The short answer: a property or building inspector's bookkeeping needs to handle contractor engagement across multiple agencies or referral platforms, treat report-writing time as billable work rather than an unpriced afterthought, track professional indemnity and liability insurance as its own cost line, and apply proper depreciation to vehicles and specialist inspection equipment. None of this is complicated individually, but a generalist bookkeeper unfamiliar with the sector often misses several of these at once, quietly costing an inspector real margin.
Key takeaways
- Many property inspectors work across multiple agencies or platforms as contractors, and how that arrangement is recorded matters more than the label used in the contract.
- Report writing is genuine billable work, and inspectors who don't separately track it are often underpricing every inspection they deliver.
- Professional indemnity and public liability insurance are real, ongoing costs that need their own line in the books, not folded into general expenses.
- Vehicle and specialist equipment costs, moisture meters, thermal cameras, need proper depreciation treatment to reflect their real impact on margin.
Contractor Arrangements Across Multiple Agencies
Many property inspectors work across several real estate agencies, referral platforms, or as part of a franchise network, typically as contractors rather than employees of any single business. The practical relationship, not the label in the agreement, determines whether that classification genuinely holds up, and revenue offices have been actively reviewing contractor arrangements across several sectors in recent years. Clean, consistent invoicing to each agency or platform, with clear records showing genuine independence (own equipment, own methods, ability to decline jobs), supports the contractor position far better than a verbal understanding ever could.
| Engagement type | Typical indicator | Bookkeeping treatment |
|---|---|---|
| Genuine independent contractor | Uses own equipment, sets own schedule, works across multiple agencies | Invoiced as a business, GST if registered, no PAYG withholding |
| Franchise or panel arrangement | Operates under a franchise brand but retains genuine business independence | Still generally a contractor relationship, franchise fees tracked as a business expense |
| Effectively directed employee-style arrangement | Fixed hours, uses the agency's systems and branding exclusively, closely directed | Should generally be treated as employment, with payroll obligations applied |
Report Writing: Billable Work, Not an Afterthought
A thorough building or pest inspection report often takes as long to write up properly as the physical inspection itself, particularly for a detailed pre-purchase report covering structural, pest and compliance findings. Inspectors who price only for the on-site time, treating report writing as an unpriced extra folded into the inspection fee, are effectively discounting every job by however long the write-up genuinely takes. Tracking actual time spent on report writing, even informally, is what makes it possible to see whether the current fee structure genuinely reflects the real time involved.
| Cost or time category | Often left untracked | Effect if untracked |
|---|---|---|
| Report writing time | Treated as included in the inspection fee automatically | Effectively discounts the job by the actual write-up time |
| Professional indemnity insurance | Folded into general insurance expense | Hides the real, growing cost of carrying this cover as claims exposure increases |
| Equipment depreciation (moisture meters, thermal cameras, drones) | Expensed once at purchase, or ignored | Understates the true ongoing cost of maintaining a properly equipped inspection business |
| Vehicle costs | Estimated roughly rather than logged | Distorts true job profitability, since travel is a real cost of every inspection |
Get Your Inspection Business's Real Numbers Sorted
We track contractor income across multiple agencies, report-writing time, insurance costs and equipment depreciation properly, so you know what each inspection actually costs to deliver.
Book a Free 20-Minute CallGST and Invoicing Across Referral Sources
| Referral source | How the fee typically arrives | What the books need to show |
|---|---|---|
| Direct client booking | Invoiced directly to the property buyer or seller | Standard GST-registered invoicing, straightforward |
| Real estate agency referral | Sometimes a referral fee is paid back to the agency | Referral fees tracked as their own expense line, not netted off inspection revenue |
| Panel or franchise arrangement | Inspector invoices the panel, panel invoices the end client, or vice versa | Clear records of exactly which party invoiced which, to avoid double-counting revenue |
Insurance as a Real, Trackable Cost
Professional indemnity and public liability insurance are not optional extras for a property inspector, they are core to the business and represent a genuine, often growing cost as claims exposure and premiums both rise across the industry. Tracking this as its own clearly labelled expense line, rather than folding it into general insurance or overheads, makes it visible when reviewing whether current inspection fees still cover the full cost of running the business responsibly.
Vehicle and Equipment: Depreciation Done Properly
A property inspector's vehicle and specialist equipment, thermal imaging cameras, moisture meters, drones for roof inspections, represent genuine ongoing capital costs, and depreciation should reflect their real useful life rather than being ignored or expensed inconsistently. The instant asset write-off, now permanent at $20,000 from 1 July 2026, is directly relevant to equipment purchases here, but only if the books are structured to claim it correctly rather than lumping equipment into a general expense category.
Recording Multiple Inspection Types Distinctly
An inspector who offers building inspections, pest inspections, and combined reports at different price points benefits from tracking revenue by inspection type rather than one blended "inspection income" line. This makes it possible to see which service is actually most profitable once travel time, report writing and any subcontracted specialist input (a separate pest technician, for instance) are properly accounted for against each type, rather than assuming all inspection types carry the same margin because they are all broadly "an inspection."
GST on Inspection Fees
Property and building inspection fees are a standard taxable supply, and GST applies in the usual way once an inspector is registered. Where this gets more complicated is bundled service offerings, a combined building and pest inspection sold as one fee, which should still be treated consistently for GST purposes as a single taxable supply, with the components not requiring separate GST treatment from each other.
Seasonal Cash Flow in an Inspection Business
Property inspection volume tends to move with the broader property market, busier during active selling seasons, quieter over holiday periods and in a slower market. An inspector running month to month without a cash reserve can feel every one of these fluctuations directly in take-home income, while one with a modest buffer built up during busier periods rides out the quieter months without the same pressure to accept every job regardless of fit or price. Monthly bookkeeping that tracks the pattern of inspection volume over a full year, not just the current month, is what makes this seasonality visible and plannable rather than a recurring surprise.
Common Mistakes in Property Inspector Bookkeeping
- Report writing time never tracked, quietly discounting every job
- Insurance folded into general expenses, hiding a real and growing cost
- Equipment expensed inconsistently rather than depreciated properly
- Contractor records too thin to support the classification if ever reviewed
What to Ask a Bookkeeper Before Hiring Them
- "How would you track our income across multiple agencies as a contractor?"
- "Do you track report-writing time as part of job costing?"
- "How would you handle equipment depreciation and the instant asset write-off?"
- "Are you a registered BAS agent?" Verify at tpb.gov.au.
An inspector who gets confident, specific answers to all four questions has found someone who understands the business, not just bookkeeping in the abstract.
What This Typically Costs
Fixed monthly bookkeeping for a property inspection business generally runs from $250 to $600 for a solo inspector, rising if the business runs multiple inspectors or subcontracts work out. Quoted after a free assessment of your actual file. Inspectors running a genuinely seasonal volume pattern should mention this at the assessment stage, since it affects how cash flow reporting should be structured, not just the fee itself.
The Bottom Line
Property inspectors lose margin quietly, not dramatically, through unpriced report writing, under-tracked insurance costs, and inconsistent equipment depreciation. None of these require a bigger business to fix, they require books built around how an inspection business actually earns and actually spends.