The Problem With Measuring What You Billed Instead of What You Kept

Gross revenue is total billings — everything invoiced to clients across all projects in a given period. It includes design fees, consultant pass-throughs, reimbursable expenses, and any other amounts billed.

Net revenue is what remains after subtracting the costs that were never the firm's money to keep — consultant fees paid to subconsultants and direct project expenses incurred on behalf of clients.

Net Revenue = Gross Revenue minus Consultant Fees Paid minus Direct Project Expenses

For a firm that does no subconsultant work and bills no reimbursables, the two numbers are identical. For a firm with significant consultant spend, they can diverge by hundreds of thousands of dollars—and in some project types, consultant fees can represent 30, 40, or even 50 percent of the total billed amount.

The firm that measures its performance against gross revenue includes money it collected and immediately passed on to consultants. That money moved through the firm's bank account. It was never available to pay staff, cover rent, invest in marketing, or generate profit. Measuring profitability against it produces a number that consistently overstates revenue and understates margin — in ways that make genuinely profitable work look mediocre and make project-to-project comparisons unreliable.

Why this matters more in A/E than in most industries

Professional service firms in law, consulting, and accounting typically have minimal pass-through costs. Their gross and net revenue are nearly identical, so the distinction rarely matters.

A/E firms are different. Most projects of any meaningful size involve subconsultants. The consultant fees on a complex building project — structural, MEP, civil, landscape, and specialty consultants — can easily account for 25 to 40 percent of the total billed amount. On infrastructure projects with heavy subconsultant involvement, the percentage can be higher.

That pass-through volume makes the gross vs net distinction genuinely important for A/E firms — not a theoretical accounting concern but a practical one that affects how every financial metric is calculated and every performance comparison is made.

What Gross Revenue Distorts — Beyond Project Comparisons

The elementary school example illustrates the most visible distortion. But using gross revenue as the primary metric creates problems across every dimension of firm financial management.

Profit margin percentages are compressed and misleading

When net income is divided by gross revenue rather than net revenue, every margin percentage is smaller than it should be — because the denominator is inflated by consultant pass-throughs that contributed nothing to profit. A project generating $40,000 in net income on $200,000 in net revenue has a 20% margin. Against $500,000 in gross revenue, it looks like an 8% margin project. The work hasn't changed. The measurement has made it look worse.

This matters when principals evaluate project performance, set profitability targets, or compare results against industry benchmarks. The A/E industry's standard profitability benchmarks — operating profit as a percentage of net revenue and net multiplier — are all net revenue-based. A firm comparing its gross revenue margins to net revenue benchmarks is comparing incompatible figures and will consistently conclude it is underperforming when it may not be.

Year-over-year performance comparisons become unreliable

A firm that grows gross revenue by 15% in a year appears to be performing well. If that growth came from projects with higher consultant intensity than the prior year, net revenue may have grown by 8% or stayed flat — a very different performance story. Firms that track gross revenue as their primary metric can misread the business's direction for extended periods without understanding why margins feel thin despite strong billing activity.

Overhead and staffing decisions are based on the wrong base

Decisions about hiring, compensation, and overhead spending are often benchmarked against revenue. If that revenue figure is gross rather than net, the benchmarks are off. A firm with $1,038,988 in gross revenue but only $1,004,138 in net revenue is not materially affected in this example because consultant spend is modest. But a firm billing $2M in gross revenue with $600,000 in consultant pass-throughs has $1.4M in net revenue — and a meaningfully different overhead carrying capacity than the gross figure implies. Staffing and overhead decisions made against the $2M figure are based on money the firm never had available to spend.

How to calculate net revenue correctly

The calculation is straightforward once the chart of accounts is correctly structured.

Net Revenue = Total Income minus Total COGS

Using real P&L figures: Total Income of $1,038,988 minus Total COGS of $34,850 equals Net Revenue of $1,004,138.

That $1,004,138 is what the firm actually retained. It is the correct base for operating profit margin, net multiplier, overhead recovery analysis, and every other performance metric the firm uses to evaluate itself.

The reimbursable income piece

One nuance worth understanding: reimbursable billings to clients — permit fees, travel, printing billed at cost plus markup — are not a COGS offset. They are income, and they belong in a dedicated Reimbursable Income account in the Income section of the P&L.

A firm that incurred $100 in permit fees and billed the client $115 has $100 in Direct Expenses under COGS and $115 in Reimbursable Income. The net contribution to net revenue is $15—the markup, the only portion of the reimbursable transaction that represents earned income. Netting reimbursable billings against COGS, rather than booking them as income, understates net revenue. Booking them into Design Services inflates the professional fees figure. A dedicated account keeps both clean.

→ Read: The 3.0 Rule: Why Your Projects Aren't as Profitable as You Think

→ Read: Stop Measuring Profit the Wrong Way

How to Transition From Gross to Net Revenue Reporting

Most firms that currently measure against gross revenue do not need to restate historical financials to switch to net revenue as the primary metric. The transition is straightforward.

Step 1: Confirm the chart of accounts is correctly structured

Net revenue is only meaningful if COGS contains the right items — consultant fees actually paid, and direct project expenses actually incurred — and Reimbursable Income is a separate income account rather than buried in Design Services or netted against COGS. If the chart of accounts has been set up incorrectly, correct the structure first. Net revenue calculated from a wrongly structured P&L is not net revenue.

Step 2: Run the net revenue calculation from the corrected P&L

Total Income minus Total COGS equals Net Revenue. Run this figure for the current period and the trailing 12 months. These are the baseline figures against which future performance will be measured.

Step 3: Replace gross revenue with net revenue in all performance metrics

Operating profit margin, net multiplier, overhead recovery percentage, and revenue-per-staff benchmarks should all be recalculated using net revenue as the base. The margins will look different from what the firm has been reporting. In most cases, they will look stronger — not because the firm is performing better, but because the denominator is now accurately reflecting what the firm earned rather than what it collected and passed through.

Step 4: Apply net revenue consistently to project comparisons

This is where the transition pays off most immediately. Run every project comparison — by project type, by client, by project manager, by delivery method — against net revenue. The distortion that made consultant-heavy projects look like underperformers disappears. Projects with different consultant intensities can be directly comparable for the first time.

A firm that has been avoiding certain project types or client relationships because the margins looked thin can now evaluate whether those margins were actually thin, or whether they were measuring consultant pass-throughs as if they were the firm's own revenue. In many cases, the work was fine. The measurement was wrong.

Strategic decisions about which work to pursue, which clients to develop, which delivery methods produce the best returns, and which project types to price more aggressively can finally be made from data that reflects what the firm actually earned — not what it collected and passed through.

Communicating the change internally

For firms where principals and project managers have been tracking performance against gross revenue for years, the transition requires some internal explanation. A project that has always looked like a $500,000 project now looks like a $200,000 project if it carried $300,000 in consultants. The work hasn't changed. The measurement has become more accurate.

Framing the transition as a move toward honest comparison — the kind that lets the firm finally understand which work is actually worth doing — helps principals and project managers understand why the numbers look different without concluding that the firm's performance has declined.

→ Read: Financial Metrics for A/E Firms

→ Read: Billing & Profitability for A/E Firms

→ Read: Subconsultant Management for A/E Firms