DIY vs Contractor Savings Calculator
Example: Contractor quote: 4000 $ · DIY material cost: 1500 $ · Tool rental or purchase: 300 $ · Hours it will take you: 40 hrs · Value of your time per hour: 30 $
| Cash saved | $2,200 |
| Net saving (after your time) | $1,000 |
| DIY out-of-pocket | $1,800 |
Worked example
A contractor quotes $4,000. Doing it yourself costs $1,500 in materials plus $300 in tool rental, so your out-of-pocket is $1,800 and the raw cash saving is $2,200. But if it takes you 40 hours and you value your time at $30 an hour, that is $1,200 of your time, leaving a net saving of $1,000. Still worth it here, but far less than the $2,200 the cash number suggested.
Frequently asked questions
How should I value my own time?
One approach is your after-tax hourly wage, since that is what an hour is worth if you could work instead. Another is simply what you would pay to get the weekend back. There is no single right number, so try a low and a high value to see how much your answer depends on it.
What if I already own the tools?
Set the tool cost to zero, or to only the consumables like blades and sandpaper. If a specialized tool is worth buying only for this job, include its full price; if you will reuse it for years, you might count only a fraction. The choice shifts the out-of-pocket line.
Does this account for quality and warranty?
No, and that matters. A contractor typically carries insurance and offers a workmanship warranty, and a botched DIY job can cost more to fix than the original quote. Treat the net saving as one input, alongside your skill, the risk, and whether the work is structural or cosmetic.
When is DIY clearly worth it?
DIY tends to win when labor is a big share of the quote, the task is low-risk and forgiving, you value your time modestly, and you already have the tools. It tends to lose on fast, specialized, or dangerous work where a pro is quick and a mistake is expensive.