What a Bonus Buy Actually Costs
Bonus buy slots let you skip the base game and purchase direct entry into the free spins round. The price is fixed by the game’s mathematics, not by the casino, and typically sits between 60x and 100x your total stake. On a 20p spin, that means a buy-in of roughly £12 to £20; on a £1 stake, expect to part with £60 to £100 in a single click. Read more about this at 150freespins.uk/counted-at-the-door/150-free-spins-no-deposit/.
The figure isn’t arbitrary. Providers calculate the exact expected value of the feature and add a premium , usually between 1% and 3% , as payment for convenience. A slot with a 96.5% base return to player might offer its bonus at 96.2%, so you are trading a sliver of value for certainty of entry.
Some titles now offer multiple tiers. Pragmatic Play’s Sweet Bonanza sells its free spins at 100x, while its Gates of Olympus equivalent sits at the same level. Others, such as Money Train series games, price features from around 60x for a standard round up to 500x or more for the maximum-volatility version.
The Maths Behind the Decision
Every bonus buy has a stated RTP, and in the UK it must be displayed clearly under Gambling Commission rules. The critical point is that this RTP is calculated per purchase, not per spin. If a feature is listed at 96%, you can expect to lose 4p in every £1 spent on buys over the long run , the same theoretical edge the house holds on ordinary spins.
What changes is variance. A bought feature usually delivers one of three outcomes: a modest return below your purchase price, a break-even result, or a large multiplier. On many high-volatility titles, roughly 60% to 70% of purchases return less than the buy-in cost, meaning you need patience and a bankroll that can absorb repeated losses.
Here is how typical price points compare:
| Stake | Buy Price (100x) | Cost per Purchase |
|---|---|---|
| 10p | 100x | £10 |
| 50p | 100x | £50 |
| £1 | 100x | £100 |
| £2 | 100x | £200 |
When Buying Makes Sense , and When It Doesn’t
Bonus buys suit players who value time efficiency. A free spins round that might take 300 spins to trigger naturally can be reached instantly. For anyone playing briefly on a mobile device, that convenience has real appeal, and the premium paid is modest relative to the entertainment gained.
They suit fewer players when budgets are tight. Because a single purchase can equal 100 standard spins, your session money disappears far faster. Setting a strict cap , for example, no more than two buys per session, or a maximum of £20 in total , keeps the mechanic from eating a bankroll in minutes.
Before buying, check three things: the feature’s stated RTP, the maximum win cap, and whether the buy option is even available at your chosen stake. Some operators disable purchases below certain bet levels, and a few UK-licensed casinos restrict bonus buys entirely as part of safer gambling policy. Always confirm the terms on the game’s information screen, and treat the buy button as a high-stakes spin rather than a shortcut to guaranteed profit.