LOW RISK
Expected Value
£15.48
Time Required
~20 mins
Deposit Needed
£20
Qualify Over
5 days

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How the Profit Tracker works: Once you've completed this offer, click "Log to Profit Tracker" to record your actual result. We'll track your running profit vs expected value so you can see how your results compare over time.
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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 Spins Schedule
Day Qualifying Wager Spins Unlocked
Day 1 Wager £20 40 spins
Day 2 Wager £20 40 spins
Day 3 Wager £20 40 spins
Day 4 Wager £20 40 spins
Day 5 Wager £20 40 spins
⚠️ Max £250 from free spin winnings

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
ℹ️ About this EV figure

£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

  1. Register at SlotsKing
    Create 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.
  2. Deposit £20 using a debit card
    Make 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.
  3. Each day: wager £20 on Secrets of Atlantis to unlock 40 spins
    Navigate 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.
  4. Play your 40 daily free spins on Big Bass Bonanza
    After 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.
  5. Repeat for each of the 5 days
    Log 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.
  6. Withdraw
    Once all 200 spins are played, withdraw your remaining deposit balance along with any free spin winnings. You are done.
✓ Winnings paid as cash

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

Key Terms and Conditions

Always check SlotsKing's current terms and conditions directly on their site before claiming — offers can change.

Claim This Offer at SlotsKing →

18+ • New customers only • T&Cs apply • Please gamble responsibly