The group said 59,000 of its key workers will receive £1,000 in cash in June and £500 will be awarded in shares under its employee share scheme after three years.
The payout - costing BT £110 million - is equivalent to around 5% of average employee salary, according to the group.
Philip Jansen BT chief executive said: "Our frontline colleagues and key workers have been true heroes, keeping everyone connected in this most difficult time.
"BT has delivered for our customers through the dedication of all our people, but inevitably the pandemic hit our financial performance, like that of most companies.
"In this context, we have to prioritise and I am determined that we will do everything in our power to reward our frontline colleagues."
The group has been playing an important role during the pandemic, helping keep Britain connected as many people have been working from home.
Previously, BT awarded its entire 100,000 workforce shares worth £500 for each employee last June to reward their efforts during the crisis.
The latest bonus comes despite a pay freeze across the company and amid an ongoing dispute with trade unions over BT's overhaul plans.
Employee members of the Communication Workers Union (CWU) are voting over industrial action in a row over jobs, which threatens the first national strike at BT in more than 30 years.
The dispute over compulsory redundancies and the closure of sites, has been running for more than a year.