Architecture Bookkeeping Small Business

The Studio Chart of Accounts: A Template for Architecture & Design Firms

Published July 29, 2026 by Invisible LLC Team · 9 min read

You went to design school. You did not sign up to build a chart of accounts. But if you run a studio, the chart of accounts is quietly deciding whether your books can answer the one question that actually matters — which projects made us money? — or whether they're just a pile of numbers organized for a tax return you file once a year. Most studios have the second kind. The good news: fixing it is structural, not mysterious, and you only have to do it once.

Key takeaways: A chart of accounts (COA) is the skeleton of your books — the list of buckets every dollar gets sorted into. The default one QuickBooks hands you is built for a generic small business and a tax return, not for a practice that bills in phases, passes through reimbursables, and lives or dies on project margin. Four adjustments — separating direct project costs from overhead, handling reimbursables cleanly, structuring revenue by how you actually bill, and using projects/classes instead of piling everything into the COA — turn your P&L from a formality into a decision tool.

What a chart of accounts is, and why the default one fails studios

Your chart of accounts is simply the master list of categories your bookkeeping sorts money into: revenue accounts, expense accounts, assets, liabilities, equity. Every transaction lands in one of them, and your Profit & Loss statement is just those categories added up. So the structure of the COA is the structure of everything you can learn from your books.

The problem: the COA most studios inherit is the QuickBooks default, lightly modified. It has a big "Income" line, a long alphabetical list of expenses (Advertising, Bank Fees, Meals, Office Supplies, Rent…), and no concept of a project. It's designed to make filing a tax return easy. It is not designed to tell a principal whether the museum competition they spent four months on actually paid, or whether reimbursables are leaking margin, or whether the studio is over- or under-staffed for its pipeline.

You can't get project answers out of a structure that has no project dimension. So we rebuild the structure. Here are the four changes that matter.

Change 1: Split direct project costs from overhead

This is the single most important move, and the one the default COA gets most wrong. Your expenses fall into two fundamentally different groups, and mixing them is why your margin is a black box:

Direct (project) costs — costs incurred because of a specific project: consultants and engineers you sub out, renderings, models, plotting and printing for a submission, project-specific travel, reimbursable expenses you'll bill back. These belong to jobs.
Overhead — the cost of keeping the studio running whether or not any single project exists: rent, software subscriptions, admin salaries, general marketing, insurance, professional development.

In the chart of accounts, group these separately — a set of direct cost accounts (often shown as cost of services / cost of revenue, right under income) and a separate block of overhead / operating expense accounts below. The moment you do this, your P&L grows a gross margin line: revenue minus direct project costs, before overhead. That number is the health of your project work. Then overhead comes off gross margin to get your real bottom line. Without the split, everything blends into one expense pile and "did the work pay?" is unanswerable.

Change 2: Handle reimbursables so they stop eating your margin

Reimbursables — the expenses you incur on a client's behalf and bill back (prints, travel, permit fees, a consultant you pass through) — are one of the biggest quiet leaks in a studio, and the COA is where you plug it. "Reimbursables eat me alive" is a near-universal studio complaint, and it's usually a bookkeeping-structure problem, not a discipline problem.

Set up matched accounts: a reimbursable expense account (or accounts) where the cost lands when you pay it, and a reimbursable income account where the rebill lands when you invoice the client. Now you can see, at a glance, whether reimbursables are truly washing through — money out matched by money in — or whether costs are going out the door and never getting billed back. If you mark up reimbursables (common on subs), that markup shows up as a small, real margin instead of vanishing into a generic expense line. This one change routinely surfaces thousands of dollars a studio was eating without knowing it.

Change 3: Structure revenue the way you actually bill

Studios bill in more than one shape — fixed-fee by phase (schematic, DD, CD, CA), hourly time-and-materials, retainers, and reimbursables. If all of it dumps into a single "Design Income" line, you lose the ability to see where your revenue actually comes from and how predictable it is.

Break income into a handful of revenue accounts that mirror your billing model — for example: Fixed-Fee / Phase Revenue, Hourly (T&M) Revenue, Retainer Revenue, and Reimbursable Revenue. Keep it to the categories that change how you think about the business; you don't need thirty income lines. The payoff is a P&L that shows the mix — how much of the studio runs on committed fixed-fee work versus variable hourly, and whether reimbursable pass-throughs are quietly inflating your "revenue." For the mechanics of billing itself — G702/G703, phase invoicing, and pay-application formatting — our AIA billing basics guide covers the invoicing side that feeds these revenue accounts.

Change 4: Use projects and classes — don't bloat the COA

Here's the trap studios fall into when they realize they need project-level detail: they start creating accounts for every project or client inside the chart of accounts. Don't. A COA with two hundred project-specific lines is unusable, and you'll be editing it forever.

The right tool is your accounting software's project (or job) tracking and class tracking, which sit on top of the chart of accounts as separate dimensions. You keep a clean, compact COA — a couple dozen well-chosen accounts — and then tag each transaction to a project (which job) and optionally a class (studio, discipline, or office, if you have more than one). Now the same clean structure can answer both "what did we spend on rendering across the whole studio this year?" (from the COA) and "what was the margin on the Riverside project?" (from the project tag). This is the setup that finally answers "I billed it — did we actually make money on it?" without a black-box guess. The deeper mechanics of running project margin this way live in our guide to job costing in QuickBooks for studios; the chart of accounts is the foundation it stands on.

Putting it together: a studio COA at a glance

A studio-ready chart of accounts, in broad strokes, looks like this:

Income — Fixed-Fee/Phase Revenue, Hourly (T&M) Revenue, Retainer Revenue, Reimbursable Revenue
Direct (Project) Costs — Outside Consultants/Subs, Renderings & Models, Printing/Plotting, Project Travel, Reimbursable Expenses
Gross Margin (calculated: Income − Direct Costs)
Overhead / Operating Expenses — Salaries & Payroll (non-billable/admin), Rent, Software & Subscriptions, Insurance, Marketing/BD, Professional Development, General Office
Net Income (calculated: Gross Margin − Overhead)
Dimensions on top: Projects (per job) and Classes (per studio/discipline/office)

That's it. It's not a hundred accounts — it's a couple dozen, structured so the P&L reads like the way you actually run a practice. Set it up once and every month's numbers get more useful instead of more confusing.

The bottom line

Your chart of accounts is either working for you or quietly costing you answers. Split direct costs from overhead so you get a real gross margin. Match reimbursable expense and income so the leak stops. Structure revenue around how you bill. And put project detail in project/class tracking, not in a bloated account list. Do those four things and your books stop being a tax-return formality and start telling you which projects — and which kinds of work — actually build the studio.

You're a principal, not a bookkeeper. If you'd rather have a partner who knows what phase billing and reimbursables are, set the structure up correctly, and hand you a monthly P&L with project margin already in it, that's the work we do for studios.