50/50 Custody in Virginia: Do You Still Pay Child Support?

Yes, parents with 50/50 custody in Virginia can still owe child support. Virginia uses an income-shares model, and its shared custody formula multiplies the basic support obligation by 1.4 to reflect the cost of running two full households, then splits that figure by each parent’s income percentage. When one parent earns more, the math produces a net payment from the higher earner to the lower earner, even when the children spend equal nights in each home.

Why Equal Time Doesn’t Mean Zero Support

Virginia’s shared custody formula applies whenever the parent with fewer days has the child for more than 90 days a year.¹ A true 50/50 split puts each parent at roughly 182.5 days, so the shared formula always governs.

The formula assumes both homes are fully equipped: beds, food, utilities, clothing, the works. That’s why the statute inflates the basic obligation by 40% before dividing it between the parents. But equal time doesn’t equalize incomes, and child support is designed to keep the child’s standard of living comparable in both homes. If one parent earns noticeably more, the guideline shifts money toward the lower-earning household so the child isn’t living two very different lives on alternating weeks.

One safeguard sits inside the statute. If running the sole custody formula would produce a lower support number than the shared formula, the court uses the lower amount.¹ The shared formula can’t accidentally inflate what you owe past the sole custody baseline.

How the Shared Custody Calculation Works

The core steps:

Add both parents’ monthly gross incomes and look up the basic support obligation for that combined income and the number of children on the schedule in Virginia Code § 20-108.2.
Multiply that basic obligation by 1.4. This is the shared support need.¹
Figure each parent’s custody share by dividing their days by 365. In a 50/50 split, each is 50%.
Figure each parent’s income share by dividing their income by the combined total.
Multiply the shared support need by the other parent’s custody share. Add the other parent’s spending on the child’s health coverage and work-related childcare. Multiply the result by each parent’s income share to get their obligation.
Subtract the smaller obligation from the larger. The parent with the bigger number pays the difference.

A Worked Example

Two parents, one child, equal custody time, combined monthly gross income of $10,000. Parent A earns $6,000 (60% income share); Parent B earns $4,000 (40%). Suppose the schedule sets the basic obligation at about $1,000. Multiplying by 1.4 produces a shared support need of $1,400.

Each parent’s basic amount is $1,400 times the other parent’s 50% custody share, or $700. Add in the other parent’s health insurance and childcare costs, then multiply the total by each parent’s income share. Because Parent A’s 60% is applied to their side and Parent B’s 40% to theirs, Parent A’s obligation comes out larger. Parent A pays Parent B the difference each month. The pattern holds across most 50/50 cases: unequal income, equal time, and the higher earner writes the check.

What Income the Court Uses

Virginia defines gross income broadly. Salaries, wages, commissions, bonuses, dividends, severance, pensions, interest, trust income, annuities, capital gains, Social Security, workers’ compensation, unemployment, disability, veterans’ benefits, spousal support received, rental income, and gifts, prizes, or awards all count.¹

Excluded: public assistance, federal SSI, child support received from another case, and income from a second job taken specifically to pay off a child support arrearage under a court order. Self-employed parents can deduct reasonable business expenses, but not acquisition costs, depreciation, or mortgage principal on rental properties. Half of self-employment tax paid is also deductible. Spousal support paid under an order or written agreement is subtracted from the payer’s gross income and added to the recipient’s.

If a parent is voluntarily unemployed or underemployed, the court can impute income based on what they could reasonably earn and run the formula on that figure.² Quitting a job or cutting hours won’t reduce an obligation.

Running the Numbers on Form DC-640

Virginia’s shared custody worksheet is Form DC-640, available from the Virginia Judicial System website or a court clerk.³ The form carries you through each step: gross income for each parent, available income after allowed deductions, basic obligation from the statutory schedule, the 1.4 multiplier on Line 16, custody days on Lines 17 and 18, and a net payment on Line 31.

Convert everything to monthly figures before entering it. Multiply weekly amounts by 4.33 and biweekly amounts by 2.167. Round to the nearest dollar. For health insurance, use only the portion of the premium attributable to the child, not the full family plan. Childcare numbers need documentation. Bring pay stubs, tax returns, insurance statements, and provider receipts to any hearing; the court will verify.

When a Judge Can Change the Guideline Number

The guideline amount is presumed correct. A judge can order a different number only after finding the guideline result would be unjust or inappropriate, and the order has to state what the guideline figure was and explain the departure.²

The statute lists factors a court can weigh, including support obligations to other children or former spouses, visitation travel costs when parents live far apart, a child’s special physical, emotional, or medical needs, a child’s own income or assets, the standard of living during the marriage, debts incurred for the child’s benefit, tax consequences of exemptions and credits, and property division that gave one parent income-producing assets.

Deviation is uncommon in routine 50/50 cases. It becomes a real conversation when the income gap is severe, a child has unusual costs, or one parent is absorbing travel expenses the other isn’t.

Costs That Sit Outside the Monthly Payment

Unreimbursed medical and dental expenses are shared separately in proportion to each parent’s gross income, not folded into the Line 31 number.¹ The statute reaches eyeglasses, prescriptions, prosthetics, orthodontics, and mental health or developmental disability services provided by a social worker, psychologist, psychiatrist, counselor, or therapist. Make sure the support order spells out how these bills get documented and reimbursed before it’s finalized.

Child support itself is tax-neutral: the payer can’t deduct it, the recipient doesn’t report it as income. The dependency claim is where tax questions actually bite in a 50/50 case. When custody time is equal, the IRS tiebreaker gives the dependency claim to the parent with the higher adjusted gross income.⁴ That parent takes the child tax credit, which is $2,200 per child as of 2025 and inflation-adjusted beginning in 2026. If parents want to alternate years or hand the claim to the lower-earning parent, the custodial parent under the tiebreaker signs IRS Form 8332 releasing the claim, and the other parent attaches it to their return. Some couples build an alternating-year arrangement into the support order; Virginia courts can also weigh tax consequences as a deviation factor.

Changing the Amount Later

Either parent can petition to modify a support order when there’s a material change in circumstances: a significant income change, a job loss, a new custody arrangement, or a shift in the child’s needs.⁵ Federal rules also give either parent the right to request a review at least every three years.⁶

Shared custody has its own modification trigger. If a parent consistently fails to use their custody time, there’s a rebuttable presumption that the support amount should change.¹ The entire shared formula depends on both parents actually taking the days the schedule assumes. A parent allotted 182 days but only taking 120 is leaving the other parent to carry costs the formula never built in.

Modifications aren’t retroactive. Any change dates from when the other parent was served with the petition, so file as soon as circumstances shift rather than waiting to see how things settle.

1
Virginia Code Commission. Virginia Code 20-108.2 – Guideline for Determination of Child Support
2
Virginia Code Commission. Virginia Code 20-108.1 – Determination of Child or Spousal Support
3
Virginia Judicial System. Form DC-640 – Child Support Guidelines Worksheet – Shared Custody
4
Internal Revenue Service. Qualifying Child Rules
5
Virginia Code Commission. Virginia Code 20-108 – Revision and Alteration of Such Decrees
6
Office of Child Support Services (Administration for Children & Families). Changing a Child Support Order