Most individuals are familiar with prenuptial agreements. Postnuptial agreements are less commonly discussed. Where a prenuptial agreement is signed before a couple ties the knot, a postnuptial agreement is signed after the parties are already married. Postnuptial agreements are often used to address circumstances or finances that have changed since the wedding. In some cases, they can help prevent divorce.
Many family law attorneys approach postnuptial agreements with caution. For one, if the postnuptial agreement is a worse deal than an actual divorce, an attorney would not recommend it. Furthermore, many couples do not consider the continuation or postponement of a divorce to be a sufficient compromise in exchange for bargaining away their rights. Courts generally exercise more scrutiny for postnuptial than for prenuptial agreements. These agreements are, at their core, contracts.
In every contract, there must be “consideration” for the exchange. The principle behind consideration is that each party to a contract must give up something of value in exchange for what they receive under the contract. When it comes to postnuptial agreements, courts frequently question whether there is enough consideration to support the terms. As a result, it is best practice for a postnuptial agreement to explicitly state the consideration in order to reduce or eliminate future disagreements about it.
Knowing whether a postnuptial agreement in Illinois is right for you comes down to your situation, the stakes for your family, and the protections you need in writing. The five scenarios below cover the most common patterns when a postnuptial agreement may make sense for an Illinois marriage. Each one explains the situation, what the agreement can accomplish, and what to bring to a confidential consultation.
Key Takeaways
- A postnuptial agreement makes sense in Illinois when your situation, the stakes for your family, or your need for protection requires written terms that default state law cannot guarantee.
- Five common scenarios warrant a postnuptial agreement conversation: a significant financial change during the marriage, an older couple deciding to stay married, a new marriage with assets to protect, parents with shared or stepchildren, and a marriage in reconciliation.
- In a reconciliation situation, a postnuptial agreement can preserve the marriage by removing financial uncertainty rather than contemplating divorce. This is the public policy basis for postnuptial agreements in Illinois.
- What to bring to a postnuptial agreement consultation: a current financial picture from both spouses, written goals for protection, and a willingness to engage independent counsel for the agreement to hold up.
- Independent counsel for both spouses is the strongest factor in whether an Illinois postnuptial agreement holds up if it is ever tested in court.
When a Postnuptial Agreement May Be a Good Decision
Nevertheless, for some couples, entering into a postnuptial agreement can be a good decision.
Financial Changes
Let’s say one partner experiences a significant increase in wealth or income during the marriage. That partner may wish to enter into a postnuptial agreement to protect these assets in case the marriage deteriorates. On the other hand, if one spouse has a considerable amount of debt or a history of financial irresponsibility, the other spouse may want an agreement to protect themselves from being responsible for the debts of the other partner in the event of a divorce.
In Illinois, property and income accumulated during the marriage are presumed marital under 750 ILCS 5/503, and a court will divide them in equitable proportions if the marriage ends. A postnuptial agreement can change that default by characterizing specific assets, income streams, or debts as non-marital in writing before any dispute exists. Common Illinois triggers include a business sale, an inheritance during the marriage, a vesting equity grant, a partner buy-in, or one spouse taking on substantial debt.
What to bring to your consultation: a current financial statement from both spouses, documentation of the recent change (sale agreements, grant documents, inheritance records, debt instruments), and any pre-marriage records that establish the original characterization of the affected assets.
Older Couples
If one or both parties are elderly and do not plan on remarrying, it is probably a better deal for them financially to stay married and take advantage of their social security and pension rights than it would be if they instead divorced. Divorces can also be very expensive and not worth fighting if a postnuptial agreement at an older age will sufficiently satisfy the parties.
An Illinois postnuptial agreement for an older couple often coordinates with the estate plan, beneficiary designations, and any prior pension or social security planning. The agreement can address how marital property would be divided if the marriage ends without disturbing the existing retirement and survivor benefits structure. For couples in long marriages, the agreement can also document maintenance treatment in a way that reflects the standard of living established during the marriage.
What to bring to your consultation: the current estate plan, beneficiary designation records, social security and pension statements, a list of any retirement accounts and their current characterization, and any concerns about long-term care or end-of-life planning.
New Marriages
Postnuptial agreements are not just advantageous in the case of a long-term marriage. If the possibility of a divorce arises in the early stages of a marriage, a postnuptial agreement can still be beneficial for some. When a marriage ends after only a few years, a court may award little or no maintenance, though marital property is still divided in just proportions.
If the parties wish to continue with their marriage without worrying about the possibility of future liability for paying maintenance or a large division of assets should a divorce occur in the future, a postnuptial agreement could be recommended. In such a case, a postnuptial agreement would ensure that any commingling of assets or contributions by either party that happened before the postnuptial could be waived or settled. This would allow the assets to be considered non-marital property.
Many new-marriage postnuptial agreements come from couples who intended to sign a prenuptial agreement before the wedding but ran out of time. The same intent can still be honored in writing after the marriage. The Illinois rule on commingling and tracing under 750 ILCS 5/503(c) makes early-marriage postnuptial drafting valuable: the longer commingling continues without a written framework, the harder the original characterization is to defend later.
What to bring to your consultation: pre-marriage account statements and asset records, any prenuptial agreement draft that was started but not signed, documentation of any commingling that has happened so far, and a clear statement of which assets each spouse considers non-marital.
Couples with Children
Postnuptial agreements can also be helpful for parties who have children. While they cannot be used to decide which parent has primary custody or the amount of child support to be paid, they can still be helpful for parents who want to protect their children. Having children can sometimes prompt one or both parents to reassess the financial arrangements in their marriage, as they may seek to prioritize protecting their children in case of marital fallout.
For example, parents can use a postnuptial agreement to decide each party’s contribution for a child’s college or post-high school education. Parents could also use this type of agreement to specify that certain assets (such as a savings account or an inheritance) are non-marital and should belong to their children.
Another way in which parents can protect their children through a postnuptial agreement could be the allocation of the marital home. The parents could agree that one of them, in the case of a divorce, should retain the marital home and keep the home as an option for the children to continue to live in or spend time in after a divorce.
Finally, if a parent has children from a prior relationship, a postnuptial agreement can protect those children as well. Drafting a clear postnuptial agreement can protect property and assets a parent intends to leave to their children.
Not only can postnuptial agreements help parents in the manners outlined above, but they can also be a way for parents to settle some of the “big ticket” items in their marriage with less tension than an acrimonious divorce. This can create a more positive environment for the children to grow up in, with their parents establishing a standard for how to resolve conflicts.
750 ILCS 5/602.5 outlines Illinois law on parental responsibilities (formerly known as “custody”) and states that parental responsibilities cannot be set by private contract. Child support follows the income shares model under 750 ILCS 5/505 and is also governed by court order, not by the postnuptial agreement. However, a postnuptial agreement can help parents with non-custody allocations: who keeps the marital home, who funds college and post-secondary education, how inheritance and gift accounts intended for the children are characterized, and how stepchildren from prior relationships are treated in the financial picture.
What to bring to your consultation: a list of children and stepchildren with their current ages, any existing child support order from a prior relationship, college savings account statements, the current title and equity position on the marital home, and any documentation of inheritance or gifts intended for specific children.
Reconciliation
Pre- and post-nuptial agreements can have a negative connotation. However, they can be a useful tool in helping a couple establish a stronger connection. Sometimes, a couple may face difficulties in their marriage that make divorce a real possibility. A postnuptial agreement could be a way for the couple to reconcile and rebuild trust while also addressing financial concerns.
Illinois public policy recognizes the use of postnuptial agreements for reconciliation. A postnuptial agreement for reconciliation purposes is used to save or preserve the marriage; it is not drafted as a contemplation of divorce. When both spouses know exactly what would happen financially if the marriage ends, uncertainty is removed from the equation. With that clarity, a spouse who would otherwise be tempted to file for divorce quickly to lock in a more favorable maintenance or property outcome instead has reassurance that the financial terms are already settled. Both spouses become more inclined to work to save the marriage rather than file for divorce.
Whether a reconciliation postnup holds up depends on the same things as any other postnuptial agreement: it has to be voluntary, fully disclosed, and fair, and it cannot leave one spouse without basic financial security if the reconciliation does not last and the marriage ends years later. That last point matters most here, where the agreement is meant to remove financial fear, not create it. For how Illinois courts decide whether one holds up, see our article on whether postnuptial agreements are enforceable in Illinois.
What to bring to your consultation: an honest description of the marital stress that brought you to this point, a current financial picture from both spouses, written goals for what each spouse needs to feel financially secure to continue the marriage, and a commitment to engage independent counsel for both sides. Reconciliation-driven postnuptial agreements that survive challenge are the ones drafted with the same procedural rigor as any other Illinois postnuptial agreement.
If you and your spouse are working through whether a postnuptial agreement makes sense for your marriage, schedule a confidential consultation with Anderson Boback & Marshall.
Decide Whether a Postnuptial Agreement Is Right for Your Marriage
If you are in the Chicago area, the family law attorneys at Anderson Boback & Marshall can help you determine if a postnuptial agreement may be right for you. Schedule a free consultation today!
Anderson Boback & Marshall walks Illinois couples through the decision framework, drafting, and consultation across Cook County, DuPage County, Lake County, and Will County. To discuss whether a postnuptial agreement is right for your marriage, schedule a confidential consultation.
Frequently Asked Questions About Illinois Postnuptial Agreements
Is a Postnuptial Agreement Right for My Marriage in Illinois?
A postnuptial agreement may be right for your Illinois marriage when your situation involves a significant financial change, family complexity, or protection needs that default Illinois law does not guarantee. The five most common scenarios are a meaningful change in wealth or debt during the marriage, an older couple deciding to stay together for financial reasons, a new marriage where both spouses bring assets and family responsibilities, a couple with children whose protection requires written allocation, and a marriage in reconciliation after a period of conflict. Anderson Boback & Marshall walks couples through this decision in a confidential consultation.
Can a Postnuptial Agreement Save a Marriage in Illinois?
A postnuptial agreement can support a marriage in reconciliation by removing financial uncertainty as a source of stress. Illinois public policy reasoning is that when both spouses know what the financial picture would be if the marriage ends, the impulse to file for divorce as a self-protective measure often diminishes. The agreement must be drafted for the purpose of saving or preserving the marriage. It cannot be drafted as a contemplation of divorce. The distinction matters because Illinois courts have invalidated postnuptial agreements where the intent at signing was to position one spouse for divorce.
How Does Illinois Law Treat Postnuptial Agreements Differently Than Prenuptial Agreements?
Illinois courts treat postnuptial agreements with more scrutiny than prenuptial agreements because the consideration analysis is more demanding. A prenuptial agreement is signed in exchange for the marriage itself, which is recognized as legal consideration. A postnuptial agreement is signed during an existing marriage, where the spouses already owe each other fiduciary duties. Illinois courts apply a stricter fairness review to postnups than to prenups, looking at whether the agreement was voluntary, fully disclosed, and fair. Prenuptial agreements are governed by the Illinois Uniform Premarital Agreement Act.
What Financial Information Should I Bring to a Postnuptial Agreement Consultation?
Bring a current financial statement from both spouses showing assets, debts, income, and ownership interests. Bring documentation of any recent changes that triggered the consultation: business sale records, equity grant documents, inheritance documentation, or debt instruments. Bring relevant estate planning documents that may need coordination. Anderson Boback & Marshall reviews these materials at the consultation and identifies the substantive issues the postnuptial agreement should address. Complete and honest financial disclosure between spouses is the foundation for an enforceable Illinois postnuptial agreement.
How Does Anderson Boback & Marshall Help Couples Decide on a Postnuptial Agreement?
Anderson Boback & Marshall helps Illinois couples decide on a postnuptial agreement by walking the decision framework in a confidential consultation. The conversation covers the situation that prompted the question, the protections the agreement could provide, what default Illinois law guarantees if no agreement is signed, and whether a postnuptial agreement is the right instrument or whether another tool (estate planning, separation agreement, or no agreement at all) better serves the situation. The firm represents only one spouse in any agreement and coordinates with the other spouse’s independent counsel. The decision rests with the couple. The firm’s role is to make the decision informed.
