Quick answer: Child support modification in Virginia turns on a material change in circumstances; the statute sets no percentage. Incarceration of 180 or more consecutive days counts as one. A modification can reach only the period a petition is pending, from the date notice of the petition was given, so support already due cannot be changed.
This Virginia child support modification calculator applies Va. Code 20-108. Enter your current order and the amount the guidelines give today (you can get it from the Virginia child support calculator), say whether a material change or a 180-day incarceration applies, and it shows where you stand and what the gap adds up to.
Virginia child support modification at a glance
| Rule | What Virginia says |
|---|---|
| Authority | The court may revise support as the circumstances of the parents and the benefit of the children may require, on petition of either parent, its own motion or the Department of Social Services (Va. Code 20-108) |
| Standard | A material change in circumstances; no percentage in the statute (20-108; 20-108.2) |
| Incarceration | Incarceration of 180 or more consecutive days is a material change and not voluntary unemployment (20-108.1) |
| Other children | Financial responsibility for another child is not of itself a material change (20-108.2) |
| Shared custody | If a parent consistently fails to use his or her custody share, there is a rebuttable presumption the award should be modified (20-108.2) |
| Start date | No retroactive modification; only for the period a petition is pending, from the date notice of the petition was given (20-108) |
How does child support modification work in Virginia?
- Know the standard. See what counts as a material change in Virginia.
- File and give notice. See how to modify child support in Virginia.
- Income problems and incarceration. See child support after job loss or incarceration in Virginia and, for what stays owed, the Virginia child support arrears calculator.
What does this modification calculator check?
The calculator shows the monthly gap against the guideline amount and the accrued difference from notice, and applies the statutory 180-day incarceration rule. Because Virginia has no percentage test, it cannot say whether a court will find your change material.
Frequently asked questions
What do I have to show to modify Virginia child support?
A material change in circumstances; the statute sets no percentage.
Does a 10% or 20% change modify Virginia child support?
The statute sets no percentage; the court decides whether the change is material.
From what date can Virginia change child support?
Only for the period a petition is pending, from the date notice of the petition was given to the other party.
Does incarceration count as a change in Virginia?
Incarceration for 180 or more consecutive days is a material change in circumstances.
Does a new child modify Virginia child support?
Financial responsibility for another child is not of itself a material change.
Official sources
- Va. Code 20-108: revision of decrees; no retroactive modification
- Va. Code 20-108.1: determination of support; incarceration
- Va. Code 20-108.2: guideline; shared custody; material change limits
- 42 U.S.C. 666(a)(9): no retroactive modification of support already due
- 45 CFR 302.56: federal guideline requirements