Best Casino Welcome Bonus & Sign Up Offers UK in December

Best First Deposit Bonus Casino UK: December Top Pick

After analyzing the terms of over 20 UK casinos, the Paddy Power Welcome Bonus stands out for its exceptional value. For a complete breakdown of this offer and the brand's features, you can read our full Paddy Power Review.

Paddy Power takes the top spot this month by removing the biggest hurdle new players face: wagering requirements. While most casinos require you to replay winnings 30x or 40x, Paddy Power allows you to keep your winnings in cash immediately.

• The Offer: 260 Free Spins (60 No Deposit + 200 on Deposit).
• Why it wins: You get 60 spins just for registering, plus another 200 when you deposit and play just £10. It is rare to see a package of this size with zero wagering requirements attached.
• Promo Code: PGCDE1
• Key Terms: New customers only. 60 Free Spins on sign up. Deposit and wager £10 to receive the remaining 200 spins. No wagering requirements on spin winnings.

Best Sign-Up Bonus Offers in December 2025

A casino welcome bonus is the big warm hug for new players - meaning it is one of the first offers you’ll claim when joining a new online casino. It’s usually triggered when you register and make your first real-money deposit. 

A casino new customer offer typically combines a deposit match with a set of free spins. They're often the most generous offers a casino provides, and are made to make your first spin or bet a thrill. For example, with BetMGM “Get up to £200 Extra + 100 Free Spins”, if you deposit £200, they’ll add another £200. That gives you £400 to play with from the start, plus 100 free spins on Big Bass Splash. 

Latest Casino Bonuses

Explore the Latest Casino Bonuses for new players with our complete guide. We are committed to bringing you up-to-date information on all the brands you can find on our website.

What is a Casino Sign Up Bonus?

Sign-up casino bonuses such as bonus cash, free spins, or cashback, give you more spins, bets, or chances to win without you having to break the bank when you join. They are typically offered to first-time players as an incentive to join. It’s a way for the casino to say “cheers for signing up”. There are various offers to get you started, including 100% deposit match bonuses and free-spins-no-deposit UK bonuses. Let’s dig into the different types below to get you clued up on the new casino sign-up bonuses available.

Which Types of Sign-Up Bonuses Exist?

Some welcome bonuses shower you with extra cash when you deposit, while others toss in free spins, and some even give cashback to help soften the blow if luck is not on your side. Here’s the lowdown on the different types of bonuses so you can take advantage of the best casino welcome bonuses out there.

• Deposit Match Bonus
• Free Spins
• Reload Bonus
• No Deposit Bonus
• Cashback Bonus
• No Wager Bonus

Deposit Match Bonus

A deposit match bonus is usually a reward for new players who choose to register and make a deposit at a new online casino. The operator adds extra funds equivalent to the amount of the player’s deposit, typically a 100% match. 

A good example is Luna Casino, which offers a 100% match bonus up to £50 as part of its welcome package. So, a £50 deposit would give you an additional £50 in bonus funds. On the other hand, BetMaze provides a more generous welcome offer with a 100% bonus up to £75, giving players more flexibility depending on their budget.

While it’s most commonly linked to welcome offers, a matched bonus can also be offered as part of ongoing promotions, giving existing players a reason to return, reload and keep playing.

Free Spins

Free spins are bonuses that can only be used on online slots. They can come solo or as part of a free spins welcome bonus. The best part is that free-spins-no-deposit UK deals let you spin just for signing up - no cash needed. Even sweeter are free-spins-no-deposit-no-wager offers, where you keep your winnings with no strings attached.

They’re commonly linked to popular games like Big Bass Bonanza, Gates of Olympus or Buffalo King Megaways. The number of spins and the value of each one depends on the offer but most come with wagering requirements that need to be met before you can withdraw any winnings.

Some of the best free spins offers include the William Hill 200 free spins deal, a free spins welcome offer perfect for new customers. If you're after new customer free spins, these types of promotions are a great way to get started.

Reload Bonus

A casino reload bonus is a reward for existing players to thank them for sticking around. It refers to extra cash or spins a casino gives you when you top up your account after your first deposit and has a lower match rate, like 50% up to £50. For example, deposit £100 with a 50% reload bonus, and you get £50 extra. 

While deposit match bonuses are typically larger and offered to new players, reloads bonus keep you playing longer with smaller boosts. Some may require a promo code or come with wagering requirements, so it’s always worth checking the terms on the casino’s site.

No Deposit Bonus

A casino no-deposit bonus is a gift reward you get from a casino just for signing up without making any deposit. A casino may decide to give £10 free or 20 free spins as a no-deposit bonus. They are a brilliant way to try out a casino without risking your own dosh, though they often come with trickier wagering rules. Some offers may also include withdrawal limits or time restrictions, so always check the terms.

The good thing is, if it doesn’t live up to your expectations, you’re free to walk away, no deposit means no commitment.

Cashback Bonus

Casino cashback offers are meant to give you back a bit of your losses. For instance, 10% cashback up to £50 means if you lose £200, you get £20 back. It’s a nice little perk that helps with bankroll management. You might see it as cash or bonus funds, but terms could include wagering or a cap on returns.

No Wager Bonus

No-wager bonuses are bonus cash or a free-spins-no-deposit-no-wager offer where any winnings are yours to keep or cash out without any hoops to jump through. For example, if you win £20 from free spins, you can withdraw it straight away. No-wager bonuses - often seen in new customer casino offers with no wagering or a casino sign up bonus with no wagering - are much rarer, but when you spot one, it’s like hitting a mini jackpot. Just be sure to check the terms, as some casinos may cap your maximum winnings or set a time limit on how long the bonus is valid.

How Do Casino Welcome Bonuses Work?

Snagging a casino bonus is as easy as grabbing a coffee. Here’s how it usually goes:

1. Sign Up: Join a UK-licensed casino with a quick form—name, email, job done.
2. Deposit Some Cash: Add funds (unless it’s a free-spins-no-deposit UK deal).
3. Grab Your Bonus: It might pop up automatically, or you’ll need a promo code.
4. Get Playing: Use your bonus on games like slots or roulette.
5. Clear the Rules: Meet any wagering requirements (like betting 35x the bonus) to cash out your winnings.

What to Consider When Choosing a Casino Bonus?

Picking a casino bonus is like choosing your favourite dish as it’s gotta hit the spot. Here’s what to keep in mind:

• Wagering Requirements: It’s better to take a £50 bonus with 20x wagering (£1,000) than a £100 bonus with 40x (£4,000), as the latter is much harder to clear.
• Bonus Amount vs. Match %: A 200% match up to £50 might suit you better than 100% up to £200 if you’re playing small.
• Game Eligibility: Some bonuses are slots-only or tied to games like Starburst. Check your faves are included.
• Mobile Vibes: Love gaming on your phone? Make sure the bonus works smoothly on mobile.
• Your Style: Big spenders might go for high-match bonuses, while newbies might love free-spins-no-deposit UK deals.
• UKGC License: Only play at casinos licensed by the UK Gambling Commission—keeps things safe and fair.

Terms and Conditions That Might Apply

A casino welcome bonus, also known as sign-up offers, are exclusively for users who do not have an existing account with that bookmaker. These are a great way to get started but usually these promotions are only available once per player and they always come with terms attached. When searching for the best welcome offers, it is important to consider factors such:

Wagering Requirements

These are like the laps you need to run before cashing out. A £100 bonus with 30x wagering means betting £3,000 before you can withdraw your bonus. Go for lower numbers to make it quicker to attain or learn how to beat wagering requirements in online casinos.

Game Restrictions

Not all games count the same toward wagering. Slots usually give 100%, but table games like blackjack might only chip in 10%. So, a £10 slot bet counts as £10, but a £10 blackjack bet might only be £1.

Time Limits

Bonuses don’t hang around forever—most expire in 7–30 days. If you’ve got a bonus with a 35x wagering requirement and 14 days expiry date, then you should plan your play to avoid missing out.

Maximum Winnings

Some bonuses cap your wins. A free-spins-no-deposit UK deal might limit you to £50. Win more, and the extra’s gone—so check the fine print.

How to Claim Your Casino Welcome Bonus as a New Customer?

Every casino’s got its own groove, but claiming a best casino welcome bonus usually looks like this:

1. Pick a UKGC-licensed casino from our latest casino promotions list.
2. Hit “Join” or “Register” on their site.
3. Fill in your details—name, email, you know the drill.
4. Pop in some cash (unless it’s a no-deposit bonus).
5. Enter the casino promo code if needed.
6. Your bonus lands—time to have some fun!