Maken and his wife had declared total assets worth around Rs 5.76 crore in the affidavit filed at the time of the Lok Sabha elections last year.
According to details provided by the Congress leader in his latest affidavit submitted to Election Commission, Maken has movable assets worth Rs 2.99 crore while his wife owns property of Rs 1.20 crore.
The value of their immovable assets, which includes a residential property and land in Haryana and Delhi, has increased to Rs 8.14 crore as compared to Rs 2.21 crore last year.
Maken, Congress's Campaign Committee Chief is contesting from the Sadar Bazar Assembly seat.
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The former Union Minister has one case pending against him, same as last year.
The Lok Sabha elections last year were held between April 7 and May 12.
In the latest affidavit, he has mentioned that he has Rs 2.51 lakh cash in hand while his wife has Rs 13,800.