Commercial fishing is one of the more technically demanding industries for a bookkeeper to service. The asset base is specialised, export rules interact with GST in ways that differ from other food businesses, crew payment arrangements can be genuinely unusual, and the fuel tax credit entitlement is substantial but frequently overlooked. This guide covers the key areas every bookkeeper working with fishing clients needs to understand.
Vessel and Equipment Depreciation
Commercial fishing vessels are depreciating assets under Division 40 of the ITAA 1997. The ATO's effective life determination (TR 2023/1) gives commercial fishing vessels a 20-year effective life under the Uniform Capital Allowances (UCA) framework. This covers the vessel itself — hull, engine, refrigeration plant, net drum — either as a single composite asset or as separately identified components.
Where components are separately identifiable and have materially different effective lives, the prudent approach is to treat them as separate assets. A refrigeration plant may have a significantly shorter effective life than the hull, and depreciating it separately accelerates the deduction. Once the method and effective life are elected for each asset, they cannot be changed without ATO approval.
Fishing equipment — nets, traps, pots, lines, and sonar — is also depreciable. The effective life for most fishing gear is considerably shorter than the vessel; many items qualify for the low-value pool (under $1,000 per item) where the 37.5% diminishing value rate applies in full years after entry. Keep a detailed asset register: vessels are high-value assets and the ATO examines depreciation claims closely in fishing industry audits.
GST on Fish Exports
Fresh fish and seafood exported from Australia are GST-free under the zero-rating rules for food exports in s.38-185(1)(a) of the A New Tax System (Goods and Services Tax) Act 1999. The same treatment applies to most processed seafood — frozen, smoked, canned, or packaged — where the supply involves export from Australia.
For a supply to be GST-free as an export, the exporter must hold documentary evidence of the export: an export declaration lodged with the Department of Home Affairs (via the Integrated Cargo System), a customs clearance, and evidence of offshore delivery. Without this documentation, the ATO will treat the supply as taxable.
Domestic fish sales to processors, wholesalers, and retailers are taxable supplies in the ordinary way. Input tax credits are available on all business purchases — fuel, bait, gear, vessel maintenance, marina fees — to the extent they relate to the taxable or export supply activity.
Commercial Fishing Licences and Quota Entitlements
Commercial fishing licences and quota entitlements (statutory fishing rights under the Fisheries Management Act 1991) are a significant asset class on a fishing operator's balance sheet, and their tax treatment depends on the nature of the right.
Where a quota or licence has a finite term, it is a depreciating asset under Div 40, and its cost is amortised over its effective life. Where the right is of unlimited duration — a perpetual quota entitlement, for example — it is classified as a non-depreciating intangible and treated as a CGT asset (Class B under the CGT asset categories in s.108-5 of the ITAA 1997). No annual deduction is available for a non-depreciating intangible; the cost is only reflected in the capital gains calculation on eventual disposal.
Transfers of quota between fishing businesses are relatively common as the industry consolidates. Each transfer triggers a balancing adjustment (for Div 40 assets) or a CGT event (for non-depreciating intangibles). The bookkeeper must identify the correct treatment at the time of acquisition and update the asset register accordingly.
Fuel Tax Credits for Fishing Vessels
Fuel tax credits (FTC) represent one of the highest-value but most frequently under-claimed entitlements available to commercial fishing operators. Diesel or biodiesel used in a fishing vessel's engine for sea navigation is eligible for the full FTC rate — not the reduced rate that applies to on-road transport, because commercial sea navigation does not attract the road user charge.
As at the 2026 rate schedule, the full FTC rate for marine vessels is approximately 18 cents per litre. On a vessel consuming several thousand litres of diesel per month, this translates to a substantial annual credit claim. FTC is claimed on the BAS by entering the eligible litres and applying the rate in effect at the time of acquisition.
Keep fuel purchase records (tax invoices or BAS fuel registers) for at least five years. The ATO's fuel tax compliance program cross-checks FTC claims against vessel registration data, fishing licence records, and fuel supplier transaction data.
Crew Wages and Share Arrangements
Some fishing operations pay crew members on a "share" basis — the crew member receives a percentage of the gross catch value rather than a fixed wage. This is an old industry practice and it creates genuine payroll classification questions.
The ATO's test for employee versus contractor status applies in full to fishing crew. A crew member who works exclusively on one vessel, does not operate their own business, and has no ability to subcontract or delegate their work is almost certainly an employee — regardless of whether the payment is called a "share." PAYG withholding and superannuation guarantee contributions apply from the first dollar.
Where the arrangement is genuinely a labour-hire or contractor structure — for example, a skipper who owns their vessel and hires it plus their labour to a fishing company — the classification may differ. Get the arrangement documented in a written contract and assess it against the ATO's contractor decision tool before deciding on the payroll treatment. Misclassification in the fishing industry is a compliance risk that the ATO targets periodically.