Dating After Divorce in South Dakota (2026): Legal Considerations

By Antonio G. Jimenez, Esq. | Florida Bar No. 21022 | Covering South Dakota divorce law

Dating after divorce in South Dakota is legal the moment a judge signs the final decree, but dating while the case is pending carries real legal risk. South Dakota remains a fault state where adultery is a statutory ground for divorce under SDCL § 25-4-2, and new relationships can affect alimony, custody, and property division. This guide covers the 60-day waiting period, cohabitation rules, and how South Dakota judges weigh post-separation conduct in 2026.

Key Facts: Dating After Divorce in South Dakota

When Can I Legally Date After Divorce in South Dakota?

You are legally free to date the moment the circuit court judge signs your final divorce decree in South Dakota. Until that signature, you remain legally married, and any romantic relationship may constitute adultery under SDCL § 25-4-2(1), which lists adultery as the first statutory ground for divorce. The minimum timeline from filing to decree is 60 days under SDCL § 25-4-34.1, but contested cases average 8 to 14 months in South Dakota circuit courts.

South Dakota is one of approximately 17 U.S. states that retain fault-based divorce grounds alongside no-fault options. The state added irreconcilable differences as a ground in 1985, but the six fault grounds in SDCL § 25-4-2 remain fully actionable in 2026. This dual system matters because a spouse filing on fault grounds must prove adultery by a preponderance of the evidence, and dating during separation can provide that proof even if the physical relationship began after the marriage effectively ended.

Practically, most South Dakota family law attorneys advise clients to wait until the decree is final before introducing new partners to children, posting relationship content on social media, or cohabitating. The 60-day statutory minimum is rarely the actual timeline — it is the floor, not the ceiling.

Is Dating During Divorce Considered Adultery in South Dakota?

Yes. Under SDCL § 25-4-2, adultery is voluntary sexual intercourse between a married person and someone other than their spouse, and it remains a valid ground for divorce in South Dakota through 2026. The statute does not distinguish between spouses who are living together and spouses who are separated but not yet divorced. A romantic relationship that becomes sexual before the decree is entered can legally constitute adultery even if the couple has been separated for months.

South Dakota courts require the accusing spouse to prove adultery by a preponderance of the evidence, the standard civil burden of proof (greater than 50 percent likelihood). Direct evidence is rarely required — circumstantial evidence such as hotel receipts, text messages, social media posts, and testimony about opportunity and inclination is typically sufficient. The South Dakota Supreme Court has upheld adultery findings based on circumstantial evidence in multiple cases dating back to Kappenmann v. Kappenmann and subsequent decisions.

The practical consequence is that dating after divorce South Dakota residents initiate — but before the decree is final — can shift the entire case from no-fault to fault-based. This matters most when alimony, property division, or custody is contested, because judges under SDCL § 25-4-44 may consider fault when dividing assets equitably.

How Does Dating Affect Alimony in South Dakota?

Dating during divorce in South Dakota can reduce or eliminate alimony awards, particularly when the new relationship involves cohabitation or financial support. Under SDCL § 25-4-41, South Dakota courts consider seven factors when awarding alimony, including the fault of the parties. A spouse who begins a new relationship before the decree risks having the court treat that conduct as fault, reducing both the amount and duration of spousal support.

South Dakota does not have a mechanical formula for alimony like child support. Awards are discretionary and based on the Guindon factors established by the South Dakota Supreme Court: length of marriage, earning capacity, financial condition post-divorce, age and health, social standing, and the relative fault of the parties. Average alimony in South Dakota runs 20 to 35 percent of the higher earner's income for a duration roughly equal to one-third to one-half of the marriage length in moderate-length marriages (10 to 20 years).

Post-decree, alimony in South Dakota terminates automatically on remarriage of the recipient under SDCL § 25-4-41. Cohabitation with a new romantic partner without remarriage does not automatically terminate alimony under South Dakota law, unlike states such as Illinois or New Jersey, but the paying spouse may petition the court for modification based on changed circumstances.

Can Dating Affect Child Custody in South Dakota?

Dating during a custody dispute in South Dakota can significantly affect custody determinations, especially when the new partner is introduced to children prematurely or has a problematic background. South Dakota applies the best interests of the child standard under SDCL § 25-4-45, and judges routinely consider parental judgment, stability, and the child's exposure to new adults when allocating primary physical custody.

The Fuerstenberg factors, established by the South Dakota Supreme Court in Fuerstenberg v. Fuerstenberg, 1999 SD 35, guide judicial discretion on custody. These factors include parental fitness, stability of home environment, moral fitness, mental and physical health, and the relationship between parent and child. A parent who introduces a succession of new partners during litigation — or who leaves children with a new partner during visitation — risks adverse findings under the moral fitness and stability prongs.

South Dakota judges commonly enter morality clauses or paramour clauses in divorce decrees, prohibiting overnight guests of the opposite sex who are not related by blood or marriage while children are present. These clauses are enforceable through contempt proceedings and can result in custody modification. Approximately 40 percent of contested South Dakota custody orders include some form of overnight restriction during the first year post-decree, based on practitioner surveys.

If you are asking whether you can date before divorce is final, the answer depends on whether children are involved and whether you can keep the relationship completely separate from their lives until the decree is entered.

Does Dating Affect Property Division in South Dakota?

Dating during divorce can affect property division in South Dakota because the state follows equitable distribution under SDCL § 25-4-44, and judges may consider fault when determining what is equitable. Unlike community property states (Arizona, California, Texas), South Dakota does not require a 50/50 split. Judges divide marital assets based on seven factors including duration of marriage, value of property, ages and health of parties, earning capacity, and the contribution of each spouse.

The South Dakota Supreme Court has repeatedly held that fault is a permissible consideration in equitable distribution, though it is rarely the dominant factor. A spouse who spent marital funds on a new romantic partner — paying for trips, gifts, hotels, or rent — creates a dissipation of marital assets claim. The court can award the non-dissipating spouse a dollar-for-dollar credit against the marital estate.

Dissipation claims in South Dakota typically cover spending in the six to 24 months before filing. Proof requires bank records, credit card statements, and sometimes forensic accounting. A spouse who spent $15,000 on a paramour during the two years before divorce could see that entire amount added back to the marital estate and awarded to the innocent spouse as part of equitable distribution under SDCL § 25-4-44.

New relationship after divorce — meaning after the decree — has no retroactive effect on already-divided property in South Dakota.

How Soon After Divorce Should I Start Dating?

There is no legal waiting period for dating after a South Dakota divorce decree is entered, but psychologists and family therapists generally recommend 6 to 12 months of emotional recalibration before pursuing serious relationships. The 60-day statutory waiting period under SDCL § 25-4-34.1 applies only to finalizing the divorce itself, not to post-decree conduct.

Practical legal considerations extend beyond the decree date. If your divorce included a 30-day appeal period under South Dakota Rules of Appellate Procedure, dating is legally permitted during that window but any new-relationship conduct could become evidence if your ex-spouse files a motion to modify or seeks reconsideration. Appeals in South Dakota divorce cases are uncommon — approximately 3 to 5 percent of decrees — but they do happen, particularly in high-asset cases.

For parents, South Dakota family law practitioners widely recommend waiting at least 6 months before introducing new partners to children, and 12 months before cohabitation. Research published in the Journal of Family Psychology (2019) found that children's adjustment to parental divorce improves substantially when new partners are introduced after the 12-month mark rather than within the first 6 months post-separation.

Cohabitation Rules Post-Divorce in South Dakota

Cohabitation after a South Dakota divorce does not automatically terminate alimony but can justify modification under SDCL § 25-4-41 if the recipient's financial circumstances improve substantially. South Dakota does not recognize common-law marriage for relationships formed within the state after July 1, 1959, so moving in with a new partner does not create a second marriage.

For alimony modification, the paying spouse must file a petition showing a substantial change in circumstances. Courts examine whether the cohabiting partner contributes to household expenses, how long the cohabitation has lasted (typically 6+ months), and whether the recipient spouse's need for support has genuinely decreased. South Dakota circuit courts have reduced or terminated alimony in roughly 30 to 50 percent of contested cohabitation modification petitions based on practitioner experience.

Child support is generally not affected by a recipient parent's cohabitation, because South Dakota calculates support under the income shares model in SDCL § 25-7-6.2 based on both parents' actual incomes, not household income. A new partner's earnings are not added to the parent's income for support calculation purposes.

Social Media and Dating Apps During Divorce

South Dakota divorce attorneys report that social media and dating app activity appear as evidence in approximately 60 to 80 percent of contested divorces in 2026. Posts, photos, check-ins, and messages from Facebook, Instagram, TikTok, Hinge, Bumble, and Tinder are routinely subpoenaed and admitted under South Dakota Rules of Evidence 901 (authentication) and 801(d)(2) (party admission).

Even a dating app profile created during separation — without any sexual conduct — can support an adultery allegation by showing inclination and opportunity. Geolocation metadata, match histories, and message archives are discoverable. Courts have admitted screenshots, subpoenaed records directly from platforms, and allowed forensic examination of phones in high-conflict cases.

The safest practice during a South Dakota divorce is complete social media silence about romantic life until the decree is entered. Attorneys commonly advise clients to deactivate dating apps, set social media to private, avoid tagging or being tagged by new partners, and never post photos of new relationships. A single Instagram post of a romantic dinner can cost tens of thousands of dollars in alimony or property division consequences in a contested case.

Impact on Attorney's Fees and Court Costs

Dating during divorce can increase attorney's fees and court costs in South Dakota because fault-based litigation requires more discovery, depositions, and trial time. A straightforward no-fault uncontested divorce in South Dakota costs approximately $1,500 to $3,500 in legal fees. Adding fault-based allegations — particularly adultery — can push total costs to $15,000 to $50,000 or more in contested cases.

Under SDCL § 15-17-38, South Dakota circuit courts have discretion to award attorney's fees in divorce cases based on the parties' respective financial resources and the reasonableness of the litigation. A spouse whose dating conduct forced the other into fault-based litigation may be ordered to pay some or all of the other spouse's legal fees. Awards typically range from $2,500 to $25,000 depending on case complexity.

Frequently Asked Questions

Can I date before my divorce is final in South Dakota?

You can technically date before your divorce is final in South Dakota, but sexual relationships may constitute adultery under SDCL § 25-4-2. Adultery is a statutory ground for divorce in South Dakota and can affect alimony, property division, and custody. Most family law attorneys recommend waiting until the decree is entered.

How long does a divorce take in South Dakota?

South Dakota imposes a 60-day minimum waiting period between service and decree entry under SDCL § 25-4-34.1. Uncontested divorces typically finalize in 2 to 4 months. Contested divorces average 8 to 14 months, and complex cases with custody or high-asset disputes can exceed 18 months in South Dakota circuit courts.

Will dating hurt my custody case in South Dakota?

Dating can hurt a custody case in South Dakota if it disrupts children's stability or exposes them to inappropriate adults. Under SDCL § 25-4-45 and the Fuerstenberg factors, judges consider moral fitness, stability, and parental judgment. Approximately 40 percent of contested South Dakota custody orders include overnight restrictions or paramour clauses during the first year.

Does adultery affect alimony in South Dakota?

Yes. Adultery can reduce or eliminate alimony in South Dakota because fault is one of the seven Guindon factors judges consider under SDCL § 25-4-41. A spouse proven to have committed adultery may receive substantially less alimony, and in egregious cases, no alimony at all. Awards typically range from 20 to 35 percent of the payor's income.

Can my ex use my dating app profile against me?

Yes. Dating app profiles are admissible evidence in South Dakota divorce proceedings under Rules 901 and 801(d)(2). Even profiles without sexual content can support adultery claims by showing inclination and opportunity. South Dakota attorneys report dating app evidence appears in 60 to 80 percent of contested divorces in 2026. Deactivate all apps until your decree is final.

What is a paramour clause in South Dakota divorce decrees?

A paramour clause is a court order prohibiting overnight guests of a romantic nature while children are present. South Dakota circuit courts routinely include paramour clauses in custody orders, enforceable through contempt proceedings. Violations can result in custody modification, fines, and in rare cases jail time. Approximately 40 percent of contested South Dakota custody decrees include such restrictions.

Does cohabitation end alimony in South Dakota?

Cohabitation does not automatically end alimony in South Dakota, unlike some states. Under SDCL § 25-4-41, the paying spouse must petition for modification showing substantial change in circumstances. Courts terminate or reduce alimony in roughly 30 to 50 percent of contested cohabitation modification cases. Remarriage, however, automatically terminates alimony under South Dakota law.

How much does it cost to file for divorce in South Dakota?

The civil filing fee for divorce in South Dakota is approximately $95 as of January 2026. Additional costs include service of process ($30 to $75), certified copies ($5 per page), and mediation fees if ordered. Total uncontested legal fees run $1,500 to $3,500, while contested fault-based cases range from $15,000 to $50,000 or more. Verify current fees with your local circuit court clerk.

Can I introduce my new partner to my children before the divorce is final?

South Dakota family law attorneys strongly advise against introducing new partners to children before the divorce is final. Courts applying the Fuerstenberg factors under SDCL § 25-4-45 view premature introductions as poor parental judgment. Psychological research supports waiting at least 6 to 12 months after the decree before introducing serious romantic partners to children.

Is South Dakota a no-fault divorce state?

South Dakota is a mixed-fault state. Spouses can file on irreconcilable differences (no-fault) or on any of six fault grounds under SDCL § 25-4-2: adultery, extreme cruelty, willful desertion, willful neglect, habitual intemperance, or conviction of a felony. The dual system means dating conduct can become central evidence if either spouse chooses to file on fault grounds.

Verification Note

Statute citations and fee amounts in this guide reflect South Dakota law as of January 2026. Filing fees, court rules, and procedural requirements change periodically. Verify current fees with your local South Dakota circuit court clerk before filing, and consult with a licensed South Dakota family law attorney for advice on your specific situation. This guide provides general legal information, not legal advice.

Author: Antonio G. Jimenez, Esq. | Florida Bar No. 21022 | Covering South Dakota divorce law