Illinois courts award four distinct types of spousal maintenance under 750 ILCS 5/504: fixed-term maintenance with a specific end date, indefinite maintenance with no termination date, reviewable maintenance subject to court review at a designated time, and reserved maintenance where the court preserves jurisdiction to award support later. The state uses a standardized formula calculating maintenance as 33.3% of the payer's net income minus 25% of the recipient's net income, with the recipient's total income capped at 40% of combined net income. These guidelines apply to couples with combined gross annual income under $500,000.
| Key Facts | Illinois Requirements |
|---|---|
| Filing Fee | $250-$388 (varies by county) |
| Waiting Period | None (no mandatory waiting period) |
| Residency Requirement | 90 days minimum |
| Grounds | No-fault only (irreconcilable differences) |
| Property Division | Equitable distribution |
| Maintenance Formula | 33.3% payer income - 25% recipient income |
| Income Cap for Guidelines | $500,000 combined gross income |
How Illinois Calculates Spousal Maintenance Amounts
Illinois calculates monthly maintenance payments using a precise statutory formula under 750 ILCS 5/504(b-1)(1)(A): multiply the payer's net income by 33.3%, then subtract 25% of the recipient's net income. The resulting payment cannot push the recipient's total income above 40% of combined net income. For example, if the payer earns $100,000 net annually and the recipient earns $40,000 net annually, the formula yields $23,300 per year ($1,942 monthly) in maintenance payments.
The maintenance calculation formula applies only when combined gross annual income falls below $500,000 and the payer has no existing maintenance or child support obligations from prior relationships. Courts may deviate from the formula when strict application would be inappropriate, considering factors such as significant disparity in income-producing assets or unusual circumstances affecting either party's financial situation.
Net Income Determination
Illinois defines net income for maintenance purposes differently than gross income shown on tax returns. Courts start with gross income from all sources, then subtract federal and state income taxes, Social Security contributions, Medicare taxes, mandatory retirement contributions, health insurance premiums for the payor alone, and prior maintenance obligations. The resulting net figure forms the basis for the 33.3% and 25% calculations that determine maintenance amounts.
Fixed-Term Maintenance in Illinois
Fixed-term maintenance provides spousal support for a specific, predetermined period with a definite end date established at the time of the divorce decree. Under 750 ILCS 5/504(b-4.5)(1), courts designate the exact termination date, creating certainty for both parties regarding the duration of payments. This type of maintenance typically applies to shorter marriages or situations where the recipient spouse needs temporary support while gaining economic independence.
Illinois ties fixed-term maintenance duration directly to marriage length using statutory multipliers under 750 ILCS 5/504(b-1)(1)(B). A marriage of 5 years or less yields maintenance lasting 20% of the marriage length, so a 4-year marriage produces approximately 9.6 months of support. Marriages between 5 and 10 years use a 40% multiplier, meaning an 8-year marriage generates roughly 3.2 years of maintenance.
| Marriage Duration | Duration Multiplier | Example |
|---|---|---|
| 0-5 years | 20% of marriage length | 5-year marriage = 1 year maintenance |
| 5-10 years | 40% of marriage length | 8-year marriage = 3.2 years maintenance |
| 10-15 years | 60% of marriage length | 12-year marriage = 7.2 years maintenance |
| 15-20 years | 80% of marriage length | 18-year marriage = 14.4 years maintenance |
| 20+ years | Equal to marriage length or indefinite | Court discretion applies |
Fixed-term maintenance terminates automatically on the designated date unless modified by court order before expiration. The recipient cannot petition for extension after the termination date passes, making it essential to seek modification well before the fixed term ends if circumstances warrant continued support.
Indefinite Maintenance in Illinois
Indefinite maintenance provides ongoing spousal support with no predetermined termination date, continuing until modified or terminated by court order under 750 ILCS 5/504(b-4.5)(1). Courts typically award indefinite maintenance for marriages lasting 20 years or longer, or when the recipient spouse is unemployable due to age, disability, or lack of marketable skills. This category replaced the older "permanent maintenance" terminology following 2019 statutory amendments.
Indefinite maintenance remains appropriate when the recipient spouse cannot reasonably achieve self-sufficiency regardless of time allowed for education or training. Courts evaluate whether a significant income disparity will persist even if the recipient maximizes earning potential, considering factors such as age at divorce (recipients over 55 face reduced employment prospects), chronic health conditions affecting work capacity, and years spent as a homemaker without developing career skills.
The statute provides specific guidance for marriages exceeding 20 years: courts may award maintenance for a period equal to the length of the marriage or indefinitely, based on the particular circumstances of each case. Unlike fixed-term maintenance, indefinite awards require no automatic review date, though either party may petition for modification upon showing a substantial change in circumstances under 750 ILCS 5/510.
Reviewable Maintenance in Illinois
Reviewable maintenance combines elements of both fixed-term and indefinite support by establishing a specific review date when parties must return to court for evaluation. Under 750 ILCS 5/504(b-4.5)(1), the court designates both the term length and explicitly states that the maintenance is subject to review. This structure encourages recipient spouses to pursue education or employment while preserving judicial oversight to assess progress toward self-sufficiency.
At the review hearing, courts reassess whether maintenance should continue, increase, decrease, or terminate based on changed circumstances. Judges evaluate the recipient's efforts toward economic independence, changes in either party's income or health, and whether original assumptions about the recipient's earning potential proved accurate. The reviewing court may extend maintenance for another fixed term, convert it to indefinite maintenance, establish another review date, or terminate the obligation entirely.
Reviewable maintenance proves particularly useful for recipients completing degree programs or professional licensing requirements. For example, a spouse returning to school to complete a nursing degree might receive reviewable maintenance for 4 years with a review scheduled after graduation, allowing the court to assess whether employment income has materialized as anticipated.
Reserved Maintenance in Illinois
Reserved maintenance occurs when the court declines to award maintenance at the time of divorce but expressly preserves jurisdiction to award support in the future. Under 750 ILCS 5/504(b-4.5)(1), the court must specifically state that maintenance is reserved rather than denied, a critical distinction affecting the petitioning spouse's future rights. Denial of maintenance typically bars future requests, while reservation keeps the courthouse door open.
Courts reserve maintenance when current circumstances do not warrant an award but future developments might create genuine need. Common scenarios include divorces where both spouses currently earn comparable incomes but one spouse's health condition may worsen, or situations where a business owned by one spouse has uncertain future value. Reserved maintenance provides flexibility without requiring payments when no current need exists.
The party seeking an initial maintenance award after reservation must demonstrate a substantial change in circumstances since the divorce, the same standard applied to modifications of existing awards. Courts consider whether the change was foreseeable at divorce and whether reserving maintenance was the appropriate remedy given information available at that time.
Temporary Maintenance During Divorce Proceedings
Temporary maintenance provides financial support during the pendency of divorce proceedings under 750 ILCS 5/501, ensuring the dependent spouse can meet basic needs before final judgment. Courts may order temporary support immediately upon filing the divorce petition if circumstances warrant immediate relief. These orders remain effective until the court enters final judgment, at which point permanent maintenance provisions take effect.
Illinois courts require both parties to file a statewide financial affidavit supported by documentary evidence including income tax returns, pay stubs, and banking statements when seeking temporary maintenance. The affidavit details income, expenses, assets, and debts, allowing the court to assess genuine financial need and ability to pay. This financial disclosure remains confidential between the parties and the judge, not becoming part of the public court file.
Temporary maintenance may count toward the duration of permanent maintenance in the court's discretion under 750 ILCS 5/504(b-1)(B)(1.5). If divorce proceedings last 18 months and the court awards 4 years of fixed-term maintenance at final judgment, the judge may credit those 18 months against the total duration, resulting in 2.5 years of remaining post-judgment maintenance. Courts consider the amount and duration of temporary support when structuring final maintenance awards.
Factors Illinois Courts Consider When Awarding Maintenance
Illinois courts analyze 14 statutory factors under 750 ILCS 5/504(a) before awarding spousal maintenance, weighing each element according to the specific circumstances of the marriage. The analysis begins with each spouse's income and property, including assets received through the property division. Courts examine both current earnings and realistic future earning capacity, considering whether either spouse diminished career prospects by prioritizing homemaking or childcare responsibilities.
The standard of living established during marriage provides a benchmark for determining appropriate maintenance, though courts recognize that two households cost more to maintain than one. Duration of marriage significantly influences both the amount and length of maintenance, with longer marriages correlating to more substantial awards. Physical and emotional health of both parties affects earning capacity assessments and the feasibility of employment for the recipient.
Courts also consider any valid agreement between the parties regarding maintenance, including prenuptial or postnuptial agreements waiving or limiting support rights. Under the Illinois Uniform Premarital Agreement Act (750 ILCS 10), parties may waive maintenance in a prenuptial agreement unless enforcement would cause undue hardship due to unforeseen circumstances at the time of divorce.
Modification of Maintenance Awards in Illinois
Illinois permits modification of maintenance orders upon demonstrating a substantial change in circumstances under 750 ILCS 5/510, whether the requesting party seeks an increase, decrease, or termination of support. Either the paying or receiving spouse may file a motion for modification, and courts evaluate the request using the same factors considered in the original maintenance determination. Changes in employment status, income levels, health conditions, or living expenses may constitute grounds for modification.
A substantial change must be ongoing rather than temporary to warrant modification. Job loss alone may not justify reducing maintenance if reemployment appears likely within a reasonable timeframe. Courts examine whether the change was contemplated at the time of the original order and whether the parties expressly addressed future contingencies in their settlement agreement. Legislative changes to maintenance statutes do not constitute a substantial change in circumstances warranting modification of existing orders.
The 2025 amendments to Illinois maintenance law under Public Act 103-967 clarified that maintenance continues to accrue during incarceration of the paying spouse, effective January 1, 2025. Incarcerated payors must petition for modification rather than simply stopping payments, and any unpaid amounts accumulate as arrears. This change overturned prior case law that automatically suspended maintenance during imprisonment.
Termination of Maintenance in Illinois
Spousal maintenance terminates automatically in Illinois upon three statutory triggering events: death of either party, remarriage of the recipient spouse, or the recipient spouse's cohabitation with another person in a conjugal relationship. Under 750 ILCS 5/510(c), the paying spouse bears no further maintenance obligation once any triggering event occurs, and any payments made after termination may be recoverable.
Cohabitation termination requires proof that the recipient resides with a romantic partner in a relationship resembling marriage, not merely shares housing with a roommate for economic reasons. Courts examine factors including the duration of cohabitation, intermingling of finances, joint ownership of property, and whether the parties hold themselves out as married. Illinois courts have found cohabitation where parties maintained separate residences but spent most nights together and combined financial resources.
Maintenance also terminates when the designated end date of a fixed-term award arrives, unless the recipient filed a motion for modification before expiration. Once the termination date passes, the court loses jurisdiction to extend maintenance, making timely action essential for recipients who believe continued support is warranted. Courts cannot retroactively restore maintenance after the statutory termination date.
Tax Treatment of Maintenance Payments
Maintenance payments under divorce agreements executed after December 31, 2018, receive no tax benefit for the payer and create no tax liability for the recipient under federal law. The Tax Cuts and Jobs Act of 2017 eliminated the federal tax deduction for maintenance payments, fundamentally changing the economics of spousal support negotiations. Illinois conforms to federal tax treatment, meaning neither party reports maintenance as income or deduction on state returns.
This tax neutrality affects how parties calculate the true cost and benefit of maintenance during settlement negotiations. Before 2019, higher-earning payors could effectively shift income to lower-bracket recipients, reducing the combined tax burden. Under current law, a $2,000 monthly maintenance payment costs the payor exactly $2,000 after taxes and provides the recipient exactly $2,000 in spending power.
Divorce agreements finalized before January 1, 2019, retain the former tax treatment unless subsequently modified with express adoption of the new rules. Payors under these older agreements may still deduct maintenance payments, and recipients must report them as taxable income. Parties modifying pre-2019 agreements should carefully consider whether to adopt the new tax treatment, as the choice significantly affects both parties' after-tax financial positions.
Illinois Divorce Filing Fees and Court Costs
Illinois divorce filing fees range from $250 to $388 depending on the county where you file, with Cook County charging the highest fee at $388 as of January 2026. DuPage County charges $348 for filing a petition for dissolution of marriage according to the DuPage County Filing Fee Book revised January 12, 2026. The responding spouse pays a separate appearance fee ranging from $181 to $251, with Cook County at $251 and DuPage County at $223.
Parties who cannot afford filing fees may apply for a fee waiver under Illinois Supreme Court Rule 298 if household income falls at or below 125% of federal poverty guidelines, approximately $18,500 annually for a single person in 2026. The court evaluates the applicant's financial resources and may grant full or partial waiver of fees. Service of process adds approximately $60 through the sheriff's office in Cook County, or $50-$100 for private process servers.
Parents with minor children must complete a mandatory parenting education class costing $35-$75 per person before finalizing divorce. Courts may also order mediation at varying costs depending on whether parties use court-connected services or private mediators. Total court costs for an uncontested Illinois divorce typically range from $400-$700, while contested cases involving discovery, expert witnesses, and trial preparation can reach $2,000-$5,000 in court costs alone before attorney fees.
Frequently Asked Questions About Illinois Spousal Maintenance
How long does alimony last in Illinois?
Illinois maintenance duration depends directly on marriage length using statutory multipliers under 750 ILCS 5/504(b-1)(1)(B). Marriages under 5 years yield maintenance lasting 20% of the marriage duration, while marriages of 5-10 years use a 40% multiplier, 10-15 years use 60%, and 15-20 years use 80%. Marriages exceeding 20 years may receive maintenance for the marriage length or indefinitely at court discretion.
Can I get alimony if I cheated in Illinois?
Illinois operates as a pure no-fault divorce state, meaning marital misconduct including adultery does not affect maintenance awards. Courts cannot consider fault when determining whether to award maintenance, how much to award, or how long payments should continue. The only relevant factors are those enumerated in 750 ILCS 5/504(a), focusing on financial circumstances rather than behavior during the marriage.
What is the maintenance formula in Illinois?
The Illinois maintenance formula calculates payments as 33.3% of the payer's net income minus 25% of the recipient's net income, with the recipient's total income capped at 40% of combined net income. This statutory formula under 750 ILCS 5/504(b-1)(1)(A) applies when combined gross annual income falls below $500,000 and the payer has no prior maintenance or child support obligations.
Can maintenance be waived in a prenuptial agreement?
Illinois permits waiver of maintenance rights in prenuptial agreements under the Illinois Uniform Premarital Agreement Act (750 ILCS 10). However, courts may decline to enforce a maintenance waiver if it would cause undue hardship due to circumstances unforeseeable at the time of signing. Both parties should have independent legal counsel review any prenuptial agreement addressing maintenance rights.
When does maintenance automatically terminate?
Maintenance terminates automatically upon death of either party, remarriage of the recipient spouse, or cohabitation by the recipient in a conjugal relationship under 750 ILCS 5/510(c). Fixed-term maintenance also ends on its designated termination date. The paying spouse should promptly notify the court and stop payments when a triggering event occurs.
How do I modify a maintenance order in Illinois?
Either party may petition for modification by demonstrating a substantial change in circumstances under 750 ILCS 5/510, such as significant changes in income, employment, or health status. The requesting party files a motion in the court that issued the original order, pays applicable filing fees (typically $50-$100), and provides evidence supporting the claimed change. Courts consider whether the change is ongoing rather than temporary.
Is maintenance taxable income in Illinois?
Maintenance payments under agreements executed after December 31, 2018, are not taxable income for recipients and not tax-deductible for payors under both federal and Illinois state law. The Tax Cuts and Jobs Act of 2017 eliminated the tax deduction for maintenance, making payments tax-neutral. Only agreements finalized before 2019 that have not been modified retain the former tax treatment.
What happens to maintenance if I go to jail?
Under Public Act 103-967, effective January 1, 2025, maintenance continues to accrue during incarceration of the paying spouse. Payments do not automatically suspend; instead, unpaid amounts accumulate as arrears. Incarcerated payors must petition the court for modification if they seek relief from maintenance obligations during imprisonment.
Can I get maintenance if we were married less than 5 years?
Illinois courts may award maintenance for short marriages when circumstances warrant support, though duration is limited to 20% of the marriage length. A 3-year marriage produces approximately 7 months of maintenance eligibility. Courts consider factors including significant income disparity, one spouse's sacrifice of career advancement, and whether the dependent spouse needs time to become self-sufficient.
What is the difference between maintenance and alimony in Illinois?
Illinois uses the term "maintenance" rather than "alimony" in its statutes and court orders, but both terms describe the same concept: financial support paid from one former spouse to another after divorce. The Illinois Marriage and Dissolution of Marriage Act at 750 ILCS 5/504 governs all aspects of spousal support, regardless of which term parties use informally.