A 300% deposit bonus, costed before it is claimed

The phrase sounds like arithmetic done in your favour: hand over one part, receive three more. On a £20 deposit the match credits £60 of bonus funds beside your own money, and the till moment feels like the cheapest £80 of casino credit on the market. The honest costing starts one line later, in the wagering terms, where the same offer asks fifty times the bonus before anything withdraws. Fifty times £60 is £3,000 of required play, one hundred and fifty times the deposit that triggered it. That ratio, not the treble, is the offer’s real shape, and this page measures it the way every structure on this site is measured: deposit, match, multiple, base, cap, weights, expiry, with each assumption printed beside the arithmetic it produces.

Two markets print matches of this weight, and they live under different laws. Providing facilities for gambling in Great Britain without an operating licence from the Gambling Commission is an offence under section 33 of the Gambling Act 2005, and inviting or advertising gambling prohibited by the Act is a separate offence under section 327; both offences sit with operators and advertisers, and an individual player commits neither. The Commission keeps a public register of every licensee it has approved, searchable in seconds, which makes the boundary between the tiers checkable rather than arguable. Casinos licensed in Britain rarely print a treble: their welcome structures cluster around a 100 percent match or a modest bundle. The 300% deposit bonus lives almost entirely offshore, and the licence section below prices what that address costs a British player.

The model behind every figure on this page takes six inputs and hides none of them. The deposit is the sum that triggers the match. The match is the percentage the till credits. The multiple is the turnover demand, and the base is what it bites on: the bonus alone or the combined pot. The cap is the ceiling on what the bonus converts into once wagering finishes. The weights decide which games count towards the demand, and the expiry decides how many days the project has to fit inside. Where the market offers a range, the value chosen is stated as an assumption on the page, so a reader who disagrees can change the number and watch the answer move with it.

The table below runs the featured structure and its near neighbours through that model. Expected cost is priced at a blended 3 percent house edge across a slots-led session, a fair middle for the games these terms usually point towards. The deposit is treated as consumed during play, because that is what play does to it. Caps are category-typical conversion ceilings, not promises. Read the net column before the match column: it is the only one that has already paid for the play.

Two rows carry the argument. The featured structure, £20 in and £60 credited at fifty times on the bonus, demands £3,000 of play and returns an expected net of minus £30 once that play is priced. The row beneath it holds everything constant except the multiple: at thirty times the demand falls to £1,800 and the net turns six pounds positive. Same deposit, same treble, same cap; only the multiple moved, and the offer swung from a losing proposition to a marginal one. That is the case for reading the wagering line before admiring the headline. The size of the match is marketing; the size of the turnover is the price; and the multiple is where the two are set against each other.

From £20 at the till to £3,000 of required play

Walk the featured offer line by line, because each line does one job. You deposit £20. The till credits 300 percent of it, so £60 of bonus funds lands beside your deposit and the combined pot reads £80. The terms set the wagering requirement at fifty times the bonus amount, which leaves your own deposit outside the count. The demand is therefore fifty times £60: £3,000 of stakes before the bonus and anything won from it becomes withdrawable. Every stake counts once towards the total, progress cannot be banked, and a withdrawal request made early usually forfeits the bonus and the progress with it. The ratio to carry away is stark: fifty pounds of required play for every pound the bonus grants.

The base deserves the same attention as the number in front of the x. Fifty times on the £60 bonus is £3,000. Fifty times on the £80 pot of bonus plus deposit is £4,000. The same digit, printed in the same advert, produces two different bills, and the whole difference sits in the base. Terms sheets state the base somewhere near the wagering paragraph; adverts almost never do. Where a promotion leaves the base unstated, assume the heavier reading until the terms prove otherwise, because assuming the lighter one is how a reader arrives at a bill a third larger than the one budgeted. Every row of the table above names its base, and the calculator below follows the same rule.

The featured multiple is an assumption, stated as one: the arithmetic below takes fifty times, since fifty times is the multiple this class of terms most often prints on percentage matches of this weight. Lighter packages ask thirty, and the heavy end of the offshore market asks sixty and occasionally more. Run the lighter band for contrast: the arithmetic below takes thirty times, since thirty times is the asking rate mid-weight packages still print, and on the same £60 bonus the demand falls from £3,000 to £1,800, close enough to flip the expected net from minus £30 to plus £6. One line in the terms, one number in the model, and the offer changes character entirely.

The calculator prices the structure directly. It takes a deposit, a match percentage, a wagering multiple and a conversion cap, and it returns the turnover demand with the expected cost of meeting it. The prefill carries the featured model: a £20 deposit, matched at 300 percent, wagered at fifty times on the bonus, with the cap set at £60. Two standing assumptions sit behind the tool. The multiple bites on the bonus alone unless you decide otherwise, and the deposit is treated as consumed during the play that clears the requirement. Change any input and the tool re-prices the offer without ceremony.

A note on what the tool returns and what it refuses to do. It computes the turnover demand, the cap’s effect and the expected cost of the required play at the blended edge you set; it does not predict an evening, forecast a withdrawal or imply that a losing run is owed a correction. At a 3 percent blended edge, clearing £3,000 of slots play costs about £90 in expectation against a £60 bonus, an expected net of minus £30. That figure is the offer’s honest price. Individual sessions land above and below it without any memory of each other, which is why the expected value is a floor on the average cost of the entertainment rather than a forecast of a night.

Three readings of one treble: nominal, capped, wagered

One offer, three honest readings, and the gap between them is the whole story of the treble. Read nominally, the bonus is worth £60, three times the money that triggered it. Read at the cap, it is still £60, because the assumed conversion ceiling equals the match and anything the session builds beyond the ceiling is commonly forfeit. Read as wagering, the same offer is £3,000 of required play, fifty times everything the nominal reading celebrates. The chart below puts the three readings on one axis, and the shape of the picture is the argument: the wagering bar does not tower over the bonus bars, it removes them from the scale altogether.

The proportions deserve a moment, because the drawing flatters the small bars by giving them pixels at all. In cash terms the offer demands £50 of play for every £1 of bonus it grants. Set the same multiple against the market’s standard 100 percent match on the same £20 and the demand is £1,000; the treble triples the headline and triples the bill, adding £40 of bonus and £2,000 of play in the same motion. The percentage in the advert multiplies the price as surely as it multiplies the gift, and the two multiplications never travel separately. A reader who would not accept a £3,000 bill should not accept the treble that carries it.

The cap is the quiet line in these terms, and on a strong session it is the expensive one. Conversion ceilings are commonly set at or near the match itself, as the model assumes here, so a run that builds £140 of playable balance from the £60 bonus can still release only £60 when wagering completes, with the excess removed from the account. On a weak session the cap never binds and the expected cost of the play dominates instead. Either way the arithmetic lands below the headline: the cap limits the upside, the multiple fixes the price, and neither figure appears in the advert. Both appear, printed and priced, in every row of the tables on this page.

The market’s match ladder and where a treble sits on it

A treble does not arrive alone; it sits on a ladder the offshore market prints in whole steps. The singles start at 100 percent and the ladder climbs through doubles and trebles to matches of 400 and 500 percent, each step adding zeros to the turnover long before it adds real value. The table below gathers a slice of both markets onto one page, the licensed British baseline beside offshore-facing rows, with licence labels, category-typical welcome bands, wagering ranges, minimum deposits, payout windows and payment rails. Ranges describe categories rather than promise anything about a particular till, and the licence column outranks the rest of every row it heads.

Figures are category-typical ranges compiled from operator-published terms at the time of writing. They are not quotes of any single promotion. UKGC rows are the British baseline, shown for comparison; none of them are claimable at offshore offers.

Read the rows against the subject of this page and a pattern holds. The British baseline rows print bundles and bingo bonuses, and the bingo-led multiples of two to four times are the kindest arithmetic on the page by a distance. The offshore-facing rows are the only ones printing percentages that reach 300 and beyond, and their wagering travels with them: thirty to sixty times is the common band, and the heaviest headline carries the heaviest multiple. The note beneath the table states the consequence plainly; the UKGC rows are the baseline for comparison, and none of them can be claimed at an offshore till.

A working order for reading any row, here or elsewhere: licence first, because it decides what recourse exists; multiple and base second, because they fix the bill; cap and weights third, because they fix what the bill can return; minimum deposit and rails fourth, because they decide whether the offer is fundable on terms you accept. Payout windows last, with the caution that a fast window without a complaints route is a different promise from a slower one with a regulator behind it. Run any welcome offer through that order and the treble’s place on the ladder becomes a measurement rather than a mood.

Terms that decide the bill: weights, expiry, caps and rails

Game weights decide which play actually counts, and they decide it brutally. Slots almost always count at 100 percent. Roulette and blackjack often count at 10 or 20 percent, and some live tables count for nothing at all. Clear a £3,000 requirement on a game weighted at 10 percent and the bets you must actually place reach £30,000. That is why every realistic route through a treble is slots-led, and why the blended edge of the games you would actually play matters more than the percentage on the match. The weights are printed in the terms; they are just never summarised anywhere a reader would naturally look.

Expiry sets the calendar the project must fit. These terms commonly allow somewhere between seven and thirty days from the deposit, after which unused bonus funds and unfinished progress are removed. The span converts the turnover into a daily quota, and the quota is what actually decides whether the offer is clearable by a person with a job and a week. £3,000 across thirty days is £100 of play a day. The same demand across seven days is over £400 a day, every day, with no day off. A reader can test that quota against their own week before depositing, which is the cheapest check on this page.

Two further terms catch readers out. The first is a maximum stake while bonus funds are active, commonly a few pounds, with breaches used to void winnings; the limit sits in the terms and bites precisely when a session is going well. The second is the eligible-rails list: some tills exclude particular e-wallets from welcome offers, so a deposit made through a convenient route can disqualify the package after the fact. Both rules are printed once, in the terms, and neither is negotiable after the deposit. Checking them takes minutes; discovering them costs the package.

The rails themselves differ by tier. Offshore tills lean on crypto and e-wallets such as MuchBetter, while British-licensed tills cluster around debit cards, PayPal and bank transfer; which services a given operator accepts varies and changes over time, so everything here is category-typical rather than a promise. Credit cards may still appear at tills with no UK licence, and their presence is itself a fact worth weighing, since the British ban exists because borrowing to gamble behaves differently from spending it. Currency conversion is part of the bill too: a till that charges in euros taxes a pound deposit on the way in and the withdrawal on the way out.

The lock on your own money completes the frame. These structures commonly hold the deposit and the bonus together until the multiple is met, so the £20 that triggered the treble sits locked for the length of the project, exposed to the same variance as the bonus it attracted. An early withdrawal request usually forfeits the bonus and the progress both. Lock-in is a cost without a line in the advert, and it lands on the deposit rather than the gift, which is the last reason the till moment flatters the offer.