Calculation
Florida: Florida no longer awards permanent alimony for initial petitions governed by the current statute. Courts may award temporary, bridge-the-gap, rehabilitative, or durational alimony only after making specific factual findings that the requesting spouse has actual need and the other spouse has ability to pay. Durational alimony is capped at reasonable need or 35% of the parties' net-income difference, whichever is less. Montana: Conservative educational estimate based on statutory eligibility, reasonable need, ability to pay, income disparity, marriage length, marital standard of living, property division, earning capacity, education or training needs, age, health, and Montana statutory factors; no mandatory statewide formula applies.
Duration
Florida: Florida classifies marriages as short-term if less than 10 years, moderate-term if 10 to less than 20 years, and long-term if 20 years or more. Bridge-the-gap alimony may not exceed 2 years. Rehabilitative alimony may not exceed 5 years and requires a specific rehabilitative plan. Durational alimony may not be awarded after a marriage lasting less than 3 years. Durational alimony may not exceed 50% of a short-term marriage, 60% of a moderate-term marriage, or 75% of a long-term marriage, except under exceptional circumstances proven by clear and convincing evidence. Montana: Montana has no fixed statutory duration formula. Maintenance may be temporary during the case, rehabilitative or transitional for a defined period, or longer-term where need, age, health, disability, long-term dependency, or limited earning capacity justify it. Duration depends on reasonable need, ability to pay, time needed for education or training, marriage length, property division, and the court's equitable judgment.
Modification
Florida: Most alimony awards may be modified upon a substantial, material, and unanticipated change in circumstances. The party requesting modification must demonstrate that the statutory standard has been satisfied. Montana: Montana maintenance may be modified under Mont. Code Ann. § 40-4-208 when statutory modification standards are met. Courts review changed circumstances affecting need, resources, employment, health, or ability to pay.