Cash vs Accrual Accounting for Architecture Firms

The accounting method an architecture firm runs on gets decided once, usually in the first year, usually by whoever set up the QuickBooks file, and then it sits there unexamined while the practice grows around it. For a lot of firms that original call was cash basis, because cash basis is simple and a one-person studio doesn't need anything more. The problem shows up later. Somewhere between $750K and $3M in fee revenue, with three or four projects running across different phases and a payroll that goes out every two weeks regardless of where any deposit landed, cash-basis books stop being able to answer the questions the principal is now asking. Which project is actually carrying the firm. Whether the new hire is affordable. Why last month looked like a windfall and this month looks like a loss when the studio did roughly the same volume of work in both.

So let's settle it for an architecture practice. If you want one answer that holds for nearly every firm we work with: accrual accounting is how you should manage the firm. Cash basis has specific, narrow uses (your 13-week cash flow forecast, certain tax situations) that matter and shouldn't be dismissed, but those are supplementary instruments. Your management books, the financials you use to price the next proposal, decide on a hire, and understand which project type makes money, should be on accrual. This post explains why that matters more for architecture than for almost any other kind of business, where cash basis still earns its place, and how to run both without it becoming a chore.

The difference in one paragraph (in architecture terms)

Cash basis accounting records revenue when a client's payment hits the bank and expenses when money leaves it. Accrual accounting records revenue as the work is performed and expenses as they're incurred, regardless of when cash actually moves. For a firm that bills in phases under a standard AIA B101 agreement (schematic design, design development, construction documents, construction administration), that single distinction changes everything about what your monthly financials are telling you.

Picture a $240K design fee on a project, structured as a 15 percent retainer at signing and then billed across the phases. The retainer (a $36K check) lands in March before a single drawing is produced. On cash basis, March looks like a phenomenal month and the design team's salaries that month look like pure cost against almost no revenue in the prior period. Then the schematic design work happens across March and April, the studio earns that retainer down, and the cash-basis books show those two months as heavy on payroll and light on revenue. Nothing about the firm changed. The deposit just arrived before the work did. Accrual recognizes the fee as the SD phase is delivered, so the revenue sits in the same months as the salaries that produced it. One of those views tells you whether the project is profitable. The other tells you when a check cleared.

Think about how you'd manage your own household finances. If you walked into an ATM every morning, checked the balance, and made every major decision off that one number (whether to buy a house, take a vacation, change jobs), you'd make a lot of bad calls. The balance doesn't know about the paycheck landing next Friday, the credit card bill due in two weeks, the tax refund coming in April. It tells you one thing accurately: how much cash is in the bank right now. To actually manage your financial life you need a fuller view, one that understands income earned (not just received) and obligations committed (not just paid). An architecture firm works the same way, except the timing gaps are bigger, because a construction administration phase can run for a year and the money arrives in lumps that have nothing to do with when the work got done. Cash basis is the ATM-balance view. Accrual is the full financial-life view. You need both, for different moments, but you can't run the firm on the first one alone.

This is why "cash or accrual for an architecture firm?" has no single answer. Manage the practice? Accrual. Forecast cash next month? A cash-basis view. File taxes? Depends on your entity and revenue. Most principals treat it as binary because they were set up on one method and never told there was a choice.

Why accrual is how you manage an architecture firm

Phase billing and long collection cycles are exactly the conditions that make cash-basis management books misleading. Every consequential question a principal asks depends on accrual answers. The three biggest:

Is this project actually profitable, and at which phase? Project-level and phase-level gross profit margin, or GPM (fee revenue minus the direct labor and consultant cost to deliver it, as a percentage), is the single most important number in an architecture firm. You can't read it on cash basis, because the phase deposit and the labor that delivers the phase almost never land in the same month. On accrual, the SD work performed in March shows up with the March staff cost that produced it, and you can finally see that schematic design runs at a healthy margin while construction administration, with its drawn-out site visits and RFI responses, quietly bleeds. On cash, the same project shows a fat profit the month a deposit cleared and a loss across the months the team actually did the work. Neither number tells you anything real about the project.

Is the trend getting better or worse? If you're watching monthly financials to see whether margins are improving, whether overhead (rent, software, professional liability insurance, non-billable staff) is creeping up, or whether your residential work is gaining or losing ground against your commercial work, cash basis actively hides the trend. A firm that collects two large CD-phase deposits in the same month will look spectacular that month and weak for the next quarter while it delivers the work. Nothing changed operationally. The cash was just lumpy, which in architecture it almost always is. Accrual spreads the fee across the months the phase work was performed, so the trend line reflects the practice instead of the billing calendar.

When is the right time to hire, price, or take on the next project? Every major decision in a studio is a commitment of future capacity against current economics, and staffing decisions in architecture carry three-to-six-month tails that can't be easily reversed. You need real current economics to make them well. The hiring equation we describe in our post on building a hiring equation for services businesses uses five variables, and four of them depend on accrual numbers (revenue per FTE, GPM, net profit for non-billable hires, trend stability). Run those off cash basis and you get four variables that move more because a deposit cleared than because the firm's economics changed.

There's a fourth reason that matters at specific moments. Accrual is what serious external parties expect. A bank underwriting the line of credit you lean on to bridge an 81-day collection cycle. An equity partner buying into the practice. A buyer doing diligence if you sell or merge. Professional liability underwriters sizing your coverage. They all read accrual, because it shows what the firm actually is rather than what its bank balance was doing in one window. Running on cash basis internally means converting every time one of these conversations happens, which is painful and a tell that the books aren't ready.

Work-in-progress: the number cash basis can't show you

There's one architecture-specific reason accrual matters that deserves its own section, because it's where the most money hides: work-in-progress.

On any given Tuesday your studio is sitting on a pile of design work that's been performed but not yet billed. The DD phase is 60 percent complete but the milestone invoice doesn't go out until it hits 100 percent. That 60 percent of earned-but-unbilled fee is real value the firm has created, and on cash basis it's completely invisible until the invoice clears, sometimes months later. This is percentage-of-completion thinking, and it's the heart of why accrual fits architecture so well. The work is the thing of value, not the invoice and not the deposit. Accrual lets you recognize fee in proportion to the phase work actually delivered, which means your P&L shows the firm earning steadily through a long CD or CA phase rather than spiking on milestone dates and flatlining between them.

A firm that can't see its WIP routinely misjudges its own health. It feels poor mid-phase because no money has come in, then feels rich on the milestone, and makes hiring and spending decisions on that emotional sine wave instead of on the steady underlying reality. Accrual books with proper percentage-of-completion revenue recognition flatten that out and show the principal the truth: the firm earned roughly the same amount of fee in each of those months, because it did roughly the same amount of work.

Where cash basis still matters (more than most principals realize)

None of this means cash basis is useless. It earns its place in two specific spots, and firms that ignore them end up with a different problem.

The cash flow forecast. A 13-week rolling cash flow forecast, the single most useful short-term instrument an architecture firm has, runs on cash-basis logic. It tracks when money will actually move, which for a phase-billed firm waiting an industry-average 81 days to get paid is a genuinely different question from whether the work is profitable. Accrual tells you the CA phase is being delivered at a healthy margin. The cash forecast tells you whether the deposit will land before Thursday's payroll. We wrote a full guide to building a 13-week cash flow forecast for architecture firms as the companion to this piece, because this is exactly where the two instruments work together. Accrual underneath says the practice is economically healthy. Cash on top says whether that health reaches the bank in time. You need both.

Tax. Tax treatment varies by entity structure, revenue level, and jurisdiction, and we're explicitly not giving tax advice here (that's a conversation for your CPA or tax advisor). What we can say is that for some firms, cash-basis tax filing produces a materially different (often lower) short-term tax bill than accrual, because fee recognized on accrual books but not yet collected may not be taxed in the same period under cash-basis rules. For an architecture firm carrying large WIP balances across long phases, that gap can be significant. The catch is that many firms above certain revenue thresholds are required to file on accrual regardless, and the interaction of federal and state rules, entity type, and your specific situation gets complicated fast. The sensible approach: run management books on accrual always, and work with a tax advisor on whether a cash-basis tax election fits your situation.

For a plain-English overview of the method distinction from a neutral source, Paychex has a useful explainer. For the 13-week forecast method, AICPA & CIMA is the authoritative source.

A worked example: the same month, two methods

A 14-person architecture firm running at roughly $2.6M in annual fee revenue. Biweekly payroll of about $88K including taxes and benefits. In March, the studio is mid-stride on three projects: a commercial project deep in construction administration, a mixed-use project in design development, and a residential project that just signed.

In March the firm performs the work it always does. The CA team logs site visits and processes RFIs. The DD team pushes that phase from 40 to 70 percent complete. The new residential client wires a $45K retainer at signing, before any drawings start. No milestone invoice happens to clear in March, because the CA bill cleared in late February and the DD milestone won't hit until April.

On cash basis, March shows $45K of revenue (the retainer) against roughly $176K of payroll plus overhead. A brutal-looking loss. The principal sees it and tightens up, maybe delays a hire the pipeline actually supports.

On accrual, March recognizes the fee the firm genuinely earned: the CA work delivered, the DD progress from 40 to 70 percent as percentage-of-completion, and zero of the residential retainer (no work performed yet). That comes to roughly $215K of recognized fee against the same costs. A solid, profitable month, which is what actually happened. Same studio, same effort, same Tuesday. The two methods describe two different businesses, and only one of them is the real one.

Running both in parallel: what it actually looks like

The setup that works for the firms we see running this well is straightforward: accrual management books as the foundation, a weekly cash flow forecast on top, and a tax conversation handled separately with an advisor.

The books are structured properly in the first place. This is the part most firms skip, and the part that makes everything else work. Direct delivery costs (billable staff time, directly engaged consultants, project-specific software, reimbursables and pass-throughs) need to sit in the right buckets, separated from overhead. Fee revenue needs to be recognized by project and by phase, on a percentage-of-completion basis, not dumped in whenever an invoice clears. Done once and maintained, this takes care of itself. Done wrong, every report tells a slightly different story depending on which month you open.

The monthly close produces an accrual P&L and balance sheet (a snapshot of what the firm owns versus owes at a point in time, including that WIP balance). This is the management view: GPM by project and phase, overhead as a share of fee, revenue per FTE, net profit margin, all on accrual numbers. If you work with a financial partner, this is the monthly conversation, about what the trend says and what it implies for the next proposal and the next hire.

A weekly cash flow forecast operates in parallel. Built on bank reality, not accrual reality. It answers: given which deposits and milestone collections land when, and which payrolls and consultant bills go out when, are we tight or comfortable nine weeks from now? This is what drives hiring timing, which specific invoices to chase, and partner-draw decisions.

Tax sits in its own conversation. Your tax advisor reviews the accrual books, determines the right filing basis for your entity and revenue, and handles the filings. The management books don't change based on what the tax filing chooses.

Running the two views together takes less effort than principals expect, once the bookkeeping foundation is structured correctly. The accrual-to-cash conversion at the top of the forecast is mostly automatic when project accounting and AR/AP are clean. It becomes a chore only when the underlying books are messy, which is usually the real problem hiding behind a "which method should I use?" question.

The three signs you're on the wrong method for management books

Three patterns almost always mean a firm is running cash-basis books as if they were management books:

Your monthly financials swing wildly while the studio's workload doesn't. If March looks like a windfall and April looks like a loss, and the team did roughly the same volume of design work in both, the books are reflecting deposit and milestone timing rather than reality. Accrual with percentage-of-completion would smooth it.

You can't pull GPM by project or phase. If you genuinely don't know whether construction administration is making or losing money relative to design development, or whether your residential work subsidizes your commercial work, that's usually a cash-basis problem stacked on a categorization problem. Accrual with proper direct-cost categorization makes it knowable in minutes.

A bank, partner, or buyer said your numbers "look small" or inconsistent. Cash-basis books aggregated over a year make a healthy firm look erratic, especially one with lumpy phase billing. External readers are trained on accrual and discount what they don't recognize. This is often the moment a principal realizes they need to reconstruct accrual financials retroactively, which is far more painful than just having kept them.

If any of those are familiar, the move is the same: restructure onto accrual management books with percentage-of-completion revenue recognition, add a weekly cash view on top, and keep the tax conversation separate. Firms that make this switch describe it as one of the higher-leverage structural changes they've made, because it makes every other decision more reliable.

FAQ: Cash vs accrual accounting for architecture firms

If your current books can't answer the questions you're asking

The right accounting method for an architecture firm is rarely the complicated question principals treat it as. Accrual for the management books, with percentage-of-completion so phase work and fee line up. Cash basis for the 13-week forecast. Tax sits separately with an advisor. The harder question, and the one worth asking instead, is whether the bookkeeping foundation underneath is structured so that both views are possible and trustworthy.

If you're running cash-basis books today, or accrual books loose enough that you can't trust the project numbers, the fix is straightforward but methodical. The way we work at Visory starts here: the bookkeeping foundation is what makes everything else possible, and getting it right (project-level revenue, WIP, consultant costs separated from overhead, reimbursables tracked against their offsetting income) is the unglamorous work that unlocks every other decision a principal makes. Visory Insights is the layer on top that turns clean numbers into direction. If you'd like to see what your own books look like through this lens, book a Financial Performance Check and we'll walk through what moving to properly-structured accrual management books would look like for your firm.

For the layers this conversation sits alongside, see our pillar piece on cash vs accrual accounting for services businesses and our guide to why profitable services businesses still run out of cash.