PASPA broke that line. It told states they could not change their laws. That is why it fell.
The domino in 2018: Murphy v. NCAA
In Murphy v. NCAA (2018), the Court held PASPA unconstitutional. It said Congress cannot tell states to keep sports betting illegal. Note the Court did not bless sports betting. It simply removed a federal bar that blocked states from acting. After this, each state could choose to allow or ban sports betting, set rules, taxes, and so on.
If you want a plain case walk-through, SCOTUSblog has a good case overview and analysis. The key line many miss is this: the Court focused on state power, not on the merits of betting. So the ruling opened a door. It did not say what must come through it.
Also note what Murphy did not decide. It did not settle how other federal laws apply to online play, to payment rails, or to cross-border traffic. It did not set a tax plan. It did not rule on league “official data.” It left big parts of policy to Congress, the DOJ, and the states. For a short list of those open items, see this Congressional Research Service brief.
What the states actually built
After 2018, states built many models. Some allow online and retail. Some allow only retail at casinos or stadiums. Some let only tribes run it. A few use high taxes. Others use lower rates or let promos offset tax. New Jersey is a clear, early example of a state with strong rules and open online play; see the Division of Gaming Enforcement for how one state set it up.
Tribal nations also play a key role. They work under compacts with states and the U.S. Department of the Interior. In some places, tribes partner with brands to offer mobile apps. In others, compacts allow on-site only. The lay of the land is complex and local. For background, see the CRS report on tribal-state compacts and Indian gaming.
Online play needs strict tools. Apps must know you are in a legal state. They use geolocation and KYC (know your customer). This cut fraud and keeps bets in bounds. A look at login pings and blocks can be found in GeoComply insights. Payments also run checks due to a 2006 law (UIGEA), so cards and ACH may have extra screens.
Federal vs. state levers after PASPA (quick map)
Here is a simple table to show who holds which lever, and what changed after 2018.
| PASPA repeal via Murphy | Federal (judicial) | PASPA no longer blocks states from legalizing | New Jersey launched fast and set a model | States can authorize and regulate sportsbooks | Supreme Court opinion |
| Wire Act interpretations | Federal (DOJ/OLC; courts) | 2011 memo narrowed reach; 2018 memo tried to broaden; 2021 1st Cir. limited DOJ view | New Hampshire Lottery v. DOJ | Cross‑border routing risk affects iGaming/sports bets and payments | 2011 OLC; 2018 OLC; 1st Cir. 2021 |
| UIGEA payment rails | Federal (statute, banks) | Banks and processors must block illegal online gambling payments | Merchant codes, ACH checks in sportsbooks | Early friction for deposits; now better but still screened | 31 U.S.C. §§ 5361–5367 |
| State licensing & tax | States | Rates and promo rules vary; operator caps differ | NY high tax vs. CO promo deductions | Different hold, prices, and product mix by state | NCSL tracker |
| Tribal gaming compacts | Tribal/State/Federal (Interior) | Some compacts allow mobile via tribal partners; others are on‑site only | Florida compact litigation history | Who may offer mobile; where a bet is “placed” | CRS on Indian gaming |
| Integrity monitoring | Shared (leagues, books, regulators) | More alerts; rise of official league data deals | IBIA annual alerts; NCAA rules | Faster flags on suspect bets; higher data costs | IBIA report |
| Revenue outcomes | States/Industry | Gross gaming and tax grow, but vary by market | High hold in some promo‑heavy states | Budget plans must be realistic | AGA revenue tracker |
Winners, caveats, and the tax math nobody loves
Many states see strong handle and hold. Yet tax haul is not always what early slides showed. Promo credits cut tax in some states. High rates change prices and may dampen volume. This is normal in a young market. A review by the Pew Charitable Trusts found that sports betting tax often falls short of projections, at least at first.
Costs also rose. Books pay for data, ads, and tech to block fraud. Leagues and books fund integrity systems. There are fees for official data in live bets. These inputs cut into margin. Over time, promo spend tends to drop. Markets then settle. States sometimes amend tax rules too. When you compare states, look at rate, deductions, and whether promos are capped or phased out.
Players also deal with tax duty. Winnings are income. Records matter. If you win big, the book may issue a form. The IRS has a plain guide at Topic No. 419. This is not tax advice. It is a nudge to plan ahead.
The integrity and data fights
Since 2018, the line between sports and betting is closer. That brings risk. Young adults bet more. College rules are strict. The NCAA posted a 2023 study on this shift; read the NCAA survey on sports betting among young adults. Many states ban bets by insiders. Some ban certain college prop bets. Apps use flags on sharp moves. Leagues and books share alerts faster now.
Integrity units and trade groups help. The International Betting Integrity Association tracks alerts across members. It is one view, but it shows how a modern market can spot issues early. This is a work in progress. Data feeds get better. Models improve. Bad actors adapt too.
Congress has looked at this. In 2018, the Senate held a hearing on ways to “protect the integrity” of sport. You can see the record here: U.S. Senate Judiciary hearing. No broad federal law came out of it. But the issue did not go away. Expect more talk if there is a big scandal or if college sports raise new risks.
Q&A interlude: five fast answers policymakers still want
Did the Supreme Court legalize sports betting?
No. The Court struck PASPA. That gave states the power to choose. Many chose to allow. Some did not.
Does the Wire Act still matter?
Yes. The Wire Act is a 1961 law on bets sent across state lines. In 2011, DOJ said the law mainly covers sports bets. In 2018, DOJ tried to expand that view. In 2021, a federal court limited the 2018 move. The law still matters for how data and money flow. You can read the 2018 memo here: DOJ OLC 2018 opinion.
Do we need a new federal law?
Maybe, but not to run a full market. States already license and tax. A narrow bill could set floor rules on integrity, ads, or data privacy. It could fund cross‑state probes. It should avoid telling states how to write their own codes.
What about tribes?
Tribal gaming runs under federal law and state compacts. Some compacts allow mobile statewide. Others do not. The details are local and legal. Courts watch how compacts define where a mobile bet is “placed.”
Is there a federal crime for fixing games?
Yes. There is a law on sports bribery and match fixing. See 18 U.S.C. § 224. States also have their own crimes. Leagues add their own bans and checks.
A global glance to set our sights
It helps to look abroad, but with care. The U.K. is far along. The UK Gambling Commission sets rules on ads, data, and safer play tools. It has years of case work and fines to point to. The U.S. is not the U.K., but there are lessons: clear data rules help; slow checks at signup hurt; strong KYC helps trust.
On integrity in sport, the U.N. and IOC have a joint guide. It is broad and non‑binding, but it gives a frame on threats and best steps. See the UNODC–IOC handbook. U.S. leagues, schools, and books can use parts of that playbook, with local tweaks.
If Washington moves again (sensible steps)
Big, one‑size federal rules would clash with Murphy and with state practice. But small, sharp tools could help. Here are four that fit the frame:
- Fund a federal hub to link integrity alerts across states and leagues.
- Set a clear, narrow rule on what counts as “official data” in live bets, or leave it to contracts but bar forced terms.
- Clarify Wire Act scope for intra‑state internet traffic that may cross state lines in transit.
- Support research on harm, ads, and youth risk; tie grants to strong safer play rules.
For a neutral list of options and risks, see the CRS review of issues for Congress. The best moves are narrow and respect state roles.
A bettor’s practical minute
How do you check if a book is legal in your state? First, look for a state seal and license number in the app or footer. Then, match that name on the state list of approved sites. Here is an example list from the Colorado Division of Gaming. If you do not see the brand on your state list, do not use it.
If you want plain guides and side‑by‑side notes before you pick an app, independent review hubs help you spot license details and key terms. For a short, non‑pushy overview (in Swedish), see mer information här. Always choose legal books. Set limits. Do not chase losses.
Method notes and how this analysis leans
This piece leans on primary law and neutral bodies. We link to the Supreme Court, DOJ/OLC, federal courts, CRS, NCSL, UKGC, UNODC, IBIA, NCAA, AGA, Pew, IRS, and state regulators. Where data changes fast (tax math, integrity alerts), we update on a regular cycle. We avoid claims we cannot source. If you see an error, tell us and we will fix it.
Short case study: New Jersey as a spark
New Jersey fought PASPA for years. After Murphy, it launched in weeks, not months. Books went live at casinos and on phones. Handle grew, then leveled, then grew again. NJ’s clear rules on geolocation, KYC, and ads set a tone for other states. It was not perfect. But it showed that fast rollout and strong controls can go together.
Key terms you may see
- PASPA: A 1992 law that blocked most states from legal sports betting. Struck down in 2018.
- Anti‑commandeering: A rule that the federal government cannot force states to pass or keep state laws.
- Wire Act: A 1961 law on interstate bets sent by wire (now also read for the internet).
- UIGEA: A 2006 law that makes banks block payments linked to illegal online gambling.
- Official league data: Data sold by leagues for live bets; subject to deals and debate.
- Compact: A deal between a tribe and a state, approved by Interior, that sets gaming terms.
FAQ
Is sports betting legal under federal law?
There is no broad federal law that bans state‑legal sports betting. Murphy ended PASPA’s block. Other federal laws still apply to payments, fraud, and cross‑state issues.
What did Murphy v. NCAA actually decide?
It said Congress cannot force states to keep bans in place. States may choose to allow or ban sports betting. It did not tell states what model to use.
Does the Wire Act affect state‑legal online betting?
It can. The law targets cross‑state bets and some transmissions. DOJ memos and court rulings shape how it applies. Most legal apps route data to comply, but rules still evolve.
How do state taxes on sportsbooks work?
States set their own rates. Some allow promo deductions. High rates can change prices or offers. Budget plans should not assume year‑one hype lasts forever.
Are college athletes allowed to bet?
No. College and many pro rules ban insider betting. States also ban bets by athletes, coaches, refs, and staff. Some states limit college prop bets as well.
So what now?
The Supreme Court reset the board. States took the lead. The market is young, and it will change. Narrow federal action could help on integrity and clarity, but broad preemption would clash with the Court’s line. For players, the rule is simple: use legal apps, know the tax basics, and bet only what you can lose. For lawmakers, test, measure, and adjust. For leagues and books, share data fast and keep rules tight where it counts most.
Disclaimers and disclosures
- This article is for information only and is not legal, tax, or investment advice.
- Wager only where lawful and if you are of legal age (usually 21+).
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