June 30 (Bloomberg) — BNP Paribas SA won a reprieve during final talks to settle a criminal probe into U.S. sanctions violations, giving the bank six months to prepare for a ban on handling certain dollar transactions, according to a person with direct knowledge of the matter.

Authorities in the U.S. rebuffed a last-ditch push by the bank to slash an $8.9 billion penalty, two other people said, asking not to be identified because talks are private. The yearlong ban on dollar clearing could affect specific business lines, such as oil and gas transactions, and certain offices, such as Geneva, where the alleged illegal transactions took place, a person familiar with the terms said last week.

BNP Paribas, France’s largest bank, is poised to plead guilty today in Manhattan federal court, ending years of investigation by accepting a record penalty for violating U.S. sanctions against rogue nations, people familiar with the case have said. The talks with state and federal authorities in the U.S. had drawn warnings from French officials against levying disproportionate fines that could harm their nation’s economy and Europe’s banking system.

BNP Paribas, suspected of hiding about $30 billion in transactions, will probably plead guilty to conspiring to violate the International Emergency Economic Powers Act, a person familiar with the discussions said last week. The Paris-based bank’s board met over the weekend to approve the deal, according to the Financial Times, which reported the delay on the dollar-clearing ban yesterday.

Bertrand Cizeau, a spokesman at BNP Paribas, declined to comment on the final terms.

Justice Department

BNP rose 0.1 percent to 49.44 euros by 10:06 a.m. in Paris trading, valuing the bank at 61.6 billion euros ($84.1 billion). The shares slumped 13 percent this year and closed at a more than nine-month low on June 26.

U.S. authorities aren’t ruling out the possibility of charging individuals in the future, one of the people said. Doing so would probably require additional investigation, such as pushing for more evidence from overseas, that person said.

The probes are being conducted by the Justice Department, U.S. Attorney Preet Bharara, Manhattan District Attorney Cyrus Vance Jr. and Benjamin Lawsky, superintendent of New York’s Department of Financial Services. It involves alleged violations of sanctions against Sudan, Iran and Cuba, mostly dating from 2002 to 2009, with some continuing until 2011, another person familiar with the matter has said. Spokesmen for the Justice Department, Bharara, Vance and Lawsky, all declined to comment.

‘Sanctioned Heavily’

BNP Paribas Chief Executive Officer Jean-Laurent Bonnafe told employees in a letter that the bank’s negotiations were “accelerating” and would conclude “very soon,” according to a June 28 report on the website of French broadcaster i-Tele.

“I want to say clearly: We will be sanctioned heavily,” wrote Bonnafe, 52, adding that “dysfunctions happened and mistakes were made,” according to i-Tele. Carine Lauru, a bank spokeswoman, declined to comment on the report.

The fine will reduce BNP’s Basel 3 common equity Tier 1 ratio, a key measure of financial strength, to 9.5 percent from 10.6 percent at the end of March, estimated Mediobanca Securities analyst Alain Tchibozo, in a note today.

“We also estimate that it will move back above 10 percent by end of 2014, thanks to organic capital generated,” the analyst said. That should put the company back in a position to support its development plans, he said.

U.S. authorities first learned about possible wrongdoing by BNP Paribas around 2007, when the Manhattan District Attorney’s office started investigating. The bank conducted its own probe and about a year later came forward with its findings, people familiar with the matter have said.

Credit Suisse

BNP Paribas will be the second major European bank to plead guilty in the U.S. this year. In May, Credit Suisse Group AG agreed to pay $2.6 billion, the largest penalty in an offshore tax case, after using secret Swiss accounts to help Americans hide money from the Internal Revenue Service. Its main banking unit pleaded guilty.

In a non-sanctions case, JPMorgan Chase & Co. (JPM) agreed in January to pay $1.7 billion to settle U.S. claims that it facilitated imprisoned money manager Bernard Madoff’s Ponzi scheme, the largest in U.S. history. New York-based JPMorgan, the biggest bank in the U.S. by assets, entered into a deferred-prosecution agreement with Bharara’s office, acknowledging oversight lapses related to an account Madoff used to fund his multibillion-dollar fraud.

‘Good News’

In 2012, HSBC Holdings Plc (HSBA) agreed to pay $1.9 billion to resolve allegations of laundering drug money from Mexico and sanctions violations, while it avoided a guilty plea by admitting wrongdoing as part of its accord.

U.S. prosecutors argued that a more severe penalty against BNP Paribas was justified because the misconduct was more egregious and the bank didn’t fully cooperate with the investigation, a person with knowledge of the matter has said.

BNP Paribas’s failure to heed earlier warnings from U.S. authorities “explains the severity” of the fine the French bank is expected to pay, European Commissioner for Financial Services Michel Barnier said today on France Info radio.

A settlement ending the investigation “is good news for all our teams and clients because it will lift the current uncertainties that weigh on our company,” Bonnafe said in the letter, according to i-Tele. “This difficult time we are going through shouldn’t impact our road map.”