Running for president is good for Donald Trump’s bottom line.

The real estate mogul jacked up the rent on his own presidential campaign, billing it more than four times the previous cost for its use of Trump Tower, once the dough wasn’t coming out of his own pocket, according to a new report.

In March, the campaign shelled out $35,458, but by July, the rent ballooned to $169,758, according to the Huffington Post.

The reason for the difference, the site claims, is that in March the mogul was mainly self-funding his primary presidential campaign.

But in July, the Trump campaign transitioned to using outside funds to finance the campaign.

And during that period, employees and consultants on the Trump campaign declined — going from 197 in March to 172 in July, according to the report.

“If I was a donor, I’d want answers,” a Republican National Committee member told the Huffington Post. “If they don’t have any more staff, and they’re paying five times more? That’s the kind of stuff I’d read and try to make an (attack) ad out of it.”

In 2000, Trump boasted that he would find a way to make an Oval Office bid profitable.

“It’s very possible that I could be the first presidential candidate to run and make money on it,” he said in 2000.

According to one estimate, 9 percent of Trump campaign spending ends up in companies owned by the Trump family, with the largest expenditure being $5.6 million to pay for the tycoon’s private jet.

Federal Election Commission records show the Trump campaign made a $423,371 payment in May for “facility rental” and “catering” that month.

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