Dead Heat Calculator

The rule is set out by the Tattersalls Committee, whose rules govern settlement disputes on British horse racing bets and are the reference UK bookmakers follow. Rule 10 states that in the event of a dead heat a bet on either selection involved “loses half the stake, with full odds being applied to the remaining half”.

The general form, which covers ties for places as well as for the win, is a single fraction: your stake is multiplied by the number of places still to be filled, divided by the number of selections tied for them, and settled at the full price you took. Two runners tying for one place gives a factor of one half. Three tying for two places gives two thirds. The price is never touched — only the stake.

That distinction matters, because it is the opposite of how a Rule 4 deduction works. Rule 4 cuts your winnings and returns your stake in full. A dead heat cuts your stake and pays full odds on what is left — which means part of the money you actually risked is simply gone, whatever the result.

The Number Nobody Puts on the Coupon

Because the stake is divided, a winning bet caught in a dead heat only breaks even at a decimal price equal to the number of selections tied. Two tied runners need evens. Three need 2/1. Below that line the bet wins and still loses money.

A Dead Heat Priced as a Rule 4

The two rules can be put on the same scale. Ask what non-runner deduction would leave you with the same money as a two-way dead heat, and the answer falls out of the arithmetic: at decimal odds othe equivalent deduction is 1 − (o/2 − 1) ÷ (o− 1). It never goes below 50p in the pound however long the price, and it climbs steeply as the price shortens.

The line to remember is 2.25. At decimal odds of 2.25 a two-way dead heat costs exactly 90p in the pound, which is the largest deduction the Tattersalls Rule 4 scale can ever produce and the hard cap when several horses are withdrawn. Anything shorter than 2.25 and the dead heat is harsher than the worst non-runner outcome in racing — with no cap of its own to stop it.

Where It Really Hurts: The Place Part

An each-way bet is two stakes, and the place half is already paid at a fraction of the win odds. Halve that as well and the maths turns brutal. If the selection places but does not win, and dead-heats for the last place, the price needed just to get the whole outlay back is far longer than most punters would guess.

A worked example makes the size of it obvious. Back a horse at 10.00 (9/1) with £10 each way at 1/5 odds, four places paid. It finishes fourth, but three runners tie for the last two places. The place stake becomes £10 × 2/3 = £6.67, settled at 1/5 of 9/1, which is 2.80 decimal: a return of £18.67 against a £20 outlay. A £1.33 loss on a bet that placed. Without the dead heat the same bet returns £28.00 and profits £8.00.

Dead heats are commonest in horse racing, greyhounds and in outright markets settled on a table — top goalscorer, top club batter, first-round leader in golf. Football match markets almost never produce them, because the result is a scoreline rather than a photograph. For how place terms are derived in the first place, see our guide to outright betting and each-way terms.