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. Mississippi: Conservative educational estimate based on need, ability to pay, income disparity, marriage length, earning capacity, health, standard of living, property division, fault or misconduct where relevant, and Mississippi equitable 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. Mississippi: Mississippi has no fixed statutory duration formula. Periodic alimony may continue until death of either party, remarriage of the recipient, qualifying cohabitation, material modification, or further court order. Lump-sum alimony is a fixed vested amount and generally is not modifiable. Rehabilitative alimony is usually time-limited and tied to education, training, employment, or transition to self-support. Reimbursement alimony may compensate one spouse for economic contributions to the other spouse's career, education, or earning capacity.
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. Mississippi: Periodic alimony may generally be modified upon a material change in circumstances. Lump-sum alimony is typically treated as fixed and nonmodifiable once awarded.