The doubled deposit is the market’s baseline

Every rung on the deposit-bonus ladder is measured against the shape this page covers. A 100% match is the plainest welcome offer in the book: the operator adds a second balance equal to the first, up to whatever ceiling the terms print, and the two halves behave differently from the moment they land. The first half is your own money, withdrawable whenever the cashier allows. The second half belongs to the offer until its conditions are met, and those conditions, not the doubling, decide what the promotion is actually worth.

Baseline status cuts both ways. Because the shape is so common it is also the best understood. On the licensed British market a matched first deposit commonly carries playthrough somewhere between 25x and 45x the bonus; offshore-facing terms run wider, between 30x and 50x, with caps on bonus winnings doing far more work there than in Britain, where several operators publish no win cap at all. Minimum deposits sit lower on the British side too, around £5 to £10 as the standard, while offshore cashiers tend to ask £10 to £20 equivalents and let crypto rails take less.

The doubling itself is simple arithmetic. Put in £50 and the offer adds £50 more, so £100 of funds sit in the account and the headline writes itself. What that £100 is actually worth is the subject of the rest of this page, because the second £50 arrives with strings attached and the strings carry a measurable price.

What 35x playthrough costs to clear

The multiplier is the first term to find and the first to price. Wagering at 35x the bonus means £1,750 of stakes must be placed on a £50 match before the bonus money and anything it has won move across to the withdrawable balance. Some terms apply the multiplier to deposit plus bonus together, which nearly doubles the turnover, so the exact wording matters more than the headline number.

Those stakes are not free. Every wager carries a house edge, and the edge drains the balance while the turnover builds. Across the game families the site keeps as reference points, online slots commonly run a 3% to 6% edge, European roulette sits at 2.7%, and blackjack under basic play lands somewhere between 0.5% and 2%. Blend those rates the way a mixed evening actually behaves and a working price near 1.5% per pound staked is fair; at that rate, clearing £1,750 of turnover costs about £26 in expectation.

Two levers move that cost more than any other. The eligible-games list and the weighting table decide which titles count toward the requirement and at what rate, so turnover built on the wrong games can amount to nothing. The maximum stake the terms allow while the bonus runs sets how fast the requirement can be met at all. Read both lines before opting in, because they decide whether the arithmetic in this section applies to you.

The calculator takes the same inputs and runs them on any figures you supply: deposit, match percentage, multiplier and cap.

Caps on what the bonus can pay

A cap is the ceiling the terms place on winnings from bonus play, and offshore-facing terms lean on it heavily: published caps in this part of the market typically run from £100 to £10,000, while several UK-facing operators print no win cap on bonus play at all. The range is wide because the cap is a cost-control lever, and where it sits decides how much of a good session survives conversion.

The cap only matters when results run large, but when it bites it bites completely. Take the £50 match again with a £250 ceiling on winnings: trimming starts at five times the bonus, which is roomy. A single hit worth £800 would pay £250 under that cap and surrender the remaining £550. At £100 or £200 ceilings the same hit keeps even less, and the expected value of the whole offer falls with every tightening.

Price the cap the way you price the multiplier: as a proportion of the bonus it governs. A ceiling at five times the match barely registers in the arithmetic further down this page; one at two times does, because large single outcomes can carry a disproportionate share of a volatile game’s return. When the cap and the playthrough are both tight, the headline is doing work the terms quietly take back.

The expiry clock and the pace it demands

Every matched offer runs on a clock. The terms state when it starts, usually when the deposit clears or the offer is activated, and what happens when it ends, and both lines deserve the same attention as the multiplier, because a bonus that lapses unfinished delivers nothing whatever its size.

The useful way to read the clock is as a pace requirement. Turnover of £1,750, the 35x figure on a £50 match, is £250 a day across a week, £125 a day across a fortnight or about £58 a day across a month. Whether that pace is comfortable depends on the stake size the terms allow and the sessions you would honestly play, and the arithmetic makes one thing plain: a short window and a heavy multiplier compound each other, which is why those two lines should be read together.

No page can hand you the exact window a given offer carries, because the terms set it and the terms differ from cashier to cashier. What the model can do is convert any window into a daily pace and let you judge, before the money moves, whether that pace fits how you actually play.

When the second half is worth having

The doubled deposit pays when the terms are light enough that the second half keeps most of its value, and the model puts numbers on that: around 20x the bonus, roughly seven tenths of the headline survives; around 50x, a quarter. Between those poles sit the offers most people meet, and the deciding variables are the ones already covered: multiplier, cap, window and the games you would play anyway.

That last variable does more work than it sounds like it should. If the eligible titles are games you would stake on regardless, the bonus adds funds to a plan you already had, and the strings cost little because they bind behaviour you were never going to change. If taking the offer pushes you toward higher stakes, unfamiliar titles or longer sessions than the budget intended, the strings have rewritten the plan, and the expected cost of the turnover is no longer the only price being paid.

There is also a simple case for declining. A reader who would rather keep the whole balance withdrawable, stake what they like on whichever titles they like and skip the small print entirely gives up little by opting out, because the deposit always played fine on its own. The offer is an add-on rather than a prerequisite, and treating it as optional is the cheapest way to keep its true price visible.

Against the heavier multipliers

The 100% shape earns its baseline status by pairing the market’s plainest headline with its lightest terms. As the multiplier climbs, the operator gives away more, and the conditions tighten to pay for it: playthrough tends to step up, caps tend to sit closer to the bonus, and clocks tend to demand a faster pace. The family this page belongs to runs from the doubled deposit through matches that add twice, three times and four times the money you put in, and every rung buys headline at the cost of terms.

The comparison table below sets the baseline against the wider market, mixing licensed British rows with offshore-facing ones so the two licence classes can be read side by side. Welcome offers print as category-typical ranges rather than quotes of any single promotion, and the wagering column shows where each class tends to sit. Read it for structure rather than for deals: the point is the shape of the market, the spread each class prints and the payout windows the main rails support.

Brand	Licence	Welcome offer range	Wagering	Min deposit	Payout window	Payment rails
NetBet	UKGC licence	up to £100 + 50 spins	35x bonus	£10	wallets within 24 hours; debit cards 1 to 3 days	Visa Debit, Mastercard, PayPal, Skrill
Mystake	Offshore licence — verify on register	up to £400 over the first deposits	35x to 45x bonus	£10 to £20	crypto 0 to 24 hours; bank transfer 1 to 5 days	Visa, Mastercard, Bitcoin, USDT
Goldenbet	Offshore licence — verify on register	up to £600 + 100 spins	40x bonus	£10 to £20	crypto inside 24 hours; e-wallets same day	Cards, Bitcoin, Litecoin, bank transfer
Genting Casino	UKGC licence	up to £150 + 20 spins	30x bonus	£10	open banking 0 to 2 working days; cards 1 to 3 days	Visa Debit, Mastercard, Trustly, PayPal
Kwiff	UKGC licence	£20 to £30 in free bets for a £10 start	40x winnings	£5 to £10	wallets 0 to 24 hours; cards 1 to 3 working days	Visa Debit, Mastercard, Apple Pay, Google Pay
bwin	UKGC licence	up to £50 in free bets on a £10 start	35x bonus	£10	e-wallets same day; debit cards 1 to 3 days	Visa Debit, Mastercard, PayPal, Apple Pay
Lottomart	UKGC licence	100% up to £75 + 50 spins	30x to 35x bonus	£10	open banking inside 2 days; wallets same day	Debit cards, Apple Pay, Google Pay, Trustly
Fabulous Bingo	UKGC licence	£40 of bingo bonus + 20 spins for £10	30x bonus	£5 to £10	PayPal within 24 hours; cards 1 to 3 days	Visa Debit, Mastercard, PayPal, Paysafecard
Slots Temple	Offshore licence — verify on register	up to £750 across early deposits	40x to 50x bonus	£10 to £20	crypto 0 to 24 hours including confirmations	Bitcoin, USDT, Litecoin, Visa
10bet	UKGC licence	a first-deposit match to £125	40x winnings	£10	Neteller within a day; debit cards 1 to 3 days	Visa Debit, Mastercard, PayPal, Neteller
Casumo	UKGC licence	up to £100 + 25 free spins	30x bonus	£10	e-wallets 0 to 24 hours; debit cards 1 to 3 working days	Visa Debit, Mastercard, PayPal, Skrill, Neteller

Figures are category-typical ranges compiled from operator-published terms at the time of writing, not quotes of any single promotion. UKGC rows are the British baseline, shown for comparison; they cannot be claimed at offshore operators.

A worked expected-value model

Here is the whole method on one deposit. Take £50, take the 100% match, so £50 of bonus sits on top, and take the playthrough at 35x. Turnover comes to £1,750, the blended edge prices every pound of it, and the difference between the bonus and that cost is what the second half can be expected to return. The result is a long-run average rather than a promise about any single session, and it exists so that offers with different multipliers, caps and windows can be weighed on one scale.

Read the chart as the shape of the trade and the table as its exact arithmetic. The model keeps seven tenths of the headline at 20x, just under half at 35x and a quarter at 50x, and the small gaps between the chart’s round figures and the table’s precise ones are the cost of drawing a curve in whole numbers.

Scenario	Turnover to clear (£)	Expected cost of play (£)	Expected value left (£)	Share of headline kept
20x on a £50 bonus	1,000	15.00	35.00	70%
35x on a £50 bonus	1,750	26.25	23.75	47.5%
50x on a £50 bonus	2,500	37.50	12.50	25%
35x on a £100 bonus	3,500	52.50	47.50	47.5%
35x on a £50 bonus, winnings capped at £100	1,750	26.25	about 22	44%

The model takes 35x the bonus as its centre, the figure offers at this end of the market usually cluster around, and it prices every pound staked at a blended 1.5% house edge drawn from the site’s game reference points. Expected value is the bonus minus the expected cost of meeting the turnover; money columns are pounds, and the final row shows a £100 ceiling shaving the largest results before they convert.

The calculator earlier on this page runs the same inputs on figures of your choosing, deposit, percentage, multiplier and cap, which is the quickest way to test whether a term sheet in front of you behaves like the baseline here or like something heavier.

The checklist before you take the match

Run the offer through six questions before committing anything; the exercise takes minutes and turns a headline into a price.

1. Find what the multiplier multiplies. Bonus-only at 35x is half the turnover of the same figure applied to deposit plus bonus.
2. Find the cap and divide it by the bonus. A ceiling below roughly twice the match will bite the expected value hard; five times or more barely registers.
3. Convert the expiry window into a daily pace by dividing the turnover by the days given, then test that pace against sessions you would honestly play.
4. Read the eligible-games list, the weighting table and the top stake permitted while the bonus is active, so progress actually counts.
5. Check the deposit rail before paying in. Some operators exclude particular wallets from bonus eligibility, and the rule is printed per cashier rather than assumed.
6. Decide whether the strings would change how you play. If they would, price that change honestly, or decline the offer and keep the balance whole.

Declining stays available throughout. On the licensed British market the deposit plays perfectly well without an add-on, and the offer exists to be taken only when its terms, run through the arithmetic on this page, still look like value to you.