Here's a simple example of how averaging works. Assume that F, a single farmer, sold some of his farm machinery and more corn than usual, and all of this happened in 2015. F's 2015 taxable income is $50,000, of which $30,000 is from his farming business. F had no taxable income in 2014, $5,000 of taxable income in 2013, and $10,000 of taxable income in 2012. Since F's income is higher than in previous years, F elects to average $30,000 of his 2015 income over the three base years (2014, 2013, and 2012). F figures his 2015 tax in this manner:
- He subtracts the elected portion of his current year's taxable farm income ("elected farm income") from his total taxable income. Thus, in 2015, F subtracts the elected farm income ($30,000) from his taxable income of $50,000. F's remaining 2015 taxable income is $20,000.
- He figures the tax on the amount in (1) using the tax tables or tax rate schedules for the current year (in this case, 2015). Under the 2015 tax tables, the tax on $20,000 is $2,543.
- For each of the three base years (2014, 2013, and 2012), F adds one-third of the current year's (2015) elected farm income ($10,000 each year) to his taxable income for that year and figures the tax on that amount. Then, in each of the three base years (2014, 2013, and 2012), F subtracts his actual tax from the tax computed for the base year.