Zimbabwe is still recovering from years of economic collapse attributed mainly to government policies under Mugabe, who has run the country since independence in 1980.
"I am earning USD 4,000 (2,900 euros) just now, because of the hard times. This is what we decided on, that we should recognise the hard times at the moment," Mugabe said in a BBC interview at the weekend, according to excerpts published in state media.
The report did not say how much the 90-year-old president, who favours designer suits and Rolex watches, might receive in allowances or what he earns outside government.
Mugabe has interests in farming among known business entities under his name.
Also Read
The president built a plush private mansion on the outskirts of the capital Harare, reportedly worth more than USD 10 million.
Last month the veteran leader gave a USD 100,000 gift to his daughter and son-in-law at their wedding, which he hosted at his mansion with more than 4,000 guests.
The head of the public health insurance fund was a top earner, with a gross monthly salary of USD 535,499, while the Zimbabwe Broadcasting Corporation boss took home USD 37,050 a month.
The country in 2009 ditched the worthless Zimbabwe dollar currency in favour of the US dollar and a raft other regional currencies.