The countdown has officially begun for Donald Trump to pay the massive fine imposed on him by an American court in a civil fraud case.

The judge overseeing the civil fraud trial of former U.S. President Donald Trump concluded his ruling in the case on Friday, meaning Trump now has 30 days to pay fines totaling $454 million or obtain a bond for the full amount, according to the Associated Press.

The amount includes a fine of $354 million plus nearly $100 million in interest before the ruling was issued.

A spokesperson for Attorney General Letitia James confirmed to the Associated Press that interest of about $112,000 per day will accrue on Trump for every day he does not make the payment.

This interest is larger than Trump had anticipated, as it was previously estimated at about $88,000 per day.

The judge on Thursday rejected attempts by Trump's lawyers to delay the start of the penalty.

The final ruling also means that Trump has 30 days to appeal the judgment, according to New York law.

Trump and his sons were accused of inflating the value of "The Trump Organization" assets, including towers, luxury hotels, and golf courses, to obtain bank loans on different terms, and lowering their values to get insurance contracts at lower amounts.

Some of these assets, such as the "Trump Tower" on Fifth Avenue in Manhattan, are considered a symbol of the businessman's success who entered politics promoting his image as a successful real estate developer.

The former Republican president has always denied these accusations, condemning a judiciary controlled by Democrats and calling his trial "worthy of a banana republic."

On February 16, the legal battle between James and Trump ended in a Manhattan courtroom after the New York City judge clarified the penalties Trump, two of his sons, and the former CFO of The Trump Organization would face for years of violations.

Judge Arthur Engoron said, "The defendants did not commit murder or arson. They did not rob a bank at gunpoint. Yet, the defendant is unable to admit the wrongdoing he committed."

Trump and his lawyers, who spent months defending the value of the former president's business, described the ruling as a "gross miscarriage of justice."

Trump's lawyer, Christopher Kise, said he is preparing to appeal in a statement to Newsweek magazine.

He added, "The case raises serious legal and constitutional questions regarding allegations of 'fraud' without any actual fraud."