South Dakota Child Support Guidelines: How Support Is Calculated

In South Dakota, child support is set by adding together both parents' monthly net incomes, finding the combined support obligation on the state's statutory support obligation schedule based on the number of children, and then dividing that amount between the parents in proportion to each parent's share of the combined income (SDCL 25-7-6.2). This is often called the "income shares" model, and it is used whether the parents are divorcing, separating, or were never married.

How the calculation works

The starting point is each parent's monthly net income, not gross pay. The court adds both parents' net incomes together, looks up the combined obligation for that income level and the number of children involved on the statutory schedule, and then splits that dollar figure between the parents based on their proportionate share of the combined income. A parent who earns 60 percent of the couple's combined net income, for example, would generally be responsible for 60 percent of the scheduled support obligation, with the other parent responsible for the remainder.

What counts as "net income"

South Dakota law defines specific deductions that are subtracted from gross income to arrive at monthly net income. Under SDCL 25-7-6.7, the allowed deductions include:

• Income taxes, calculated using the single-taxpayer rate on a monthly payroll basis
• Social Security and Medicare (FICA) withholding
• Qualified retirement contributions, up to 10 percent of gross income
• Unreimbursed employee business expenses
• Payments already being made on other support and maintenance orders

Because these deductions are defined by statute rather than left to a parent's own bookkeeping, it is worth bringing pay stubs, tax returns, and documentation of any existing support orders to any hearing or child support conference.

Low-income situations

South Dakota's Division of Child Support explains that when the parent who will be paying support has a monthly net income that falls within the "low income" portion of the guidelines, the support amount is calculated two ways: once looking at that parent's proportionate share alone, and once using both parents' combined incomes. Whichever of the two amounts is lower is the one that becomes the actual child support obligation (South Dakota DSS, How Obligations Are Determined). This is intended to keep support obligations realistic for parents with limited income.

When combined income is higher than the schedule covers

If the parents' combined net monthly income is higher than the top figure listed on the statutory schedule, the court does not simply extrapolate the table. Instead, under SDCL 25-7-6.9, the court sets support at a level appropriate to the child's actual needs and standard of living, evaluated on the specific facts of the family rather than read directly off the chart.

Deviating from the scheduled amount

The scheduled amount is a strong starting point, but SDCL 25-7-6.10 allows a court to deviate from it based on enumerated factors, which can include the financial condition of each parent, the standard of living the child would have enjoyed if the family were together, any special needs of the child, the effect of any agreement between the parents, and tax consequences. Any deviation from the guideline figure must be supported by written findings explaining why the court departed from the schedule.

Shared parenting and overnight credit

South Dakota law allows for a "shared parenting cross credit" that can reduce a support obligation when parents share significant time with the child, but this credit is not automatic. Under SDCL 25-7-6.27, the cross credit is only available when the custody order includes a detailed shared parenting plan that provides the child will reside at least 180 nights per calendar year in each parent's home, and the court must also consider whether granting the credit would substantially and negatively affect the child's standard of living.

For purposes of counting nights, a child is considered to reside with a parent for a given night if the child sleeps at that parent's residence, or, if the child does not sleep at any residence that night, if the child is in that parent's company (SDCL 25-7-6.14; SDCL 25-7-6.27). Where the cross credit applies, each parent's individual support obligation is prorated based on their percentage of the 365 nights in the year, the two prorated obligations are offset against each other, and the parent with the larger resulting obligation pays the other parent the difference.

Modifying an existing South Dakota child support order

This section involves a time-sensitive rule, so confirm the current status with the Division of Child Support or your circuit court before relying on it. Only a circuit court in South Dakota has the authority to enter or modify a child support obligation; child support referees can conduct hearings and make recommendations, but the court itself must approve any change (South Dakota Unified Judicial System, Family Law Self-Help). Either parent, or in some cases a representative such as a grandparent, aunt, uncle, or another person who holds legal custody of the child, may file a petition asking the court to modify an existing order (South Dakota DSS, Modify My Support Order).

Generally, a South Dakota order can be modified either after a substantial change in circumstances, or, separately, once enough time has passed since the order was entered without needing to prove a change in circumstances at all. The South Dakota Department of Social Services notes that orders entered before July 1, 2022, could be modified without a showing of changed circumstances; the specific rule that applies to orders entered after that date is a detail you should confirm directly with the Division of Child Support or the circuit court, since guideline schedules and modification thresholds in South Dakota are periodically updated.

Enforcement: the federal backbone behind South Dakota support orders

Federal law does much of the heavy lifting that makes South Dakota child support enforceable, even across state lines. As a condition of federal funding, states must operate a Title IV-D child support enforcement agency and use standardized tools such as income withholding, paternity establishment procedures, license suspension, and liens against a delinquent parent's property (42 U.S.C. §§ 654, 666). Federal law also waives the government's sovereign immunity so that federal wages and benefits can be garnished to satisfy a support obligation (42 U.S.C. § 659).

If the other parent lives in a different state, 28 U.S.C. § 1738B requires that state to enforce South Dakota's order and generally prohibits that state from modifying it, except under narrow continuing-jurisdiction rules. This federal rule works together with South Dakota's version of the Uniform Interstate Family Support Act to determine which state's court controls when parents are no longer in the same state.

Child support debt also receives special protection in bankruptcy. A "domestic support obligation," which includes child support, cannot be discharged in bankruptcy (11 U.S.C. § 523(a)(5)) and is paid ahead of most other unsecured debts (11 U.S.C. § 507(a)(1)). Property-settlement obligations from a divorce decree are also generally non-dischargeable in a Chapter 7 bankruptcy.

What you can do in South Dakota

1. Gather income documentation for both parents, including recent pay stubs, tax returns, and records of any other support orders, since these drive both the gross-to-net calculation and any low-income comparison.
2. Contact the South Dakota Division of Child Support (part of the Department of Social Services) if you need help starting a new case, calculating an obligation, or beginning a modification.
3. If you and the other parent share meaningful overnight time with the child, keep a record of actual overnights and make sure any parenting plan filed with the court spells out the shared-parenting arrangement in detail, since the 180-night threshold and the written plan are both required for the cross credit.
4. If your combined income situation has changed substantially, or if a significant amount of time has passed since your order was entered, file a petition to modify with the circuit court; remember that only the circuit court can actually change the order, even though a referee may hear the case first.
5. If the other parent lives out of state or is not paying, ask the Division of Child Support about interstate enforcement options, which rely on federal law requiring other states to honor and enforce a South Dakota order.
6. Before any hearing, confirm the current version of the statutory schedule, deduction rules, and modification thresholds with the court or DSS, since these figures are set by statute and are updated from time to time.

This article is general information about South Dakota child support law, not legal advice for your specific situation.