Former Subway sandwich spokesman Jared Fogle appears to admit in a text messsage to paying a 16-year-old girl $100 for sex, it was reported Friday.

The Business Insider website says the FBI subpoenaed an affidavit containing texts between Fogle and a former female Subway franchisee who apparently were in a relationship.

In several messages, he allegedly asks the woman to advertise herself on Craigslist for sex with other men so he could watch.

She responds to one text saying, “Is this the same website you found that 16-year-old girl that you f–ked. . . .I still can’t believe you only paid $100 for her.’’

Fogle responds, “It was amazing,’’ the story says.

BI’s source is an unidentified lawyer the woman hired after she complained to Subway, which allegedly did nothing.

Business Insider says it “independently verified’’ the authenticity of the affadavit. The age of consent in Indiana, where Fogle lives, is 16.

The franchisee also claims that Fogle asked her to set up a meeting with her underage cousin.

It was reported earlier that a Florida woman who worked as a TV journalist tipped the feds that Fogle told her he thought “middle school girls are hot.’’

Subway suspended its relationship with Fogle last month after authorities raided his home in Indiana.