Virginia law has a chart that determines support. It is based on the amount of income you both have and the number of children. The courts typically apportion it based on how much money each person makes. See section 20-108.2 of the Code of Virginia for complete information on the amount and the Department of Social Services' calculator for information.
[This communication is intended as general information and not specific legal advice, and this communication does not create an attorney-client relationship.]
The court will consider your income, her income, the cost of health insurance, and the cost of childcare, if any. You can ask the court to deviate from the guidelines based on your additional financial contributions.
If you have questions, it is always a good idea to meet with a family law attorney at least for 1 consultation so that you can get advice specific to your situation.