Deposit + Bonus vs Bonus Only: The Three Words That Double Your Wagering
Two offers can both advertise a 10x wagering requirement and demand completely different amounts of turnover. The multiplier is only half the sum; the other half is what it multiplies. This guide works out what the basis is worth in pounds, and shows the point at which an offer stops being worth taking at all.
The short answer. On a 100% match, a requirement calculated on deposit plus bonus is exactly twice the turnover of the same requirement calculated on the bonus alone — a stated 10x that behaves like 20x on the bonus. The effect gets worse as the match percentage falls, not better: at a 50% match the same 10x behaves like 30x. On typical 4% slots, a deposit-plus-bonus 10x offer is worth nothing at a 66.7% match and is negative below it.
The basis is the multiplicand, and it is rarely in the headline
A wagering requirement has three moving parts: the multiplier, the basis it is applied to, and the rate at which each game counts towards it. Marketing pages quote the first. Terms and conditions carry the second, usually as a short phrase — “10x the bonus amount”, “10x deposit + bonus”, or occasionally “10x your deposit” — and the third sits in a table further down, which we cover in game contribution to wagering.
Converting a deposit-plus-bonus requirement into the language everyone actually thinks in — multiples of the bonus — takes one line of arithmetic:
Effective multiple on the bonus = multiplier × (1 + deposit ÷ bonus)
100% match: 10 × (1 + 100 ÷ 100) = 20x
50% match: 10 × (1 + 200 ÷ 100) = 30x
The counter-intuitive part: a smaller match is harsher
Instinct says a 200% match is generous and a 25% match is mean, and on the size of the bonus that is right. On a deposit-plus-bonus basis it also works the other way round, because a smaller match means a larger deposit sitting inside the multiplicand. The generosity of the headline and the harshness of the basis pull in opposite directions, and the second effect is the larger of the two.
Every row below is a £100 bonus with a stated 10x requirement on deposit plus bonus, cleared on slots at 100% contribution with a 4% house edge. Expected cost is turnover multiplied by house edge.
| Match | Deposit needed | Basis | Turnover at 10x | Expected cost | Net vs £100 bonus | Behaves like |
|---|---|---|---|---|---|---|
| 200% | £50 | £150 | £1,500 | £60 | +£40 | 15x |
| 150% | £66.67 | £166.67 | £1,667 | £66.67 | +£33.33 | 16.7x |
| 100% | £100 | £200 | £2,000 | £80 | +£20 | 20x |
| 75% | £133.33 | £233.33 | £2,333 | £93.33 | +£6.67 | 23.3x |
| 66.7% | £150 | £250 | £2,500 | £100 | £0 | 25x |
| 50% | £200 | £300 | £3,000 | £120 | −£20 | 30x |
| 25% | £400 | £500 | £5,000 | £200 | −£100 | 50x |
The break-even row is the one worth remembering. Expected cost equals the bonus when 0.04 × 10 × (bonus + deposit) equals the bonus, which solves to a deposit of one and a half times the bonus — a match of 66.7%. Above that line a deposit-plus-bonus 10x offer still hands you something; at 50% it costs you £20 to accept £100, and at 25% it costs £100 to accept £100.
The same offer written on a bonus-only basis cannot get there. Ten times £100 at a 4% edge is £40 of expected cost against a £100 bonus, whatever the match percentage happens to be, because the deposit never enters the sum. That is the whole difference the three words make.
What the UK cap is written against
Since 19 January 2026, social responsibility code provision 5.1.1 has stopped Gambling Commission licensees requiring customers to play through bonus funds more than ten times — the change we set out in our guide to the 10x wagering cap. The unit matters. The cap is expressed against the bonus, so a requirement stated as ten times deposit plus bonus produces a play-through of bonus funds well above ten times: twenty on a 100% match, thirty on a 50% match.
The practical consequence for a player is simple enough. If you are reading terms on a site that holds a Great Britain licence and the requirement is quoted on deposit plus bonus, that phrasing and the capped figure are describing different things, and it is worth asking the operator which one applies before you deposit. If the answer does not match the terms, the complaint goes to the operator first and then to its alternative dispute resolution provider. Sites outside the Commission’s remit are not bound by the cap at all, which is precisely why the basis is worth checking rather than assuming.
When the basis meets the contribution rate
The two multipliers compound, and the combination produces figures that sound implausible until you do the division. A £100 bonus on a 100% match with a 10x deposit-plus-bonus requirement is £2,000 of contributing turnover. Clear that on a table game contributing 10% and you need £20,000 of stakes. At a 0.5% house edge — about as good as blackjack gets with correct basic strategy — the expected cost is exactly £100.
10 × (£100 + £100) ÷ 0.10 = £20,000 in stakes
£20,000 × 0.5% = £100 expected cost, against a £100 bonus
That offer is a coin flip dressed as a promotion: the low-edge game that feels like the careful choice hands the whole bonus back in expectation. Our wagering requirements calculator will run the same sum on your own numbers. For the mechanics of how requirements are worded and how bonus balances are separated from cash, start with understanding wagering requirements, and for the clause that can cost you the bonus outright see excluded games versus 0% contribution.
Frequently Asked Questions
What does “10x deposit + bonus” actually mean?
It means the wagering requirement is ten times the total of your deposit and the bonus, not ten times the bonus. On a £100 deposit matched with a £100 bonus that is £2,000 of turnover rather than £1,000 — the same stated multiplier producing twice the play.
Is a bigger match percentage always better?
On a bonus-only basis, larger is better. On a deposit-plus-bonus basis a smaller match is doubly punishing, because the deposit you have to make is larger and sits inside the multiplicand: a stated 10x behaves like 15x at a 200% match, 20x at 100% and 30x at 50%.
At what point is a deposit + bonus offer not worth taking?
On slots with a 4% house edge and a 10x deposit-plus-bonus requirement, expected cost equals the bonus at a match of 66.7%. Below that the offer has a negative expected value before you place a bet: a 50% match costs about £120 in expected losses to collect £100.
Does the UK 10x cap apply to deposit + bonus wagering?
The cap in force since 19 January 2026 is written against bonus funds: a licensee cannot require play-through of the bonus more than ten times. A requirement quoted on deposit plus bonus produces a higher play-through of the bonus than that, so on a Great Britain licensed site it is worth confirming with the operator which basis is being applied.
How do I compare two bonuses with different bases quickly?
Convert both into multiples of the bonus. Multiply the stated requirement by one plus the deposit divided by the bonus, then divide by the contribution rate of the game you intend to play. Whichever offer needs fewer stakes per pound of bonus is the cheaper one, regardless of which headline looks larger.
Expected cost describes an average over many bets, not a result you will experience on any single one, and no promotion is a reason to deposit more than you intended. 18+. If gambling stops being fun, see our responsible gambling resources.