Understanding the difference between alimony and child support in South Dakota is essential for anyone navigating divorce. South Dakota courts award alimony (spousal support) under SDCL § 25-4-41 based on factors including the length of marriage, earning capacity, and standard of living, while child support follows the income shares model under SDCL § 25-7-6.2 with fixed guideline amounts based on combined parental income. Alimony terminates upon remarriage or death, whereas child support continues until the child turns 18 (or 19 if still in high school). The filing fee for divorce in South Dakota is approximately $95-$97, which includes a $50 base filing fee, $40 automation surcharge, and $7 law library fee as of March 2026.
| Key Facts | Details |
|---|---|
| Filing Fee | $95-$97 (varies by county) |
| Waiting Period | 60 days minimum |
| Residency Requirement | Resident at time of filing |
| Grounds | No-fault (irreconcilable differences) |
| Property Division | Equitable distribution |
| Alimony Statute | SDCL § 25-4-41 |
| Child Support Statute | SDCL § 25-7-6.2 |
What Is the Difference Between Alimony and Child Support in South Dakota?
Alimony and child support serve fundamentally different purposes under South Dakota law. Alimony (also called spousal support or maintenance) is financial support paid from one spouse to another to address economic disparity created by the marriage, governed by SDCL § 25-4-41. Child support is a parent's legal obligation to contribute financially to raising their children, calculated under SDCL § 25-7-6.2 using the income shares model adopted by South Dakota in 2018. Understanding this distinction helps divorcing spouses anticipate their financial obligations and plan accordingly.
South Dakota courts treat these obligations separately when dividing finances during divorce. A spouse paying child support may also pay alimony, or vice versa, depending on the circumstances. The key difference lies in the beneficiary: alimony supports a former spouse, while child support ensures children maintain an appropriate standard of living. South Dakota family courts prioritize the welfare of children, meaning child support calculations typically take precedence over alimony determinations when both are at issue.
| Comparison | Alimony | Child Support |
|---|---|---|
| Beneficiary | Former spouse | Children |
| Governing statute | SDCL § 25-4-41 | SDCL § 25-7-6.2 |
| Calculation method | Discretionary factors | Income shares guidelines |
| Tax treatment | No federal deduction/inclusion | No federal deduction/inclusion |
| Termination | Death, remarriage, cohabitation | Child turns 18 (or 19 if in high school) |
| Modification | Substantial change in circumstances | Income change of 10%+ typically |
How Is Alimony Calculated in South Dakota?
South Dakota courts calculate alimony on a case-by-case basis using discretionary factors under SDCL § 25-4-41, with no fixed formula or guidelines. Judges consider the length of the marriage, each spouse's earning capacity, the marital standard of living, and the receiving spouse's financial needs. Unlike child support, South Dakota does not use a calculator or percentage-based approach for spousal support, giving courts significant flexibility in determining appropriate awards.
The South Dakota Supreme Court has established that alimony should help the receiving spouse become self-supporting within a reasonable time. Courts evaluate vocational skills, employment history, and the time and expense needed to acquire sufficient education or training. For long-term marriages (typically 20+ years), South Dakota courts may award permanent or rehabilitative alimony. Short-term marriages (under 5 years) rarely result in significant alimony awards unless extraordinary circumstances exist.
South Dakota courts weigh the following factors when determining alimony under SDCL § 25-4-41:
- Length of the marriage and age of each party
- Earning capacity and employment history of each spouse
- Physical and emotional health of both parties
- Financial needs and obligations of each spouse
- Marital standard of living established during the marriage
- Contributions of each spouse to marital property
- Custodial responsibilities for minor children
- Property division and its effect on each spouse's income needs
- Tax consequences of the alimony award
- Any other factors the court deems relevant and equitable
How Is Child Support Calculated in South Dakota?
South Dakota calculates child support using the income shares model under SDCL § 25-7-6.2, which bases support on both parents' combined monthly net income. The official South Dakota Child Support Obligation Calculator covers combined incomes from $1,200 to $20,000 per month. For one child, base support ranges from approximately $254 (at $1,200 combined income) to $1,822 (at $20,000 combined income). South Dakota adopted the income shares model effective July 1, 2018, replacing the previous flat percentage model.
The income shares approach recognizes that children should receive the same proportion of parental income they would have received if the parents lived together. South Dakota courts calculate each parent's gross income from all sources, then deduct allowable expenses (including federal and state taxes, Social Security, and mandatory retirement contributions) to determine net income. The combined net income determines the basic support obligation from the guideline schedule, and each parent pays their proportionate share based on their percentage of combined income.
South Dakota child support calculations include these income sources under SDCL § 25-7-6.3:
- Wages, salaries, commissions, and bonuses
- Self-employment income (gross receipts minus ordinary business expenses)
- Rental and investment income
- Social Security benefits and disability payments
- Unemployment and workers' compensation benefits
- Pension and retirement distributions
- Spousal support received from a prior relationship
- Imputed income if voluntarily unemployed or underemployed
How Long Does Alimony Last Compared to Child Support?
South Dakota alimony duration varies based on the marriage length and circumstances, while child support continues until the child turns 18, or age 19 if the child is still a full-time high school student under SDCL § 25-5-18.1. Courts typically award rehabilitative alimony for a specific period (often 3-5 years) to allow the receiving spouse time to become self-supporting. Long-term marriages may result in permanent alimony that continues until death, remarriage, or a substantial change in circumstances.
South Dakota courts recognize several types of alimony with different durations:
- Rehabilitative alimony: Awarded for a fixed period (typically 2-5 years) to allow the receiving spouse to acquire education, training, or work experience needed for self-sufficiency
- Permanent alimony: Reserved for long-term marriages (20+ years) or situations where the receiving spouse cannot become self-supporting due to age, disability, or caregiving responsibilities
- Temporary alimony (pendente lite): Awarded during divorce proceedings and terminates when the divorce is finalized
Child support in South Dakota follows a more predictable timeline. Under SDCL § 25-5-18.1, support obligations automatically terminate when the child reaches 18 years of age. However, if the child is still enrolled as a full-time high school student at age 18, support continues until high school graduation or age 19, whichever occurs first. Unlike some states, South Dakota does not require parents to contribute to college expenses unless specifically agreed in the divorce settlement.
Which Is Typically Higher: Alimony or Child Support?
Child support amounts in South Dakota are typically higher than alimony awards because child support follows fixed guideline calculations while alimony is discretionary. For a family with combined monthly net income of $10,000 and one child, the South Dakota guidelines require approximately $1,141 in base child support under SDCL § 25-7-6.2. Alimony awards in comparable situations often range from $500-$2,000 monthly, depending on the factors under SDCL § 25-4-41.
Several factors explain why child support often exceeds alimony in South Dakota divorces:
- Child support guidelines create presumptive amounts that courts must follow unless deviation is justified
- Alimony has no minimum or formula, giving judges discretion to award smaller amounts
- South Dakota courts emphasize self-sufficiency for former spouses but maintain strict child support requirements
- Child support covers housing, food, healthcare, education, and childcare costs
- Alimony addresses only the income gap between spouses, not the full cost of living
However, in high-income divorces involving long-term marriages, alimony may exceed child support. A 25-year marriage where one spouse earned $300,000 annually while the other remained home to raise children may result in substantial permanent alimony to maintain the marital standard of living. The specific amounts depend entirely on the circumstances of each case.
Can Alimony and Child Support Be Modified in South Dakota?
Both alimony and child support can be modified in South Dakota when there is a substantial change in circumstances. Child support modifications under SDCL § 25-7-6.21 typically require a change in income of at least 10% or a significant change in parenting time. Alimony modifications under SDCL § 25-4-41 require showing that circumstances have materially changed since the original order, such as job loss, serious illness, or the receiving spouse's cohabitation with a new partner.
The South Dakota Department of Social Services Child Support Division reviews child support orders every three years upon request, or at any time when a parent demonstrates a substantial change in circumstances. Common grounds for modification include:
- Involuntary job loss or significant income reduction (10% or more)
- Change in the number of overnights each parent exercises
- Child's healthcare or educational needs changing substantially
- Either parent's remarriage affecting household income
- Addition of other children requiring support
- Change in health insurance availability or cost
For alimony modifications, South Dakota courts examine whether the change was foreseeable at the time of the original order. A receiving spouse who was awarded rehabilitative alimony to complete a nursing degree but who instead pursued a different career may face modification if they fail to become self-supporting as anticipated. The burden of proof lies with the party seeking modification to demonstrate changed circumstances.
What Happens to Alimony and Child Support if One Parent Remarries?
Remarriage affects alimony and child support differently under South Dakota law. Alimony typically terminates automatically when the receiving spouse remarries, though some South Dakota divorce decrees specifically address this issue. Child support remains unchanged by either parent's remarriage because the new spouse has no legal obligation to support stepchildren under SDCL § 25-7-6.
South Dakota courts recognize that remarriage fundamentally changes the receiving spouse's financial circumstances. The new spouse's income and support capabilities eliminate the economic disparity that justified the original alimony award. However, the paying spouse must typically file a motion to terminate alimony, as many divorce decrees do not include automatic termination provisions. Courts may also terminate or reduce alimony if the receiving spouse cohabits with a romantic partner in a marriage-like relationship.
Child support calculations in South Dakota focus solely on the biological or adoptive parents' incomes. A new spouse's income is not included when calculating support obligations under SDCL § 25-7-6.3. However, if the remarriage results in additional children, the paying parent may seek modification based on supporting other dependents. South Dakota courts balance the needs of all children a parent is obligated to support.
How Does Shared Parenting Affect Child Support in South Dakota?
South Dakota provides a shared parenting credit under SDCL § 25-7-6.27 that adjusts child support obligations when each parent has at least 180 overnights per year with the child. This 180-overnight threshold represents approximately 49% parenting time. When both parents meet this threshold, the court applies an adjusted calculation that reduces the base support obligation to account for each parent's direct expenditures during their parenting time.
The shared parenting adjustment recognizes that parents exercising substantial parenting time incur significant direct costs for housing, food, transportation, and activities. Without this adjustment, the parent paying support would effectively pay twice for many expenses. South Dakota's approach differs from states using a strict 50/50 calculation, which only adjusts support when parenting time is exactly equal.
For example, if Parent A earns $6,000 monthly net income and Parent B earns $4,000 monthly net income (combined $10,000), and each parent has 182 overnights annually with one child:
- Base support obligation from guidelines: approximately $1,141
- Parent A's share (60%): $685
- Parent B's share (40%): $456
- After shared parenting adjustment: Parent A would pay approximately $229 to Parent B (the difference in proportional obligations)
Are Alimony and Child Support Tax Deductible in South Dakota?
Neither alimony nor child support is tax deductible for the paying spouse under current federal law, and neither constitutes taxable income for the receiving spouse. The Tax Cuts and Jobs Act of 2017 eliminated the alimony deduction for divorce agreements executed after December 31, 2018. South Dakota follows federal tax treatment, having no state income tax that would create separate considerations.
For divorces finalized before January 1, 2019, alimony payments remain deductible for the paying spouse and taxable income for the receiving spouse under the pre-TCJA rules. These grandfathered agreements maintain their original tax treatment unless the parties specifically modify the agreement to follow new tax rules. Child support has never been tax deductible for the paying parent or taxable income for the receiving parent.
Tax implications for South Dakota divorce financial obligations:
| Payment Type | Divorce Before 2019 | Divorce After 2018 |
|---|---|---|
| Alimony - Paying spouse | Deductible | Not deductible |
| Alimony - Receiving spouse | Taxable income | Not taxable |
| Child support - Paying spouse | Not deductible | Not deductible |
| Child support - Receiving spouse | Not taxable | Not taxable |
What Is the Process for Establishing Alimony and Child Support in South Dakota?
South Dakota establishes alimony and child support during divorce proceedings filed in Circuit Court, with a minimum 60-day waiting period before finalization. The filing fee is approximately $95-$97 (including the $50 base fee, $40 automation surcharge, and $7 law library fee as of March 2026). Either spouse may request temporary support during the divorce process, and the court issues final orders as part of the divorce decree.
The process for establishing support follows these steps:
- File a Complaint for Divorce with the Circuit Court Clerk in the county where either spouse resides
- Serve the divorce papers on the other spouse (service costs $50-$75)
- Exchange financial disclosures including income verification, tax returns, and asset statements
- File a proposed parenting plan if children are involved
- Complete child support worksheets using the South Dakota Child Support Obligation Calculator
- Attend mediation if the court requires it or parties agree
- If uncontested, submit a stipulated agreement for court approval
- If contested, attend trial where the judge determines support based on evidence presented
- Receive final divorce decree including alimony and child support orders
South Dakota's residency requirement for divorce is that the filing spouse must be a resident at the time of filing. Unlike many states, South Dakota does not require a specific number of months of residency before filing. However, if the marriage occurred outside South Dakota and neither party resided in the state when married, additional requirements may apply.
Can Parents Agree to Deviate from South Dakota Child Support Guidelines?
South Dakota permits deviation from child support guidelines when both parents agree and the court approves, or when specific circumstances justify deviation under SDCL § 25-7-6.9. Guideline amounts are presumptive, meaning courts must order the calculated amount unless deviation is warranted. Parties cannot simply agree to zero child support, as children have an independent right to support that parents cannot waive.
Permissible grounds for deviation from South Dakota child support guidelines include:
- Extraordinary medical expenses for the child not covered by insurance
- Educational expenses including private school tuition when appropriate
- The child's independent income or assets
- Substantial disparity in living costs between parents' homes
- Financial hardship on either parent that would affect the child's welfare
- Parents sharing custody equally (beyond the 180-overnight threshold)
- Travel expenses for long-distance parenting time
- Child's special needs requiring additional care or equipment
When parents propose a deviation, they must complete a written stipulation explaining the reasons and demonstrating that the deviation serves the child's best interests. The court retains discretion to reject agreed deviations that appear inadequate to meet the child's needs. South Dakota judges scrutinize deviation requests to ensure children receive appropriate financial support regardless of parental agreements.
FAQs About Alimony vs. Child Support in South Dakota
What is the minimum amount of child support in South Dakota?
South Dakota's minimum child support obligation depends on the parents' combined income, with the lowest guideline amount being approximately $254 monthly for one child when combined net income equals $1,200 under SDCL § 25-7-6.2. Courts presume each parent can earn at least minimum wage unless specific exceptions apply under SDCL § 25-7-6.26.
How long do you have to be married to get alimony in South Dakota?
South Dakota has no minimum marriage length requirement for alimony eligibility, though courts rarely award spousal support for marriages under 5 years. Courts under SDCL § 25-4-41 consider marriage duration as one of many factors, with longer marriages (20+ years) more likely to result in permanent alimony awards.
Can a father get alimony in South Dakota?
Yes, South Dakota alimony laws under SDCL § 25-4-41 are gender-neutral, allowing either spouse to receive spousal support. Courts base alimony decisions on financial need and ability to pay, not gender. A father who sacrificed career advancement to support the family may receive alimony from a higher-earning wife.
Does adultery affect alimony in South Dakota?
South Dakota allows no-fault divorce, but marital misconduct including adultery may influence alimony decisions under the court's equitable discretion. Under SDCL § 25-4-41, judges consider all relevant factors, and a spouse who committed adultery may receive reduced alimony or the other spouse may receive enhanced support.
What income is used to calculate child support in South Dakota?
South Dakota uses net monthly income for child support calculations under SDCL § 25-7-6.3, including wages, self-employment income, bonuses, Social Security benefits, and investment income. Courts deduct federal and state taxes, Social Security contributions, and mandatory retirement payments to determine net income.
Can child support be waived in South Dakota?
No, parents cannot waive child support in South Dakota because children have an independent right to financial support from both parents. Under SDCL § 25-7-6, courts must ensure adequate support regardless of parental agreements. Parents may agree to deviate from guidelines, but cannot eliminate support entirely.
How is alimony enforced in South Dakota?
South Dakota enforces alimony through contempt proceedings, wage garnishment, and liens on property. A spouse who fails to pay court-ordered alimony may face fines, jail time, or both under the court's contempt powers. The receiving spouse must file a motion with the court to enforce the order.
Does cohabitation affect alimony in South Dakota?
Yes, cohabitation may reduce or terminate alimony in South Dakota if the receiving spouse's financial circumstances have materially changed due to living with a new partner. Courts examine whether the cohabitation reduces the receiving spouse's need for support, even without remarriage.
What happens to child support if the paying parent loses their job?
A paying parent who loses their job may petition for child support modification under SDCL § 25-7-6.21 based on substantial change in circumstances. The modification is not automatic; the parent must file a motion and prove involuntary job loss. Support continues at the original amount until the court issues a modified order.
Can alimony be paid in a lump sum in South Dakota?
Yes, South Dakota courts may award lump-sum alimony instead of periodic payments when appropriate. Lump-sum awards provide finality and avoid future enforcement issues. Courts consider the paying spouse's ability to make a lump-sum payment and whether periodic payments better serve the receiving spouse's needs.