A void leg does not necessarily cancel an accumulator. Betfair's Void Bets help page says a treble with one void leg becomes a double; a double becomes a single. The remaining selections still determine the result. A void single, by contrast, returns its stake.
This guide explains the meaning of a void bet through one ordinary cash-funded fixed-odds multiple. It uses Betfair's published Sportsbook rules as a named example, with its Great Britain-facing rulebook checked alongside the help pages on 17 October 2026. It is not a rule for every bookmaker, country, sport or promotion.
One void leg changes the combination
An accumulator has one stake applied to a combination of selections. Its legs are not separately funded singles. Removing one leg's price therefore does not mean dividing the stake by the number of selections and refunding that fraction.
Betfair's general Sportsbook rules, under Multiples, describe the reduction when a leg is void. They also distinguish Fixed Odds Multiples from Same Game Multiples. The calculation below concerns separate-event selections, not a Bet Builder or an Exchange position.
A worked cash example
Suppose an accepted fictional treble has a £10 cash stake and decimal prices of 2.00, 3.00 and 1.50. These are invented teaching inputs, not available odds, suggested stakes or an actual account. Assume no promotion, deductions, fees, taxes or payout restriction changes the calculation.
| Leg | Accepted decimal price | Final status | Factor used |
|---|---|---|---|
| A | 2.00 | Win | 2.00 |
| B | 3.00 | Void | 1.00 |
| C | 1.50 | Win | 1.50 |
Before the void, the combined price was 2.00 × 3.00 × 1.50 = 9.00. Had all three won under those assumptions, the gross return would have been £10 × 9.00 = £90, including the original stake. That was a conditional potential return.
After B is void, remove its 3.00 factor. For the arithmetic, replacing it with 1.00 has the same effect: 2.00 × 1.00 × 1.50 = 3.00. With A and C both winning, the gross return is £30. Subtract the original £10 stake to get £20 profit.
There is no additional £10 refund on top of that £30. The £60 difference from the original potential £90 is a reduction in the conditional return, not a separate refund in this calculation. The original figure depended on a third price that no longer contributes.
If A instead loses, the remaining double loses in this simplified example: gross return £0 and net loss £10. If A is still undecided, £30 is only a possible return, not an amount already payable. Voiding B does not settle A.
For comparison, a separate £10 single on B would return £10 if fully void under the cited help-page treatment. Its net result would be £0. That is a different ticket, not an extra component of the treble.
Establish why the leg is void
Do not infer a void from a postponed fixture, a paused market or a withdrawn participant alone. Betfair's general rules give specific sports rules precedence when they conflict with the general rules. Confirm the actual grading and applicable market condition before entering a 1.00 factor.
A score-based push or half-settled Asian handicap can need a different calculation. Our Asian handicap settlement guide separates whole, half and quarter lines. Do not replace a partly returned component with a fully void leg without checking what was settled.
Check promotions and other multiple types separately
Betfair's published Acca Edge terms provide a concrete exception: a void leg removes Acca Edge, and the wager reverts to an ordinary accumulator using the original leg prices. An advertised protection feature should not be assumed to survive a void.
The cash example here does not calculate a free-bet token, enhanced-price offer, each-way multiple or a system bet containing several combinations. Read the accepted offer's terms before treating any return as cash or applying the same multiplication to every line.
Voiding is also different from cash out, which concerns an accepted early settlement. A missing cash-out button does not establish that a leg is void.
Reconstruct the accepted ticket
Use these checks when an account entry differs from your calculation:
- Confirm the bet type and whether its stake was cash or promotional credit.
- Record each accepted price and final leg status, including the reason for any void.
- Recalculate the surviving combination and distinguish gross return from profit.
- Compare the resulting credit with the account history and ask the operator which rule explains a difference.
Keep the accepted ticket identifier and applicable terms. Our broader sportsbook settlement guide explains the evidence chain from acceptance to grading and account posting. A live score or a provisional potential-return figure cannot replace that record.
Frequently asked questions
Does one void leg refund the whole accumulator stake?
Not under the ordinary Betfair multiple treatment described here. One void leg reduces the combination, so a treble can continue as a double. The example's £10 remains the stake on that surviving double. Whether it returns money depends on the other legs and any applicable special terms.
Why use decimal 1.00 for the void leg?
In this calculation, 1.00 is a neutral multiplier. It removes the void leg's accepted price without adding profit or deleting the original stake. In the fictional treble, 2.00 × 1.00 × 1.50 gives 3.00. This arithmetic represents the reduction; it is not a new price offered for betting.
Is the reduced potential return money I can withdraw?
No. A potential return assumes the outstanding required selections settle successfully. It is not an account credit or completed withdrawal. Check the final ticket and credited amount first. This guide does not test Betfair accounts, payment timing or withdrawal eligibility, and understanding the calculation does not make the wager safe.