Understanding Expenses, Revenue & Profit

Introduction to Managerial Accounting

Managerial accounting gives an architecture or engineering firm owner a clear view of how the firm makes money, where it loses money, and whether growth is actually improving the business. A traditional profit-and-loss statement is useful, but it does not answer every operating question. You also need to connect financial results to project hours, consultant costs, staffing, billing delays, and the work your principals perform.

The goal is simple: price work correctly, control project costs, protect cash, and leave enough profit to strengthen the firm.

Concept: Expenses

Expenses are the costs required to operate the firm. They include salaries, payroll taxes, rent, software, insurance, professional licenses, equipment, recruiting, marketing, and outside consultants. Project-related costs may include surveyors, geotechnical engineers, renderers, testing agencies, permitting support, and specialty consultants.

Separate expenses into two useful groups. Direct project costs can be traced to a specific commission, such as consultant invoices or project travel. Overhead supports the whole firm, such as office rent, accounting, software, and administrative salaries.

Real-World Example: An engineering firm notices that several civil projects are running over budget because senior engineers are doing routine drafting and repeated plan revisions. The owner reviews labor by project and finds that the firm is absorbing 180 unbilled hours each month. By improving scope notes, using standard details, and assigning drafting work at the right level, the firm reduces wasted hours and improves project profit without cutting quality.

Concept: Revenue

Revenue is the money earned from professional services. For an architecture or engineering firm, revenue may come from feasibility studies, programming, schematic design, construction documents, permitting support, construction administration, surveys, inspections, or recurring facility work.

Do not treat signed contract value as collected revenue. A $240,000 design agreement may be billed over eighteen months, and some invoices may remain unpaid. Track revenue by project, phase, billing method, and collection status. Fixed-fee work should be compared with the hours and costs used to deliver it. Time-and-materials work should be checked for complete and timely timesheets.

Real-World Example: An architecture firm adds post-occupancy reviews and small facility planning services for existing clients. These smaller assignments create $18,000 in monthly billings and keep staff productive between large design phases. The firm uses the added revenue to fund a project accountant and improve billing follow-up.

Concept: Profit First

The Profit First method changes the usual formula from Revenue - Expenses = Profit to Revenue - Profit = Expenses. The point is not to hide money from the business. The point is to reserve profit, taxes, and owner compensation before every available dollar gets consumed by hiring, software, or unplanned project work.

Set practical percentages based on the firm's current financial position. A small firm might begin by reserving 5% of collected revenue for profit, 15% to 20% for taxes, and a separate amount for owner pay. Review these percentages with the firm's accountant. Move the reserves on a regular schedule so the operating account shows what the firm can truly afford to spend.

Real-World Example: A structural engineering practice transfers 5% of each client payment into a profit account and 18% into a tax account. When a large project closes, the owner cannot immediately spend the full payment on new equipment or another hire. The reserves create stability and make investment decisions more deliberate.

The Importance of Cash Flow Management

Cash flow management tracks when money enters and leaves the firm. Profit on paper does not pay payroll. Architecture and engineering firms often have a cash gap because staff work for weeks before invoices are issued, clients take 45 or 60 days to pay, retainage is held, or a project is paused after significant work has been completed.

Review a rolling 13-week cash forecast every week. List expected collections by client, payroll dates, consultant payments, taxes, insurance, rent, loan payments, and large equipment purchases. Tie each expected collection to a specific invoice and follow up before it becomes overdue. Keep a reserve for payroll and taxes rather than treating every bank balance as available cash.

Real-World Example: A multidisciplinary firm sees a strong backlog but struggles to make payroll because three public projects have delayed payments. The owner changes the billing calendar, submits phase invoices within two days of approval, adds required backup to each invoice, and contacts client representatives before due dates. Collections improve without taking on another line of credit.

Conclusion

Managerial accounting is a management tool, not just a year-end tax exercise. Review project profit, overhead, collections, utilization, and cash reserves together. Ask which services create healthy margins, which project types consume too much senior time, and which clients pay reliably. When the numbers are reviewed every month, the firm can choose better projects, price scope changes, hire with confidence, and protect the quality of its work while building a durable business.