Worked examples / Saving money
A job quoted at $1,500 in labour. Doing it takes three weekends and $250 of tools, with a 1 in 5 chance of paying $1,200 to have it put right.

You come out $410 ahead.
This is a worked example with illustrative figures, not data about any real person or company. Change any of them in the calculator and the answer changes with them.
How this answer was worked out| You save | $1,500 |
| Extras | $250 |
| Your time | 30 hours x $20.00 = $600 |
| Risk, on average | 20% x $1,200 = $240 |
| Total cost | $1,090 |
| Net | $1,500 - $1,090 = $410 |
| Cost per $1 saved | $0.73 |
| Break-even value of an hour | $33.67 |
| Break-even chance of it going wrong | 54% |
Every formula is written out on the formulas page.
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