Most bettors spend all their energy deciding which side to bet and almost none deciding how much. That’s backwards. Over a full season, bet sizing has more to do with whether you end up ahead than any single pick does.
Here’s the fundamental: think in units, not dollars. A unit is a fixed percentage of your total bankroll — most disciplined bettors land somewhere between 1% and 3% per play, with bigger numbers reserved for the games they have the most conviction on. If your bankroll is $500, a 2% unit is $10. That’s it, win or lose, game after game. The number only changes when your bankroll does — not when your mood does.
That last part is where most people actually get into trouble. It’s rarely one bad bet that wrecks a bankroll. It’s the bet after the bad bet — doubling up to chase Thursday’s loss back before Sunday, or tossing 10% of the bankroll at a game because it “feels like a lock.” Neither has anything to do with the matchup. Both have everything to do with emotion overriding a plan that was working fine an hour earlier.
Flat, consistent sizing does something specific: it keeps one cold week from being able to end your season. Betting has real variance built in — even a well-reasoned pick loses a meaningful share of the time, which is exactly why tracking your results honestly over time matters more than judging yourself off any single Sunday. A bettor risking a disciplined 2% a game can survive a five-game skid without much damage. A bettor swinging 10-15% a game usually can’t — and the math doesn’t care how right they end up being eventually if they’re broke before eventually arrives.
It’s also worth remembering that unit size and win rate are two different problems, and no amount of one fixes the other. Even accounting for what the vig is actually costing you on every play, a bettor with a modest real edge but reckless sizing can still go broke, while a disciplined bettor with a smaller edge can stay in the game long enough for that edge to show up in the results.
Set your unit size before the week starts, not during it. Revisit it monthly or quarterly based on where your actual bankroll sits — not after one big win or one ugly beat.
Fundamentals like this are the floor, not the ceiling. Once the sizing and the discipline are in place, the next real edge tends to come from the reasoning behind the picks themselves — the matchup factors, the line movement, the things a full-time, experienced set of eyes on a game tends to catch that a quick look at the schedule doesn’t. That’s the part our team spends its time on every week.