Impeachment can be profitable, Republicans, Democrats and President Trump found this week.

“We’re going to raise a tremendous amount of money off this,” Harlan Hill, a Trump campaign surrogate and re-election advisory board member, told The Post. “Anytime there is some sort of dustup like this, whether it’s Mueller or anything else, we have a huge surge of donations. We’re kicking the Democrats’ ass.”

First son Eric Trump boasted on Twitter Friday night that the campaign had taken in almost $15 million on the issue — and signed up 50,000 new donors this week.

In a tweet Wednesday, Trump 2020 campaign manager Brad Parscale said his operation netted more than $5 million in donations in the first 24 hours after House Speaker Nancy Pelosi said she would begin a formal impeachment inquiry. In the days since, the campaign has sent out a blizzard of fundraising emails rallying the faithful.

“In this impeachment fight, you’re either with President Trump or you’re with Nancy Pelosi, Ilhan Omar, Alexandria Ocasio-Cortez, and their unhinged SOCIALIST MOB,” reads one which also has a promise to “quadruple match” any donation given.

Republican National Committee finance chairman Todd Ricketts said, “While irresponsible Democrats are seeking a vote on impeachment, countless Americans are voting with their check books — resulting in an unprecedented amount of financial support for the RNC … providing a down payment for President Trump’s victory in 2020.”

And it’s not just Trump cashing in.

During a powwow with California donors Thursday, former Vice President and Democratic frontrunner Joe Biden read directly from the whistleblower complaint alleging Trump attempted to pressure Ukrainian President Volodymyr Zelensky to investigate Biden’s son, Hunter, according to Reuters.

“We had our best week of fundraising this past week since the second week of the campaign,” a campaign insider told The Post.

When Trump demanded Rep. Adam Schiff — the House Intelligence Committee chairman who is leading the impeachment charge — resign from Congress, the California liberal immediately had his hand out, too.

“President Trump just demanded I resign from Congress. But I won’t listen. There’s nothing he or his right-wing allies can do to stop me from holding him accountable and seeking the truth. Pitch in to my campaign if you’re with me,” he said in a tweet Friday. A rep for the congressman did not immediately respond to request for comment on how much he took in.

Even Rep. Rashida Tlaib — a member of the so-called “squad” with Queens Rep. Alexandria Ocasio-Cortez, Minnesota Rep. Ilhan Omar and Massachusetts Rep. Ayanna Pressley — is getting in on the action, selling coarse custom T-shirts using her infamous “Impeach the MF” slogan for $29.

“It’s the standoff that everybody has been waiting for, and each base is very excited because now they get to fight the other side. It’s pure partisan warfare,” Evan Siegfried, CEO of the public affairs firm Somm Consulting, observed. “I don’t think that the House is going to be deciding what they do on impeachment based on fundraising, but it is sort of the icing on the cake.”

GOP operatives are banking on impeachment narrowing their uphill battle at retaking the House during the 2020 election cycle.

“Trump wants this fight,” an RNC operative told The Post. “I cover specifically 18 House Democrats … that are running for reelection in 2020. The job, the directive, I was just given was make sure I get on record every Democrat possible supporting impeaching the president.”

Across the country, RNC regional teams have hit the ground running in battleground states, sending dozens of emails assailing Democrats who support impeachment in competitive House districts. Starting Sunday, the party will begin a $10 million ad assault on digital and television screens in 25 to 50 House districts with a focus on “exposing the Democrats’ impeachment charade,” according to a press release.

RNC spokesman Mike Reed said $500,000 was raised in 24 hours after a single email blast against Democrat Elissa Slotkin in Michigan’s 8th district.

“Our supporters are fired up,” he said.

Despite the swelling coffers, news that House Democrats would officially move to impeach President Trump has been met with “frustration” in the White House, a senior official there told The Post.

“There’s legit things we were making progress on and now you’ve just kind of blown it up,” the official said.