Best casino sign up bonuses
The casino welcome bonus is usually the largest offer you'll ever receive at a single site, so it's worth taking the time to compare your options before you commit. All five online casinos below are fully licensed, available to US players, and offering strong sign-up packages right now. Here's what each one has on the table.
| Casino | Welcome bonus | Other offers |
|---|---|---|
| BetMGM | $25 no deposit + 100% match up to $1,000 |
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| DraftKings | 1,500 Flex Spins with a $5 wager |
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| FanDuel | 500 bonus spins + $40 casino bonus with $10 deposit |
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| bet365 | 100% match up to $1,000 + up to 1,000 spins with $10 deposit |
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| Playstar | 100% match up to $500 + up to 500 spins across first 3 deposits |
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BetMGM Casino - $25 no deposit + 100% match up to $1,000
BetMGM offers one of the most compelling casino welcome packages available to US players. You start with a $25 no deposit bonus just for creating an account, which is one of the few genuine no deposit offers at a major licensed US casino.
After that, your first deposit is matched 100% up to $1,000, giving you a meaningful amount of extra funds to explore the game library. The wagering requirement on the deposit match is 15x, which is well below the industry average and makes clearing the bonus genuinely attainable.
Beyond the sign-up offer, BetMGM runs a steady rotation of existing player promotions including weekly prize pools, slot-specific Bet & Get offers, and a refer-a-friend bonus worth $100 per successful referral. The MGM Rewards loyalty program ties your online play to MGM's wider ecosystem, meaning points earned at the casino can be redeemed for hotel stays and other perks at MGM properties.
The game library runs to 1,000+ titles covering slots, table games, live dealer, and video poker, with a particularly strong live casino section. BetMGM is one of the few US online casinos to offer truly exclusive live dealer tables, including branded blackjack and roulette rooms.
Payment options are extensive, with PayPal, Play+, online banking, and cash at cage all available for both deposits and withdrawals, with most payouts processed within 24 to 48 hours. The mobile app is highly rated at 4.8 on iOS and integrates the casino and sportsbook under one account.
| 🎁 Welcome bonus | $25 no deposit + 100% match up to $1,000 |
| 📋 Wagering requirement | 15x on deposit match, 20x on no deposit bonus |
| 💵 Min. deposit | $10 |
| 🎰 Number of games | 1,000+ |
| 🌎 Available states | MI, NJ, PA, WV |
DraftKings Casino - 1,500 Flex Spins with a $5 wager
DraftKings takes a different approach to the online casino sign up bonus, offering 1,500 Flex Spins instead of a deposit match. What makes this stand out is the flexibility: rather than locking you into a single game, you can choose from over 100 eligible slot titles each day.
Spins are issued at 50 per day over 30 days and carry no wagering requirement on winnings, so anything you pick up is yours to keep. You only need to wager $5 to unlock the full offer, which is one of the lowest entry points among major US casino bonuses.
For existing players, DraftKings runs regular leaderboard competitions, daily Rocket Boost promotions, and a strong refer-a-friend program. The Dynasty Rewards loyalty program earns you Crowns on every bet, redeemable for DK Dollars or exclusive rewards.
The game library covers 1,400+ titles with a particularly impressive selection of exclusive slots, many of which are linked to a site-wide progressive jackpot pool. The live dealer section is strong, powered by Evolution Gaming, and covers blackjack, roulette, baccarat, and game show titles.
DraftKings is also one of the best-built casino apps available in the US, rated 4.8 on iOS and 4.7 on Android, with a unified wallet that connects the casino, sportsbook, and daily fantasy accounts. Payment options include PayPal, Venmo, Play+, Apple Pay, and online banking, with e-wallet withdrawals typically processed within 24 hours.
| 🎁 Welcome bonus | 1,500 Flex Spins with a $5 wager |
| 📋 Wagering requirement | No wagering on spin winnings |
| 💵 Min. deposit | $5 |
| 🎰 Number of games | 1,400+ |
| 🌎 Available states | MI, NJ, PA, WV |
FanDuel Casino - 500 spins + $40 casino bonus
FanDuel's casino welcome bonus is one of the cleanest on this list. Deposit $10 and you receive 500 bonus spins plus $40 in casino credits, with no wagering requirement on the spins and a straightforward 1x requirement on the bonus funds. The spins come in daily batches of 50 over 10 days, and any winnings go straight into your withdrawable balance. It's a beginner-friendly offer that doesn't require you to read pages of fine print before claiming.
FanDuel keeps existing players engaged with the daily Reward Machine, which gives you three free spins every day for a chance to win casino credits, and the monthly Rewards Club adds another layer of ongoing value.
The casino library runs to 850+ games with a strong selection of exclusive slots alongside a well-built live dealer section. FanDuel is one of the easiest casinos to navigate, with a clean, intuitive interface that works particularly well on mobile.
The iOS app is the highest-rated on this list at 4.9 stars. Payment options include PayPal, Venmo, Play+, debit cards, and ACH, with withdrawals typically processed within 24 to 48 hours. If you already use FanDuel for sports betting or daily fantasy, everything connects under one account, which is a meaningful convenience.
| 🎁 Welcome bonus | 500 spins + $40 casino bonus |
| 📋 Wagering requirement | No wagering on spins, 1x on casino bonus |
| 💵 Min. deposit | $10 |
| 🎰 Number of games | 850+ |
| 🌎 Available states | MI, NJ, PA, WV |
bet365 Casino - 100% match up to $1,000 + up to 1,000 spins
bet365 offers a two-part welcome package that covers both a deposit match and a free spins offer, making it one of the more complete online casino sign up bonuses available right now. The 100% deposit match goes up to $1,000 with a $10 minimum deposit, and the 1,000 spins are revealed over 10 days with no wagering requirement on any winnings.
The deposit match carries a 30x wagering requirement, which is on the higher side, but the generous ceiling and the wager-free spins component balance it out well.
Existing players benefit from weekly free spin promotions, a blackjack streak cash reward, and regular weekend jackpot slot tournaments with prize pools up to $25,000. Note that the welcome offer is only available through the mobile app, so downloading it is a required first step for new players.
bet365 brings its global casino experience to a strong US product, with a game library of 1,500+ titles that includes one of the best live dealer sections available to US players, with 50+ tables powered by Playtech. The slots library is deep and well-organized, covering Megaways titles, progressive jackpots, and a growing collection of exclusive games.
Withdrawals are notably fast, often processed within a few hours via PayPal or debit card, and the mobile app holds a 4.8 iOS rating. The main drawback is that bet365 doesn't offer a traditional VIP or loyalty program, which most competing US casinos do.
| 🎁 Welcome bonus | 100% match up to $1,000 + up to 1,000 spins |
| 📋 Wagering requirement | 30x on deposit match, no wagering on spins |
| 💵 Min. deposit | $10 |
| 🎰 Number of games | 1,500+ |
| 🌎 Available states | NJ, PA |
Playstar Casino - 100% match up to $500 + up to 500 spins
Playstar's welcome bonus is structured differently from the others on this list. The 100% deposit match up to $500 applies to your first deposit, while the 500 free spins are spread across your first three deposits at 100, 200, and 200 spins respectively.
The spins carry no wagering requirement, and the deposit match comes with a 30x requirement. You'll need to deposit at least $20 each time and be at least 25 years old to qualify, which is a higher minimum age than most other US casinos.
Where Playstar stands out is in its ongoing player rewards. The PlayStar Club VIP program is one of the better loyalty schemes at a US online casino, offering weekly cashback up to $1,000, reload bonuses, and gift card rewards for regular players. The Tuesday blackjack natural promotion rewards consecutive natural blackjacks with cash bonuses, making it a particularly strong option for table game players.
The game library covers 1,200+ titles including 1,100+ slots from providers like NetEnt, IGT, and Light & Wonder, alongside a strong live dealer section powered by Evolution Gaming with 50+ tables. Playstar also features exclusive Star Jackpots progressive titles you won't find anywhere else.
The mobile app is polished and highly rated at 4.5 on iOS and 4.2 on Android, with the full game library accessible on both platforms. Customer support is available via live chat with notably fast response times of around 30 seconds.
| 🎁 Welcome bonus | 100% match up to $500 + up to 500 spins |
| 📋 Wagering requirement | 30x on deposit match, no wagering on spins |
| 💵 Min. deposit | $20 |
| 🎰 Number of games | 1,200+ |
| 🌎 Available states | NJ only |
How to claim casino sign up bonuses
Claiming a casino welcome bonus is straightforward at all of our recommended sites. The process is almost identical across the board and takes just a few minutes from start to finish. Here's how it works.
- Click one of our links: Use the links or banners on this page to visit your chosen casino. This ensures your visit is tracked correctly and that the welcome offer is automatically available to you.
- Create your account: Fill in the registration form with your personal details including your name, email address, date of birth, and the last four digits of your Social Security number. Some casinos let you sign up instantly using a Google or Facebook account.
- Enter a bonus code if required: Most casinos on our list apply the welcome bonus automatically, but some require you to enter a promo code during registration or on the deposit page. Check the offer terms to see if a code is needed before you proceed.
- Verify your identity: You'll need to confirm your email address and phone number before your account is fully active. Some casinos may also ask you to upload a copy of your ID, particularly before your first withdrawal.
- Opt in to the welcome offer: Some casinos require you to opt in to the bonus through the promotions tab before making your deposit. Check whether this step is required at your chosen casino to make sure you don't miss out.
- Make your qualifying deposit: Head to the cashier and deposit at least the minimum required amount using an eligible payment method. Your bonus funds or free spins will be credited to your account automatically in most cases.
- Meet the wagering requirement and withdraw: Play through your bonus according to the stated requirements, then withdraw your winnings using your preferred payment method once the conditions are met.
Types of casino bonuses
Not all casino bonuses work the same way. Knowing what each type offers and how it works helps you pick the right one and get the most out of it. Here's a breakdown of the most common types you'll come across at licensed US online casinos.
💰 Welcome bonus / deposit match
The deposit match is the most common form of casino welcome bonus. The casino matches your first deposit by a set percentage up to a maximum amount. For example, a 100% match up to $1,000 on a $200 deposit gives you $200 in bonus funds to play with. BetMGM and bet365 both offer strong deposit match bonuses, with bet365's going up to $1,000 and BetMGM's reaching up to $1,000 in most states. Always check the wagering requirement before claiming.
🎁 No deposit bonus
A no deposit bonus is credited to your account just for registering, with no financial commitment required. BetMGM is one of the few major US casinos that offers a genuine no deposit bonus, giving new players $25 in free credits on sign-up. These bonuses are smaller than deposit offers but carry no risk, making them ideal for testing a casino before you commit.
🎰 Free spins bonus
Free spins bonuses give you a set number of spins on eligible slot games at no cost. DraftKings offers 1,500 Flex Spins with just a $5 wager, while FanDuel and bet365 both include spins as part of their welcome packages. The best free spins offers carry no wagering requirement on winnings, meaning anything you pick up is yours to keep.
🔄 Reload bonus
A reload bonus is a deposit match offered to existing players on subsequent deposits. It works the same way as a welcome deposit match but is available to returning players rather than new ones. Most casinos offer these periodically through their promotions tab, and they typically come with lower match percentages than the initial welcome offer.
💸 Cashback bonus
Cashback bonuses return a percentage of your net losses over a set period, usually as bonus funds. Playstar's VIP program includes weekly cashback of up to $1,000 for loyal players, making it one of the more generous cashback structures at a US online casino. Cashback is a good ongoing benefit for regular players since it provides a safety net during losing periods.
🏆 Loyalty and VIP bonuses
Most casinos reward regular play through a points-based loyalty program. BetMGM's MGM Rewards, DraftKings' Dynasty Rewards, and Playstar's PlayStar Club all give you points for every real money wager, which can be converted into bonus funds, free spins, or other perks. Higher tiers unlock better rewards, faster withdrawals, and in some cases dedicated account managers.
📺 Live casino bonuses
Some casinos offer bonuses specifically for live casino games. bet365 runs a blackjack streak bonus where winning consecutive hands on live tables earns you cash rewards, while BetMGM offers dedicated live dealer promotions through its weekly prize pool campaigns. These are worth looking out for if you prefer table games over slots, since most standard bonuses are slot-focused. You can also find dedicated roulette bonuses at select casinos.
Best online casinos
Get 200% More Coins on First Purchase - 1.5M CC + 75 SC
- Library of 500+ slot games
- Well-known software providers
- Fair games with certified RNGs
25 SC and 25K GC signup bonus
- Features social live dealers
- Top software providers
- Exclusive and original Stake.us titles
Get up to 500K Gold Coins + 105 FREE SC + 1000 VIP points
- 100,000 GC + 2.5 SC welcome bonus
- Slots, table games, and arcades
- 25+ renowned software providers
200% Extra: 300,000 Gold Coins + 30 SC
- Offers over 1,000 casino-style games
- Offers commission-based referral program
- Games are from reputable providers
GC 120,000 + Free SC 60 + a chance to win Free SC 500
- 1,000+ casino-style games
- Games sourced from top-rated providers, such as Playtech
- Slots and live social dealer games are available
What are casino bonus codes and do you need them?
Casino bonus codes, sometimes called promo codes, are short strings of text that you enter during registration or on the deposit page to unlock a specific welcome offer. They're a common feature at online casinos, but they're not always required.
At most of the casinos we recommend, the best online casino bonus is applied automatically when you sign up through one of our links, with no code needed. DraftKings, FanDuel, and Playstar all work this way. BetMGM occasionally offers enhanced welcome packages that require a specific code to unlock the full value, so it's worth checking whether a code applies before you register.
When a code is required, you'll typically enter it in a designated field during the registration process or on the cashier page when making your first deposit. Missing this step can mean you receive a lower-value offer or no bonus at all, so it's always worth double-checking before you proceed. All current codes for our recommended casinos are listed on each individual casino page.
Terms and conditions of online casino bonuses
Every casino bonus comes with terms attached, and reading them before you claim is always worth the few minutes it takes. The table below explains the most important terms you'll encounter and gives you a realistic idea of what to expect.
| Term | What it means | Typical value |
|---|---|---|
| Wagering requirement | The number of times you must play through your bonus funds before you can withdraw any winnings. A 15x requirement on a $100 bonus means you need to place $1,500 in bets before cashing out. | 1x to 30x (1x to 15x at top US casinos) |
| Minimum deposit | The smallest deposit amount that qualifies you for the bonus. Depositing less than this means the bonus won't be triggered. | $5 to $20 |
| Maximum bonus amount | The highest value of bonus funds the casino will award, regardless of how much you deposit. Depositing $2,000 on a 100% match up to $1,000 still only earns you $1,000 in bonus funds. | $500 to $2,500 |
| Eligible games | Not all games contribute equally toward clearing your wagering requirement. Slots typically count 100%, while table games and live dealer often count 10% to 20% or not at all. | Slots 100%, table games 10-20% |
| Bonus expiry | The time limit within which you must meet the wagering requirement before the bonus and any associated winnings are removed from your account. | 7 to 30 days |
| Maximum win cap | Some casinos limit how much you can withdraw from bonus winnings, regardless of how much you win. Not all US casinos apply this restriction, but it's worth checking. | $500 to unlimited (varies by casino) |
| Opt-in requirement | Some bonuses require you to manually activate the offer in the promotions section before or after depositing. Failing to opt in means the bonus won't be applied. | Required at select casinos |
Are casino bonuses legal in the US?
Yes, casino bonuses are completely legal in states where online casino gambling has been legalized and regulated. Licensed operators in these states are permitted to offer welcome bonuses, free spins, no deposit bonuses, and ongoing promotions to both new and existing players. The bonuses are subject to oversight by the relevant state gaming authority, which means the terms must be fair, transparent, and clearly disclosed.
In states where real money online casino gambling is not yet legal, licensed operators cannot offer these bonuses to residents. If you're in a restricted state, sweepstakes casinos are a legal alternative that offer free coin bonuses and promotional offers under a different legal model. You can find our top picks on our sweepstakes casino promo codes page, including the best sweepstakes no deposit bonuses available right now.
| State | Casino bonuses legal? | Regulator |
|---|---|---|
| New Jersey | Yes | NJ Division of Gaming Enforcement |
| Pennsylvania | Yes | PA Gaming Control Board |
| Michigan | Yes | Michigan Gaming Control Board |
| West Virginia | Yes | WV Lottery Commission |
| Connecticut | Yes | CT Department of Consumer Protection |
| Delaware | Yes | Delaware Lottery |
| Rhode Island | Yes | Rhode Island Lottery |
| All other states | Not for real money casinos | Sweepstakes casinos available as alternative |
Sweepstakes casino bonuses
If you're in a state where real money online casino bonuses aren't available yet, sweepstakes casino sign up bonuses are a legitimate and genuinely rewarding alternative. You play with Gold Coins for fun and Sweeps Coins, which can be redeemed for real prizes, and every site on our list hands out a generous free bonus just for creating an account. No deposit required.
The bonuses at sweepstakes casinos work differently from a traditional casino welcome bonus, but the value on offer is comparable. Some of the no-purchase packages below are worth hundreds of thousands of coins, giving you plenty of playtime before you ever consider spending anything.
| Casino | No-purchase bonus | First purchase bonus | Bonus review |
|---|---|---|---|
| CrownCoins | 100,000 CC + 2 SC | Up to 1.5M CC + 75 SC | CrownCoins sign up bonus |
| Stake.us | 25,000 GC + 25 SC | N/A | Stake.us sign up bonus |
| LoneStar Casino | 100,000 GC + 2.5 SC | Up to 500K Gold Coins + 105 SC + 1000 VIP points | LoneStar Casino sign up bonus |
| SpinQuest | 100,000 GC + 2 SC | 200% extra up tp 300,000 GC + 30 SC | SpinQuest sign up bonus |
| McLuck | 7,500 GC + 2.5 SC | Up to 120,000 GC + 60 SC | McLuck sign up bonus |
How we rate casino bonuses
Not every casino bonus that looks generous on the surface is actually worth claiming. We evaluate each offer against a consistent set of criteria to make sure our recommendations reflect real value, not just headline numbers. Here's what we look at.
💵 Headline value and minimum deposit
We start with the total potential value of the offer and how much you need to deposit to unlock it. A $1,000 match bonus is meaningless if it requires a $1,000 deposit to claim. We favor offers with low minimum deposits that deliver strong value, like DraftKings' 1,500 spins for a $5 wager.
📋 Wagering requirements
This is one of the most important factors we assess. A low wagering requirement means your bonus winnings are genuinely attainable. We prefer bonuses with requirements of 15x or lower, and we always flag any offers where the wagering is significantly above the industry norm.
🎮 Eligible games and game contributions
We look at which games you're allowed to play with your bonus funds and how much each game type contributes toward clearing the wagering requirement. Bonuses that allow a wide range of games and give fair contribution rates to table games score higher in this category.
⏰ Expiry period and bonus terms clarity
We assess how much time you're given to meet the wagering requirement and whether the terms are clearly written and easy to understand. A 7-day window is tight; 30 days is more reasonable. We also flag any unusual restrictions buried in the fine print.
🔄 Ongoing promotions and loyalty value
A strong welcome bonus is worth less if the casino has nothing to offer beyond it. We evaluate the quality and frequency of existing player promotions, reload offers, and loyalty programs, since these determine the long-term value of choosing one casino over another.
📱 Ease of claiming via app
We check whether the full bonus experience is available through the casino app, including the ability to opt in, deposit, and track your progress toward clearing wagering requirements. A bonus that can only be claimed on desktop loses points in this category.
Tips for using online casino bonuses
Getting real value from a casino bonus comes down to knowing how to use it. Here are a few practical tips that apply to most offers you'll encounter at licensed US online casinos.
Read the terms before you deposit
The wagering requirement, eligible games, expiry period, and minimum deposit all affect whether a bonus is actually worth claiming. Spending two minutes reading the terms before you deposit can save you a lot of frustration later, especially if you prefer table games over slots.
Focus on slots to clear wagering requirements faster
Slots almost always contribute 100% toward meeting your wagering requirement, while table games and live dealer typically contribute far less, sometimes as little as 10%. If you need to clear a wagering requirement, playing slots is the most efficient way to do it.
Don't chase losses with bonus funds
Bonus funds are a way to extend your playtime, not a tool for recovering losses. If your session isn't going well, step back rather than increasing your bet size to try to clear the requirement faster. This approach usually leads to burning through your bonus without meeting the conditions.
Keep an eye on the promotions tab for existing player offers
Most players claim their welcome bonus and then forget to check back. The promotions tab is updated regularly with reload bonuses, free spin offers, and limited-time competitions that can add consistent value to your play beyond the sign-up offer.
Claim your no deposit bonus before depositing
If a casino offers a no deposit bonus alongside a welcome deposit match, claim the no deposit bonus first and play through it before making any deposit. This lets you get a feel for the casino and potentially build your balance before you put any real money in.
Claim casino bonuses and gamble responsibly
Casino bonuses are designed to enhance your experience, but they can also make it easier to spend more than you intended, particularly when a wagering requirement gives you a reason to keep playing. It's worth setting a budget before you claim any bonus and deciding in advance how much time you're willing to spend working through the terms.
All licensed US online casinos are required to offer responsible gambling tools including deposit limits, session time limits, cooling-off periods, and self-exclusion options. These are available in your account settings and can be set up before you start playing. If you feel like gambling is becoming a problem, free and confidential support is available from the following organizations:
- National Council on Problem Gambling (NCPG) — 24/7 helpline, chat, and text support. Call or text 1-800-522-4700.
- Gamblers Anonymous — Peer support groups based on a 12-step recovery program, with meetings available across the US.
Conclusion - Get Those Casino Sign Up Offers!
When you sign up to an online casino you need to know that you’re going to be getting access to the most suitable bonus codes and offers for your needs and the circumstance of your betting journey. Give yourself a head start by reading through our guides, so you know what to expect from each operator. Then check out our reviews and see what other site visitors have to say about their experiences.
We’ll point you in the direction of the best casino bonus codes so you can track down the ones that have the most to offer. Then you can settle down and start enjoying the promotion that gives you the best potential opportunities.
Top Providers
Get 200% More Coins on First Purchase - 1.5M CC + 75 SC
- Library of 500+ slot games
- Well-known software providers
- Fair games with certified RNGs
25 SC and 25K GC signup bonus
- Features social live dealers
- Top software providers
- Exclusive and original Stake.us titles
Get up to 500K Gold Coins + 105 FREE SC + 1000 VIP points
- 100,000 GC + 2.5 SC welcome bonus
- Slots, table games, and arcades
- 25+ renowned software providers
200% Extra: 300,000 Gold Coins + 30 SC
- Offers over 1,000 casino-style games
- Offers commission-based referral program
- Games are from reputable providers
GC 120,000 + Free SC 60 + a chance to win Free SC 500
- 1,000+ casino-style games
- Games sourced from top-rated providers, such as Playtech
- Slots and live social dealer games are available
Casino Bonus Codes FAQ
What is the best online casino bonus right now?
The best casino bonus depends on what you're looking for. BetMGM's $25 no deposit plus 100% match up to $1,000 offers the most overall value for players who want both a free start and a deposit match. DraftKings' 1,500 Flex Spins is the strongest option for slot players who want extended playtime from a minimal deposit of just $5. Use our comparison table above to find the right fit for your state and playing style.
Do I need a casino bonus code to claim a welcome offer?
Not always. Most of our recommended casinos apply the best casino bonus automatically when you sign up through our links, with no code required. DraftKings, FanDuel, and Playstar all work this way. BetMGM sometimes offers enhanced packages that require a code to unlock the full value. Always check the offer terms before registering to see whether a code is needed.
What does wagering requirement mean?
A wagering requirement tells you how many times you need to play through your bonus funds before you can withdraw any winnings. For example, a $100 bonus with a 15x wagering requirement means you need to place $1,500 in bets before you can cash out. Slots usually contribute 100% toward clearing the requirement, while table games and live dealer often contribute much less.
Can I claim a casino welcome bonus more than once?
No. Welcome bonuses are for new players only and can only be claimed once per person at each casino. Attempting to claim a welcome bonus with a second account is a violation of the casino's terms and conditions and will result in your account being closed. Existing players can access ongoing promotions and reload bonuses through the casino's promotions tab.
Are online casino bonuses available in my state?
Casino bonuses are available in states where online casino gambling is legal, which currently includes New Jersey, Pennsylvania, Michigan, West Virginia, Connecticut, Delaware, and Rhode Island. If you're outside these states, you won't be able to claim real money casino bonuses, but sweepstakes casino sign up bonuses are available as a free-to-play alternative in most US states.
What is a no deposit casino bonus?
A no deposit bonus is a casino bonus that's credited to your account just for signing up, with no deposit required. BetMGM offers one of the few genuine no deposit bonuses at a major licensed US casino, giving new players $25 in free credits on registration. These bonuses are smaller than deposit match offers but carry no financial risk, making them a great way to try a new casino before committing your own money.
What is the difference between a casino bonus and free spins?
A casino bonus typically refers to bonus funds credited to your account, usually as a deposit match, that can be used across a range of games. Free spins are specifically for slot games and give you a set number of spins at a fixed value without using your own balance. Many welcome packages combine both, like bet365's offer which includes a deposit match and up to 1,000 free spins.