Also, the oil-to-technology conglomerate has deferred annual cash bonus and performance-linked incentives that are normally paid in the first quarter, according to an employee communique.
The nationwide lockdown that began on March 25 had led to evaporation of demand as factories shut down, offices closed, air flights suspended, trains stopped and restrictions on the movement of people and goods placed.
Reliance's hydrocarbon business was adversely impacted due to a reduction in demand for refined products and petrochemicals.
The company's different vertical heads wrote to their employees about the salary cut decision.
"This has, of course, put pressure on our hydrocarbons business necessitating optimisation and cost reduction across all fronts," it said. "The situation demands that we maintain a razor-sharp focus on operating costs and fixed costs and all of us need to contribute to making this happen."
While Ambani will forgo his entire Rs 15 crore compensation, Reliance board of directors including executive directors, Executive Committee (EC) members, and senior leaders will forgo 30 to 50 per cent of their compensation.
Employees with compensation of less than Rs 15 lakh will have no reduction in compensation but those earning higher than that could see a 10 per cent reduction in fixed pay.
Ambani draws Rs 15 crore in annual compensation for being chairman and managing director of India's largest company. His salary has remained unchanged since 2008-09, forgoing over Rs 24 crore per annum.
"We will closely monitor the economic and business environment, re-evaluate our response to the situation on a continuous basis and strive to improve the earning capacity of our business," it said.
The lockdown period, the company communique said, has also provided several opportunities to reorganise and digitalise business processes to generate significant improvements in productivity, efficiency and costs.
"Together, we will embrace these opportunities and work towards restoring our compensation levels to normalcy," it said.
The communication said the firm's various initiatives on all fronts will help it strengthen organisation to become more resilient in coping with business uncertainties in a volatile and uncertain world. They will help us navigate through these challenging times with agility and emerge as industry leaders and as accretors of top talent. ANZ MKJ