Legal Separation in South Dakota: Grounds, Filing, and Orders

A legal separation in South Dakota is called “separate maintenance.” It is a court action that leaves the marriage intact while giving a judge authority to order spousal support, child support, and custody. You file it in the same courts, on the same grounds, and with much of the same paperwork as a divorce, but the outcome is different: you and your spouse remain legally married, neither of you can remarry, and the court’s power over your property is narrower than in a divorce.

How Separate Maintenance Differs From Divorce

The central difference is that a separate maintenance decree does not end the marriage. Because you stay married, you keep benefits tied to marital status — a spouse’s health insurance eligibility, continued accrual of years toward Social Security spousal benefits, and survivor rights under retirement plans.

The court’s authority is also narrower. In a divorce, a South Dakota court can make an equitable division of all property belonging to either or both spouses.1South Dakota Legislature. South Dakota Code 25-4 – Divorce and Separate Maintenance – Section 25-4-44 In a separate maintenance action, the statute authorizes the court only to award temporary alimony, suit money, and permanent support for a spouse and children.2South Dakota Legislature. South Dakota Code 25-4-40 – Action for Separate Maintenance Without Divorce – Alimony and Support The statute authorizing equitable property division specifically applies “[w]hen a divorce is granted.” If you need a court-imposed split of a house, retirement funds, or bank accounts, divorce gives clearer authority. In separate maintenance, property arrangements will usually need to come through your own agreement with your spouse.

Couples typically choose separation over divorce to preserve health insurance, honor religious beliefs about marriage, or leave room for reconciliation. Some start with separate maintenance and file for divorce later if things do not work out.

Residency Requirements

You must be a resident of South Dakota when you file. Members of the armed services stationed in the state also qualify. There is no minimum duration — you do not have to have lived in South Dakota for six months or a year before filing, as many other states require. Once the case is filed, you do not have to maintain residency to receive the final decree; if a job transfer takes you out of state during the case, the court can still enter judgment.3South Dakota Legislature. South Dakota Code 25-4-30 – Residence Requirements for Divorce or Separate Maintenance

Grounds You Can File On

South Dakota law allows a separate maintenance action on any ground that would justify a divorce.2South Dakota Legislature. South Dakota Code 25-4-40 – Action for Separate Maintenance Without Divorce – Alimony and Support The seven statutory grounds are:

Most couples file under irreconcilable differences because it does not require proving fault. The fault-based grounds require evidence, and you must prove the ground you chose to the court’s satisfaction before a decree is entered.9South Dakota Legislature. South Dakota Code Title 25 Chapter 04 Section 25-4-2 – Grounds for Divorce

The Consent Wrinkle for No-Fault Filings

If you file on irreconcilable differences, both spouses generally must consent to that ground — unless your spouse never responds to the case at all. If the court sees a possibility of reconciliation, it can pause the proceedings for up to 30 days and issue temporary orders for support, custody, and property preservation during that window. After the 30 days, either spouse can ask the court to move forward with the decree.10South Dakota Legislature. South Dakota Code 25-4-17.2 – Dissolution of Marriage – Legal Separation – Continuance If your spouse actively contests the case and refuses to agree that the differences are irreconcilable, you may need to amend and proceed on one of the fault-based grounds instead.

Filing and Service

File the petition at the Clerk of Courts office in the county where you or your spouse lives. The filing fee for a divorce action totals $97 — a $50 statutory clerk’s fee plus additional court costs — and a separate maintenance filing is processed similarly and should carry a comparable cost.11South Dakota Legislature. South Dakota Code 16-2-45 – Fee for Filing Divorce Action – Distribution of Fee12South Dakota Unified Judicial System. Guide to Filing Fees and Court Costs The clerk assigns a case number that you will use on every later document.

The petition asks for full legal names and addresses, the date and place of the marriage, the ground you are filing under, and, if there are minor children, their names, birth dates, and your proposed custody and parenting time arrangement. Forms are available through the South Dakota Unified Judicial System or at your local clerk’s office. Gather your financial picture — bank accounts, retirement funds, real estate, vehicles, credit card balances, loans — before you start filling out forms. If you are asking for temporary support, you will need pay stubs or tax returns to support the request.

Once the petition is filed, your spouse must be formally served with the summons and petition. A county sheriff or professional process server handles this; you cannot serve the papers yourself. Some spouses agree to accept service voluntarily using the state’s Notice and Admission of Service form, which avoids the cost of a process server. After being served, your spouse has 30 days to file a written response.13South Dakota Legislature. South Dakota Code 15-6-12(a) – Defenses and Objections – When and How Presented If no response comes within that window, the court can enter a default judgment.14South Dakota Unified Judicial System. Notice and Admission of Service of Summons and Complaints

What the Court Can Order

In a separate maintenance case, the court can award temporary alimony while the case is pending, suit money for attorney fees, and permanent ongoing support for a spouse and any children of the marriage.2South Dakota Legislature. South Dakota Code 25-4-40 – Action for Separate Maintenance Without Divorce – Alimony and Support If the case involves irreconcilable differences and the court orders a 30-day continuance, it can also issue temporary orders covering custody, child support, education expenses, and property preservation during that period.10South Dakota Legislature. South Dakota Code 25-4-17.2 – Dissolution of Marriage – Legal Separation – Continuance

How Child Support Is Calculated

South Dakota uses an income shares model. The court combines both parents’ monthly net incomes and assigns each parent a proportional share of the total obligation. The noncustodial parent’s share becomes the child support order. The guidelines include a self-support reserve of $871 per month so that a parent with very limited income keeps enough for basic living expenses.15South Dakota Legislature. South Dakota Code 25-7-6.2 – Support Obligation Schedule The court can deviate from the standard schedule when circumstances justify it, but any deviation must be accompanied by a written finding explaining why.

Why Couples Choose Separation Over Divorce

The practical consequences of staying married are what usually drive this choice.

Health insurance. Under federal employee health plans, a spouse covered under a Self and Family or Self Plus One enrollment remains eligible during a legal separation; divorce eliminates that eligibility the day it becomes final.16U.S. Office of Personnel Management. Im Separated or Im Getting Divorced Private employer plans vary, but many follow the same principle. Check your plan documents before assuming coverage will continue.

Social Security. Because you remain legally married, the marriage keeps accumulating years toward the 10-year threshold for Social Security spousal benefits. If you eventually divorce after at least 10 years of marriage, the lower-earning spouse can claim benefits based on the higher-earning spouse’s record.17Social Security Administration. More Info – If You Had a Prior Marriage For couples close to that mark, separate maintenance can protect a significant future benefit.

Taxes. A separate maintenance decree changes your IRS filing status. The IRS treats legally separated individuals the same as unmarried individuals: you can file as Single, or as Head of Household if you paid more than half the cost of maintaining a home for yourself and a qualifying dependent.18Internal Revenue Service. Filing Status Your status is determined by your marital status on the last day of the tax year, so a decree entered any time during the year affects that year’s return.

Retirement plans. A legally separated spouse is generally still treated as married under ERISA retirement plans. A separate maintenance decree alone does not automatically terminate a spouse’s rights to plan benefits; those rights usually require either a qualified domestic relations order or an explicit waiver signed with the plan administrator.

The Limited Role of Fault

Even when a fault-based ground is used to get the decree, South Dakota limits how fault affects the outcome. Fault is generally not considered in property awards or child custody decisions, with two narrow exceptions: fault may matter if it relates to how property was acquired during the marriage, or if it bears on a parent’s fitness to have custody.19South Dakota Legislature. South Dakota Code 25-4 – Divorce and Separate Maintenance – Section 25-4-45.1 Filing on a fault ground does not automatically get you a larger share of assets or more favorable custody. The court focuses on what is equitable and what serves the children’s best interests.