Grosvenor Review: What Its Prices Cost You Per £100 Staked
This is a price measurement, not a product review. Grosvenor was measured on the same basket as every other book in the August 2026 study — 58 of its match-result markets priced in the capture window — and came out 7th of 18 in the ranking — 7.90% margin, £7.33 per £100 staked. Nothing about its app, its offers or its service is measured here.
Commercial relationship. Grosvenor is a commercial partner and the link below is a paid one. Its place in the ranking is set by the measurement and was not adjusted for that.
What Grosvenor charged in the August 2026 sample
- Margin
- 7.90%
- Cost per £100
- £7.33
- Rank
- 7 of 18
- Markets sampled
- 58
The margin is the overround: add up the implied probability of every outcome in a market and a fair book totals 100%. Grosvenor totalled 107.90% on average, and that surplus is the charge. Expressed against your stake rather than against the fair book it comes to £7.33 per £100 — the two figures measure the same thing from different ends, which is why both are printed rather than one.
In this window the keenest book measured £5.67 per £100 and the dearest £10.58. Grosvenor sat £1.66 above the keenest end and £3.25 below the dearest. Its immediate neighbours were Casumo, level on price, and William Hill just dearer.
Grosvenor odds by competition
The same operator, the same window, 5 different answers — 5.80 points between Grosvenor’s own best and worst. A margin is not one number an operator sets; it is set market by market.
| Competition | Margin | Cost per £100 | Against its own average |
|---|---|---|---|
| Premier League | 5.10% | £4.85 | -2.80 |
| ATP Canadian Open | 5.49% | £5.20 | -2.41 |
| Championship | 7.14% | £6.66 | -0.76 |
| League Two | 10.89% | £9.82 | +2.99 |
| League One | 10.90% | £9.83 | +3.00 |
Every figure in that table is also Casumo’s, to the penny: the two published the same prices in all 58 markets, so one per-competition table serves both brands. Read across it and the span inside Grosvenor is 5.80 points, from 5.10% on Premier League to 10.90% on League One — and holding an account at both brands does nothing to narrow it.
What a 7.90% margin costs over a year
Grosvenor charges 7.90% on turnover, not on deposits. Stake the same pound twice and it is charged twice, which is what turns a small percentage into a yearly figure.
| Staked in a year | Cost at 7.90% | At the keenest measured | Difference |
|---|---|---|---|
| £1,000 | £73 | £57 | £16 |
| £5,000 | £367 | £284 | £83 |
| £20,000 | £1,466 | £1,134 | £332 |
These are arithmetic on the measured margin, not a prediction about anyone’s results. What happens to individual bets is a separate matter entirely; the margin is the part that is known in advance and charged whatever happens.
The third column is the same turnover at the keenest margin in this window, Betfred. At £5,000 staked the gap is £83 a year — worth setting against whatever the sign-up offer is worth, because one is charged every year and the other arrives once.
Grosvenor and Casumo published identical prices
Across the 58 markets both brands priced in this window, Grosvenor and Casumo published the same set of prices 58 times. Not a similar average — the same numbers, market after market.
That only means something next to what ordinary pairs do. Of the 153 pairs of books compared in this sample, the median pair agreed on 1.8% of the markets they both priced. The closest pair that did not match everywhere was William Hill and 888sport, at 44 of 57. Two books running separate trading desks disagree constantly, even when their averages land within a hundredth of each other.
The reading is a shared pricing platform. That is an inference drawn from the prices, not something the Gambling Commission’s register records, and it is set out here as such. The two are separate licence holders on the register, so whatever they share is not the licence.
For a bettor the practical consequence is short: holding accounts at both brands adds no choice of price in these markets. It is the same book twice.
Who holds the Grosvenor licence
| Licensed entity | Rank Interactive (Gibraltar) Limited |
|---|---|
| Account number | 57924 |
| Licence number | 057924-R-334666-005 |
| Held since | March 2022 |
| Domain registration | grosvenorcasinos.com · Active |
Grosvenor is a brand, not a licensee. The Commission licenses Rank Interactive (Gibraltar) Limited under account 57924 for remote betting on real events, and every price measured on this page was published under that licence. The account has held it since March 2022.
The same account carries 11 further active domains outside this study: bellacasino.com, kittybingo.com, luckypantsbingo.com, luckyvip.com, magicalvegas.com, meccabingo.com, meccagames.com, regalwins.com, rialtocasino.com, spinandwin.com, thevic.com. What sits behind each of those is not something we measure; they are listed because the licence is the part of a brand’s ownership that is public, and the rest of it generally is not.
Grosvenor on the Gambling Commission’s register
The Commission’s register of regulatory actions currently lists nothing against Rank Interactive (Gibraltar) Limited. That is what the register shows on the date we checked it, 7 August 2026, and not a judgement about the operator: matters age off the register over time, and an absence today is not a guarantee about the past.
Where an operator in this study does carry an action, it is printed on its own page with the date and the published outcome, whether or not we earn from it.
Where Grosvenor sits in the study
7 of 18 puts Grosvenor in the middle third of the table. That is one capture window, one market type and 5 competitions, so it is a finding about this sample rather than a verdict on the operator. A different basket would produce a different order, and saying so is not a hedge — it is what the method page commits us to.
The full table, exchanges included, is on the register; how the figure is calculated is on the method page.
Visit Grosvenor (opens in a new tab) 18+ · commercial link · terms apply at the operator
Questions about Grosvenor
What margin did Grosvenor charge?
7.90% across the 58 match-result markets we sampled on 7 August 2026, which works out at £7.33 per £100 staked. That is one capture window on one market type and is not a statement about its prices today.
Is Grosvenor cheap or expensive compared to other bookmakers?
It ranked 7 of 18 bookmakers in this sample, keenest first. The keenest measured £5.67 per £100 and the dearest £10.58, so Grosvenor sat £1.66 above the keenest end and £3.25 below the dearest.
Is Grosvenor licensed in Great Britain?
Yes. The Gambling Commission licenses Rank Interactive (Gibraltar) Limited under account 57924, licence 057924-R-334666-005, held since March 2022 and active when we checked the public register. Grosvenor is a brand operated under that licence, not a licensee in its own right.
Who actually operates Grosvenor?
Rank Interactive (Gibraltar) Limited. The Commission lists 11 other active domains against that account, none of them measured in this study.
Does Grosvenor have a regulatory record?
Nothing is currently listed against Rank Interactive (Gibraltar) Limited on the Commission’s register of regulatory actions. That is a statement about what the register shows today, not a clean bill of health for all time — matters age off the register over time.
Does the margin apply to every market at Grosvenor?
No. These are match-result markets across 5 competitions. Within that sample its keenest competition was Premier League at 5.10% and its dearest was League One at 10.90%, a span of 5.80 points. Other market types are not measured here at all.
What does a 7.90% margin cost over a year?
At £5,000 staked across a year, roughly £367. The margin is charged on turnover, not on deposits, so it recurs on every bet rather than once — which is why it can outweigh a welcome offer several times over.
Do you earn money if I use Grosvenor?
Yes. Grosvenor is a commercial partner and the link on this page is a paid one. Its position in the ranking is set by the measurement and is not adjusted for that, which is why partners appear across the table rather than at the top of it.
Why are Grosvenor and Casumo prices the same?
Across the 58 markets both priced in this window, the two published an identical set of prices 58 times. Two books running separate trading operations do not do that: the typical pair in this sample agreed on 1.8% of markets. The obvious reading is a shared pricing platform, which is an inference from the prices rather than something the Commission’s register records.
Can I check these figures myself?
Yes, and that is the intention. The formula, the basket, the exclusion rules and the test vectors are published on the method page, and the odds calculator runs the same arithmetic on any prices you enter. The figures here are ours and can be wrong; where a check shows they are, they change.