Married couples in Iowa who both have income will usually find that one of the “separate” filing statuses is the best to use on their Iowa taxes, rather than filing a joint Iowa return. The reason is, Iowa has just one tax bracket regardless of filing status, so two people filing a joint return will be taxed on their combined incomes at a high point in Iowa’s highly progressive tax bracket. Filing separate returns allows each spouse to be taxed at a lower point in the tax bracket.

Iowa offers two “separate” filing statuses — married filing separately on a combined return, and married filing separately on separate returns. A more thorough discussion of the differences between the two statuses is for another blog post on another day. The main point I want to make today is: under either of the separate filing statuses, you must allocate itemized deductions based on income.

Allocating Deductions

When a married couple files separately on their Iowa returns — either on a combined return or on a completely separate return — the couple MUST share itemized deductions based on income. This is true even if one spouse made 100% of the payments from their own separate funds.

Example

John and Jane are married in Iowa and file their Iowa taxes as married filing separately. John’s income is $50,000. Jane’s income is $25,000. On the Iowa return, John must claim 2/3 of the itemized deductions ($50,000 income/$75,000 total income of the couple) and Jane must claim 1/3 of the itemized deductions, regardless of who actually made the payments or whether the payments relate to separately held property.

This is a different concept from the married filing separately filing status on federal taxes. On a “separate” federal 1040, the itemized deductions generally go to whoever actually made the payment.

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