KEY TAKEAWAYS
A first-half total is an over/under bet on the combined score of both teams in the first half of a game. The sportsbook posts a number, such as 23.5, and the bettor chooses whether the two teams will score more (over) or fewer (under) points than that number by halftime. Only first-half points count, and the rest of the game is irrelevant to the bet.
The bet looks like a smaller copy of the full-game total, but it is its own market with its own line and price. A first-half total is usually priced at −110 on each side, which means a bettor must win 52.38% of such bets to break even, so the vig applies exactly as it does on any other total. A shorter window does not make a bet cheaper; it only changes what is being counted.
This guide explains how first-half and other period totals work, shows a hypothetical game settled three ways, compares the break-even math, and lists what to check before betting. It builds on what over/under means in betting, and every team, score and line used here is hypothetical.
What a First-Half Total Is
A total is a bet on the combined score rather than on who wins. A first-half total applies the same idea to a slice of the game, so only the points scored before halftime are added together and compared with the line. If the line is 23.5 and the halftime score is 13–10, the combined 23 points is under the line.
The same structure appears for other segments. Quarter totals, period totals in hockey and second-half totals work the same way, each with its own line, and each segment is a separate market that the bettor can bet on without touching the others. A second-half total counts only second-half points, and overtime is normally outside both halves.
First-half totals are one of several ways to bet on scoring. A team’s own score can be bet on through team total bets, and the full-game total covers the whole result. The first-half total sits between them: it covers both teams, but only part of the game.
Names and availability vary. Which segments are offered, and what they are called, depends on the sportsbook and the sport, so the house rules define what counts as the first half.
How First-Half Totals Are Set and Settled
Sportsbooks set the first-half line separately from the full-game line. It is often near half of the full-game number, but it is not required to be exactly half, because scoring is not spread evenly across a game and each market is priced on its own.
Both sides are usually priced at −110. Using the formulas for implied probability, each side implies 110 ÷ 210 = 52.38%, and the pair adds to 104.76%, the same overround as a standard full-game total. The sportsbook’s theoretical hold on a balanced market is 1 − 1 ÷ 1.0476 = 4.55%.
Settlement
The bet is graded at the end of the first half. Over wins if the combined first-half score is above the line, under wins if it is below, and a score exactly on a whole-number line is a push, which returns the stake. A half-point line, such as 23.5, cannot push.
Rules that vary
Some rules differ between sportsbooks and leagues, including what happens if a game is postponed, suspended or abandoned before halftime, and how stat corrections are handled. The sportsbook’s house rules decide these cases, so they deserve a read before betting.
Worked Example: A Hypothetical Hawks vs. Bears Game
Suppose the hypothetical Hawks and Bears have a full-game total of 47.5, a first-half total of 23.5 and a second-half total of 24.5, each priced at −110 on both sides. A bettor takes the under on the first half, risking $110 to win $100. The Hawks lead 13–10 at halftime, so the first-half combined score is 23, which is below 23.5. The under wins, for a profit of $100 and a total return of $210.
The game finishes 27–24, a combined 51. That total is above 47.5, so a full-game over would also win, and the second half produced 51 − 23 = 28 points, above 24.5, so a second-half over would win too. The three markets graded independently on the same game. If the first-half line had been the whole number 23 instead, the halftime score of 23 would have been a push and the $110 returned. This is an illustration of settlement, not a recommendation of any bet.
The Numbers That Matter: Three Totals on One Game
The table lists three hypothetical totals for the game above, with the standard price on each side and the result when the halftime score is 13–10 and the final score is 27–24. The halves do not need to add up to the full-game line: 23.5 plus 24.5 is 48, while the full-game line is 47.5.
| Market | Line | Price (each side) | Break-even win rate | Result |
|---|---|---|---|---|
| Full-game total | 47.5 | −110 / −110 | 52.38% | Over wins (51) |
| First-half total | 23.5 | −110 / −110 | 52.38% | Under wins (23) |
| Second-half total | 24.5 | −110 / −110 | 52.38% | Over wins (28) |
Every row needs 52.38% to break even, because the price is the same. The cost builds up across bets. A $110 bet at −110 with a true 50% chance has an expected value of 0.50 × $100 − 0.50 × $110 = −$5.00, which is 4.55% of the stake. Three such bets lose an expected $15.00 in total, three times the cost of one, so adding extra markets adds extra vig rather than spreading it. A true 50% chance is an assumption used for illustration, and over time the average bettor loses.
Common Mistakes With Period Totals
The first mistake is assuming the first-half line is half of the full-game line. The two are set independently, so a 47.5 total can sit beside a 23.5 or a 24.5 first-half line.
The second is treating the markets as linked. A full-game over and a first-half under can both win, as the example shows, because each bet is graded only on its own window.
The third is believing that more bets spread the risk. Each additional total carries its own margin, so more bets means more vig paid, as the three-bet calculation shows.
The fourth is assuming overtime counts. Overtime usually belongs to the full-game result and not to a half, but overtime handling varies by sportsbook and by market, so the house rules should be checked.
Practical Tips Before Placing a Bet
Confirm what window the bet covers. The bet slip should say first half, second half, quarter or period, and the house rules define when each one ends.
Check whether the line is a whole number or a half-point. A whole-number line can push and return the stake, which slightly changes the break-even math compared with a half-point line.
Convert the price to a break-even rate before betting. At −110, the bet needs 52.38%, so a bettor should ask whether that rate is realistic across many bets, not one.
Set a budget before betting and treat it as the cost of entertainment. Sports betting carries real financial risk, and legality and minimum age vary by state.
Where to Go Next
Period totals are easier to judge once the vig is clear, and what the vig is shows how the margin sits inside both sides. The break-even rate behind every −110 total is explained in why a bettor needs to win 52.38% at -110, and the way several bets add up in cost connects to bankroll management for sports betting, which covers how much of a budget each bet should use.
Frequently Asked Questions
