Starting a business and child support

It depends upon what kind of business format you are using.  If you start a Corporation, and you are paying yourself and your partner salaries, as employees of the Corporation, then your obligations for child support arrears may be subject to which garnishments that may require the company to pay any wage garnishment.  If you have a general partnership, there may be a risk of your parties interest being affected.  So long as the business is a separate entity, your interest in the business may be affected, your salary paid by the business may be affected, but your partner's interests, subject only to perhaps being reviewed in an effort to collect or enforce as against you, should remain unaffected.