Modifying Child Support or Alimony in Florida: When and How

By Nadia Pazos, Family Law Attorney, Pazos Law Group · May 2026  ·  ← All blog posts

Life changes after a divorce. Income changes, jobs change, children grow up, and circumstances shift. Florida law allows child support and alimony to be modified — but only when there’s a substantial change in circumstances.

A divorce judgment isn’t always the final word. Florida law recognizes that life changes and provides a process for modifying both child support and most types of alimony when circumstances substantially change. This article explains when modification is possible, what counts as a “substantial change,” and how the process works.

The Substantial Change Standard

To modify child support or alimony in Florida, the party seeking modification must generally show:

• A substantial change in circumstances;
• That the change is material;
• That the change was not contemplated by the parties at the time of the original order; and
• That the change is permanent rather than temporary.

This four-part test is intentionally high. Florida courts want stability in family law orders. Minor or temporary changes don’t qualify.

Modifying Child Support

Child support modifications are governed by Fla. Stat. § 61.30 and Florida case law. The most common grounds for modification:

1. Change in income

A substantial increase or decrease in either parent’s income. Florida case law generally treats a 15% change in the calculated child support amount as substantial. Smaller changes typically don’t qualify.

2. Change in time-sharing

If the time-sharing schedule materially changes (for example, one parent now has the children significantly more or less than before), child support recalculation is appropriate.

3. Change in the child’s needs

Major changes in the child’s needs — medical conditions, special education requirements, or extracurricular costs — can justify modification.

4. New children

If a paying parent has a new child, support may be recalculated to account for the obligation to support that child as well.

5. Reaching adulthood

Florida child support generally terminates when the child turns 18 (or graduates from high school, up to age 19). When one of multiple children ages out, support for the remaining children typically needs recalculation.

Modifying Alimony

Most types of Florida alimony can be modified, but the rules differ by type. After Florida’s 2023 alimony reform, the categories are:

Bridge-the-gap alimony

Not modifiable. Bridge-the-gap alimony is fixed in amount and duration.

Rehabilitative alimony

Modifiable on a substantial change in circumstances or noncompliance with the rehabilitation plan.

Durational alimony

Amount is generally modifiable on a substantial change in circumstances. Duration is more difficult to modify but possible in limited circumstances.

Temporary alimony

Modifiable during the divorce by motion as circumstances change.

Common Grounds for Alimony Modification

1. Change in income

Substantial, permanent change in either party’s income. Loss of employment, promotion, retirement, or business changes can all qualify.

2. Retirement of paying spouse

The 2023 alimony reform clarified that the paying spouse’s reaching normal retirement age can be grounds for modification or termination, subject to a fact-specific analysis.

3. Cohabitation by recipient

Under Fla. Stat. § 61.14(1)(b), alimony can be modified or terminated if the receiving spouse is in a “supportive relationship.” Florida courts apply a multi-factor test. Cohabitation alone isn’t enough; the relationship must include shared finances and the indicia of marriage.

4. Recipient’s improved circumstances

If the receiving spouse’s financial situation has improved substantially — through inheritance, new employment, or other means — reduction or termination may be appropriate.

5. Disability or health change

Major health changes affecting either party’s ability to pay or earn can support modification.

What Generally Cannot Be Modified

• Bridge-the-gap alimony — not modifiable by statute.
• Voluntary income reductions. If a paying spouse voluntarily quits a job or accepts a lower-paying position, courts often impute income at the prior level rather than reduce support.
• Lump-sum or property settlements. Property division in the original judgment is final and cannot be modified absent fraud.
• Equitable distribution. Florida law treats equitable distribution as a final resolution.

The Modification Process

1. File a Supplemental Petition for Modification in the same court that entered the original order.
2. Serve the other party.
3. Exchange financial documents under Florida Family Law Rule of Procedure 12.285.
4. Discovery as needed: depositions, subpoenas, expert reports.
5. Mediation — required in most contested cases in Miami-Dade.
6. Hearing or trial if no agreement is reached.
7. Court order modifying or denying modification.

Are Modifications Retroactive?

Florida child support modifications can generally be retroactive only to the date of filing the petition for modification. Alimony modifications are similarly limited. This means delay costs money — if circumstances have changed, file promptly.

The Bottom Line

Florida child support and most alimony orders can be modified when circumstances substantially, materially, and permanently change. The standard is high but achievable in real-world situations like job loss, retirement, custody changes, or remarriage. If your circumstances have changed significantly since your original judgment, an early consultation with a family law attorney can help you understand whether modification is realistic in your situation.

Frequently Asked Questions

The information on this page is for general informational purposes only and does not constitute legal advice. Reading or sharing this content does not create an attorney-client relationship with Pazos Law Group. Florida law and the application of statutes change over time; please consult a licensed Florida attorney about your specific situation.