The Onyx Slots welcome bonus matches your first deposit 100% up to £200, with 50 free spins credited once the deposit clears. No Onyx Slots welcome bonus code is required at the point of registration — the offer attaches to your account automatically when you meet the minimum deposit threshold. New UK players aged 18 or over, who have not previously held an account, qualify for the Onyx Slots new customer offer. If you have seen a separate Onyx Slots welcome code promoted elsewhere, enter it in the promotions field during sign-up; if not, the standard deal applies without one.
The process runs in four stages. Each one needs to be completed in order — skipping a step means the bonus either fails to trigger or expires before you can use it.
The Onyx Slots welcome offer spreads across your first three deposits. The percentage match and maximum bonus both reduce with each tier, but each stage still adds free spins on top of the cash match.
| Deposit | Match | Max Bonus | Free Spins | Wagering |
|---|---|---|---|---|
| 1st deposit | 100% | £200 | 50 | 35x |
| 2nd deposit | 50% | £100 | 25 | 35x |
| 3rd deposit | 25% | £50 | 10 | 35x |
Bonus values may change. Verify current figures on the Onyx Slots promotions page before depositing.
A 35x wagering requirement on a £200 bonus means you wager £7,000 across eligible games before Onyx Slots releases those funds for withdrawal. Deposit the amount you are comfortable spending — the bonus is a supplement, not a guaranteed return.
Wagering progress depends on which games you play. Slots clear the bonus fastest. Table games and live casino count at a fraction of the rate, so sticking to slots is the most efficient route through the requirement.
| Game Type | Contribution | Notes |
|---|---|---|
| Slots | 100% | Fastest route through the wagering requirement |
| Table games | 10% | A £10 bet adds only £1 towards the target |
| Live casino | 10% | Available but slow for bonus clearing |
| Game shows | 5% | Least efficient for wagering progress |
| Sports betting | Not included | Sports promotions run separately |
Confirm contribution rates in the bonus terms on the Onyx Slots site — these can vary by specific title.
The Onyx Slots casino welcome bonus is open to UK residents aged 18 and over who register a new account for the first time. One bonus per household, IP address, and payment method applies. Onyx Slots complies with UKGC licence conditions, which means the casino checks your identity before releasing any winnings derived from bonus funds. Having your documents ready — passport or driving licence, plus a recent utility bill or bank statement — means verification clears faster when you go to withdraw.
Some payment methods sit outside bonus eligibility. PayPal and Boku can be subject to exclusions at certain sites, so read the deposit terms for the Onyx Slots welcome offer before you choose a method. Faster Payments via Open Banking and Visa or Mastercard debit cards tend to be the most broadly accepted options.
Register NowGet BonusGambling should stay within your means. Set deposit and loss limits inside your Onyx Slots account before you play. BeGambleAware (begambleaware.org) and GamStop (gamstop.co.uk) both offer free tools to help you stay in control.