Illinois Alimony Calculator

Get an estimate of future spousal support payments based on the Illinois formula.

How is Alimony Calculated in Illinois?

calculate illinois alimony paymentsIn cases where couples earn less than a combined $250,000 annually, a standard formula can be applied to determine how much is expected to be paid in alimony. Even in cases outside of the ordinary, the formula may be used as a guideline.

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Estimate Alimony Payments*

*Please remember these are estimates based on your inputs without considering the division of assets or debts. The purpose of this calculator is to give an idea of what spousal support payments may look like depending on the circumstances of your case.
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Here is a rough estimate of how it will be calculated: (30% of the payer's gross income) – (20% of the payee's income) = the yearly maintenance support. However, that support cannot cause one spouse to earn more than 40% of the couple's combined income.

The length is determined in large part by the length of the marriage:

  • (Marriage 0-5 years) x (20%)
  • (Marriage 5-10 years) x (40%)
  • (Marriage 10-15 years) x (60%)
  • (Marriage 15-20 years) x (80%)
  • Marriages of 20+ years – the court will either order permanent spousal maintenance or maintenance for the length of the marriage.

So, for example, spousal support awarded to someone in a 10-year marriage would be paid for six years.

Illinois Spousal Maintenance Calculation Examples

Payer's Monthly Income Receiver's Monthly Income Estimated Monthly Maintenance Award
$3,000 $1,000 $700
$4,000 $1,000 $1,000
$5,000 $1,000 $1,300
$6,000 $1,000 $1,600
$7,000 $1,000 $1,900
$8,000 $1,000 $2,200

* Note: The above table does not reflect maintenance duration.

What else is taken into consideration?

The legal basis of spousal maintenance is rooted in an effort to grant a measure of independence to a financially dependent spouse. A typical example of this is when one spouse has given up their career to be a homemaker in order to support the other in chasing a higher career level. Though the formula can be used as a guide to spousal support, the court uses a number of factors to determine how maintenance is specifically paid out:

  1. The income and properties held by each spouse, taking into account the property division process
  2. The needs of each spouse
  3. The age, income, job skills, employability, and physical health of each spouse
  4. The length of the marriage
  5. Earning capacity and career potential of each spouse
  6. Tax consequences as a result of the property division aspect of the divorce
  7. Reductions to career and earning potential as a result of one spouse delaying or stopping their career advancement as a result of marriage or childcare
  8. Any agreements made by either spouse in a prenuptial or post-nuptial agreement
  9. Contribution by one party to the increased earning power of the other
  10. The time required by the spouse seeking maintenance to secure job training or education necessary to advance their career and employment prospects
  11. The couple’s standard of living during the marriage
  12. Any other factor the court considers to be “just and equitable”
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