Cash flow keeps an architecture firm alive. Profit on paper means nothing if you can't cover payroll next Friday.

This topic covers three connected financial concepts that show up repeatedly on the PcM exam: cash flow management, the difference between cash and accrual basis accounting, and work-in-progress (WIP) tracking. Together, they determine whether a firm can pay its bills, report its finances accurately, and understand how much unbilled value sits on its balance sheet.

Cash flow is the movement of money into and out of your firm over a given period. A cash flow projection maps expected inflows against expected outflows, letting you spot shortfalls before they become crises. Firms that bill monthly but pay expenses weekly can show healthy profits on an income statement while running dangerously low on actual cash.

The accounting method you choose determines when revenue and expenses hit your books. Under the cash method, you record income when payment arrives and expenses when checks go out. Under the accrual method, you record income when you earn it (by performing work) and expenses when you incur them, regardless of when money changes hands. Most architecture firms beyond a certain size use accrual basis accounting because it gives a more accurate picture of financial health at any point in time.

Work-in-progress represents billable time and expenses your firm has completed but not yet invoiced. WIP shows up as an asset on the balance sheet. Tracking it tells you how much revenue you've earned that hasn't been billed, how projects are progressing against their budgets, and whether your billing cycle is keeping pace with production.

For the ARE, expect questions that ask you to evaluate a firm's financial position by analyzing cash flow patterns, choosing between accounting methods, or interpreting WIP data to make management decisions. The exam won't ask you to define these terms. It will ask you to use them.