TL;DL (The Bottom Line)Know Your Numbers: Effective job costing isn't optional; it's the foundation for understanding true project profitability in residential construction.   Plug the Leaks: Hidden profit leaks from inaccurate estimates, scope creep, and mismanaged costs silently drain your bottom line.   Track Everything: Implement best practices like detailed cost codes, accurate labor burden tracking, and regular budget reviews to gain control.   Be Proactive: Mitigate leaks with rigorous estimating, iron-clad change order processes, and strong project management systems.   Leverage Tech: Use integrated software for estimating, project management, and accounting to streamline job costing and boost efficiency.