What happens if a match ends in a draw?
If you are betting on a 3-way market that includes the draw, such as match odds in soccer, then the draw is no different than any other outcome. If you backed one of the teams to win then that bet will lose. Any lay bets on that team would be winners.
If you are betting into a 2-way market (ie one that doesn’t include a ‘draw’ option) most bookies will settle on the result after overtime.
For sports that don’t go to overtime (ie AFL) most bookies will settle the bet as half win/half lose. For example, if you bet $100 at odds of 3.00, and it ends in a draw, you will lose half of your stake (-$50) but you will win with the other half ($50 @ 3.00), so your net profit will be $50.
The one bookie that has slightly different rules for draws in 2-way markets is Bet365.
For AFL, Bet365 will void all bets in the event of a draw. This works out better for you if you are on the favourite, but worse if you’re on the underdog.
For NRL, if a match goes to OT, they have an offer where they pay out on the winner (same as other bookies), but they also void bets on the loser. If it is still a draw after OT they will void all bets.