Writer: Steve Dinnen
The bracket calculation, along with deduction allowances for filing status (single, or married filing jointly, separately, etc.) and the personal exemption allowance, is adjusted every year to allow for inflation. The practice debuted in 1981 at the federal level, and gradually has spread to most states. Iowa adjusts for the brackets, of which it has nine, and for the standard deduction, but not for the personal exemption.
At the federal level – it has seven brackets – the lowest bracket of 10% applies to taxable income below $9,950 single, or $19,900 married filing jointly. This year the lowest brackets are below $9,875 single/$19,550 married filing jointly.
Iowa’s lowest rate for 2021 is 0.33%, for income below $1,676. This year’s lowest rate applies to taxable income below $1,666.
The two highest federal rates, 35% and 37%, edge up next year to $209,475/$418,850, and $523,600/$628,300. Iowa’s top rate of 8.53% (seventh-highest in the nation, for what it’s worth) starts at $75,420 next year. It is $74,970 this year.