How Power Plays and Penalty Kills Move NHL Totals

Published September 7, 2026 · 8 min read · By the OddsLighthouse Editorial Team

An NHL power play usually eats up somewhere around four to six minutes of a 60-minute game once you add up every minor penalty called, yet it accounts for a share of total scoring that's wildly out of proportion to that clock time. A team skating with a man advantage scores at several times its usual five-on-five rate, which means special teams — not just raw shot totals or goaltending — are one of the more underrated inputs into how a game's total gets built and how it can drift once the puck actually drops.

Why so few minutes carry so much scoring weight

Five-on-five hockey is a low-scoring, defensively structured game by design — five skaters a side, tight neutral-zone play, and goaltenders who see a steady but unspectacular stream of shots. A power play changes that math immediately. With an extra skater and a defense forced to collapse and rotate to cover more ice than it has bodies for, the attacking team generates more shots, more high-danger chances, and more goals per minute than it does at even strength, often by a wide margin. Because a typical game features several penalties in either direction, those short bursts of man-advantage hockey end up contributing a meaningfully outsized share of a game's total scoring relative to the small slice of clock time they occupy.

That's the reason special teams get their own line of analysis rather than getting folded into a team's overall scoring rate. A team that scores exactly the same number of goals per game as a rival can get there in very different ways — one leaning on a dominant power play to convert a handful of chances a night, the other grinding out goals almost entirely at five-on-five — and those two paths respond differently to a specific matchup's number of expected penalties.

Power-play percentage and what it actually measures

Power-play percentage is simply the share of power-play opportunities that result in a goal before the penalty expires. League-wide, that number typically sits somewhere in the high-teens to low-20s percent across a season, with the best units in the league running several points above that and the weakest units running several points below it. The gap between a top-tier power play and a bottom-tier one is genuinely large in practical terms — a unit converting at a rate several percentage points higher than another isn't a small statistical footnote, it's the difference between averaging noticeably more power-play goals across a full slate of opportunities over a season.

What the raw percentage doesn't tell you on its own is opportunity volume. A team can carry a strong conversion rate but draw relatively few penalties a game, which caps how much that efficiency actually contributes on a given night. Pairing power-play percentage with a team's typical number of power-play opportunities per game gives a much better read on expected special-teams scoring than either number in isolation.

Penalty kill: the mirror image of the same problem

Penalty-kill percentage measures the opposite side of the same coin — the share of opponent power plays a team successfully defends without allowing a goal. Just as with power-play units, the spread between the league's best and worst penalty kills is substantial, and a team that struggles to kill penalties is effectively handing opponents a higher expected scoring rate every time it takes a minor. Because penalties are common across nearly every NHL game, a genuinely weak penalty kill isn't an occasional liability, it's a recurring one that shows up multiple times a night in a way a shaky five-on-five defense might not.

It's also worth separating penalty-kill percentage from raw shot suppression. A penalty kill can allow relatively few shots but still surrender goals on the ones it does allow if its goaltender or shot-blocking structure isn't holding up under pressure — and conversely, a unit that allows a decent volume of shots but collapses cleanly around the net and gets timely saves can still post a strong kill percentage. Both versions of a "good" penalty kill exist, and neither shows up clearly unless you look past the single summary number.

Discipline: the variable neither number captures alone

Power-play and penalty-kill percentages describe what happens once a penalty is called. They say nothing about how often a specific matchup is likely to generate penalties in the first place, which is its own separate variable driven by each team's discipline, physical style, and — to a real but harder-to-quantify degree — how a specific officiating crew tends to call a game. A team that plays a physical, penalty-prone style against a team that draws penalties aggressively (drawing minors through hustle, forecheck pressure, and net-front battles) sets up a game likely to feature more total power-play time than a matchup between two disciplined, low-penalty clubs, independent of either team's actual special-teams efficiency.

This is the piece that's easy to skip past when just glancing at power-play and penalty-kill rankings. Two teams can both rank near the top of the league in special-teams efficiency and still combine for a relatively low-event total simply because neither takes many penalties — the efficiency is real, but the opportunity volume to use it is low.

A worked example

Consider two teams meeting on a given night. Team A converts on roughly one in four power-play chances and typically draws about three opportunities a game; Team B kills penalties at a below-average rate and averages a similar number of minors taken. On paper, that combination — an above-average power play facing a shaky penalty kill, with a normal expected volume of penalties — points toward more special-teams scoring than a matchup where either side ran a middling power play or a strong penalty kill instead. A totals number for that game reflects an expectation built from many such matchup layers, and special teams is one of the more direct, quantifiable ones, since power-play and penalty-kill rates are tracked cleanly and updated constantly across a season.

Matchup math: strong power play vs. weak penalty kill

The clearest, most directly bettable version of this dynamic is a genuinely elite power-play unit facing a genuinely poor penalty kill. That combination doesn't guarantee a specific outcome in any one game — hockey has real game-to-game variance, and a single game is a small sample even for a well-established statistical edge — but across a season it's one of the more reliable situational factors in how books and sharp bettors think about a total. The same logic runs in reverse for a below-average power play running into a top penalty-killing team, where the expected special-teams contribution to scoring shrinks accordingly.

For a broader look at how markets price hockey games overall, see our NHL betting guide, and for how a single position can move a line just as directly as special teams do, see our piece on NHL goaltending — the two effects (goaltending and special teams) often get layered together in the same game.

Referee tendencies and how they factor in

Officiating crews aren't perfectly uniform in how tightly they call a game, and some referees are publicly known — through publicly tracked penalty-count data — to call noticeably more or fewer minors per game than the league average. That doesn't override team-level discipline as the primary driver of expected penalties, but it's a real secondary input that sharper models and bettors sometimes weigh when a specific crew is confirmed for a game, particularly in the postseason when officiating tendencies get discussed more openly. It's a smaller factor than team style or special-teams rankings, but it's not nothing.

Where this actually shows up in the number

None of this is hidden information — power-play and penalty-kill percentages are public, updated daily, and absolutely factored into how sportsbooks build their totals in the first place. The practical value for a bettor isn't discovering a secret edge; it's understanding why a total looks the way it does for a specific pairing, and having a framework for noticing when a market hasn't fully adjusted to a recent, meaningful shift in a team's special-teams performance (a power play that's cooled off significantly over its last ten games, for instance, or a penalty kill that's improved after a goaltending change). Treat it as one layer among several — pace, goaltending matchup, and rest all matter too — rather than a standalone system, and keep it inside a broader bankroll management approach.