Architecture projects unfold over months or years, with fees earned at defined milestones rather than on delivery of a discrete product. This time-spread structure creates a bookkeeping challenge that sits at the intersection of revenue recognition, work-in-progress (WIP) valuation, and cash flow management. Get it wrong and the firm's profit-and-loss statement will misrepresent the true earnings position — often significantly.
Work-in-Progress (WIP) Valuation
WIP is the value of services rendered on a project for which a fee has not yet been invoiced. In an architecture firm, WIP accumulates between milestones. If the bookkeeping practice is cash-based or invoice-based (only recognising revenue when invoiced), WIP is understated and income is deferred — which may be appropriate for tax purposes but distorts management reporting.
For accrual-accounting firms, WIP should be calculated and posted at each reporting period:
Journal entry to record WIP:
DR WIP Asset (Balance Sheet) $X
CR Revenue — Unbilled Services $X
When the milestone invoice is issued:
DR Accounts Receivable $X
CR WIP Asset $X
The WIP rate is typically calculated as: hours worked × charge-out rate, or as a percentage of the total project fee corresponding to the percentage of the service stage completed. Firms that use timesheets (Harvest, Deltek, ArchiOffice) can extract WIP automatically. Firms relying on principal estimates must document the basis for each estimate to support the figure through an audit.
At year end, the ATO's position on WIP for professional service firms is set out in Tax Ruling TR 97/7 (now effectively superseded for most firms by AASB 15) — discuss the appropriate recognition basis with the principal.
Stage Invoicing for the RAIA Fee Basis
The Australian Institute of Architects' (AIA) recommended fee basis structures architectural services into six stages:
- Schematic design
- Design development
- Construction documentation
- Tender
- Contract administration
- Post-practical completion
Each stage is invoiced as a percentage of the agreed total fee. Common practice is to invoice in arrears at stage completion, though some firms invoice progress payments within each stage for longer projects.
Key bookkeeping requirements for stage billing:
- Maintain a project ledger for each project with the total agreed fee, stage percentages, amounts invoiced to date, and WIP accrued.
- Track retentions if the client is withholding a percentage of each invoice pending practical completion.
- Post variations (additional scope approved by the client) to the project ledger before they are invoiced to ensure the revenue recognition is correct.
Reimbursable Expenses: Gross vs. Net
Architects routinely incur expenses on behalf of clients — model-making, specialist consultant fees, travel, printing — and recover these as disbursements. The gross vs. net presentation question matters for GST:
- Gross presentation: The firm invoices the client for the full expense amount (e.g., $1,100 including GST), credits a reimbursement income account ($1,100), and debits an expense account for the cost ($1,000) plus GST ($100 claimed as ITC). Net P&L impact: $0.
- Net presentation: The firm passes through only the net cost (an agency arrangement). The firm does not include the GST in its sales.
The ATO's position is that if the firm is acting as principal (it contracts with the consultant directly and bears the risk), it must use gross presentation. If it is acting as agent (the consultant invoices the client directly and the firm merely facilitates), net presentation applies. Most architecture firms act as principal for their consultants — gross presentation is required.
Professional Indemnity Insurance
Professional indemnity (PI) insurance is a non-negotiable operating cost for an architecture firm — the Architects Act (jurisdiction-specific) and the AIA's code of conduct both require it for registered practitioners.
PI premiums are fully deductible as a business expense. A critical bookkeeping note: PI insurance runs on a claims-made basis, meaning the premium for the current period covers claims made during that period regardless of when the work was done. If the firm is sold or the principal retires, run-off cover (tail cover) must be purchased — this is also deductible.
Partnership vs. Corporate Structure
Many architecture firms operate as partnerships of principals, with income distributed according to a partnership agreement. Bookkeeping for a partnership:
- The partnership itself is not a taxable entity — income flows through to partners in their agreed proportions and is assessed in each partner's individual return.
- Partner drawings are equity transactions, not salary expenses. Do not post partner drawings to the wages expense account.
- Prepare a partnership distribution statement at year end showing each partner's share of income and any deductible expenses allocated to each partner.
Where a corporate structure is used (one or more companies as partners, or a corporate practice), Div 7A risk arises if the company pays expenses or makes loans to director-shareholders without complying with Div 7A of the ITAA 1936.
CAD Software and Technology Licences
Architecture firms make significant investments in CAD and BIM software (Revit, ArchiCAD, AutoCAD) and cloud-based collaboration platforms. Subscription licences are deductible in full in the period to which they relate. Perpetual licences are depreciating assets under Div 40 of the ITAA 1997, with an effective life typically assessed at 3–5 years for software.
Hardware (workstations, large-format printers) is depreciated over effective life — ATO TR 2023/1 sets the effective life for desktop PCs at 4 years and printers at 5 years. Small business entities can apply simplified pooling under Subdiv 328-D.
Overseas Project Revenue and Withholding Tax
Australian architects working on overseas projects must consider:
- Is the income assessable in Australia? Yes, for Australian residents on worldwide income under s.6-5(2) of the ITAA 1997.
- Does the foreign jurisdiction impose withholding tax on the fee? If so, a foreign income tax offset may be available under Div 770 of the ITAA 1997 to avoid double taxation.
- GST does not apply to supplies made to non-residents for use outside Australia (they are GST-free exports under s.38-190 of the GST Act) — but confirm the specific circumstances with the ATO's export of services rules.
Legislation and Further Reading
- Income Tax Assessment Act 1997, s.6-5 (assessable income), Div 40, Subdiv 328-D, Div 770
- Income Tax Assessment Act 1936, Division 7A
- ATO TR 97/7 — work in progress (professional service firms)
- A New Tax System (Goods and Services Tax) Act 1999, s.38-190 (export of services)
- AIA fee basis guidance — schedule of services and recommended fee percentages
- Architects Act (jurisdiction-specific) — PI insurance and registration requirements