When marriages end in South Dakota, couples must file for divorce, citing specific legal grounds, the acceptable reasons recognized by law for dissolving a marriage. South Dakota divorce causes fall into two main categories: no-fault grounds based on irreconcilable differences and fault-based grounds requiring proof of specific marital misconduct.
No-Fault Divorce
The most common South Dakota divorce cause is the no-fault ground of "irreconcilable differences," which allows couples to end marriages without blaming either spouse for the breakdown.
What Irreconcilable Differences Mean
The judge can grant you a no-fault divorce if the judge finds that irreconcilable differences exist between you and your spouse. Irreconcilable differences exist when there are substantial reasons for the marriage to end, meaning fundamental problems that cannot be resolved and make continuing the marriage impossible.
This ground recognizes that marriages sometimes fail without either party being at fault. Couples may simply grow apart, develop incompatible life goals, or find they cannot build a happy life together despite good faith efforts.
Requirements for No-Fault Divorce
To get a divorce because of irreconcilable differences in South Dakota, one of two situations must exist. Either both spouses must agree and consent to a divorce on the grounds of irreconcilable differences, or the spouse who was served with the divorce petition does not appear in the divorce case (does not make a "general appearance").
If one spouse contests the divorce and refuses to agree to irreconcilable differences as the ground, the filing spouse must prove one of the fault-based grounds instead. This requirement makes South Dakota's no-fault divorce slightly different from pure no-fault states, where either spouse can obtain a divorce regardless of the other's wishes.
Reconciliation Period
If it appears to the judge that there's a reasonable possibility of you and your spouse being able to save your marriage (reconciliation), the judge will continue the case for up to thirty days. During this time, the judge can enter a temporary order dealing with support (also called maintenance or alimony), custody, attorney fees, and orders related to joint property.
At any time after this thirty-day period ends, either spouse can file a motion in court for divorce (dissolution) or legal separation, and the judge can grant it.
Advantages of No-Fault Divorce
Most South Dakota divorces proceed on irreconcilable differences because this approach simplifies the divorce process by eliminating the need to prove fault and reducing conflict between spouses during divorce proceedings. No-fault divorce protects privacy by avoiding detailed testimony about marital problems, moves faster through courts than contested fault divorces, and costs less in attorney fees and court costs. This allows couples to focus on practical matters like property division and custody rather than assigning blame for the marriage's failure.
Fault-Based Grounds for South Dakota Divorce
When spouses cannot agree to a no-fault divorce or when one spouse wants the court to know about specific misconduct, South Dakota law provides six fault-based grounds for divorce.
Why File Fault-Based Divorce
Couples might choose fault divorce to tell the court a fuller story about marriage breakdown, establish the spouse's misconduct for alimony considerations, or proceed when the other spouse refuses to consent to no-fault grounds. Some spouses file a fault divorce to document abuse or misconduct for custody purposes or seek justice or acknowledgment of wrongdoing.
However, fault divorce typically increases time and expense, requires substantial proof, and creates more acrimony between spouses. The strategic benefits must outweigh these high costs.
Adultery as Grounds for Divorce
Adultery occurs when your spouse has sexual intercourse with someone else after you're married, constituting one of the traditional fault grounds in South Dakota.
Proving Adultery
You must submit evidence to back it up if you cite adultery as grounds for divorce. You cannot accuse your spouse of adultery without having concrete evidence of such misconduct. Evidence proving adultery might include witness testimony observing a spouse with a paramour, photos or videos documenting inappropriate relationships, text messages or emails showing an affair, hotel receipts or credit card statements, GPS or location data showing a spouse's whereabouts, admission by a spouse or paramour, or private investigator reports.
The standard of proof for adultery requires clear and convincing evidence of the affair. Mere suspicion or circumstantial evidence alone typically doesn't suffice, though a pattern of suspicious behavior combined with opportunity may be sufficient.
How Adultery Affects Divorce Outcomes
Marital misconduct like adultery can affect certain divorce outcomes. Courts may consider a spouse's fault in causing the marriage to end when awarding spousal support. The adulterous spouse may receive reduced alimony or no alimony at all, particularly if the adultery directly caused the marriage breakdown.
However, fault of the parties as to the breakdown of the marriage is NOT a factor when the court divides property. Courts divide property equitably regardless of adultery. The relative fault of either party may only be considered for child custody if it's relevant to the fitness of the parent. Adultery alone doesn't affect custody unless it impacts parenting or exposes children to inappropriate situations.
Extreme Cruelty
Extreme cruelty exists when your spouse causes you serious physical injury or causes you serious mental suffering, making it unsafe or intolerable to continue the marriage.
Physical and Mental Cruelty
Physical cruelty includes domestic violence and physical abuse, assault causing bodily injury, threats of violence creating fear of harm, any pattern of physical aggression, and endangering your physical safety. Mental suffering encompasses severe emotional abuse and psychological manipulation, verbal abuse creating serious mental distress, isolation from family and friends, controlling behavior destroying your sense of self, threats and intimidation causing fear, and any pattern of behavior causing grievous mental suffering.
The cruelty must be serious enough to endanger physical safety or cause genuine mental anguish, not merely disagreements or ordinary marital discord.
Evidence Required
Proving extreme cruelty requires documentation such as medical records showing injuries or mental health treatment, police reports from domestic violence incidents, protection order documentation, witness testimony from those who observed abuse, photos of injuries, therapist or counselor statements, and journal entries documenting incidents.
Courts recognize that victims of abuse often lack perfect documentation, so testimony combined with available evidence may suffice to prove extreme cruelty grounds.
Protective Measures
If you're experiencing extreme cruelty, seek help immediately by filing for a protection order before or with divorce papers, contacting domestic violence hotlines and shelters, preserving evidence of abuse, informing your attorney about safety concerns, and developing a safety plan for you and your children. South Dakota courts take domestic violence seriously and can issue protective orders quickly when danger exists.
Willful Desertion
Willful desertion means your spouse leaves you with the intent to leave the marriage, abandoning marital obligations and the relationship.
What Constitutes Desertion
Willful desertion occurs when your spouse physically leaves with the intent to end the marriage, the desertion lasts continuously for at least one year, your spouse leaves without your consent, and your spouse leaves without good cause. It is NOT "willful desertion" if you and your spouse separate with the knowledge that one of you is planning to file for divorce. Mutual separation or agreed-upon separation doesn't qualify as desertion.
Special Forms of Desertion
Willful desertion can also mean several specific situations. Your spouse regularly refuses to have sexual intercourse when there's no physical or mental reason for them to do so, which courts recognize as abandonment of marital obligations. Constructive desertion occurs when your spouse tricks you into leaving your home and then abandons the marriage. Forced departure happens when your spouse is cruel or threatens bodily harm to you, forcing you to flee the marriage to avoid reasonably expected danger.
Desertion also includes situations where your spouse leaves temporarily and then decides to leave permanently while gone, or when your spouse refuses a good-faith effort by you to get back together (reconcile) and fix the marriage. All these situations constitute abandonment of marital duties even without physical departure.
Proving Desertion
Evidence for desertion includes documentation of when the spouse left, communications showing intent not to return, evidence spouse refused reconciliation attempts, witness testimony about abandonment, financial records showing the spouse stopped contributing, and proof of continuous absence for the required duration.
The burden falls on the filing spouse to demonstrate not just physical absence but intent to permanently abandon the marriage.
Willful Neglect
Willful neglect occurs when your spouse refuses to provide for your common needs even though they can afford to do so, or because of laziness (idleness), extravagant habits (profligacy), or wastefulness (dissipation).
What Willful Neglect Includes
This ground covers refusal to provide financial support despite ability, failure to contribute to household expenses, wasteful spending depleting marital resources, gambling away family money, substance abuse draining finances, excessive spending on non-essentials while necessities go unpaid, and deliberately remaining unemployed when able to work.
Willful neglect recognizes that financial abandonment can be as destructive as physical desertion. When one spouse squanders resources or refuses to contribute while the other struggles to meet basic needs, the marriage becomes untenable.
Proving Neglect
You must show spouse could provide support, your spouse refused to provide despite requests, the refusal stemmed from idleness, extravagance, or wastefulness, you lacked the means to meet common needs without your spouse's contribution, and the neglect caused hardship.
Evidence might include financial records showing spouse's income, documentation of unpaid bills and necessities, proof of spouse's wasteful spending, employment records or lack thereof, communications about financial needs, and testimony about spouse's refusal to contribute. The key is demonstrating both the capability to provide and the willful refusal to do so.
Habitual Intemperance
Habitual intemperance means your spouse is under the influence of alcohol so often that they can't manage normal activities, or so often that it causes you intense emotional distress.
Substance Abuse as Grounds
This ground addresses chronic alcoholism affecting daily functioning, drug addiction interfering with responsibilities, regular intoxication preventing work or parenting, substance abuse causing family problems, refusal to seek treatment despite problems, and a pattern of abuse lasting longer than one year.
South Dakota recognizes that addiction destroys marriages not just through the substance use itself but through the consequences, lost jobs, depleted finances, neglected children, broken promises, and the emotional toll on the sober spouse.
What Must Be Proven
To establish habitual intemperance, you must show spouse regularly uses alcohol or drugs, the use is excessive and ongoing, the use prevents managing normal activities, OR causes you intense emotional distress, and the pattern has continued long enough to be "habitual." Occasional drinking or isolated incidents of intoxication don't qualify; the pattern must be persistent and destructive.
Evidence of Habitual Intemperance
Documentation includes DUI arrests or convictions, treatment program records or refusal to attend, witness testimony about drinking or drug use, employment problems related to substance use, medical records showing health effects, photos or videos of intoxication, financial records showing spending on substances, and police reports from substance-related incidents.
Friends, family members, coworkers, and others who witnessed the pattern of intoxication can provide valuable testimony establishing habitual intemperance.
Conviction of Felony
If your spouse is convicted of a felony during your marriage, this constitutes grounds for divorce in South Dakota.
Requirements for This Ground
To use conviction of a felony as grounds, your spouse must have been convicted of a felony, the conviction must have occurred during your marriage, and the conviction must be final (not under appeal or overturned). The specific nature of the felony doesn't matter; any felony conviction during marriage qualifies as grounds.
This makes conviction of felony one of the most straightforward fault grounds to prove, since it relies on objective court records rather than contested testimony about private marital conduct.
Evidence Required
Proving this ground requires official court records of felony conviction, sentencing documents, marriage certificate showing conviction occurred during marriage, and documentation of conviction finality. This is typically the easiest fault ground to prove since it relies on public court records rather than private marital conduct requiring witness testimony or contested evidence.
How Fault Affects Divorce Outcomes
Understanding how courts treat fault helps you decide whether to pursue fault-based or no-fault divorce.
Property Division
The fault of the parties as to the breakdown of the marriage is NOT a factor when the court divides property. Judges cannot consider marital fault when dividing property; decisions are based solely on fairness and equitable distribution principles.
This means even if your spouse committed adultery, abuse, or other misconduct, the court will divide property based on factors like length of marriage, each party's financial situation, contributions to marital property, economic circumstances, and future needs. South Dakota's approach recognizes that property division should be based on economics, not punishment.
Alimony
Judges MAY consider a spouse's fault in causing the marriage to end when awarding spousal support. The court examines fault among many factors including standard of living during marriage, earning capacity of both parties, length of marriage, age and health, contributions to the marriage, and fault leading to dissolution.
An adulterous spouse or one guilty of extreme cruelty may receive reduced alimony or be denied support entirely, while an innocent spouse may receive higher awards. This represents the primary area where proving fault grounds can produce tangible financial benefits in a South Dakota divorce.
Child Custody
The relative fault of either party may only be considered if it's relevant to the fitness of the parent. Courts focus primarily on the child's best interests, considering each parent's relationship with the child, capacity to meet the child's needs, mental and physical health, home stability, and willingness to facilitate a relationship with the other parent.
Fault matters for custody only when it affects parenting ability, such as abuse toward spouse or children, substance abuse affecting parenting, criminal conduct endangering children, or exposing children to inappropriate situations. Adultery alone, for instance, typically doesn't affect custody unless the affair exposed children to inappropriate situations or the paramour poses risks to the children.
Choosing Between No-Fault and Fault Divorce
Most South Dakota divorces proceed on no-fault irreconcilable differences, but fault grounds remain available when circumstances warrant.
When to Choose No-Fault Divorce
No-fault divorce makes sense when both spouses agree the marriage should end, you want to minimize conflict and costs, privacy about marital problems matters, no significant fault issues exist, you can reach agreements on major issues, and speed and efficiency are priorities.
The vast majority of South Dakota couples choose this path because it allows them to move forward without the emotional and financial costs of proving fault. When both parties recognize the marriage has failed and simply want to divide assets and move on, no-fault provides the most practical route.
When to Consider Fault Divorce
Fault-based grounds may be appropriate when your spouse refuses to consent to a no-fault divorce. Establishing fault helps your alimony case, documenting abuse matters for custody or safety, you need the court to understand specific misconduct, evidence of fault is clear and provable, and the added time and expense is worthwhile.
Some situations genuinely require fault grounds, particularly when abuse has occurred or when one spouse's serious misconduct should affect alimony. However, these situations represent the minority of South Dakota divorces.
Practical Considerations
Before choosing fault divorce, consider the increased cost in attorney fees due to increased litigation, evidence gathering, witness preparation, and trial time. Fault cases take longer to resolve than uncontested no-fault divorces, potentially adding months to the process. The emotional toll requires reliving marital problems, testifying about painful incidents, and enduring cross-examination about private matters.
The impact on children through contested fault divorces exposes them to parental conflict and may require them to learn details about their parents' behavior. Most importantly, since a fault doesn't affect property division and only sometimes affects alimony, the benefits may not justify the costs in many cases.
Starting Your South Dakota Divorce
Regardless of which grounds you choose, the divorce process follows similar initial steps.
Meeting the Residency Requirement
To obtain a divorce in South Dakota, you must be a resident in good faith at the time you file. There's no specific length of residency or waiting period before beginning the action required. However, once the proceeding is commenced, you must remain a resident of the state until the divorce is final.
This lenient residency requirement makes South Dakota accessible for divorce, though you cannot establish temporary residence just to obtain a divorce before returning elsewhere.
Filing Divorce Papers
After you hire an attorney (or if proceeding pro se), the attorney prepares a summons and complaint for divorce. The complaint asks the court to grant a divorce, states your grounds (no-fault or specific fault ground), and specifies what you want regarding child custody, support, visitation, alimony, and property division.
The summons demands that your spouse answer the complaint within thirty days or a default judgment may be entered after sixty days. This creates urgency for the responding spouse to take the divorce seriously and file appropriate responses.
Serving Your Spouse
The summons and complaint must be "served", personally delivered, to your spouse to notify them of the divorce action. Your spouse may sign an "admission of service," saving the expense of formal service, or the sheriff or process server can serve the papers.
Your spouse has thirty days from service to file a formal answer. Filing an answer means your spouse is contesting such things as the divorce, child custody, child support, alimony, or division of property and debts. If your spouse files a counterclaim, they're raising their own grounds for divorce or requesting relief.
The 60-Day Waiting Period
South Dakota imposes a mandatory 60-day waiting period. Divorces cannot be finalized until at least 60 days after the summons is served. This "cooling off" period applies to both contested and uncontested divorces, allowing time for reconciliation or settlement negotiations.
During this waiting period, courts can enter temporary orders addressing immediate needs like custody, support, and use of the marital home while the divorce proceeds toward final resolution.
Working with a South Dakota Divorce Attorney
Given the complexity of grounds for divorce, evidence requirements, and strategic considerations, most people benefit from experienced legal representation.
What Attorneys Help With
Divorce attorneys assist by advising which grounds best suit your situation, gathering evidence to prove fault grounds, preparing and filing divorce papers correctly, negotiating settlements on all issues, representing you in court hearings, protecting your rights throughout the process, and explaining how fault affects your specific case.
An experienced attorney knows when fault grounds will actually benefit your case and when pursuing them wastes time and money. This strategic guidance alone often justifies the cost of representation.
Attorney Fees
Each party is responsible for its own attorney fees unless the court orders otherwise. The court can order either party to pay all or part of the other party's attorney fees and costs. Attorney fees vary based on whether the divorce is contested or uncontested, the complexity of property and custody issues, whether fault grounds require extensive proof, the time required for settlement negotiations or trial, and the attorney's experience and local rates.
In certain cases, filing fees and sheriff's fees may be waived for persons whose sole source or primary source of income is aid to dependent children, social security, county poor relief, or at a level determined by the court to be so low that the person cannot afford to pay the fees.
Moving Forward
South Dakota provides both no-fault and fault-based options for ending marriages, giving couples flexibility to choose grounds appropriate to their circumstances. While most divorces proceed on the simpler no-fault ground of irreconcilable differences, the six fault grounds remain available when spouses need to establish misconduct or cannot agree to a no-fault divorce.