Watch auction break-even calculator
Find the sale price needed to recover a watch’s purchase premium, transport, servicing, holding costs, and selling fees. Change the inputs to update the chart or diagram.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- Total acquisition and holding cost = × (1 + ÷ 100) + + + +
- Net sale proceeds = × (1 − ÷ 100) −
- Net transaction profit or loss = Net sale proceeds − Total acquisition and holding cost
- Break-even sale hammer price = (Total acquisition and holding cost + ) ÷ (1 − ÷ 100)
- Worked example: A watch bought for USD 10,000 plus a 10% buyer premium and USD 1,000 of other costs has a USD 12,000 cost basis. A USD 14,000 sale, less a 10% seller fee and USD 100 fixed fee, leaves USD 500 profit.
- Net transaction profit or loss = 14,000 × 0.90 − 100 − 12,000 = 500 USD; Break-even sale hammer price = 12,100 ÷ 0.90 ≈ 13,444.44 USD.
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
All amounts use one currency. Purchase tax and import charges must be supplied by the user; this is not a tax calculation. Percentage fees are effective flat rates for the chosen lot; tiered schedules must be converted to their actual effective rate. Profit excludes income or capital-gains tax and currency changes. Sale price is the hammer price before buyer premiums.
