The former state-owned mail service said the board has reviewed the performance of the past 12 months and is likely to make the payment of around £99 million on September 6.
Bosses expect revenues to grow by around 12% a year for the next five years, hitting operating profits of 500 million euros (£426.6 million) and generating free cash flow of more than one billion euros (£850 million).
Adjusted operating profits in the Amsterdam-based division are expected to be around £350 million in the current financial year, the company added.
The plans follow a profit upgrade announced earlier this month, with bosses revealing adjusted operating profits are expected to be around £700 million – up from £325 million a year ago.
Royal Mail announced at the time that it had seen a large surge in customers posting letters and using its services during the most recent lockdown.
The cost of a major restructuring is also expected to come in below expectations, costing around £90 million instead of an original estimate of £140 million.
Royal Mail revenues are set to be £900 million higher than last year – at around £8.6 billion.
New chief executive Simon Thompson, who joined in January after a stint as the boss of the NHS Test and Trace app, will give a fuller update on the group’s performance in May.