net worth method

the Government, having concluded that the taxpayer's records are inadequate as a basis for determining income tax liability, attempts to establish an 'opening net worth' or total net value of the taxpayer's assets at the beginning of a given year. It then proves increases in the taxpayer's net worth for each succeeding year during the period under examination and calculates the difference between the adjusted net values of the taxpayer's assets at the beginning and end of each of the years involved. The taxpayer's nondeductible expenditures, including living expenses, are added to these increases, and if the resulting figure for any year is substantially greater than the taxable income reported by the taxpayer for that year, the Government claims the excess represents unreported taxable income.

Defined by the Supreme Court in - Holland v. United States, 348 U.S. 121 (1954).