One-off formation costs
The state filing fee for the articles of organization is the unavoidable one. On top of it come name reservation, certified copies and, in a few states, a newspaper publication requirement that can cost hundreds of dollars on its own.
A formation service or an attorney adds a flat fee, a business licence or local permit adds another, and a bank account may need a minimum deposit. The federal employer identification number (EIN) is free when you apply directly with the IRS.