Auction Budget Calculator
Work out your maximum auction bid and total cash needed on the day, including deposit and buyer costs you enter.
Your results
Calculation breakdown
- Deposit due
- maximum bid × deposit %
- All-in cost
- maximum bid + buyer costs
Worked example
Bidding up to $620,000 with a 10% deposit means $62,000 due on the day, with total costs including duty and fees around $644,000.
Assumptions
- Deposit terms are set by the agent and vendor and should be confirmed in the contract of sale.
- Most states have no cooling-off period once the hammer falls at auction.
How this calculator works
Buying at auction means paying a deposit immediately and being legally bound with no cooling-off period in most states. This calculator shows the deposit due on the day and total upfront cash needed based on your maximum bid and buyer cost estimates.
Frequently asked questions
Is there a cooling-off period at auction?
Generally no — once the hammer falls at auction, the contract is usually unconditional, so have finance and inspections finalised beforehand.
What deposit percentage is typical?
10% is common, but auction terms are set by the agent and vendor, so check the contract of sale for the exact deposit required.
Should I budget above my planned bid?
Yes, it's wise to have a small buffer in mind in case bidding pushes slightly above your initial limit.
Results are estimates only and are not financial, tax, legal or credit advice.