Dental practices are among the more technically demanding clients in a general bookkeeping practice. They combine a predominantly GST-free health services revenue stream with complex entity structures, practitioner income allocation arrangements, significant capital equipment, and the full suite of employer obligations. Getting the foundational bookkeeping right from the outset avoids a common cluster of errors that compound every year.
Entity Structures: Sole Trader, Trust, or Company
Most dental practices operate through one of three structures, each with distinct bookkeeping requirements.
Sole trader is the simplest. The dentist is personally liable, reports practice income on their individual tax return, and there is no separate legal entity to maintain. The structure limits income-splitting opportunities and exposes personal assets to practice liabilities.
Discretionary trust is common for established practices, particularly where a spouse or family members have lower marginal tax rates. Practice income flows into the trust, and the trustee distributes to beneficiaries each year before 30 June. Bookkeeping must maintain the trust's accounts separately, record distribution resolutions correctly, and track distributions payable as liabilities until paid. Where the trust makes unpaid present entitlements to a company beneficiary, Division 7A of the Income Tax Assessment Act 1936 (ITAA 1936) may apply.
Company structures are used where retained earnings reinvestment is a priority or multiple practitioners hold ownership interests. The company pays corporate tax (25% for base rate entities below the $50 million aggregated turnover threshold), and dividends to shareholder-dentists carry franking credits. The bookkeeper must maintain a dividend account, track the franking account balance, and ensure any shareholder loans are managed in accordance with Division 7A.
Practitioner Income vs. Practice Income
A fundamental distinction in dental practice bookkeeping is between income generated by the practice entity (facilities, support staff, administration) and income personally generated by a practitioner-dentist. Where a dentist provides services through a service trust arrangement, the trust invoices patients and pays the dentist a service fee.
The service fee must be commercially reasonable. The ATO's guidelines on alienation of personal services income under Subdivision 86-A of ITAA 1997 apply where more than 50% of a practitioner's income comes from one source and certain tests are failed. If the PSI rules apply, the trust cannot split income to other beneficiaries — all net income is attributed back to the practitioner.
Superannuation for Dentists
Employer superannuation obligations apply in the usual way for employed associates and practice staff. The Superannuation Guarantee rate is 11.5% for the 2024–25 income year, rising to 12% from 1 July 2025.
For practitioner-owners operating as sole traders or through a trust, superannuation contributions are voluntary but highly tax-effective. Concessional contributions (including personal deductible contributions under s.290-150 of ITAA 1997) are taxed at 15% in the fund rather than at the applicable marginal rate. The annual concessional cap is $30,000 (indexed from 2024–25). Dentists with income exceeding $250,000 pay an additional 15% Division 293 tax on concessional contributions above the threshold.
GST on Dental Services
Most dental services are GST-free under section 38-7 of the A New Tax System (Goods and Services Tax) Act 1999. A dental service is GST-free if it is provided by a registered dental practitioner to treat, diagnose, or prevent a dental or oral health condition.
However, the GST-free status has limits that dental practices frequently misapply:
- Purely cosmetic procedures — teeth whitening performed for aesthetic reasons only, with no clinical treatment rationale, may be a taxable supply. The ATO's position is that a supply is GST-free only if its purpose is therapeutic or diagnostic, not purely cosmetic.
- Dental consumables sold over the counter — whitening kits, mouthguards, and retainers sold directly to patients (not as part of a clinical service) may be taxable supplies under the standard GST rules.
- Practice management or room-hire fees — where a service entity invoices the practitioner for rooms, equipment use, and staff support, that fee is a taxable supply (it is not a health service itself) and GST applies at 10%.
The practical implication is that most dental practices are registered for GST but make predominantly GST-free supplies. Input tax credits are claimable only to the extent inputs are used in making taxable supplies. An apportionment method is required — typically a revenue-based apportionment (taxable revenue as a percentage of total revenue) — documented consistently and defensible at audit.
Equipment Depreciation
Dental practices invest heavily in capital equipment: dental chairs ($20,000–$60,000 each), digital OPG and X-ray imaging ($50,000–$150,000), intraoral scanners, autoclaves, and surgery fit-out costs. Depreciating these assets correctly affects both financial reporting and the practice's tax position.
Under Division 40 of ITAA 1997, assets are depreciated over their effective life. The ATO publishes effective lives in Tax Ruling TR 2023/1:
- Dental chairs: 10 years
- X-ray and OPG equipment: 10 years
- Intraoral scanners and CAD/CAM systems: 5 years (shorter life due to technological obsolescence)
- Sterilisation and autoclave equipment: 10 years
- Dental fit-out (cabinetry, plumbing, electrical): 10–15 years depending on the component
For small business entities with aggregated turnover under $10 million, check the current instant asset write-off threshold at the time of asset acquisition — thresholds have varied significantly in recent years and should be confirmed with the ATO or your principal before advising clients.
Lab Costs and Other Deductible Expenses
Laboratory fees — payments to dental labs for crowns, bridges, implant components, dentures, and other prosthetics — are a significant cost for clinical dental practices. They are deductible under s.8-1 of ITAA 1997 as ordinary business outgoings. If the lab is overseas, consider whether royalty withholding obligations arise under Division 11B, though most Australian dental labs operate domestically.
Other common deductible expenses include: professional indemnity insurance, AHPRA registration and annual practising fees, continuing professional development (CPD) costs, and personal protective equipment.
Reconciling Dental Revenue Streams
Dental practices typically receive payments from three sources: direct patient payments, health fund reimbursements via HICAPS (settled in batches), and Medicare rebates for applicable bulk-billed items. Each stream arrives as a separate bank entry on different cycles. ReconLink's vendor normalisation and coding rules handle HICAPS batch settlements and Medicare credits automatically once the initial rules are configured, keeping reconciliation clean even for high-volume practices.
Legislation and Further Reading
- A New Tax System (Goods and Services Tax) Act 1999, ss.38-7, 38-10 — GST-free health services
- Income Tax Assessment Act 1997, Subdivision 86-A — personal services income
- Income Tax Assessment Act 1997, Division 40 — capital allowances and depreciation
- Income Tax Assessment Act 1997, s.290-150 — personal superannuation contribution deductions
- ATO Tax Ruling TR 2023/1 — effective lives of depreciating assets
- ATO: GST and health (www.ato.gov.au/Business/GST/In-detail/Your-industry/Health/)
- ATO: Personal services income (www.ato.gov.au/Individuals/Income-and-deductions/Income-you-must-declare/Personal-services-income/)