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What does EVS mean in betting? Evens, priced in pounds
EVS means evens: 1/1, 2.0 decimal, a 50% implied chance, and £10 returns £20. The prices either side of evens, and what the margin costs, in pounds.
In betting, EVS means evens, or even money: a price where the profit equals the stake. It is 1/1 in fractional odds, 2.0 in decimal and +100 in American odds, and it implies a 50% chance. A £10 bet at EVS returns £20 if it wins: the £10 stake back plus £10 profit.
This is an evergreen explainer, with no news event behind it. The rest prices the odds either side of evens, in pounds.
What does EVS mean in betting, and where does 50% come from?
This desk read the Standard’s EVS explainer, by Jack Tanner and dated 10 September 2026, on 15 October 2026. It gives EVS as shown three ways (EVS, Evens or 1/1), as 2.0 in decimal and +100 in American odds, and as a roughly 50 per cent implied chance before the bookmaker’s margin.
The conversion is two formulas, both on Wikipedia’s mathematics of bookmaking page, read the same day:
- decimal odds = fractional odds + 1, so 1/1 becomes 2.0;
- implied probability = 1 ÷ decimal odds, so 2.0 becomes 50%.
The same page calls the amount by which a market’s implied probabilities add up to more than 100% the overround, or bookmaker margin.
Is evens a good price? The ladder either side of EVS
Evens is neither good nor bad on its own; it is the point where a price stops being odds-on. Shorter prices return less than double the stake, longer ones more. The desk’s arithmetic, from the two formulas above:
| Fractional | Decimal | Implied probability | £10 returns |
|---|---|---|---|
| 4/5 | 1.80 | 55.56% | £18.00 |
| 5/6 | 1.833 | 54.55% | £18.33 |
| 10/11 | 1.909 | 52.38% | £19.09 |
| EVS (1/1) | 2.00 | 50.00% | £20.00 |
| 11/10 | 2.10 | 47.62% | £21.00 |
| 6/5 | 2.20 | 45.45% | £22.00 |
Returns include the stake and are rounded to the penny. These are illustrative prices, not any bookmaker’s current quote.
Why are close markets priced at 10/11 rather than evens?
The Standard says that when an event is too close to call, bookmakers offer the same odds on every side, but with their margins factored in they will “likely make all parties odds-on, rather than evens”. It gives no figure. The figure is the book: add up the implied probabilities of every outcome.
| Both sides at | Book | Overround | Average return on £10 at a true 50% |
|---|---|---|---|
| EVS | 100.00% | 0% | £10.00 |
| 10/11 | 104.76% | 4.76% | £9.55 |
| 5/6 | 109.09% | 9.09% | £9.17 |
| 4/5 | 111.11% | 11.11% | £9.00 |
The 5/6 row matches Wikipedia’s own hypothetical: two evenly matched tennis players, fair at evens, which a bookmaker would probably price at 5/6 each, for a 109.09% book. MathsWins works the 10/11 case as a coin toss at 1.91 a side and rounds the book to 104.7%; this table uses the exact 10/11 price, 21/11 in decimal, which gives 104.76%. The last column is half the winning return, for example 0.5 × £19.09 at 10/11. At 4/5 a side, a pound in every ten staked is the cost of the bet.
The margin compounds. Wikipedia shows a double of two 5/6 shots reaching a 119.01% book, more than twice the single-bet overround. The same multiplication runs through every multiple settled in the Lucky 31 vs Lucky 15 post.
EVS vs EV: the price and the calculation
EVS is a price. EV is expected value, the average result of a bet over many repeats, a distinction the Standard’s explainer also draws. At evens, EV is zero only when the true chance is exactly 50%. £10 at EVS on an outcome with a 55% chance has an EV of +£1 (0.55 × £20 − £10); at 45%, it is −£1. The true chance is an estimate; the margin in the book is arithmetic on the prices shown.
Two other adjustments can sit on top of an evens price. An each-way bet splits into a win part and a place part at a fraction of the odds, worked through in what each way means in betting. A late withdrawal in a horse race can bring a Rule 4 deduction from winnings at any price, evens included; how it is applied is in what Rule 4 actually costs.
Frequently asked questions
Is evens 1/1? Yes. Evens, EVS and even money are all 1/1 in fractional odds: the profit equals the stake. In decimal odds the same price is 2.0, because decimal odds include the returned stake, and in American odds it is +100. Converted to an implied probability, 1 ÷ 2.0, it is 50%, before any bookmaker’s margin.
What does £10 at evens return? £20 if it wins: the £10 stake back plus £10 profit. A quick check is to double the stake. A losing bet returns nothing. For comparison, £10 at 10/11 returns £19.09 and £10 at 11/10 returns £21.00, so one rung either side of evens moves the return by about a pound.
What is the difference between EVS and EV in betting? EVS is a price, evens, quoted by the bookmaker. EV is expected value, a calculation of what a bet returns on average over many identical repeats. A bet at EVS has positive EV only if its true chance is above 50%, and a bettor’s estimate of that chance can be wrong for a long run of results.
Evens looks like a fair coin and, in a close market, is likely to be priced as a slightly unfair one. Read the decimal before the stake, and fix in pounds what a week of betting is allowed to cost before the first bet goes on, not after a losing run.