Tracking expenses against a budget is a critical task for any project coordinator, but it can be difficult. To overcome the common challenges you face, you need to implement some best practices and utilize some tools. Define your budget scope, assumptions, and constraints clearly and realistically. Break down your budget into manageable and measurable components. Use historical data, benchmarks, and expert opinions to estimate your costs. Review and update your budget regularly and compare it to your actual expenses. Identify and track your budget variances and take corrective actions if needed. Communicate your budget status and issues to your stakeholders and team members. Spreadsheet software like Excel or Google Sheets can help you create, edit, and store budget data. Project management software like Asana or Trello can link your budget data to project tasks, milestones, and resources. Accounting software like QuickBooks or Xero can record, categorize, and report expenses. Budgeting software like Mint or YNAB can create, monitor, and adjust budgets. Dashboard software like Power BI or Tableau can visualize and analyze budget data. By following these best practices and utilizing these tools, you will be able to plan and track your budget more effectively and efficiently in order to achieve your project objectives and outcomes.