How Virginia Calculates Child Support
Virginia uses the Income Shares model for child support. The governing law is Virginia Code Section 20-108.2, along with the Virginia Child Support Guidelines. Virginia uses gross income as the basis for its calculation and combines both parents' incomes to determine the total obligation. Each parent then contributes their proportional share.
Virginia measures parenting time in days rather than overnights in some contexts, and applies its shared custody calculation when each parent has at least 90 days of custody per year. Understanding Virginia's day-based threshold is essential to reading your estimate correctly.
The Virginia Child Support Formula
Virginia's calculation follows four steps.
Step one is determining each parent's monthly gross income. Step two is combining both gross incomes to produce the combined monthly gross income. Step three is finding the Basic Child Support Obligation in Virginia's schedule using the combined income and number of children. Step four is calculating each parent's income share percentage and applying it to the obligation.
A practical example: Parent A earns $5,000 per month. Parent B earns $2,500 per month. Combined income is $7,500. Parent A's income share is 66.7 percent. If Virginia's schedule sets the Basic Child Support Obligation at $1,300 for two children at $7,500 combined income, Parent A's base obligation is $867 per month before parenting time adjustments and add-ons.
Virginia has two distinct formulas: one for sole custody situations and one for shared custody situations. The shared custody formula applies when each parent has at least 90 days of custody per year.
What Counts as Income in Virginia
Virginia uses a broad income definition under Section 20-108.2. Courts include wages, salaries, commissions, bonuses, overtime, self-employment income, rental income, pension and retirement distributions, Social Security benefits, SSDI payments, workers' compensation, unemployment compensation, and income from any other regular source.
Courts can impute income to a parent who is voluntarily unemployed or underemployed based on work history, education, skills, and the local job market.
Virginia allows deductions from gross income before combining incomes: court-ordered child support currently being paid for children from other relationships and court-ordered spousal support from prior orders. These deductions reduce each parent's adjusted gross income before the proportional shares are calculated.
Virginia excludes needs-based public assistance from the income calculation.
Step-by-Step: How to Use This Calculator
Step 1. Get your gross monthly income. Include wages, self-employment income, rental income, and any other regular source. Gross means before Virginia state income taxes (which range from 2 percent to 5.75 percent) and before federal taxes and other deductions.
Step 2. Subtract existing court-ordered obligations (child support or spousal support from prior orders) from your gross income.
Step 3. Estimate the other parent's adjusted gross monthly income using the same method.
Step 4. Count your custody days per year. Virginia uses days of physical custody to determine whether the shared custody formula applies. Count the number of days, including overnights, that you have the children per year. If each parent has at least 90 days, the shared custody calculation applies. Divide your days by 365 to enter your percentage.
Step 5. Enter the number of children covered by this order.
Step 6. Add healthcare costs. Enter the monthly premium for the children's health insurance.
Step 7. Add childcare costs. Enter monthly work-related childcare expenses.
Step 8. Review the breakdown and confirm which formula was applied based on your day count.
Parenting Time Adjustments in Virginia
Virginia's shared custody formula applies when each parent has at least 90 days of custody per year, approximately 24.7 percent of the year. This is one of the lower thresholds among Income Shares states, meaning more Virginia parents qualify for the shared custody calculation.
Below 90 days for either parent, the sole custody formula applies and the paying parent contributes their income share directly to the receiving parent with no automatic reduction.
At 90 days and above for each parent, Virginia applies its shared custody formula. This calculation accounts for both parents' direct spending during their respective custody time. Each parent's obligation is calculated based on income share and custody percentage. The higher earner pays the net difference to the lower earner.
The 90-day threshold is a firm line in Virginia. Moving from 89 to 90 days triggers the shared custody formula. If your custody arrangement puts you near that mark, counting actual days matters. Virginia courts count a day of custody as any period in which the parent has the child, including overnights.
At near-equal custody with meaningful income differences, a net payment still flows from the higher earner to the lower earner. Equal days do not eliminate child support when one parent earns significantly more.
Add-On Expenses in Virginia
Virginia adds healthcare premiums and work-related childcare costs to the base obligation, allocated proportionally by income share. Courts may also address extraordinary medical expenses and educational costs on a case-by-case basis.
Virginia courts can address transportation costs for parenting time in long-distance arrangements, particularly when one parent has relocated. Significant travel costs may be allocated between the parents or factored into a deviation.
Reading Your Results
The results display shows each parent's adjusted gross income, combined gross income, the Basic Child Support Obligation from Virginia's schedule, which formula was applied, income share percentages, the shared custody adjustment if applicable, add-on costs, and the final monthly obligation.
Confirm which formula was applied. If your day count is near 90, verify it was correctly entered. A single day's difference near that threshold determines whether the sole or shared custody formula applies, and that choice can shift the monthly obligation by several hundred dollars at typical income levels.
After You Get Your Estimate
Virginia courts follow the Section 20-108.2 guidelines in all standard cases. Deviation is allowed when the guideline amount would be unjust or inappropriate based on written findings. Courts consider both parents' financial resources, the child's specific needs, travel costs, and any special circumstances.
Modification in Virginia requires a material change in circumstances. A 25 percent or more change in the calculated obligation, or any change in the custody or visitation arrangement, is grounds for modification. A shift in custody days past or below the 90-day shared custody threshold is one of the most impactful changes a parent can demonstrate.
A licensed Virginia family law attorney can confirm which formula applies to your arrangement and advise on modification options. Many offer a free initial consultation.