On February 27, 1968, the Thesauriër der Koningin
(the Queen's Treasurer) informed a government commission that Juliana's assets amounted to 'only' eighty million guilders. There is a calculater which calculates the amound in todays "purchasing power": https://iisg.amsterdam/en/research/p.../calculate.php
A private fortune of 80 million guilders from the year 1968 has a "purchasing power" 195 million Euro (225 million US Dollar) in the year 2020.
According the Thesauriër the vast majority of Queen Juliana's fortune was loss-making or unprofitable. The securities portfolio generated income, in those years about 1.5 million guilders per year (3,6 million Euro in today's money).
Immovable property included Soestdijk Palace, the mansion at the Lange Voorhout in The Hague, a number of properties near Soestdijk and in The Hague (including the mansion Noordeinde 66), the estate De Horsten and a number of properties in the Veluwe, but because of high functional costs Juliana had been digging in her private assets for some 2,5 million guilders annually, for several years (6 millon Euro in today's money).
For an example, in the period 1961-1966 Queen Juliana had to use more than ten million guilders (24,4 million Euro in today's money) from her private fortune because she (on her own initiative) raised the salaries of her staff to the level of civil servants. As a result, the Queen had to transfer 1,4 million guilders (3,4 million Euro in today's money) from her private purse, for years.
On July 23, 1966, the Cabinet introduced a Bill to increase the annual allowance to the Queen from 2,5 to 5.2 million guilders (12,7 million Euro in today's money). According to the Cabinet, the Queen actually needed six million guilders, but the ministers thought she could pay an average amount of 800.000 guilders from the income she generated from the Crown Domains. The proposed amount included 450.000 guilders for maintenance and personnel of Soestdijk Palace that was privately owned by Queen Juliana.
The proposals were received very critically in the Dutch media. The media pointed to foreign reports that Juliana is said to be "one of the richest women in the world".
At the end of 1970, Soestdijk Palace and the associated domain were sold by Queen Juliana to the State of the Netherlands for an amount of exactly 4.2 million guilders (10,2 million Euro in today's money). The reason was that the annual maintenance costs would put too much pressure on Queen Juliana's equities. She managed to ensure that she and her husband were allowed to continue living in the palace until their death.
The formerly Stadhouderly Court in Leeuwarden was sold by Juliana in 1971 to the municipality of Leeuwarden for an amount of 285,000 guilders (1,5 million Euro in today's money).
In 1983 then Princess Juliana sold the mansion at Noordeinde 66 in The Hague for 750,000 guilders (1,5 million Euro in today's money) to her grandson Willem-Alexander.
In the 1980s, the State of the Netherlands paid Juliana about twenty million guilders (46 million Euro in today's worth) for the acquisition of privately owned museal contents of three palaces (Het Loo, Noordeinde and Huis ten Bosch).
At the beginning of 1990, she sold the mansion at the Lange Voorhout for 4.5 million guilders (8,2 million Euro in today's worth) to the municipality of The Hague.