Free South Australia Trailer Bill of Sale
Private trailer sales in South Australia are subject to the same 1-business-day seller notification rule and $4-per-$100 stamp duty as all vehicle transfers. Whether selling a box trailer, horse float, or boat trailer, the seller must notify Service SA within 1 business day and the buyer must complete the transfer and pay duty within 14 days.
Free PDF includes a small watermark at the bottom. Remove it for €4.99. Already subscribed? Sign in.
South Australia Trailer Bill of Sale — What You Need to Know
Stamp Duty / Tax Details
Stamp duty on private trailer sales is $4 per $100 of market value. Revenue SA assesses duty on the higher of the sale price and market value.
Inspection / Roadworthy Requirements
No roadworthy certificate is required for private trailer sales in SA, though trailers used on public roads must meet ongoing roadworthy standards.
South Australia Trailer Sale — Step-by-Step Checklist
- Record the trailer's VIN or chassis number, type, make, year, tare weight, ATM, and agreed sale price on the bill of sale.
- Seller lodges Change of Ownership notification at sa.gov.au within 1 business day.
- Buyer completes the vehicle transfer at Service SA within 14 days and pays stamp duty at $4 per $100.
- Check that the trailer's brakes, lights, tyres, and coupling are in serviceable condition before delivery.
- If the trailer carries a boat, complete the vessel registration transfer separately.
- Both parties retain signed copies of the bill of sale.
Common Pitfalls
- Missing the 1-business-day notification for a seemingly low-value trailer: even small trailers can generate infringements if left unnotified in the seller's name.
- Failing to record the ATM: the ATM (aggregate trailer mass) is required on the transfer form and determines whether the towing vehicle has the correct mass rating.
- Conflating trailer and boat sale duty: if the trailer and boat are sold together, Revenue SA may assess duty on the combined value — itemise each component separately on the bill of sale.
- Selling a home-built trailer without a VIN: unregistered home-built trailers require an inspection and VIN assignment from Service SA before transfer can be completed.
Pro Tip
In SA, the 1-business-day window is the most critical deadline in the state. Sellers should submit the online notification immediately after handing over the trailer — failure to do so risks weeks of parking and camera fines continuing to arrive in the seller's name.