Project Accounting for Architecture Firms: Revenue Recognition, WIP, and Tax Methods

An architecture firm does not earn revenue the way a retailer does. A project that takes 14 months from schematic design to construction administration generates revenue along the way (milestone billings, monthly invoices, lump-sum payments at phase completion), but the costs are incurred unevenly and the final outcome may not be known until the project is complete. The accounting method the firm uses for tax purposes determines when this revenue is recognized, how much tax is owed in each year, and whether the firm can defer revenue to manage its tax liability.

What accounting methods are available?

Cash method: Revenue is recognized when received. Expenses are deducted when paid. This is the simplest method and gives the firm the most control over timing (delay billings to defer revenue, prepay expenses to accelerate deductions). The cash method is available to firms with average annual gross receipts of $31 million or less.

Accrual method: Revenue is recognized when earned (the right to payment is established, typically when milestones are reached or services are performed). Expenses are deducted when the liability is incurred and economic performance occurs. The accrual method does not depend on when cash changes hands.

Percentage-of-completion method (IRC 460): Revenue is recognized each year based on the percentage of the project that is complete. The completion percentage is typically measured using the cost-to-cost method: costs incurred to date divided by total estimated costs. If a $1,000,000 project is 40% complete (based on costs incurred), the firm recognizes $400,000 of revenue.

Completed-contract method: All revenue and costs are deferred until the project is complete. No income is recognized during the project, and no costs are deducted. When the project is finished, the entire profit or loss is recognized.

When is the percentage-of-completion method required?

PCM is mandatory for “long-term contracts” as defined in IRC 460. A long-term contract is a contract for the manufacture, building, installation, or construction of property that is not completed within the taxable year in which it is entered into.

However, most architecture contracts are contracts for services, not for the manufacture or construction of property. An architect does not build the building; the architect designs it. Whether an architecture contract is a “long-term contract” under IRC 460 depends on the specific terms. If the contract is purely for design services, it is generally not subject to IRC 460. If the contract includes design-build elements (the architect is also responsible for construction), it may be.

For firms that do have contracts subject to IRC 460 (design-build, construction management with guaranteed maximum price), the small contractor exception applies if the firm’s average annual gross receipts are $31 million or less and the contract is estimated to be completed within two years. Firms meeting the exception can use the CCM or any other permissible method instead of PCM.

What is Work in Progress and how does it affect taxes?

Work in Progress (WIP) represents costs incurred on a project that have not yet been billed or recognized as revenue. For an accrual-basis firm, WIP creates an asset on the balance sheet (the firm has invested labor and materials in a project that will generate future revenue).

For tax purposes, WIP affects income recognition under the accrual method. If the firm has performed $200,000 of work on a project but has only billed $150,000, the $50,000 of unbilled work is WIP. Under accrual accounting, the firm may need to recognize the $200,000 as revenue (if the right to payment is established), even though it has only billed $150,000.

Under the cash method, WIP has no direct tax effect (revenue is recognized only when cash is received), but the costs invested in WIP are deducted as paid, which can create losses in early project phases and profits in later phases.

How do fixed-fee and T&M contracts differ for tax?

Fixed-fee contracts: The total fee is agreed upon at the start. Revenue recognition depends on the accounting method: under cash, when payments are received; under accrual, as milestones are reached; under PCM, based on the cost-to-cost percentage; under CCM, at project completion.

Time-and-materials (T&M) contracts: The fee is based on hours worked at agreed rates, plus reimbursable expenses. Revenue is earned as hours are worked. Under accrual, revenue is recognized as the hours are billed. Under cash, revenue is recognized when payments are received. T&M contracts are generally not long-term contracts under IRC 460 because there is no fixed end point, so PCM does not apply.

For tax planning purposes, T&M contracts are easier to manage because the revenue matches the work performed. Fixed-fee contracts create timing differences between when costs are incurred and when revenue is recognized, which makes the accounting method choice more consequential.

How do you change accounting methods?

A firm that wants to switch from one accounting method to another (for example, from accrual to cash after meeting the $31 million gross receipts test) must file Form 3115 (Application for Change in Accounting Method). The change requires IRS consent (automatic consent is available for most method changes under Revenue Procedure 2024-23).

The change creates a Section 481(a) adjustment, which is the cumulative difference between the old method and the new method applied to all prior years. A positive adjustment (income is higher under the new method) is spread over four years. A negative adjustment (income is lower under the new method) is taken entirely in the year of change.

For a firm switching from accrual to cash, the 481(a) adjustment typically produces a negative adjustment (because accrual recognizes revenue earlier than cash), which creates a one-time deduction in the year of change.

Related guides:

• Architecture Firm Entity Structure Llc Scorp
• Architecture Firm Multistate Nexus Licensing
• Architecture Firm Professional Liability Insurance Tax
• Architecture Firm Retirement Plans Partner
• Architecture Firm Succession Ownership Transition

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.