Onyx Slots holds a UK Gambling Commission licence — you can verify the number in the site footer — and targets players who want a slot-heavy library without sacrificing live dealer options. The lobby filters by provider, category, and jackpot type, which saves time when you know what you're after. Deposits via PayPal and Visa debit post in seconds, and the mobile site runs without a download. This Onyx Slots casino review covers everything from the welcome bonus terms to how long withdrawals actually take.
Claim OfferOnyx Slots casino UK greets new accounts with a 100% deposit match up to £200 plus 50 free spins. Deposit £100 and you play with £200; the 50 spins land on selected slot titles. The wagering requirement is 35x the bonus amount — a £100 bonus means £3,500 in qualifying wagers before you can withdraw anything derived from it. You have seven days to clear it.
Beyond the welcome offer, Onyx Slots runs a weekly reload and a weekend free spins promotion for existing accounts. The VIP tier is invitation-only but delivers meaningful perks: faster withdrawal processing, a dedicated account manager, and offers matched to your actual play patterns rather than generic promotions.
| Bonus Type | Offer | Wagering | Validity | Eligibility |
|---|---|---|---|---|
| Welcome Bonus | 100% match up to £200 + 50 free spins | 35x bonus | 7 days | New players |
| Weekly Reload | 50% match up to £100 (Thursdays) | 30x bonus | 7 days | All players |
| Weekend Free Spins | 20 free spins on £20+ deposit | 20x spins winnings | 3 days | All players |
| Weekly Cashback | 10% on net losses, up to £50 | None | Weekly | All players |
| VIP Programme | Bespoke offers, faster withdrawals, account manager | Varies | Ongoing | By invitation |
Get BonusWagering requirements apply to all bonuses. Read the full terms on the Onyx Slots promotions page before depositing. The 35x requirement on the welcome bonus is on the bonus amount only, not your deposit.
The library at Onyx Slots online casino runs to several thousand titles across slots, table games, live dealer, and jackpot categories. NetEnt, Play'n GO, Pragmatic Play, and Red Tiger cover the bulk of the slot content. Evolution Gaming handles the live casino floor. You can filter by provider or category from the main lobby, or search directly if you know the title.
Slot depth is where Onyx Slots earns its name. The catalogue includes high-volatility titles like Gates of Olympus and Book of Dead alongside lower-variance options for players who prefer steadier return cycles. Pragmatic Play's live tournament slots feature regularly in the promotions calendar, which adds a competitive layer on top of standard play.
Blackjack comes in six variants with different rule sets and side bet configurations. Roulette offers European and French formats. Baccarat and Casino Hold'em round out the card game section. Each table lists RTP clearly, so you can compare before sitting down.
Evolution Gaming powers every live table at Onyx Slots. Lightning Roulette, Live Blackjack, Crazy Time, and Deal or No Deal are all present. HD streams hold up on mobile connections, and the table limits range from £1 to several hundred pounds per round, covering both casual play and higher stakes.
Mega Moolah, Divine Fortune, and a handful of Red Tiger daily jackpot titles carry the progressive section. Onyx Slots displays the current jackpot totals on each game tile, so you can see live values without opening the game.
| Category | Example Titles | Providers | RTP Range |
|---|---|---|---|
| Slots | Gates of Olympus, Book of Dead, Sweet Bonanza, Starburst | Pragmatic Play, Play'n GO, NetEnt, Red Tiger | 94–96% |
| Table Games | Blackjack, European Roulette, Baccarat, Casino Hold'em | Various | 95–99% |
| Live Casino | Lightning Roulette, Live Blackjack, Crazy Time | Evolution Gaming | 96–99% |
| Jackpot Slots | Mega Moolah, Divine Fortune, Daily Jackpot titles | Microgaming, NetEnt, Red Tiger | Varies |
Onyx Slots has no dedicated app for iOS or Android. The site runs in your mobile browser — Safari on iPhone, Chrome on Android — and scales well down to small screens. The lobby, account section, live casino, and cashier all function without layout issues. Live streams on Evolution tables hold at HD quality over 4G without notable buffering.
To save the site to your home screen on iOS, tap the Share button in Safari and choose "Add to Home Screen." On Android, tap the three-dot menu in Chrome and select "Add to Home screen." Either creates a shortcut that opens the site in full-screen mode, which is the closest the experience gets to a native app.
The login button sits at the top right of every page. Enter your registered email and password, then click confirm. If you forget your password, the reset link goes to your email address within a few minutes. Onyx Slots also supports two-factor authentication via your registered mobile number — worth enabling if you use the same password across multiple accounts.
Register NowUK gambling law banned credit cards for deposits in April 2020. At Onyx Slots casino UK, you deposit with Visa or Mastercard debit, PayPal, Pay by Phone (Boku), or Open Banking via Faster Payments. All four methods post funds to your account balance without delay.
| Method | Processing Time | Min Deposit | Fees |
|---|---|---|---|
| Visa / Mastercard Debit | Immediate | £10 | None |
| PayPal | Immediate | £10 | None |
| Pay by Phone / Boku | Immediate | £10 | None |
| Open Banking / Faster Payments | Immediate | £10 | None |
| Method | Processing Time | Min Withdrawal | Fees |
|---|---|---|---|
| PayPal | Up to 24 hours | £20 | None |
| Visa / Mastercard Debit | 2–5 business days | £20 | None |
| Bank Transfer | 3–5 business days | £20 | None |
Onyx Slots verifies your identity before releasing the first withdrawal. Upload your ID and proof of address through the account verification section as soon as you register — that way, when you request a payout, there's no added delay waiting for document review.
The UKGC licence obligates Onyx Slots to provide a full set of safer gambling tools. You can set deposit limits, loss limits, and session time limits from within your account settings. Cooling-off periods and self-exclusion are available too. Self-exclusion through GamStop covers all UKGC-licensed sites at once — one registration blocks access across the board rather than site by site.
BeGambleAware runs a 24-hour National Gambling Helpline at 0808 8020 133. Links to both BeGambleAware and GamStop appear in the Onyx Slots footer on every page. If gambling stops being fun, those tools are the right starting point.
Visit CasinoGambling should be entertaining, not a way to make money. Set a deposit limit before you start playing and treat any winnings as a bonus, not an expectation. BeGambleAware — begambleaware.org — offers free, confidential advice if you have concerns about your own play or someone else's.