Low Risk Casino Lingo

RTP is the percentage of total stakes a game pays back to players over a very large number of spins. A slot with 96% RTP returns £96 for every £100 wagered, on average. It's a mathematical property of the game, not a guarantee for any single session.

UK casinos are legally required to publish RTP figures for every game. You'll usually find them in the game's info panel (the "i" button). If you can't see one, check the developer's website. The RTP matters most when you're clearing wagering requirements: a higher RTP means you lose less of your bonus in the clearing process.

The house edge is the flip side of RTP. A game with 96% RTP has a 4% house edge. That 4% is what the casino keeps, in aggregate, across all bets placed on that game. A 2% house edge is much cheaper to clear wagering through than a 10% one.

When you're working out the true cost of clearing a bonus, house edge is the number to use. Multiply your total required wager by the house edge percentage and you get your expected clearing cost.

EV is the single most important number on this site. It tells you what you can expect to profit from an offer if you ran it many times over. A +£12 EV offer doesn't guarantee £12 on any given attempt — it means that across enough completions, £12 is the average outcome.

We show EV figures on every offer page because headline bonus size is misleading. A £100 bonus with 30x wagering can have lower EV than a £10 no-wager offer. EV cuts through the marketing noise and gives you something objective to act on.

Volatility is a property of the game itself. Slot developers rate each game as low, medium, or high volatility. A low-volatility slot pays out small amounts frequently. A high-volatility slot pays rarely, but in larger chunks when it does.

When clearing wagering requirements, the volatility of the game you choose affects your experience but not your long-run outcome. Higher volatility means you're more likely to either bust early or finish well ahead — but the expected clearing cost stays the same either way.

Variance is the broader concept: how widely your results spread around the expected value, both within a session and over time. You'll hear it used in two ways. In maths, it describes the statistical spread of outcomes around EV. In practice, it describes your run of results — "I had a high-variance month" means your results swung well above or below expectation.

Variance is why a +£12 EV offer can pay out £2 one time and £30 the next. The edge is real and consistent; the results aren't. The more offers you complete, the more your actual profit converges toward your cumulative EV. A bad run isn't evidence the strategy is broken — it's variance doing exactly what it should.

A welcome bonus is a one-time promotion for new customers at a casino. On this site, we use "sign-up offer" as the preferred term. These are the highest-EV opportunities available because casinos compete hard for new accounts, and you only have access to them once per brand.

A reload is a bonus for existing customers, usually tied to a deposit or offered on a recurring schedule. They typically have lower EV than sign-up offers, but they repeat — which means you can stack returns across the calendar if you manage them well.

Wagering requirements (sometimes called playthrough) are how many times you need to wager a bonus before you can withdraw it. A £20 bonus with 5x wagering means you need to place £100 in total bets before the funds unlock. The house edge on those bets is the real cost of clearing.

Lower wagering is better. Many risk-free offers on this site carry 0x wagering, meaning anything you win from the bonus is immediately withdrawable cash. Always check whether the wagering applies to the bonus amount only, or to bonus plus deposit combined — the latter is significantly more expensive.

Most sign-up offers require you to place a qualifying wager to trigger the bonus — usually a fixed stake on a specified game type, sometimes at minimum odds if the casino has a sportsbook. The cost of this wager (the expected house edge on that bet) is factored into the EV figure we show on offer pages, so you don't need to account for it separately.

A non-sticky bonus (also called cash-first) keeps your deposit and bonus funds separate. You can withdraw your deposit independently, before your bonus funds are ever at risk. This is the safest structure and what most risk-free offers on this site use.

A sticky bonus is mixed into your balance from the start. You can't isolate your deposit from the bonus. This matters if you hit a large win partway through — the winnings are still tied to a wagering requirement you haven't cleared. When we say "risk-free," that almost always means non-sticky.

Most bonus T&Cs cap the stake you can place per spin while wagering is active — typically £5, but sometimes lower. Exceeding this limit while clearing a bonus can void your winnings entirely, even if you've met the wagering threshold. We flag any unusual max bet restrictions on individual offer pages.

Free spins are pre-loaded spins on a specific slot, usually at a fixed value per spin (commonly £0.10 or £0.20). Their EV depends on the RTP of the assigned game and whether the winnings carry any wagering requirement. For example, 50 x £0.10 spins at 0x wagering on a 96% RTP slot is worth roughly £4.80 in EV before variance. Free spins with 0x wagering are the cleanest bonus structure there is.

A risk-free offer is one where you can't meaningfully lose your own deposit. The most common structure is a bonus bet or free spins that trigger regardless of whether your qualifying bet wins or loses, with winnings subject to low or zero wagering. Your downside is near-zero; your upside is the EV of the bonus.

These are the best starting point if you're new to offer completion. There's no meaningful downside to speak of, just real variance in how much you actually take out.

Low-risk offers carry a small but real chance of losing a bit of your own money. This usually comes from a slightly higher wagering requirement or a qualifying bet structure where the deposit is briefly at risk. The EV is still clearly positive — you're just accepting a small downside in exchange for a larger expected return.

Medium-risk offers are typically deposit-match bonuses with higher wagering (around 10x or more), or structures where your own cash is wagered through the bonus before you can withdraw. The expected returns are often higher to compensate, but so is the variance. These need more careful bankroll management and are better tackled once you're comfortable with the lower tiers.

Gubbing is when a casino restricts your account — most commonly by removing your access to bonus promotions. Signs include being excluded from offers you'd previously received, free spin amounts suddenly dropping, or being asked to meet a high wagering threshold before any promotion unlocks.

It's a normal part of advantage play over time. Casinos do this to accounts they identify as consistently offer-savvy. The standard approach is to avoid playing exclusively during bonus periods, play the occasional small stake session outside of promotions, and check individual offer pages for any casino-specific notes on restriction risk.

The T&Cs are the specific rules attached to a bonus. Two casinos offering the same headline number can have very different EV depending on their T&Cs. The key things to check every time: wagering requirement, max bet per spin, eligible games, time limit to clear, and whether the bonus is sticky or non-sticky. We summarise the material T&Cs on every offer page so you don't have to dig through the fine print.

An advantage player (or AP) is someone who approaches casino offers from an expected value standpoint rather than for entertainment. On this site, we use the term neutrally — it just means doing the maths before you deposit and only playing when the numbers are in your favour.