A dead heat does not void a bet — it shares it

What a dead heat is

A dead heat is a market in which the outcome is shared by more than one selection — a tie at the top of a market the rules treat as a single place, or a race in which two selections cannot be separated. The market is defined so that one outcome pays, and when more than one selection occupies it, the settlement spreads the stake rather than picking a winner.

Two things follow from that definition, and they are the source of nearly every argument about it:

• Nothing is voided. The stake is not returned as it is in a void market. It is divided, and the part on a winning selection pays profit at the price on the slip.
• The number of selections matters more than the price. A dead heat between two selections divides the stake in two; between three, in three. The arithmetic is stated by the rules and is not a matter of discretion.

How the division works

The common mechanism is to divide the stake by the number of selections that dead-heated, pay the profit on one part at the full price, and return the rest of the stake. The worked example below uses round numbers to make the shape visible; the rule that governs your account is the one that states the divisor and the treatment of the stake.

Two habits make this predictable. First, read the divisor the rules state rather than assuming it is the number of selections you can see — some markets define places by position, and a tie for a defined place is what dead-heats. Second, remember that the reduction scales with the size of the tie: a three-way dead heat divides the stake three ways and reduces the return much further than a two-way one.

Deductions, and why they exist

A deduction is a different mechanism with a similar effect on the number at the end. It reduces the price of a bet to account for something that happened after the bet was struck but before the event was decided — most often the withdrawal of another selection, which made the remaining selections more likely to win.

The rule exists because the price on your slip was set when the market contained selections that have since gone. Applying the original price to a smaller field would pay more than the market now implies, so a published scale reduces the price. The scale is part of the rules and it is normally expressed as a series of bands.

The direction is the part that matters: a deduction is a reduction of a return you would otherwise have received in full, applied because the market changed rather than because the bet was wrong. It is published in bands rather than applied at the operator's discretion, and the bands are the thing to check on your own account.

Non-runner deductions

A non-runner deduction is the withdrawal case applied to a bet you did not lose. The withdrawal is of another selection, and the deduction is applied to the price on the slip before the profit is worked out.

Both mechanisms — the dead-heat divisor and the deduction scale — are examples of the same idea: the market changed, so the settlement record is adjusted, and the adjustment is written down in advance. Reading the two scales together once is what makes a reduced balance legible instead of startling.