Net Operating Revenue (NOR): Calculation, Components, and Benchmarks

How to calculate Net Operating Revenue by subtracting consultant costs and reimbursable expenses from gross revenue, what each component means, and how to benchmark NOR against industry data for architecture firms.

ARE · Practice Management

Overview

Gross revenue looks impressive on paper. But it lies to you. A firm that bills $2 million but passes $800,000 straight to structural engineers and MEP consultants didn't actually earn $2 million. It earned $1.2 million. That $1.2 million is Net Operating Revenue, or NOR.

NOR strips away the money that just passes through your firm. Consultant fees, reimbursable expenses, project-related costs that get billed to clients but aren't really yours. What's left is the revenue your firm actually controls and must use to cover salaries, overhead, and profit.

This matters for the ARE because NOR is the foundation of every meaningful financial ratio in practice management. Profit margins, overhead rates, the net multiplier. They all start from NOR, not gross revenue. When a firm reports 13.2% profitability, that's 13.2% of NOR. When you see that architecture firms average $143,000 in net billings per employee, that's a NOR-based metric.

The formula is straightforward: take total fees billed, add reimbursable expenses billed, then subtract outside consultant costs and project-related expenses. The result is NOR, and it represents 100% on the accrual-basis profit and loss statement. Every other line item gets measured against it.

Understanding NOR separates candidates who can read a financial statement from those who can actually evaluate a firm's financial health. The exam expects you to do the latter.

Essential

Why Gross Revenue Misleads Picture two architecture firms. Firm A bills $5 million. Firm B bills $3 million. Which one is performing better? You can't answer that without knowing more. Firm A subcontracts $2.5 million to outside consultants and passes through $500,000 in reimbursable expenses. Firm B handles nearly everything in-house, with only $200,000 in consultant fees and $100,000 in reimbursables. Firm A's NOR: $5,000,000 - $2,500,000 - $500,000 = $2,000,000 Firm B's NOR: $3,000,000 - $200,000 - $100,000 = $2,700,000 Firm B generates $700,000 more in controllable revenue despite billing $2 million less. Gross revenue told you one story. NOR told you the real one. ## The NOR Formula NOR = (Total Fees Billed + Reimbursable Expenses Billed) - (Outside Consultant Costs + Project-Related Expenses) Breaking that down piece by piece: Total Fees Billed includes all professional service fees your firm charges clients.

Professional

Scenario 1: Evaluating Two Fee Proposals Consider a mid-size firm evaluating its financial performance across two project types. The residential studio produces $1.8 million in gross billings with $150,000 in subconsultant fees and $50,000 in reimbursable costs. The commercial studio generates $3.2 million in gross billings but carries $1.1 million in subconsultant fees and $200,000 in reimbursables. Residential NOR: $1,800,000 - $150,000 - $50,000 = $1,600,000 Commercial NOR: $3,200,000 - $1,100,000 - $200,000 = $1,900,000 The commercial studio bills nearly twice as much but generates only $300,000 more in NOR. If both studios employ similar headcount, the residential studio may actually deliver better revenue per employee. A principal reviewing these numbers would question whether the commercial studio's heavy reliance on subconsultants is strategically sound. ## Scenario 2: Net Multiplier and the Break-Even Question An architect managing a 25-person firm is reviewing annual financials. NOR is $3,750,000.

TLDR

NOR formula: Total fees billed + reimbursable expenses billed - outside consultant costs - project-related expenses. This is your firm's actual controllable revenue.
Why not gross revenue? Gross revenue includes money that just passes through to subconsultants. NOR strips that out so you see what your firm really earned.
NOR = 100% on the P/L. Every other line item (direct labor, overhead, profit) is expressed as a percentage of NOR.
Net multiplier = NOR / Direct Labor. Tells you how many dollars of revenue each dollar of direct labor generates.
Break-even multiplier = 1 + overhead rate. If your overhead rate is 160%, break-even is 2.60. Anything below that and you're losing money.
Industry profitability: ~13% of net billings (AIA 2023 data). Professional services broadly target 15-30%.
Net billings per employee: $143,000 industry average (AIA 2023). Quick benchmark for comparing firms of different sizes.
Exam trap: Always use NOR, not gross revenue, as the base for financial ratios. This trips up candidates constantly.

ELI5

Think of running an architecture firm like running a lemonade stand. But this isn't a simple lemonade stand. You also sell cookies that your friend Sarah bakes. When you close up shop, you count $100 total from customers. But $30 of that was for Sarah's cookies, and you have to pay Sarah that $30. Another $10 went to buying fancy cups that a particular customer requested (and paid you back for). So how much did your lemonade stand actually earn? Not $100. You earned $100 - $30 - $10 = $60. That $60 is your Net Operating Revenue. It's the money that's truly yours to work with. In an architecture firm, "Sarah's cookies" are the subconsultants. When a client hires your firm to design a building, you often need structural engineers, mechanical engineers, and other specialists. The client pays you, and you pay them.

AREPractice Management

Net Operating Revenue (NOR): Calculation, Components, and Benchmarks

2 min read220 words

Net Operating Revenue: The Number That Actually Tells You How Your Firm Is Doing

Understanding NOR separates candidates who can read a financial statement from those who can actually evaluate a firm's financial health. The exam expects you to do the latter.

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