"They're unbeatable at home" is one of the oldest lines in sports talk. Is it true, and is it already in the odds?
How big is home advantage?
Home teams win more often than away teams in almost every sport — though not always more than half their games, because draws count too. The size varies:
- NFL: historically worth around 3 points on the spread; in recent seasons many analysts estimate it closer to 1.5–2 points.
- NBA: traditionally around 3 points, also shrinking.
- Soccer: home teams win roughly 45% of matches in big European leagues, away teams around 30%.
- College sports: often larger, thanks to huge, loud crowds and inexperienced visiting players.
Why it exists
- Crowds — motivation for the home side, pressure on visitors.
- Referees — studies suggest crowds subtly influence decisions.
- Travel and rest — jet lag, time zones and fatigue.
- Familiarity — the pitch, the court, the altitude (hello, Denver).
The empty-stadium experiment
During the COVID-19 seasons of 2020–21, many games were played without fans. Research found that home advantage shrank noticeably in European soccer, and referees gave relatively fewer cards to away teams — strong evidence that crowds matter.[1]
Why it's shrinking
Better travel, sports science, analytics and video review have all reduced the edges that used to come from playing at home. The betting market has adjusted too.
How to use it
Home advantage is already in the line. Value comes from situations the market may misjudge: unusual travel, short rest, altitude, a hostile college stadium or an empty one. Compare your view with fair odds using the no-vig calculator and read value betting.
Sources
- Home advantage during the COVID-19 pandemic: analyses of European football leagues — Psychology of Sport and Exercise, 2021 ↩
