RBS, which has not made an annual profit since 2007, booked 6.96 billion pounds of losses for 2016, against a 1.98 billion pound loss in the same period a year earlier.

Once, albeit briefly, the world's largest bank by assets, RBS is in the midst of a vast, multi-year restructuring which includes asset sales, job cuts and wading through a series of legal scandals.

"This is a strong core bank getting masked by all the sins of the past," Chief Executive Ross McEwan said on a conference call with reporters.

RBS said 2017 will probably be the final year it makes a loss as it moves nearer to closing the darkest chapter in its 290-year history, which has seen it rack up more than 58 billion pounds in losses so far.

The Edinburgh-based lender also announced plans to cut 2 billion pounds of costs over the next four years to help offset the challenge of a low interest rate economy that makes it harder for the bank to make money.

Although RBS did not specify where the cuts would fall they are expected to partly hit its branch network where the lender has already eliminated thousands of roles as more customers bank online.

MISCONDUCT ISSUES

Total income was moderately down, with the jump in losses mainly driven by a 5.9 billion charge of misconduct issues relating to its behaviour in the run up to the 2007-2009 global financial crisis.

RBS took charges to set aside money to cover legal cases in the U.S. where analysts expect it to pay the biggest regulatory penalty in its history for mis-selling U.S. securities backed by toxic mortgage loans.

Analysts have estimated the bank could have to pay the U.S. Department of Justice as much as 9 billion pounds this year.

McEwan said the bank has not begun negotiations with the U.S. government on any settlement.

The shares fell 1.9 percent by 0825 GMT.

RBS was the only British lender to fail the Bank of England's stress test in 2016, a sign of how the bank's future is still being dictated by its past.

In some rare good news for RBS, the British government is pushing to free the bank from an obligation to sell its Williams & Glyn business to try to end a seven-year struggle to meet European Union state aid demands.

The bank will not know if the European Commission has approved the new state aid plan until the fourth quarter of this year at the earliest, RBS Chief Financial Officer Ewen Stevenson told reporters.

The British government, which owns more than 70 percent of RBS, has said it will not resume selling its stake until the bank settles its U.S. fine and resolves its state aid requirements.)

(Reporting By Andrew MacAskill and Lawrence White; Editing by Rachel Armstrong/Keith Weir)

By Andrew MacAskill and Lawrence White