The profitability of a Third-Party Logistics (3PL) business can vary based on factors such as scale, efficiency, and market conditions. Net profit percentages in the logistics industry often range from 5-20%, but it's crucial to consider various costs like warehousing, transportation, and technology investments. Experience working for a logistics company can provide valuable insights into industry dynamics. If you've been successful in fulfillment for e-commerce brands in Australia at a smaller scale, expanding and optimizing operations could enhance profitability. Consider market trends, technology integration, and cost management to further improve your 3PL business.