There are no guarantees when the NFL postseason arrives.

Games are decided by thin margins. Teams are evenly matched.

The wildest sequences can turn games on their head or they can come down to who executes better on third-and-short. Broncos head coach Sean Payton has been on the wrong side of a pair of those during his time in New Orleans, via the Minneapolis Miracle in the 2018 divisional and an egregious pass-interference no-call against the Los Angeles Rams in the 2019 NFC title game.

If there’s any guarantee about Denver’s first home playoff game in a decade Saturday against Buffalo, it’s this: The Empower Field crowd is going to be loud.

Really loud.

“I expect it to be extremely loud,” quarterback Bo Nix said Tuesday. “I expect it to be a great environment. Similar to what it’s been recently of the past several home games, but something tells me it’ll be kicked up a notch just because it’s got ‘playoffs’ on it.”

Players and coaches alike say the noise at home has been particularly notable since a Week 11 win against Kansas City that got the Broncos to 9-2 going into their bye week.

It continued through home games against Green Bay and Jacksonville in December, which is when coach Sean Payton said Empower Field ascended to one of about four stadiums in the NFL that can be “deafening.”

Defensive lineman Jordan Jackson told The Post recently that he thought the crowd was at its loudest during a Week 16 loss to the Jaguars.

“I don’t think I’ve ever heard that stadium get that loud,” he said, pointing specifically to a Malcolm Roach sack on third-and-long. “Oh my god.”

Head coach Sean Payton in recent weeks has been preaching for weeks that the noise needs to crescendo as the opposing team gets into the huddle, not when they get to the line of scrimmage or when a play is happening.

“For years, we were conditioned to raise the noise level when they break the huddle,” Payton said this week. “The noise level needs to be loudest when they enter the huddle. Then can you do that — Can we do that collectively for 120 snaps? No, I just need it for half the snaps in the game. So, say, 65 snaps of 10 seconds. That’s a huge advantage.”

The Broncos have had scoreboard cues, including a pregame video featuring Peyton Manning, instructing fans to disrupt the opposing team’s huddle all season. Still, there are rarely louder moments in a stadium than when a big moment arrives.

That’s been the case at Empower Field this fall, too.

According to data compiled by the team, here are the five loudest moments of the season at Empower Field:

* Nix’s 18-yard, go-ahead touchdown run in the fourth quarter of Week 7 against the New York Giants

* Marvin Mims Jr.’s 70-yard punt return touchdown in Week 11 against Kansas City

* When the Chiefs were in their huddle on first-and-10 from their own 26-yard line in the fourth quarter of Week 11

* Nix’s touchdown pass to receiver Courtland Sutton in Week 1 against Tennessee

* Nix’s touchdown pass to receiver Michael Bandy in Week 15 against Green Bay

That leaderboard figures to get rewritten Saturday.

“I’ve been saying since I got here that we needed to get a home playoff game back in the city,” said wide receiver Courtland Sutton, a 2018 second-round pick and the second-longest tenured Bronco. “The way that the fans have been showing up, Broncos Country has been bumpin.’ … I can only imagine what it’s going to be like, first home (playoff) game since 2015.

“It’s well overdue, and I’m excited to see Broncos Country show up and show out.”

Want more Broncos news? Sign up for the Broncos Insider to get all our NFL analysis.