The integration of the core banking solution platform would take slightly longer time as the merged entity had an older version of this platform, he said.
"We will complete Finacle (CBS) integration and ... all surrounding technologies latest by March 2021... one bank will be migrated by December and shifting of second will be over before March," he said.
With the merger, the bank now has about 11,000 branches, more than 13,000 ATMs, 100,000 employees and a business mix of over Rs 18 trillion. Total domestic business of PNB at the end of March 2020 stood Rs 11.81 trillion.
However balance-sheet wise, Rao said that Oriental Bank of Commerce and United Bank of India booked losses in the fourth quarter ended March 31, 2020.
The losses were mainly due to provision against bad loans, he said, without giving numbers as they have not been made public.
On the outlook for the current fiscal, Rao said PNB will earn moderate profit in the current fiscal, aided by treasury income and core banking activities.
For the fourth quarter ended March, the bank posted a net loss of Rs 697.20 crore. However, after a gap of two years, the Nirav Modi fraud hit bank posted profit of Rs 363.34 crore in 2019-20.
He also said that the bank has scaled down its loan growth target to 6 per cent for the current fiscal due to the Covid-19 crisis.
However, he said, the bank has a treasury advantage due to reduction in interest rates resulting in Rs 1,000 crore gain in the first quarter of 2020-21.
"We are confident that quarter-on-quarter, we can book moderate profits. We do not like to have higher profit because we want to strengthen the balance-sheet during 2020-21.
"We are very confident that we will be creating a better base for the bank not only for booking moderate profit in 2020-21 but also creating a robust situation for 2021-22," he said.