What is commitment accounting?

Commitment accounting is a method that records financial obligations when commitments are made (such as purchase orders or contracts signed) rather than waiting for invoice receipt or payment. For professional service firms, commitment accounting provides earlier visibility into spending against budgets by capturing commitments before actual expenses occur. This enables proactive budget management rather than reactive discovery of overruns.

Key characteristics

• Records obligations when commitments are made

• Provides earlier spending visibility than traditional accounting

• Captures purchase orders and contracts as commitments

• Enables proactive budget management

• Particularly useful for project-based businesses

• Complements traditional expense accounting

Why it matters for professional service firms

Traditional accounting records expenses when invoices arrive, or payments are made, which may be weeks or months after commitments are made. By then, budget overruns are difficult to address. Commitment accounting captures spending intentions immediately, enabling managers to see budget impact before money is actually spent. Professional service firms can use commitment accounting for project budgets, ensuring spending decisions are visible before they become expenses.

Real-world example

Patricia's firm managed project budgets but often discovered overruns after the fact. A project manager could commit to $20K in subcontractor work, but the expense would not appear until the invoice arrived weeks later, well past when the budget was exceeded. Implementing commitment accounting: all contracts and POs recorded as commitments immediately, project budget reports showed both actual expenses and committed amounts. Result: budget visibility moved forward by 4 to 6 weeks on average, project managers could see when commitments would exceed budget before additional spending occurred, and budget overruns dropped significantly.