Why do online casinos give out 400% first deposit bonuses?

Online casinos give out 400% first deposit bonuses in order to encourage casino players to try out their platforms and consider playing there in the longer term.

Are 400% deposit bonus casino sites safe?

Yes, 400% deposit bonus casino sites are safe, as long as they're licensed and regulated by a reputable body. As well as having passed our test for safety and security, each of the 400% deposit bonus casinos we've recommended here are licensed and regulated by the Malta Gaming Authority (MGA) and/or another reputable gaming authority.

Can I keep winnings from a 400% casino deposit bonus?

Yes, you can keep your winnings from a 400% casino deposit bonus, as long as you've fulfilled the terms and conditions of the promotion.

Can I get free spins as part of the 400% casino bonus?

Yes, you can get free spins as part of a 400% casino bonus if you choose a welcome package that bundles the 400% deposit match with bonus spins.

Can I win real money with a casino 400% bonus?

Yes, you can win real money with a casino 400% bonus, just as you can with any other casino bonus offer.

400% Deposit Bonus Casinos - page 26

Alina Anisimova, Isobel Coughlan

Updated:25.6.2026

576
CasinoMega
Crypto Accepted
100% up to 300€ + 20 free spins
Main details
Bonus type1st deposit bonus+
CasinoMega matches your deposit 100% up to €300, plus you get 20 free spins worth €2 in total. Deposit at least €20 to claim it. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Time limit7 days
Wagering30 x (D+B)+
Wagering is 30x on your deposit plus bonus, which sits in the standard range. With a €100 deposit you get a €100 bonus, so €100 + €100 = €200, and €200 x 30 = €6,000 in wagers. The 20 free spins carry 30x wagering on their winnings.
CasinoMega Bonuses
18+ Full Terms Apply. Play Responsibly.

577
Casinomax
100% up to 3250€
Main details
Bonus type1st deposit bonus+
Deposit at least €35 to claim this deposit bonus at Casinomax. You get a 100% match up to €3,250 on your deposit. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit35€
Bonuses & Restrictions
Max bet10€
Wagering40 x B+
The wagering requirement is 40x on the bonus, which is above average. With a €100 deposit at 100%, you get a €100 bonus, and €100 x 40 = €4,000 in wagers.
Casinomax Bonuses
18+ Full Terms Apply. Play Responsibly.
578
Carlospin Casino
Launched 2025Crypto Accepted
100% up to 1500€ + 150 free spins
Main details
Bonus type1st deposit bonus+
Carlospin Casino matches your deposit 100% up to €1,500 and adds 150 free spins on top. Deposit at least €20 to claim it. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Wagering35 x (D+B)+
Wagering is 35x on your deposit plus bonus, which sits in the standard range. With a €100 deposit you get a €100 bonus, so €100 + €100 = €200 x 35 = €7,000 in wagers. The 150 free spins carry 35x wagering on their winnings.
Carlospin Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
579
Boomerang.bet
Crypto Accepted
100% up to 500€ + 75 free spins
Main details
Bonus type1st deposit bonus+
Boomerang.bet matches your deposit 100% up to €500 and gives you 75 free spins worth €7.50 in total on top. Deposit at least €20 to claim it. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Max bet5€
Time limit3 days
Wagering40 x (D+B)+
Wagering on the cash bonus is 40x on your deposit plus bonus, which is on the high side. With a €100 deposit you get a €100 bonus, so €100 + €100 = €200 x 40 = €8,000 in wagers. The 75 free spins carry 40x wagering on their winnings, and max bet while wagering is €5 per round. You have 3 days to clear it.
Boomerang.bet Bonuses
18+ Full Terms Apply. Play Responsibly.
580
Boomerang-bet.io
Crypto Accepted
100% up to 800€ + 200 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus from Boomerang-bet.io, which gives you a 100% match up to €800 on your deposit. You also get 200 free spins worth €20 in total. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Wagering40 x (D+B)+
The 100% match carries 40x wagering on your deposit plus bonus, which is above average. With a €100 deposit you get a €100 bonus, and €100 + €100 = €200 x 40 = €8,000 in wagers. The 200 free spins carry 40x wagering on their winnings.
Boomerang-bet.io Bonuses
18+ Full Terms Apply. Play Responsibly.
581
Boomerang-bet.com
Crypto Accepted
100% up to 500€ + 200 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus at Boomerang-bet.com. You get a 100% match up to €500 on your deposit, plus 200 free spins worth €20 in total. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Time limit10 days
Wagering55 x (D+B)+
The wagering on this offer is on the high side at 55x on your deposit plus bonus. With a €100 deposit at 100%, you get a €100 bonus, and €100 + €100 = €200 x 55 = €11,000 in wagers. The 200 free spins carry 55x wagering on their winnings.
Boomerang-bet.com Bonuses
18+ Full Terms Apply. Play Responsibly.
582
Bitz Casino
Crypto Accepted
100% up to USDT 1750
Main details
Bonus type1st deposit bonus+
Bitz Casino matches your deposit 100% up to 1,750 USDT as a reload-style deposit bonus. Deposit at least 20 USDT to claim it. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum depositUSDT 20
Bonuses & Restrictions
Time limit7 days
Wagering29 x B+
Wagering is 29x on the bonus only, which is below average. With a 100% bonus, a 100 USDT deposit gives you a 100 USDT bonus, and 100 USDT x 29 = 2,900 USDT in wagers. You have 7 days to clear it.
Bitz Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
583
Betwinner Casino
Exclusive BonusCrypto Accepted
100% up to 100€
Main details
Bonus type1st deposit bonus+
Betwinner Casino matches your deposit 100% up to €100 on your qualifying deposit. Deposit at least €1 to claim it, and use bonus code MRGAMBLE when depositing.
Minimum deposit1€
Bonuses & Restrictions
Wagering28 x (D+B)+
Wagering is 28x on your deposit plus bonus, which is below average. With a €100 deposit you get a €100 bonus, so €100 + €100 = €200 x 28x = €5,600 in wagers before you can withdraw.
Betwinner Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
584
Betroom24 Casino
Crypto Accepted
100% up to 250€ + 25 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus at Betroom24 Casino, which gives you a 100% match up to €250 on your deposit. Use bonus code BET100 when depositing, and you get 25 free spins worth €2.50 in total. Winnings from the bonus are capped at €1,250.
Minimum deposit20€
Bonuses & Restrictions
Time limit30 days
WageringNo wagering+
The bonus at Betroom24 Casino is wager-free, withdraw it any time. The 25 free spins carry 0x wagering on their winnings.
Betroom24 Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
585
Bets.io
Crypto Accepted
100% up to BTC 1 + 100 free spins
Main details
Bonus type1st deposit bonus+
Bets.io matches your deposit 100% up to 1 BTC and adds 100 free spins worth a total of 0.01 BTC. Deposit at least 0.00020 BTC to claim it. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum depositUSDT 20
Bonuses & Restrictions
Time limit14 days
Wagering40 x (D+B)+
Wagering on the cash bonus is 40x on your deposit plus bonus, which is on the above average side. With a 100% match, a Ƀ0.100 deposit gives you a Ƀ0.100 bonus, so Ƀ0.100 + Ƀ0.100 = Ƀ0.200 x 40 = Ƀ8.000 in wagers. You have 14 days to clear it, and the 100 free spins carry 40x wagering on their winnings.
Bets.io Bonuses
18+ Full Terms Apply. Play Responsibly.
586
Bet It All
Crypto Accepted
100% up to 200€ + 50 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus at Bet It All. You get a 100% match up to €200 on your deposit, plus 50 free spins worth €5 in total. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Time limit3 days
Wagering28 x (D+B)+
The €100% match at Bet It All comes with 28x wagering on your deposit plus bonus, which is below average. A €100 deposit gives you a €100 bonus, and €100 + €100 = €200 x 28 = €5,600 in wagers. The 50 free spins carry 35x wagering on their winnings.
Bet It All Bonuses
18+ Full Terms Apply. Play Responsibly.
587
Bankonbet Casino
Crypto Accepted
100% up to 500€ + 200 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus at Bankonbet Casino, which gives you a 100% match up to €500 on your deposit. You also get 200 bonus spins worth €20 in total, and no bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Max bet5€
Time limit10 days
Wagering35 x (D+B)+
Wagering is 35x on your deposit plus bonus, which sits in the standard range. With a €100 deposit at 100%, you get a €100 bonus, so €100 + €100 = €200 x 35 = €7,000 in wagers. The 200 free spins carry 40x wagering on their winnings.
Bankonbet Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
588
Azur Slot Casino
Launched 2025Crypto Accepted
100% up to 300€ + 100 free spins
Main details
Bonus type1st deposit bonus+
Azur Slot Casino matches your deposit 100% up to €300 and adds 100 free spins. Deposit at least €20 to claim it. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Max bet5€
Time limit5 days
Wagering40 x B+
Wagering on the cash bonus is 40x on the bonus amount, which is on the high side. With a €100 deposit you get a €100 bonus, and €100 x 40 = €4,000 in wagers. The 100 free spins carry 45x wagering on their winnings. Max bet while wagering is €5 per round. You have 5 days to clear it. The bonus is sticky: you play with it but only withdraw the winnings.
Azur Slot Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
589
AllySpin Casino
100% up to 500€ + 50 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus at AllySpin Casino. You get a 100% match up to €500 on your deposit plus 50 free spins. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Max bet5€
Time limit10 days
Wagering35 x (D+B)+
The 35x wagering on this cash bonus sits in the standard range and applies to both your deposit and bonus. With a €100 deposit at 100%, you get a €100 bonus, so €100 + €100 = €200 x 35 = €7,000 in wagers. The 50 free spins carry 40x wagering on their winnings.
AllySpin Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
590
Asino Casino
100% up to 300€ + 200 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus, which gives you a 100% match up to €300 on your deposit at Asino Casino. Use bonus code BOOST when depositing. You also get 200 free spins worth €20 in total.
Minimum deposit20€
Bonuses & Restrictions
Max bet5€
Time limit7 days
Wagering40 x B+
The 40x wagering on the bonus is in the standard range. With a €100 deposit at 100%, you get a €100 bonus, and €100 x 40 = €4,000 in wagers. The bonus is sticky: you play with it but only withdraw the winnings. The 200 free spins carry 30x wagering on their winnings.
Asino Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
591
30Bet
Crypto Accepted
100% up to 500€ + 50 free spins
Main details
Bonus type1st deposit bonus+
30Bet matches your deposit 100% up to €500 and gives you 50 free spins on Le Bandit, worth €5 in total. Deposit at least €20 to claim it. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Time limit30 days
Wagering35 x D+
Wagering is 35x on your deposit only, which sits in the standard range. With a €100 deposit you need to wager your €100 deposit 35 times, so €100 x 35 = €3,500 in wagers. You have 30 days to clear it, and the 50 free spins carry 35x wagering on their winnings.
30Bet Bonuses
18+ Full Terms Apply. Play Responsibly.
592
1Red Casino
Crypto Accepted
100% up to 3000€ + 50 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €30 to claim this deposit bonus at 1Red Casino and get a 100% match up to €3,000 on your deposit. You also get 50 free spins worth €5 in total. Use bonus code ONERED when depositing.
Minimum deposit30€
Bonuses & Restrictions
Max bet2€
Wagering40 x (D+B)+
The wagering is 40x on your deposit plus bonus, which is above average. With a €100 deposit at 100%, you get a €100 bonus, and €100 + €100 = €200 x 40 = €8,000 in wagers. The 50 free spins carry 40x wagering on their winnings.
1Red Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
593
24Casino
Crypto Accepted
100% up to 750€ + 150 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus from 24Casino, which gives you a 100% match up to €750 on your deposit. You also get 150 free spins. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Max bet5€
Time limit5 days
Wagering40 x (D+B)+
The wagering on this offer is 40x on your deposit plus bonus, which is above average. With a €100 deposit at 100%, you get a €100 bonus, and 100 + 100 = €200 x 40 = €8,000 in wagers. The 150 free spins carry 40x wagering on their winnings.
24Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
594
Spinbetter
Crypto Accepted
100% up to 300€ + 30 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €10 to claim this deposit bonus at Spinbetter, which gives you a 100% match up to €300 on your deposit. You also get 30 free spins on Wild Cash, worth a total of €3. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit10€
Bonuses & Restrictions
Max bet5€
Time limit7 days
Wagering35 x B+
The 35x wagering on the bonus is in the standard range. With a €100 deposit at 100%, you get a €100 bonus, and €100 x 35 = €3,500 in wagers. The 30 free spins carry 35x wagering on their winnings.
Spinbetter Bonuses
18+ Full Terms Apply. Play Responsibly.
595
Betpanda Casino
Crypto Accepted
100% up to BTC 1
Main details
Bonus type1st deposit bonus+
Deposit at least BTC 10 to claim this deposit bonus at Betpanda Casino. You get a 100% match up to BTC 1 on your deposit. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit10€
Bonuses & Restrictions
Time limit7 days
Wagering80 x D+
Wagering is on the high side at 80x and it applies to your deposit only. With a ₿100 deposit you get a ₿1 bonus, and a ₿100 deposit means ₿100 x 80 = ₿8,000 in wagers on your deposit only.
Betpanda Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
596
Drakaris Casino
New 2026Crypto Accepted
100% up to 1000€ + 100 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus, which gives you a 100% match up to €1,000 on your deposit. Use bonus code FIRST when depositing and you get 100 free spins on Griffin's Vault.
Minimum deposit20€
Bonuses & Restrictions
Time limit7 days
Wagering35 x+
The wagering requirement is 35x on the bonus amount, which is in the standard range. With a €100 deposit at 100%, you get a €100 bonus, and €100 x 35 = €3,500 in wagers.
Drakaris Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
597
Slot Lion Casino
New 2026
100% up to 400€
Main details
Bonus type1st deposit bonus+
Deposit at least €20 to claim this deposit bonus at Slot Lion Casino. You get a 100% match up to €400 on your deposit. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit20€
Bonuses & Restrictions
Max bet5€
Time limit48 hours
Wagering25 x (D+B)+
The wagering is 25x on your deposit plus bonus, which is below average. A €100 deposit gives you a €100 bonus, so €100 + €100 = €200 x 25 = €5,000 in wagers.
Slot Lion Casino Bonuses
18+ Full Terms Apply. Play Responsibly.
598
Knight Slots Casino
100% up to 100€ + 50 free spins
Main details
Bonus type1st deposit bonus+
Deposit at least €10 to claim this deposit bonus at Knight Slots Casino, which gives you a 100% match up to €100 on your deposit. You also get 50 free spins worth €5 in total. No bonus code is needed, the bonus activates on your qualifying deposit.
Minimum deposit10€
Bonuses & Restrictions
Wagering30 x (D+B)+
The wagering requirement is 30x on your deposit plus bonus, which is in the standard range. With a €100 deposit you get a €100 bonus, so 100 + 100 = €200 x 30 = €6,000 in wagers. The 50 free spins carry 60x wagering on their winnings.
Knight Slots Casino Bonuses
18+ Full Terms Apply. Play Responsibly.

Sources

Malta Gambling Authority