Since interchange fees are set by the card networks and charged per transaction, they’re not only unavoidable but also non-negotiable. However, you can still reduce overall processing costs by encouraging customers to pay in person, where fees are often lower. For example, you might consider promoting in-store specials, or discounts that incentivise customers to shop and pay in person rather than online or over the phone. Learning how to run an effective email marketing campaign or how to use social media for small business could help you spread the word about your special events.