Calculation
New York: New York uses statutory guideline formulas for temporary and post-divorce maintenance on the payor's income up to the statutory income cap. The formulas are presumptive guideline calculations, but courts may adjust or deviate if the guideline amount is unjust or inappropriate after considering statutory factors. Maintenance above the income cap is discretionary. South Dakota: Conservative educational estimate based on need, ability to pay, income disparity, marriage length, earning capacity, post-divorce financial condition, age, health, marital standard of living, property division, and South Dakota equitable factors; no mandatory statewide formula applies.
Duration
New York: New York uses a nonmandatory advisory duration schedule for post-divorce maintenance. For marriages up to and including 15 years, guideline duration is generally 15% to 30% of the marriage length. For marriages over 15 years and up to 20 years, guideline duration is generally 30% to 40% of the marriage length. For marriages over 20 years, guideline duration is generally 35% to 50% of the marriage length. Temporary maintenance lasts only while the divorce case is pending. South Dakota: South Dakota has no fixed statutory duration formula. Temporary alimony may be awarded while the divorce is pending. Post-divorce alimony may be rehabilitative, restitutional, permanent, or another equitable form depending on the facts. Rehabilitative support may be time-limited and tied to education, training, or self-support. Permanent or longer-term support may be possible where age, disability, health, or long-term dependency prevents self-support, but it is not automatic.
Modification
New York: Maintenance orders may be modified when statutory standards for modification are satisfied, including qualifying changes in circumstances. Separation agreements and judgments may contain additional provisions affecting modification rights. South Dakota: South Dakota alimony may be modified when a substantial change in circumstances justifies review, depending on the award type and decree terms. Courts evaluate changes affecting need, income, earning capacity, health, or ability to pay.