Ties do not happen often in the NFL unlike in soccer betting, so the overtime period counts when you place an NFL bet. Whether you are betting the full game or just the 2nd half or 4th quarter, overtime will always be counted to grade your bet. For example, you placed a +3 point spread bet on the Dolphins against the 49ers. The game went to overtime. Your wager won't be graded until the game concludes, if the 49ers score a touchdown at extra time, you'll lose your bet. The only scenario that overtime is not counted in NFL betting is when it is clearly stated before you place your wager.