Maintenance Calculator Illinois

Estimate potential spousal maintenance (alimony) in Illinois based on the statutory guidelines. This maintenance calculator Illinois provides an estimate for divorces finalized after January 1, 2019.

Calculate Maintenance

Maintenance Duration Factors (Marriages < 20 Years)

Length of Marriage (Years)	Multiplier Factor	Resulting Duration (Years)
0 – less than 5	0.20	Length x 0.20
5 – less than 10	0.40	Length x 0.40
10 – less than 15	0.60	Length x 0.60
15 – less than 20	0.80	Length x 0.80

Table illustrating the statutory multipliers used to determine the duration of maintenance payments based on the length of the marriage in Illinois for marriages under 20 years. For marriages 20 years or longer, duration may be equal to the marriage length or indefinite.

What is the Maintenance Calculator Illinois?

A maintenance calculator Illinois is a tool designed to estimate the amount and duration of spousal maintenance (formerly known as alimony) that might be awarded in an Illinois divorce case. It uses the statutory formula provided in the Illinois Marriage and Dissolution of Marriage Act (750 ILCS 5/504) for divorces finalized after January 1, 2019. The calculator takes into account the net incomes of both spouses and the length of the marriage to provide an estimate based on the guidelines.

This maintenance calculator Illinois is intended for informational and educational purposes only and is not a substitute for legal advice from a qualified attorney. The actual amount and duration of maintenance can vary based on numerous factors considered by the court.

Anyone going through or considering a divorce in Illinois where spousal support is a potential issue can use this calculator to get a preliminary idea of the guideline maintenance. Common misconceptions are that the guideline amount is always awarded, but judges have discretion to deviate based on specific circumstances.

Illinois Maintenance Formula and Mathematical Explanation

For marriages under 20 years and divorces finalized after January 1, 2019, the Illinois guideline formula for calculating the annual maintenance amount is:

Annual Maintenance = (33.3% of Payor’s Net Annual Income) – (25% of Recipient’s Net Annual Income)

However, there’s a significant limitation: the recipient’s net annual income plus the calculated maintenance amount cannot exceed 40% of the parties’ combined net annual income. If it does, the maintenance amount is reduced accordingly.

Steps:

1. Calculate 33.3% of the payor’s net annual income.
2. Calculate 25% of the recipient’s net annual income.
3. Subtract the result from step 2 from the result from step 1. This is the initial guideline maintenance.
4. Calculate the combined net annual income of both parties.
5. Calculate 40% of the combined net annual income (the cap).
6. Add the initial guideline maintenance to the recipient’s net annual income.
7. If the sum from step 6 exceeds the cap from step 5, the maintenance amount is reduced so that the recipient’s income plus maintenance equals the cap.

The duration of maintenance for marriages under 20 years is determined by multiplying the length of the marriage by a statutory factor (see table above).

Variables Table:

Variable	Meaning	Unit	Typical Range
Payor’s Net Income	Annual income of the spouse likely paying maintenance, after taxes and deductions	$	$20,000 – $500,000+
Recipient’s Net Income	Annual income of the spouse likely receiving maintenance, after taxes and deductions	$	$0 – $300,000+
Length of Marriage	Duration of the marriage from date of marriage to date of filing/judgment	Years	0 – 40+

Practical Examples (Real-World Use Cases)

Example 1: 10-Year Marriage

Suppose the payor has a net annual income of $100,000 and the payee has a net annual income of $20,000, and the marriage lasted 10 years.

• 33.3% of $100,000 = $33,300
• 25% of $20,000 = $5,000
• Initial Maintenance = $33,300 – $5,000 = $28,300 per year
• Combined Net Income = $100,000 + $20,000 = $120,000
• 40% Cap = 0.40 * $120,000 = $48,000
• Recipient’s Income + Initial Maintenance = $20,000 + $28,300 = $48,300
• Since $48,300 > $48,000, maintenance is capped. Final Maintenance = $48,000 – $20,000 = $28,000 per year.
• Duration (10 years marriage) = 10 * 0.60 = 6 years

The estimated annual maintenance would be $28,000 for 6 years.

Example 2: 4-Year Marriage

Payor’s net income: $70,000, Payee’s net income: $30,000, Marriage length: 4 years.

• 33.3% of $70,000 = $23,310
• 25% of $30,000 = $7,500
• Initial Maintenance = $23,310 – $7,500 = $15,810 per year
• Combined Net Income = $70,000 + $30,000 = $100,000
• 40% Cap = 0.40 * $100,000 = $40,000
• Recipient’s Income + Initial Maintenance = $30,000 + $15,810 = $45,810
• Since $45,810 > $40,000, maintenance is capped. Final Maintenance = $40,000 – $30,000 = $10,000 per year.
• Duration (4 years marriage) = 4 * 0.20 = 0.8 years (approx. 9.6 months)

The estimated annual maintenance would be $10,000 for 0.8 years using this maintenance calculator Illinois.

How to Use This Maintenance Calculator Illinois

1. Enter Payor’s Net Annual Income: Input the net annual income (after taxes and standard deductions) of the spouse who is likely to pay maintenance.
2. Enter Recipient’s Net Annual Income: Input the net annual income of the spouse who is likely to receive maintenance.
3. Enter Length of Marriage: Input the duration of the marriage in years. You can use decimals for partial years (e.g., 7.5 for seven and a half years).
4. Click Calculate: The calculator will automatically display the estimated annual and monthly maintenance, the duration, and intermediate calculations, including the 40% cap check.
5. Review Results: The “Primary Result” shows the estimated monthly maintenance. The “Intermediate Results” section breaks down the calculation.

The results provide a guideline estimate. An Illinois court will consider other factors, and the final order may differ. Consult with an attorney to understand how these factors might apply to your specific situation.

Key Factors That Affect Maintenance Calculator Illinois Results

While the maintenance calculator Illinois provides a guideline, the court can deviate based on several factors outlined in 750 ILCS 5/504(a):

• The income and property of each party: Including marital and non-marital property awarded.
• The needs of each party: The reasonable expenses and standard of living.
• The realistic present and future earning capacity of each party: How much each person can earn now and in the future.
• Any impairment of the present and future earning capacity of the party seeking maintenance: Due to domestic duties or forgoing education/career for the marriage.
• The time necessary for the party seeking maintenance to acquire education/training: To become self-supporting.
• The standard of living established during the marriage: The lifestyle the couple was accustomed to.
• The duration of the marriage: Longer marriages may lead to longer or indefinite maintenance.
• The age, health, station, occupation, amount and sources of income, vocational skills, employability, estate, liabilities, and needs of each party.
• All sources of public and private income including, without limitation, disability and retirement income.
• Any valid agreement of the parties (e.g., prenuptial or postnuptial agreements).
• Any other factor that the court expressly finds to be just and equitable.

The maintenance calculator Illinois does not account for these discretionary factors, only the guideline formula based on net incomes and marriage duration. For a full understanding, see our guide on Illinois divorce law maintenance.

Frequently Asked Questions (FAQ)

What is “net income” for the Illinois maintenance calculation?

Net income under the Illinois statute is gross income minus standardized tax amounts (federal, state, FICA, Medicare) and certain other deductions. It’s best to consult the statute or an attorney for the precise definition, as it can differ from take-home pay.

Is the maintenance calculator Illinois amount always awarded?

No. The calculator provides a guideline amount. A judge can deviate from the guideline if they find the guideline amount would be inappropriate after considering the factors listed in the statute.

Does the maintenance calculator Illinois apply if incomes are very high?

The guideline formula (33.3%/25%) generally applies to combined gross incomes up to $500,000 per year. For incomes above this, the court may use the guidelines or decide on a case-by-case basis considering the statutory factors.

What if the marriage was 20 years or longer?

For marriages of 20 years or more, the court may order maintenance for a period equal to the length of the marriage or for an indefinite term. The duration factors in the table above do not apply.

Is maintenance taxable in Illinois?

For divorce or separation agreements executed after December 31, 2018, maintenance payments are NOT deductible by the payor and are NOT taxable income to the recipient for federal income tax purposes. Illinois state tax law generally follows federal law in this regard.

Can maintenance be modified after the divorce?

Yes, maintenance can generally be modified upon a substantial change in circumstances, unless the parties agreed in writing that it would be non-modifiable.

How does child support affect maintenance?

If child support is also being paid, the calculation and interplay between child support and maintenance can be complex. The court considers both. See our Illinois child support calculator for more.

What if one spouse is voluntarily unemployed or underemployed?

The court can impute income to a spouse who is voluntarily unemployed or underemployed to calculate maintenance based on their potential earning capacity.