The circuit court may modify its judgment respecting alimony on petition showing changed circumstances affecting need or ability to pay. That is what separates South Dakota modifying alimony from a generic national summary. Read SDCL § 25-4-45 before the background sections below. Property division in the judgment is final; only ongoing alimony payments can be modified. Death of either party, remarriage of the recipient (where provided), or the term fixed in the judgment.
Grounds that most often succeed
- Retirement. Many states now treat reaching full retirement age as a presumptive or statutory ground. Early or voluntary retirement is scrutinized: courts ask whether it was in good faith, whether it was foreseeable at divorce, and whether the recipient had a chance to save.
- Involuntary income loss. Layoffs, business failure, disability, or industry collapse — with proof of diligent job-seeking. Voluntary underemployment is commonly met with income imputation instead of relief.
- The recipient's changed need. Improved earnings, remarriage-adjacent cohabitation, an inheritance, or reduced expenses.
- Health changes. New disability or extraordinary medical costs on either side.
- Cohabitation. Death of either party, remarriage of the recipient (where provided), or the term fixed in the judgment.
Grounds that rarely work: a new partner's income without statutory cohabitation, ordinary inflation, the payor's new family expenses standing alone, or a temporary dip in earnings.
Cohabitation and remarriage
Death of either party, remarriage of the recipient (where provided), or the term fixed in the judgment.
Cohabitation cases are intensely fact-driven: shared finances, shared household expenses, the relationship's public character, and its duration all matter. South Dakota procedure requires proof — surveillance or speculation is not enough, and the recipient gets discovery and a hearing before payments stop. Until a court order issues, keep paying.
Step-by-step: how to file
- Read the decree and any incorporated agreement. Property division in the judgment is final; only ongoing alimony payments can be modified. Confirm the court retained jurisdiction to modify.
- Confirm the forum. Modification goes to a petition to modify filed in the circuit court that entered the judgment. If a party has moved away, UIFSA and registration rules determine where the petition belongs.
- Gather evidence dated to the change. Termination notices, disability awards, pension and Social Security statements, tax returns, medical records, or evidence of the recipient's cohabitation.
- File and serve promptly. Prospective from the petition.
- Exchange financial disclosure. Many courts require updated financial affidavits; self-employment cases often add forensic accounting or a vocational expert.
- Seek temporary relief if needed. Where circumstances are dire, ask the court for interim reduction or suspension pending the full hearing — South Dakota judges can grant temporary remedies in appropriate cases.
- Litigate, mediate, or stipulate. A settlement must be reduced to an order and entered before payment obligations change.
A concrete South Dakota scenario
Here is one way the South Dakota pieces fit together. Change any fact and the statute may point somewhere else.
A former spouse in South Dakota asks to change periodic alimony after retirement or a drop in income.
- File a petition to modify filed in the circuit court that entered the judgment.
- Match the facts to the South Dakota standard: The circuit court may modify its judgment respecting alimony on petition showing changed circumstances affecting need or ability to pay.
- Check whether this award can be modified at all: Property division in the judgment is final; only ongoing alimony payments can be modified.
- If the request is to end support, prove a trigger: Death of either party, remarriage of the recipient (where provided), or the term fixed in the judgment.
Prospective from the petition. The forum is the circuit court (referee hearings common), or the Division of Child Support.
When the change takes effect
Prospective from the petition.
The corollary: unilaterally reducing or stopping payments before an order issues builds arrears, interest, and contempt exposure — even if you ultimately win the modification.
Awards that cannot be modified (or are hard to change)
Property division in the judgment is final; only ongoing alimony payments can be modified.
Common traps:
- Lump-sum or property-division awards styled as alimony are usually final when entered.
- Agreement language that waives modification binds the parties even though the statute would allow a petition.
- Expired terms — once a fixed term lapses, most states will not revive it; a timely pre-expiration motion is critical.
- Jurisdiction reservations — in some states, if the decree did not expressly reserve jurisdiction to modify, no later court can.
Case law: how South Dakota courts decide alimony modification
These LawDiver opinions show how South Dakota appellate courts weigh changed circumstances, retirement, and cohabitation:
William A. TESCH, Plaintiff and Appellant, v. Betty L. TESCH, Defendant and Appellee
…orally amend her pleadings at trial to include requests for alimony and attorney’s fees over his objections; (2) granted his wife a divorce and denied same to him; (3) ordered him to pay $360 a month in child support; and (4) ordered him to pay $125 a month (for twenty-four months) in alimony. We treat these issues seriatim. We affirm. FACTS William and Betty Tesch were married…
On alimony modification, William A. TESCH, Plaintiff and Appellant, v. Betty L. TESCH, Defendant and Appellee speaks to the South Dakota dispute in this passage: "We treat these issues seriatim. We affirm." The surrounding opinion shows how the court applied that language to the record.
Michael J. WHALEN, Appellant, v. Dianne M. WHALEN, Appellee
Michael J. WHALEN, Appellant, v. Dianne M. WHALEN, Appellee, 1992 S.D. LEXIS 123 (1992)
…nts were to continue for the balance of the seven years as “alimony.” Under the supplemental decree the Husband was awarded his interest (50%) in the law office, subject to the debt; the parties’ home, subject to the debt; and his vehicles, subject to the debt. Husband had a small amount of furniture. Wife received the bulk of the parties’ household goods, furnishings, and furn…
On alimony modification, Michael J. WHALEN, Appellant, v. Dianne M. WHALEN, Appellee speaks to the South Dakota dispute in this passage: "Under the supplemental decree the Husband was awarded his interest (50%) in the law office, subject to the debt; the parties’ home, subject to the debt; and his vehicles, subject to the debt. Husband had a small amount of furniture." The surrounding opinion shows how the court applied that language to the record.
T. Denny SANFORD, Plaintiff and Appellee, v. Colleen Anderson SANFORD, Defendant and Appellant
…he prenuptial agreement purported to waive all of Colleen’s alimony rights and provided for a single payment structure for alimony, support and property provisions. [¶ 2.] On competing motions for summary judgment, the circuit court held the single prenuptial agreement provision purporting to waive alimony was void and unenforceable. The circuit court also held the agreement wa…
On alimony modification, T. Denny SANFORD, Plaintiff and Appellee, v. Colleen Anderson SANFORD, Defendant and Appellant speaks to the South Dakota dispute in this passage: "Colleen’s alimony rights and provided for a single payment structure for alimony, support and property provisions. [¶ 2." The surrounding opinion shows how the court applied that language to the record.
Ann ROUSSEAU, Plaintiff and Appellant, v. Gerald GESINGER, Defendant and Appellee
…st Gerald Gesinger (Gesinger), appel-lee, for nonpayment of alimony. The trial court amended the decree of divorce by eliminating alimony and denied Rousseau’s subsequent motion for a new trial. Rousseau appeals and we reverse and remand. Rousseau and Gesinger were divorced on March 8, 1978, after almost twenty-five years of marriage. The couple agreed that Rousseau would have…
On alimony modification, Ann ROUSSEAU, Plaintiff and Appellant, v. Gerald GESINGER, Defendant and Appellee speaks to the South Dakota dispute in this passage: "Gerald Gesinger (Gesinger), appel-lee, for nonpayment of alimony. The trial court amended the decree of divorce by eliminating alimony and denied Rousseau’s subsequent motion for a new trial. Rousseau appeals and we reverse and remand." The surrounding opinion shows how the court applied that language to the record.
Donald R. BALTZER, Plaintiff and Appellant, v. Joan C. BALTZER, Defendant and Appellee
…y and the award of attorney fees but reverse in part on the alimony award. STATEMENT OF FACTS Donald and Joan were married January 23, 1976, in Sioux Falls, South Dakota. No children were born of this tumultuous marriage. At the time of trial, Donald was 48 years of age and Joan was 43. With the exception of some minor health problems of Joan’s, both parties were in good health…
Practitioners open Donald R. BALTZER, Plaintiff and Appellant, v. Joan C. BALTZER, Defendant and Appellee when South Dakota alimony modification turns on the distinction in this sentence: "STATEMENT OF FACTS Donald and Joan were married January 23, 1976, in Sioux Falls, South Dakota. No children were born of this tumultuous marriage. At the time of trial, Donald was 48 years of age and Joan was 43." Do not lift it out of the facts the court was deciding.
Annette MacKABEN, Plaintiff and Appellee, v. Everett Thomas MacKABEN, Jr., Defendant and Appellant
…ortgage debt and Annette pay half of the mortgage debt with alimony that Tom paid to her[.]” [¶ 28.] As Tom points out, we reviewed an analogous property division in Foley v. Foley, 429 N.W.2d 42 (S.D.1988). In Foley, a husband and wife divorced, and the circuit court ordered the husband to make monthly payments of $518 for “the house payment, consisting of principal, interest…
Annette MacKABEN, Plaintiff and Appellee, v. Everett Thomas MacKABEN, Jr., Defendant and Appellant is worth reading on South Dakota alimony modification because the court put the point in its own words: "Annette pay half of the mortgage debt with alimony that Tom paid to her[.]” [¶ 28.] As Tom points out, we reviewed an analogous property division in Foley v. Foley, 429 N.W.2d 42 (S.D.1988)." Use that passage as the starting point, then read the facts that precede it.
Phyllis F. PARADEIS, Plaintiff and Appellant, v. Donald L. PARADEIS, Defendant and Appellee
…upon Donald Paradeis’ (Donald) delinquency in the making of alimony payments. On May 26, 1989, the Court heard evidence relating to this matter. The Court determined that monies Phyllis had received from Donald after their divorce would be considered alimony and not a loan, relieving Donald of any alimony ar-rearages and that alimony would cease in this matter. On appeal Phylli…
Practitioners open Phyllis F. PARADEIS, Plaintiff and Appellant, v. Donald L. PARADEIS, Defendant and Appellee when South Dakota alimony modification turns on the distinction in this sentence: "Donald Paradeis’ (Donald) delinquency in the making of alimony payments. On May 26, 1989, the Court heard evidence relating to this matter." Do not lift it out of the facts the court was deciding.
Practical checklist before you file
- Identify which type of alimony your decree awards — the modification rules differ by type.
- Confirm the decree or agreement does not bar modification.
- Document the change with third-party records, not just testimony.
- For retirement motions: assemble pension statements, Social Security estimates, the divorce-era financial disclosures, and evidence of good faith.
- For cohabitation petitions: gather admissible evidence and expect a discovery fight and an evidentiary hearing.
- Keep paying until the new order is signed; calendar the effective-date rules under SDCL § 25-4-45.
- Search LawDiver for recent South Dakota appellate decisions before filing.
Key takeaways
- South Dakota calls these payments alimony, governed for modification purposes by SDCL § 25-4-45.
- The legal standard: The circuit court may modify its judgment respecting alimony on petition showing changed circumstances affecting need or ability to pay.
- Prospective from the petition.
- Termination events: Death of either party, remarriage of the recipient (where provided), or the term fixed in the judgment.
- Property division in the judgment is final; only ongoing alimony payments can be modified.
- File in petition to modify filed in the circuit court that entered the judgment — do not wait: Prospective from the petition.
- Companion reading: South Dakota alimony guide and how to modify child support in South Dakota.
The legal standard in South Dakota
The circuit court may modify its judgment respecting alimony on petition showing changed circumstances affecting need or ability to pay.
Courts start from the decree, not from scratch. The judge asks what the parties and the court knew when alimony was set, what has changed since, and whether the change is significant and durable enough to make the existing terms unreasonable. The moving party carries the burden, and documentation — tax returns, pension statements, medical records, lease agreements — decides most of these cases.
Frequently asked questions
Can alimony be modified in South Dakota?
Yes, in most cases. The circuit court may modify its judgment respecting alimony on petition showing changed circumstances affecting need or ability to pay.
Does retirement end alimony in South Dakota?
Retirement can support modification where it produces a genuine, good-faith reduction in ability to pay, but it is not automatic. South Dakota courts weigh the timing, health, and foreseeability of the retirement under SDCL § 25-4-45.
Does my ex's cohabitation stop alimony?
Death of either party, remarriage of the recipient (where provided), or the term fixed in the judgment. You must petition the court and prove the statutory elements — the obligation does not end by operation of the new relationship alone until a judge so orders (unless South Dakota's statute makes termination automatic on remarriage).
Can alimony be increased?
Yes, where the statute permits. Recipients who prove a material increase in need — often medical — can seek upward modification, subject to the payor's ability to pay.
Can South Dakota courts modify alimony retroactively?
Prospective from the petition.
What if my alimony was set by agreement?
Property division in the judgment is final; only ongoing alimony payments can be modified. Agreements matter: read the incorporated terms before assuming a petition will be heard on ordinary changed-circumstances grounds.
Related guides
- How South Dakota calculates child support
- South Dakota alimony / alimony guide
- How to modify alimony in South Dakota
- How to modify child support in South Dakota
Disclaimer
This guide is general legal information about modifying alimony in South Dakota, not legal advice. Statutes and case law change. Confirm the current text of SDCL § 25-4-45 and consult a licensed South Dakota family-law attorney about your decree before filing or changing payments.