50% slots bonus guide

How a 50% slots bonus works

Divide your deposit by two and you have the bonus. That's the whole calculation for a 50% slots bonus until you reach the cap. Pay in £20 and £10 of bonus funds appear next to your £20 of cash; pay in £100 and you get £50. The bonus is locked until you complete the wagering requirement, which is set as a multiple of the bonus.

Half-matches look less generous than a 100% deal, and on a small deposit they are. Their appeal is the cap. A 50% offer with a high ceiling can hand you more bonus money in pounds than a 100% offer with a low one, which is exactly the situation with the two match bonuses among our partners. Our explainer on matched deposits covers the general idea; here we stick to the numbers.

Casumo's 50% match: what the terms say

Casumo is run by Recro Limited under UKGC account 61549. Its welcome bonus for new customers aged 18 and over is a 50% match up to £100 on the first deposit, and the published terms add five conditions worth knowing before you pay in.

• Opt-in required: the bonus isn't automatic; you have to choose it.
• Minimum deposit £20: Casumo's general minimum is £10, but £10 doesn't qualify for the bonus.
• 10x wagering on the bonus: a £100 bonus needs £1,000 of qualifying stakes.
• 7 days to wager: the terms set exactly when the week starts.
• £5 maximum bet: applies while a bonus is active, alongside game, play and payment restrictions.

The terms don't publish a list of excluded payment methods in our facts, so read the bonus terms on the deposit screen. More on the account side is on our Casumo welcome offer page.

The 50% slots bonus at every deposit level

The final column is the average amount the house edge takes from your wagering on a slot paying 96%, calculated as 4% of the wagering total. On every row the bonus is worth more than that average cost, which is the effect of the 10x cap. But averages hide the swings: on a high-volatility slot, plenty of players lose the full balance before wagering ends.

There's no extra bonus beyond a £200 deposit. Depositing £300 only makes sense if you'd have deposited £300 anyway.

When a 50% bonus beats a 100% bonus

Put Casumo's 50% up to £100 next to 10bet's 100% up to £25 and you get a clean crossover at £50. Below it, 10bet's match gives more. Above it, Casumo's does. Here's the comparison, with each casino's own wagering window.

Time matters too. 10bet asks for 10x within 3 days and slots only; Casumo allows 7 days. A larger bonus also means more wagering: £1,000 at Casumo against £250 at 10bet. If you're comparing in depth, see our Casumo vs 10bet comparison and the dedicated page on the 100% slots bonus.

The £5 max bet and UK stake limits

Casumo's £5 maximum bet with an active bonus matches the legal limit for players aged 25 and over. Players aged 18–24 are capped at £2 per spin by law regardless, so for them the bonus rule never comes into play.

Breaching a bonus max bet can lead to bonus winnings being removed, so it's worth knowing where your stake setting sits before the first spin. On a 20-payline slot such as The Dog House, the figure shown is normally the total stake per spin, but check the total bet in the game's settings rather than the coin value.

Fitting £1,000 of wagering into 7 days

A full £100 bonus requires £1,000 of stakes in a week. With the 2.5-second minimum spin time on UK slots and no autoplay, it helps to think in sessions rather than one long sitting.

If even the shortest of those feels like more slots than you'd normally play in a week, a smaller deposit with a smaller bonus is the more comfortable choice. Our guide to slot session length helps with planning, and how to track wagering shows how to keep count.

Choosing slots to clear a 50% bonus

The RTP of the slot you choose drives the average cost of wagering. A 96.5% game costs about £35 on average to turn over £1,000; a 94% game costs about £60. Casumo's game and play restrictions may also exclude some titles from bonus play, so check the terms before settling on one.

Medium-volatility games tend to keep a balance alive longer while wagering. Wolf Gold is listed at 96.01% RTP with medium volatility; Big Bass Bonanza sits at 96.71% but is high volatility. Our guide to finding a slot's RTP shows where the live figure appears in the game.

How to claim Casumo's 50% slots bonus

1. Read Casumo's welcome bonus terms, including the game, play and payment restrictions.
2. Register a new account; you must be 18 or over and in the UK.
3. Set a deposit limit before the first deposit.
4. Opt in to the welcome bonus as the terms describe and deposit at least £20.
5. Check the bonus shows on your balance: 50% of the deposit, up to £100.
6. Play eligible slots at £5 a spin or less (£2 if you're 18–24).
7. Complete 10x the bonus within 7 days, then withdraw if you choose.

Casumo's site lists card withdrawals at up to 2 days and bank at up to 5, with PayPal and several e-wallets paid instantly after approval. A £3 fee applies to withdrawals under £10. See our Casumo withdrawal time page for the full picture.

Where to claim a 50% slots bonus

Casumo is the direct match: 50% up to £100 on a first deposit of £20 or more, 10x wagering within 7 days, £5 max bet, opt-in required, 18+ and terms apply. 10bet's 100% match suits deposits below £50, and Coral's 100 spins suit players who want no wagering.

18+. Gambling should be entertainment that costs money, not a way to make it. Set a deposit limit before you play: how to set limits. Free, confidential help: National Gambling Helpline 0808 8020 133.