How does a spend control solution help reduce costs? A How does a spend control solution help reduce costs? Setting spending controls and approval processes helps you stop unnecessary expenses before they happen. By doing so, you can control where and how much money is being spent. When expenses are kept within predefined limits, you can avoid overspending and reduce costs. Also, by setting up an approval process, you can ensure that only authorized expenses are made and that proper documentation is submitted. This can help you avoid costly mistakes.