Cost forecasting in logistics starts with tactical transport planning. These five connections explain how: 1) Tactical plans set transport volume estimates, 2) Define mode split (truck, rail, etc.), 3) Highlight peak-rate risk, 4) Map fuel usage by route, 5) Align labor needs with load schedules. By forecasting at the tactical level, companies gain visibility into variable logistics costs. This planning layer informs budgeting and prevents overspending. It connects finance and operations through data-backed transport plans. These five connections help create accurate cost models that hold up under real-world logistics pressure. In unpredictable supply chains, tactical planning delivers predictable cost control.