how often do 12 seeds beat 5 seeds

In NCAA March Madness tournaments, 12-seeded teams upset 5-seeded teams about 35-36% of the time in the first round.

This matchup has produced some of the bracket's most reliable drama since the field expanded to 64 teams in 1985, with 12 seeds holding a 57-103 record against 5 seeds as of recent tallies. That's a 35.6% win rate , far higher than you'd expect for a seven-seed gap—making it a staple pick for fans chasing perfect brackets. Over the decades, at least one 12-over-5 upset has happened in 34 of the last 40 tournaments, with outliers like 1988, 2000, and 2023 bucking the trend.

Historical Stats

Here's the big picture from comprehensive records:

Metric| Details
---|---
Overall Record| 57 wins for 12 seeds, 103 for 5 seeds (35.6% upset rate) 1
Recent Win %| Similar at ~36% (55-99 through earlier years) 5
Consistency| 34/40 tournaments with ≥1 upset; 3 upsets in 2019, 2013, 2014 9
ATS Performance| 12 seeds 32-27-2 (56.5%) against the spread since 2005 3

These numbers highlight why oddsmakers and analysts often lean toward the underdog here—5 seeds are typically top-20 caliber, yet they falter under tournament pressure.

Iconic Upsets

Relive the chaos with standout moments:

• 2025 : McNeese edged Clemson 69-67; Colorado State topped Memphis 78-70.

• 2024 : Grand Canyon beat Saint Mary's 75-66; James Madison stunned Wisconsin 72-61.

• 2022 : New Mexico State ousted UConn 70-63; Richmond slipped past Iowa 67-63.

• 2019 Magic : Oregon crushed Wisconsin 72-54, with Murray State and Liberty also advancing.

The farthest advances? A 12 seed reached the Elite Eight (e.g., 2022's run), but none deeper—yet the first-round thrill keeps fans hooked.

Why It Happens So Often

Multiple viewpoints explain the trend. Bettors note 12 seeds cover spreads reliably, averaging +1.5 points since 2005, thanks to motivated mid-majors facing potentially overrated power-conference 5s. Forums buzz about it yearly—Reddit threads question if 12s are even "favored" in vibes, while experts call it bracket gospel. In 2026's tourney talk, it's still the "must- pick" upset, with history backing at least one per year.

As of March 2026, no major shifts have altered this pattern post-2025.

TL;DR: Expect a 12-over-5 upset roughly 1-in-3 times—it's March Madness' signature first-round surprise.

Information gathered from public forums or data available on the internet and portrayed here.