To file for divorce in Missouri, you must meet the residency requirement — at least one spouse must have lived in Missouri for at least 90 days immediately before filing — and file a Petition for Dissolution of Marriage with the Circuit Court in the county where either spouse resides. Missouri is a no-fault divorce state: the only ground required is that the marriage is irretrievably broken and there is no reasonable likelihood that the marriage can be preserved. There is no requirement to prove fault, though fault grounds — adultery, abandonment, cruel treatment — remain on the books and can be alleged if desired. The 90-day residency requirement is one of the shortest in the country.
Missouri imposes a 30-day waiting period from the date of filing. The divorce cannot be finalized before the 30th day after filing, even if both parties agree on every issue. An uncontested divorce with no children and no disputed financial issues can be finalized in roughly 30 to 60 days. A contested divorce with custody, support, or property disputes can take 6 to 18 months or longer.
Step 1: Confirm You Meet the Residency Requirement
At least one spouse must have been a resident of Missouri for at least 90 days immediately before filing. The divorce must be filed in the Circuit Court of the county where either spouse resides. If the petitioner (the filing spouse) resides in St. Louis County and the respondent resides in Jackson County, the petition may be filed in either county. There is no minimum time that the filing spouse must have lived in the specific county — only in the state. The 90-day clock must be complete on the date of filing. A spouse who has lived in Missouri for 80 days must wait 10 more days to file.
Step 2: Determine Your Grounds
| Ground | Type | What Must Be Proved |
| Irretrievably broken | No-fault | Marriage cannot be saved; no reasonable likelihood of reconciliation |
| Adultery | Fault | Other spouse committed adultery |
| Abandonment for 6+ months | Fault | Other spouse left without consent and without good cause |
| Cruel or inhuman treatment | Fault | Treatment by other spouse endangers life or health of petitioner |
The vast majority of Missouri divorces are filed under the no-fault ground — irretrievably broken. Fault grounds are rarely alleged because they require proof at trial, increase the cost and duration of the divorce, and have limited impact on property division or custody. Missouri courts divide marital property fairly under the equitable distribution standard and consider marital misconduct only if it directly affects the marital estate — such as spending marital assets on an extramarital affair.
Step 3: Prepare and File the Petition
The divorce begins when the petitioner files a Petition for Dissolution of Marriage with the Circuit Clerk’s office in the appropriate county. The petition must state the grounds for divorce, identify any minor children, describe the marital property and debts, and request the relief sought — dissolution, custody, child support, spousal maintenance, property division, and attorney fees. If children are involved, additional forms are required: a Parenting Plan, a Child Support Amount Calculation Worksheet (Missouri Form 14), a Statement of Income and Expenses, and a Statement of Property and Debt.
The filing fee varies by county — typically $150 to $250. A fee waiver is available for low-income filers who cannot afford the filing fee. The clerk assigns a case number and a judge. Keep the case number. The 30-day waiting period begins on the date the petition is filed.
Step 4: Serve the Petition on Your Spouse
The respondent must be formally served with the petition and a summons. Service in Missouri can be accomplished by the sheriff’s office ($30 to $60), by a private process server, by certified mail with a return receipt, or by the respondent signing a Waiver of Service form acknowledging receipt. The respondent has 30 days from the date of service to file an Answer. If the respondent does not answer, the petitioner may seek a default judgment. A default divorce proceeding — where the respondent fails to participate — still requires the petitioner to present evidence to the court, and the judge reviews the proposed custody and property arrangements for fairness.
Step 5: Wait 30 Days, Resolve All Issues, and Finalize
The 30-day waiting period is the minimum time between filing and final judgment. During this period, the parties must resolve all outstanding issues by agreement or by court order. If every issue is resolved — custody, parenting time, child support, property division, and spousal maintenance — by a signed Marital Settlement Agreement and Parenting Plan, the court can approve the agreement and enter the Judgment of Dissolution as soon as the 30 days expire. If any issue remains disputed, the court will schedule a pretrial conference, require mediation, and eventually set the case for trial. A contested Missouri divorce with custody and property disputes typically takes 6 to 18 months to finalize.
| Issue | Missouri Law |
| Property division | Equitable distribution — fair, not necessarily equal; only marital property is divided |
| Spousal maintenance (alimony) | Awarded based on need and ability to pay; no fixed formula; can be modifiable or non-modifiable |
| Child custody | Legal and physical custody; joint is favored if in the child’s best interests |
| Child support | MO Form 14 — income shares model; both parents’ incomes used to calculate obligation |
FAQ: Common Questions About Missouri Divorce
Can I file for divorce in Missouri without a lawyer?
Yes — the Missouri courts provide standard divorce forms, and an uncontested divorce with no children and minimal assets can be completed pro se. If children, real estate, retirement accounts, or spousal maintenance are involved, an attorney is strongly recommended — a poorly drafted settlement agreement can have permanent financial consequences. The Missouri Bar and legal aid organizations offer resources for self-represented litigants.
Does Missouri have legal separation?
Yes — Missouri allows a separate action for legal separation (called “separate maintenance”) that resolves custody, support, and property division without ending the marriage. The 30-day waiting period also applies. A legal separation can be converted to a dissolution of marriage after 90 days by motion of either party. Legal separation is used when the parties do not yet meet the 90-day residency requirement for divorce, when religious beliefs prohibit divorce, or when one spouse needs to remain on the other spouse’s health insurance.
File, Wait 30 Days, Resolve Everything, Finalize
Filing for divorce in Missouri requires 90 days of state residency, filing a Petition for Dissolution of Marriage in the county where either spouse resides, serving the other spouse, waiting through the 30-day mandatory period, resolving all issues by agreement or court order, and obtaining the final judgment. An uncontested divorce can be finalized in 30 to 60 days. A contested divorce takes 6 to 18 months or longer. The 90-day residency requirement and the 30-day waiting period make Missouri one of the faster states for an uncontested divorce.
