Modern slots often give you a choice: Grind the base game hoping for 3+ Scatters, or Pay 80x-400x your bet to trigger the bonus immediately.
Which option is smarter? This Spin vs Buy Calculator compares the upfront cost of buying against the estimated “opportunity cost” of spinning naturally — factoring in base game returns, time investment, and your specific slot’s statistics.
🎰 Spin vs Buy Bonus Calculator
Compare the true cost of spinning vs buying the feature
How the Bonus Buy Feature Works
The Bonus Buy (also called “Feature Buy” or “Buy Feature”) lets you skip the base game entirely and jump straight into free spins by paying a fixed multiple of your bet — typically 80x to 400x depending on the slot and feature tier.
One fixed price (usually 100x) for the main free spins feature. Examples: Sweet Bonanza, Gates of Olympus, Book of Dead.
Multiple price options for different features or volatility levels. Examples: Wanted Dead or Wild (80x/200x/400x), Mental (80x-1000x).
Pay 25% extra per spin to double trigger chance. Not instant, but faster than regular play. Available in Gates of Olympus, Sweet Bonanza.
Popular Slots Bonus Buy Costs
Here’s a quick reference for the most popular bonus buy slots. Use these values in the calculator above, or compare costs at a glance:
| Slot | Provider | Buy Cost | RTP | Trigger Freq | Max Win |
|---|---|---|---|---|---|
| 🍬 Sweet Bonanza | Pragmatic Play | 100x | 96.48% | ~1 in 150 | 21,100x |
| ⚡ Gates of Olympus | Pragmatic Play | 100x | 96.50% | ~1 in 180 | 5,000x |
| 🤠 Wanted Dead or Wild | Hacksaw Gaming | 80x / 200x / 400x | 96.38% | Varies by tier | 12,500x |
| 🧠 Mental | Nolimit City | 80x – 1000x | 96.08% | ~1 in 200+ | 66,666x |
| 📖 Book of Dead | Play’n GO | 100x | 96.21% | ~1 in 150 | 5,000x |
| 🐕 Dog House Megaways | Pragmatic Play | 100x | 96.55% | ~1 in 160 | 12,305x |
| 🎣 Big Bass Bonanza | Pragmatic Play | 100x | 96.71% | ~1 in 170 | 2,100x |
| 🍭 Sugar Rush | Pragmatic Play | 100x | 96.50% | ~1 in 165 | 5,000x |
| ✋ Hand of Anubis | Hacksaw Gaming | 129x / 200x | 96.24% | Varies | 10,000x |
| 🐃 Big Bamboo | Push Gaming | 99x – 608x | 96.13% | Varies | 50,000x |
The Spin vs Buy Formula
To calculate whether spinning or buying is cheaper, you need to account for the opportunity cost — the base game returns you receive while spinning toward the bonus.
📐 The Formula
Net Cost of Buying = Buy Multiplier × Bet Size
Verdict: Choose whichever cost is lower
Example: Gates of Olympus ($1 Bet)
🎰 Option A: Spinning
- Trigger frequency: 1 in 180 spins
- Total wagered: 180 × $1 = $180
- Base game RTP: ~50% (of total 96.5%)
- Expected return: $180 × 0.50 = $90
- Net cost: $180 − $90 = $90
- Time: ~9 minutes (3 sec/spin)
💰 Option B: Buying (100x)
- Buy cost: 100 × $1 = $100
- Bonus received: Instant
- Base game returns: $0 (skipped)
- Net cost: $100
- Time: Instant
Ante Bet: The Middle Ground
Some slots offer an Ante Bet option — a compromise between spinning and buying. You pay 25% extra per spin, and the chance of triggering the bonus doubles.
Ante Bet Math: Gates of Olympus
| Option | Cost per Spin | Trigger Freq | Total Wagered | Net Cost | Time |
|---|---|---|---|---|---|
| 🎰 Normal Spin | $1.00 | 1 in 180 | $180 | ~$90 | ~9 min |
| ⚡ Ante Bet (+25%) | $1.25 | 1 in 90 | $112.50 | ~$56 | ~4.5 min |
| 💰 Buy Bonus (100x) | $100 | Instant | $100 | $100 | Instant |
Key insight: Ante Bet can be the cheapest option when accounting for opportunity cost, while still cutting wait time in half. Available in Gates of Olympus, Sweet Bonanza, Sugar Rush, and other Pragmatic Play slots.
Tiered Bonus Buy Slots
Some slots offer multiple bonus buy tiers, each giving access to a different feature with varying volatility and win potential:
🤠 Wanted Dead or Wild (Hacksaw Gaming)
| Feature | Buy Cost | RTP | Volatility | Description |
|---|---|---|---|---|
| 🚂 Great Train Robbery | 80x | 96.27% | Medium | 10 free spins with sticky wilds |
| ⚔️ Duel at Dawn | 200x | 96.33% | High | 10 free spins with frequent VS symbols (2x-100x multipliers) |
| 💀 Dead Man’s Hand | 400x | 96.40% | Extreme | Two-phase bonus: collect wilds/multipliers, then showdown |
🧠 Mental (Nolimit City)
Mental offers an extreme range of buy options from 80x to 1000x, each unlocking progressively more powerful features. The highest tier guarantees access to the “Mental” feature with xSplit wilds and maximum win potential of 66,666x.
When to Buy vs When to Spin
✅ Buy the Bonus When:
- Time is limited (lunch break, streaming)
- You want to skip base game variance
- Bonus RTP is higher than base game
- You’ve hit many dead spins and need action
- Slot has tiered buys with cheap options
- You’re a content creator needing highlights
❌ Spin for the Bonus When:
- You have time and patience
- Base game has good features (wilds, multipliers)
- Your bankroll is limited
- You’re clearing a casino bonus (buy may be excluded!)
- Ante Bet option is available (cheaper alternative)
- You enjoy the full slot experience
⚠️ Bonus Buy & Casino Bonuses Warning
🚨 Read Before Playing with Bonus Money
Most online casinos have strict rules about using bonus buy features while wagering a casino bonus:
- Excluded entirely: Many casinos don’t count bonus buy toward wagering requirements
- Reduced contribution: Some count it at 10-20% instead of 100%
- Terms violation: Using bonus buy may forfeit your bonus AND winnings
- Always check T&Cs before buying features with active bonuses
Need to calculate your wagering requirements? Use our Casino Bonus Wagering Calculator to see the real cost of your bonus.
Bonus Buy Restrictions by Region
🇬🇧 United Kingdom: Since April 2019, the UK Gambling Commission has banned the bonus buy feature for UK players. This was implemented as a responsible gambling measure to prevent players from rapidly depleting their bankroll. UK players must trigger bonuses naturally through gameplay.
🌍 Other regions: Bonus buy is available in most other jurisdictions, though individual casinos may have additional restrictions. Always verify availability on your chosen platform.
Related Calculators
For more detailed slot analysis, check out these complementary tools:
- Slot Bonus Buy EV Calculator — Calculate the expected value of specific bonus rounds
- Casino Bonus Wagering Calculator — See the true cost of wagering requirements
- Slot Volatility & Hit Frequency Visualizer — Understand variance profiles
- Slot RTP Simulator — Simulate thousands of spins