Free spins and free bets get marketed with the same breathless energy, as if they were interchangeable gifts. They are not. One is a cash-convertible wager with a fairly predictable return; the other is a lottery ticket dressed up as a bonus. If you want to know which is worth more, you need two numbers, not one: expected value and median value. Most offer pages give you neither.
What a free bet is actually worth in cash
Start with the simpler product. A free bet is a stake the bookmaker funds. You place it, and if it wins you keep the winnings minus the stake, because the stake is not returned. That single rule is what makes a “£5 free bet” worth roughly £2.50 to £4.50 rather than £5.
The conversion depends on the odds you take. At evens, a £5 free bet wins £5 and you keep the lot, so the cash value sits near the top of that range. At 5.0, the same bet returns £20 profit but only lands one time in five, and the stake-not-returned structure shaves the edge. The practical rule most matched bettors use is 50% to 90% of face value, and the upper end requires shopping for tight markets and avoiding anything with a big overround.
Take the Puntit welcome offer as a worked example. Puntit offers £20 in free bets for a £10 qualifying bet, and pays the reward as four £5 free bets. The qualifying £10 wager requires minimum odds of evens (2.0 decimal), so your own stake has to go on something competitive rather than a 1.05 banker. If each £5 free bet converts at 70%, the four together are worth about £14 in expected cash. That is a real, calculable number before you place a single bet.
The mechanics matter too. The Puntit welcome offer requires opting in through the cashier screen, and a cashed-out bet voids the Puntit bonus. So if you back something, see it drifting, and take the cash-out, you lose the free bets. Read the terms before you get clever. Also note what Puntit does not offer: a no deposit bonus. Any page promising a Puntit promo code for free money without a deposit is inventing it.
Why 100 free spins are not the same as £10 cash
Now the harder one. “100 free spins” sounds like a round £10 if the spin value is £0.10. It is not. The spins carry a fixed bet size, a slot with a house edge, and almost always a wagering requirement on any winnings. Your expected value might land at £3 to £5 on a high-volatility slot, but your median outcome is close to zero.
That divergence is the whole story. Expected value is the average across millions of players, dragged upward by the rare player who hits a 5,000x win. Median value is what the middle player actually experiences, and on high-volatility games the middle player busts. Picture 100 people taking the same 100 spins. Perhaps 60 of them win nothing at all, 30 win a few pounds that get eaten by wagering, and a handful hit something worth withdrawing. The average looks respectable; the typical result does not.
Volatility, wagering and the fine print that changes the maths
Volatility is the lever. The same 100 spins at £0.10 on a low-volatility slot might return £4 to £6 with a tight spread, and a fair share of players will actually see it. Move to a high-volatility title and the expected value can sit in a similar band while the median collapses toward zero. The offer headline does not tell you which you are getting.
Then there is wagering. A 35x requirement on £5 of spin winnings means £175 of play before withdrawal, which on a 96% RTP slot costs you about £7 in expected losses. Suddenly your £5 expected value is negative in practice. Some offers throw in 100 free spins alongside a deposit match, and the Puntit casino side of the site, which you can explore at https://puntit-casino-online.uk/bonus/, runs its own promotions, but the arithmetic is the same: check the wagering multiplier before you value the spins at anything.
There is a related trap with cashback. Puntit provides 10% weekly cashback on net losses, which softens a bad run but does not turn spins into a positive-expectation play. Treat it as a cushion, not a subsidy.
Reading an offer page without being fooled
The practical fix is to demand both numbers. For a free bet, ask what the cash conversion is at the odds you will actually take, and check whether the qualifying wager is realistic. For spins, ask what the spin value is, what the wagering requirement is, and what volatility the eligible slots run at. If a page gives you only the headline figure, it is selling, not informing.
Compare the two products on that basis. A £10 free bet at 70% conversion is worth about £7 in expected cash with a reasonably tight spread around it. A hundred £0.10 spins might show £4 of expected value with a median of zero. The free bet wins on both metrics, and it wins by a wider margin on the one that matters to a single player: the median.
There are exceptions. A low-volatility spins offer with a 10x wagering requirement and no cap on winnings can be genuinely competitive, and if you enjoy slots anyway the entertainment value is real. But do not let a “100 free spins” banner convince you it beats a straightforward bet £10 get £20 free bets structure. The numbers rarely support it.
One more thing worth checking: the operator’s credentials. Puntit holds a UKGC account, which means the terms are enforced and complaints have somewhere to go. That does not make the maths better, but it makes the offer honest. Payment methods are standard fare, with Visa, Mastercard, Apple Pay, Google Pay and PayPal all available, and the minimum deposit is low enough that you can test the water without committing much.
If you want the short version: value every offer in cash, not in headline units. Work out the expected value and the median before you opt in, and weight the median more heavily if you are only going to claim the offer once. Take the free bet conversion at realistic odds, discount spins for wagering and volatility, and ignore any Puntit no deposit bonus claim you see on affiliate sites, because it does not exist. If you want updates on the genuine promotions, the Puntit_UK account on X (Twitter) is a more reliable source than a promo code page. Then place your qualifying bet at evens or better, keep it simple, and do not cash out.