BRASILIA, March 5 (Reuters) - The Brazilian government expects IDB Invest, the private sector arm of the Inter-American Development Bank (IDB), to undergo a capital increase of $3.5 billion, a top official at the country's Planning Ministry said on Tuesday.

Brazil would contribute $434 million as part of the move, to be paid in seven annual installments starting in 2025, according to the ministry's International Affairs and Development Secretary, Renata Amaral.

The IDB and IDB Invest are scheduled to hold their annual board meetings from March 6 to 10 in the Dominican Republic. (Reporting by Marcela Ayres; editing by Gabriel Araujo)