The Onyx Slots welcome bonus gives new UK players up to £400 in bonus funds plus 200 free spins across two qualifying deposits. With a £20 minimum deposit per stage, you can unlock the full package without committing a large sum, or deposit the maximum on each to extract every penny of match value. Either way, the Onyx Slots welcome offer ranks among the more accessible multi-stage packages available to UK players right now.
The 35x wagering requirement applies to bonus funds only, not to your deposit — a distinction that matters when you're calculating how much you actually need to wager before withdrawing. Paired with a library of 3,000+ slots and live tables from providers including Pragmatic Play, NetEnt and Evolution, you have enough choice to clear wagering without grinding through the same title on repeat.
Claim OfferThe Onyx Slots casino welcome bonus splits across your first two deposits. Each stage carries its own match percentage, free spin allocation and wagering requirement, so you can plan your sessions before committing a penny.
| Deposit | Match % | Max Bonus | Free Spins | Min Deposit | Wagering |
|---|---|---|---|---|---|
| 1st Deposit | 100% | £200 | 100 Spins | £20 | 35x bonus |
| 2nd Deposit | 50% | £200 | 100 Spins | £20 | 35x bonus |
| TOTAL | — | £400 | 200 Spins | £40 total | 35x each |
Your first deposit doubles, up to £200. Put in £150 and you play with £300 — £150 of your own money and £150 in bonus funds. The 100 free spins appear in your account within minutes of the deposit processing. The 100% match rate on this first stage is the highest rate available in the entire package; the second deposit drops to 50%, so front-loading your first deposit extracts the most value per pound deposited.
The second stage of the Onyx Slots sign up offer carries a 50% match up to £200. To receive the full £200 bonus from this stage you need to deposit £400. Depositing less still earns you the proportional 50% match. A second batch of 100 free spins follows the deposit.
One timing rule matters here: activate the second deposit bonus only after you've cleared the wagering requirements on the first one. Onyx Slots does not permit two active bonuses running concurrently, and starting the second stage early typically forfeits your remaining first-stage bonus.
The combined maximum from both deposits is £400 in bonus funds and 200 free spins. You unlock the full package with a minimum total deposit of £40 — or up to £600 deposited if you're going for the absolute maximum match at each stage.
Claiming the Onyx Slots new customer offer takes five steps. Each one has a bearing on whether your bonus lands without issue.
The 35x wagering requirement means you multiply the bonus amount by 35 to get the total sum you need to wager before the bonus converts to withdrawable cash. Your deposit is not included in that calculation — only the bonus funds Onyx Slots credited to your account.
| Bonus Received | Wagering Req. | Total to Wager |
|---|---|---|
| £20 | 35x | £700 |
| £100 | 35x | £3,500 |
| £200 (1st deposit max) | 35x | £7,000 |
| £200 (2nd deposit max) | 35x | £7,000 |
Onyx Slots applies different contribution rates depending on the game you play during an active bonus. Video slots count in full. Table games and live casino do not.
| Game Type | Contribution Rate |
|---|---|
| Video Slots | 100% |
| Classic Slots | 100% |
| Blackjack / Roulette | 10% |
| Live Casino Tables | 5% |
| Video Poker | 10% |
| Progressive Jackpot Slots | Excluded — check terms |
In practice: £100 wagered on blackjack at 10% contribution adds only £10 towards your requirement. You'd need 10x as many rounds on blackjack to match what 100 spins on a qualifying slot contributes. Stick to eligible video slots while clearing the bonus.
Onyx Slots gives you seven days from bonus activation to complete the wagering requirement. The clock starts from the moment the bonus lands in your account, not when you first spin. Any uncleared bonus and associated winnings expire after that window. Your real-money balance stays untouched.
Onyx Slots caps the permitted stake per spin or round while a bonus is active. Placing a bet above this cap while you have an active bonus can void the entire bonus and forfeit any winnings accumulated with it. Check the current maximum bet limit in the Onyx Slots bonus terms before you start a session.
The 200 free spins in the Onyx Slots welcome package split evenly: 100 on the first deposit, 100 on the second. Winnings from free spins carry the same 35x wagering requirement as the deposit match bonus.
| Deposit | Free Spins | Credited | Spin Value | Expiry |
|---|---|---|---|---|
| 1st Deposit | 100 | Within minutes | £0.20 | 72 hours |
| 2nd Deposit | 100 | Within minutes | £0.20 | 72 hours |
At £0.20 per spin, 100 spins carry a face value of £20. At a standard 96% RTP you'd expect returns of roughly £19.20 from that batch — then multiply by 35 to get the wagering obligation on those winnings: around £672. Spin winnings are relatively modest, so use them promptly and treat them as an add-on rather than the centrepiece of the offer.
Free spins expire 72 hours after they're credited. Use them in your first session after each deposit. Unused spins disappear once the window closes, and Onyx Slots does not reissue them.
The 100% match on deposit one is twice the rate of deposit two. Every extra pound you put in at the first stage earns you a pound in bonus funds — at the second stage, it takes two pounds of deposit to earn one pound in bonus. Deposit £200 on day one if your budget allows it.
Choosing slots above 97% RTP reduces the house edge considerably. Over thousands of spins, a 97% RTP title returns roughly £97 per £100 wagered on average — compared to £94 or £95 on lower-paying games. That difference compounds across the volume required to clear a £7,000 wagering requirement.
| Slot | Provider | RTP | Volatility |
|---|---|---|---|
| Blood Suckers | NetEnt | 98.0% | Low |
| 1429 Uncharted Seas | Thunderkick | 98.5% | Low |
| Book of 99 | Relax Gaming | 99.0% | High |
| Starmania | NextGen | 97.9% | Medium |
| Jackpot 6000 | NetEnt | 98.8% | Low |
Free spins expire in 72 hours regardless of what else is happening with the bonus. Run through them in your first session, bank the winnings into your bonus balance, then shift to the deposit match funds. This order removes the 72-hour pressure from your planning entirely and gives you the full seven-day window for the main wagering work.
Submitting a withdrawal while a bonus is still active at Onyx Slots cancels the bonus and forfeits accumulated winnings tied to it. Check your wagering progress in the account area before hitting the cashier. If you've completed the requirement, the funds convert to cash and you can withdraw freely.
Live casino tables contribute only 5% towards wagering. A £100 bet at a live roulette table adds £5 to your progress. To hit a £7,000 wagering requirement that way, you'd need to stake £140,000 on live games. Slots at 100% contribution are the only sensible choice for clearing the bonus efficiently.
At £400 in bonus funds and 200 free spins, the headline value sits comfortably among mid-tier UK welcome packages. The 35x wagering requirement on bonus funds only (not on the combined deposit plus bonus) is a materially better condition than operators who apply wagering to the full sum, at a rate of 40x or higher. That distinction alone can shave thousands of pounds off the amount you need to wager before withdrawing.
The two-deposit structure extends your engagement with the platform across different sessions rather than concentrating everything on day one. From a practical standpoint, you're less likely to burn through the entire package in a single sitting.
The areas to approach with care are the seven-day wagering window and the 72-hour free spin expiry. If your schedule doesn't allow multiple sessions per week, clearing a £7,000 wagering requirement before the deadline takes planning. At £2 per spin on an eligible slot, you need roughly 3,500 spins — around eight to ten hours of play depending on pace. Manageable for regular players, tighter for someone who dips in once a week.
Onyx Slots holds a UK Gambling Commission licence and provides a full set of player protection tools through your account settings.