SlotsKing — Wager £100, Get 200 Free Spins
Wager £20 each day on slots to unlock 40 free spins on Big Bass Bonanza — 200 spins total over 5 days, winnings paid as cash
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18+ • New customers only • T&Cs apply • Please gamble responsibly
What You Get
Deposit £20 and wager £20 per day on slots to unlock that day's 40 free spins on Big Bass Bonanza (at 10p per spin). SlotsKing credits the spins after you hit the qualifying wager. Repeat each day for 5 consecutive days and you'll collect all 200 spins. Winnings land straight in your cash balance with no further wagering required.
Free spin winnings are capped at £250. With an expected return of around £18, you'd need an exceptional session to hit the cap — but it is worth knowing if variance swings heavily in your favour.
Expected Value Breakdown
The EV has two components: the expected return from 200 free spins on Big Bass Bonanza, minus the small expected cost of five daily qualifying wagers on a high-RTP slot.
| Component | Calculation | Value |
|---|---|---|
| 200 free spins at £0.10 | 200 × £0.10 × 92.05% | +£18.41 |
| 5 daily qualifying wagers | 5 × £20 × (100% − 97.07%) | −£2.93 |
| Total EV | ~£15.48 |
£15.48 is the mathematical expectation across many completions. The five qualifying wagers cost around £2.93 in expected losses — less than most similar offers, because the recommended qualifying slots (Secrets of Atlantis and Jack Hammer 2) both carry an unusually high 97.07% RTP. RTPs used: Big Bass Bonanza 92.05% (Pragmatic Play), Secrets of Atlantis / Jack Hammer 2 97.07% (NetEnt).
Step-by-Step Guide
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Register at SlotsKingCreate a new account at SlotsKing. This offer is for new customers only. Have your ID ready in case verification is required before you can claim the promotion.
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Deposit £20 using a debit cardMake a first deposit of at least £20. Your balance needs to cover the qualifying wager each day, so factor in that you will be wagering £20 on slots before your spins arrive.
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Each day: wager £20 on Secrets of Atlantis to unlock 40 spinsNavigate to Secrets of Atlantis (97.07% RTP, NetEnt) and wager £20 on it. This is the daily qualifying bet. Jack Hammer 2 (also 97.07% RTP) is a solid alternative if Secrets of Atlantis is unavailable. Use low stakes to spread the wager and reduce variance. The expected cost of each £20 qualifying wager is just £0.59, so across all 5 days your qualifying cost is around £2.93.
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Play your 40 daily free spins on Big Bass BonanzaAfter hitting the qualifying wager, your 40 free spins at £0.10 each will be credited. Navigate to Big Bass Bonanza and play them out. Whatever the spins return is added to your cash balance immediately, no wagering requirements.
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Repeat for each of the 5 daysLog back in on days 2 through 5 and repeat the qualifying wager each day to unlock the next batch of 40 spins. You do not need to make additional deposits — your original £20 deposit should still be available as long as you have not withdrawn between days.
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WithdrawOnce all 200 spins are played, withdraw your remaining deposit balance along with any free spin winnings. You are done.
Free spin winnings are credited as real money with no wagering requirements. Whatever you win from the spins is yours to withdraw straight away.
Tips for This Offer
- Set a daily reminder for all 5 days. You need to log in, place the qualifying £20 wager, and use the 40 spins each day. Missing a day means losing that batch of 40 spins.
- Secrets of Atlantis and Jack Hammer 2 are both 97.07% RTP slots, which makes the qualifying wager significantly cheaper than casinos that push you onto lower-RTP games. That is why this offer's qualifying cost (£2.93) is lower than structurally similar offers elsewhere.
- Use low stakes for the qualifying wager to reduce variance. You are not trying to win on the qualifying spin — you are just getting to the free spins as cheaply as possible.
- Big Bass Bonanza is a medium-variance slot. Your 40 daily spins will produce different results each day — some days will be above the expected value, some below. Over 200 spins the numbers should trend toward the long-run expectation.
- The £250 cap on free spin winnings is very unlikely to be hit at 10p per spin, but it is worth knowing if you have a particularly strong run.
Key Terms and Conditions
- New customers only
- Minimum £20 deposit required
- Wager £20 on slots each day to unlock that day's 40 free spins (5 daily wagers in total, £100 combined)
- 200 free spins on Big Bass Bonanza at £0.10 each, credited at 40 per day for 5 days
- Free spin winnings paid as cash with no wagering requirements
- Maximum £250 from free spin winnings
- 18+ only • BeGambleAware.org
Always check SlotsKing's current terms and conditions directly on their site before claiming — offers can change.
18+ • New customers only • T&Cs apply • Please gamble responsibly