RBS had more than enough shock-absorbing capital set aside to pay the fine, leaving it with £4b of excess capital that it hopes to start returning to investors soon.
The Treasury is also expected to lay out plans to start selling down its remaining 71 per cent stake in the bank in the coming months, acquired when taxpayers bailed out the bank for £45b at the height of the financial crisis.
City analysts and media reports have speculated McEwan could soon leave with two of his top priorities close to being met.
"With the settlement almost complete and a return to dividends in sight, we expect RBS to confirm a successor to current CEO Ross McEwan in the second half of this year," UBS analyst Jason Napier wrote in a note yesterday.
On LBC today McEwan also hinted that RBS could pursue further rounds of branch closures.
Earlier this month the bank unveiled plans to axe 162 branches and 792 jobs, just five months after announcing it would slash 259 branches and 1,003 jobs.
"We'll have to wait until the end of the year to see what... footfall disappears when we move these customers out," he said.