DIY or hire a pro? Running the real numbers
Your time has a price
Doing a renovation yourself looks cheaper at first glance because you skip the labor bill. But DIY has costs of its own: tools you need to buy or rent, materials wasted while you learn, the hours you put in, and the risk of having to pay someone to fix mistakes. This calculator puts those factors side by side. It adds materials, tools and your hours multiplied by the value you place on your time, and compares the result with a contractor’s quote.
The “effective hourly saving” tells you what you are actually earning per hour by doing it yourself. If that number is lower than what your free time is worth to you, hiring may be the better deal.
Be realistic about hours
Professionals work fast because they have done the same task hundreds of times and own the right tools. A first-timer will often take two to three times as long, especially on tile, drywall finishing and trim carpentry. Include preparation, trips to the store, clean-up and waiting for things like adhesive or paint to dry. Weekend-only projects also stretch out over weeks, which can be a real cost if a kitchen or bathroom is unusable.
Jobs that suit DIY — and jobs that don’t
Painting, simple demolition, assembling flat-pack cabinets, laying click-together flooring and installing shelving are classic DIY wins: low risk, modest tool costs and big labor savings. Electrical work, gas lines, structural changes, roofing and major plumbing are a different story. In many regions they legally require licensed professionals and inspections, and mistakes can be dangerous or affect your insurance and resale.
A hybrid approach often works best. Do the demolition, painting and clean-up yourself, and hire pros for the skilled or regulated parts. Many contractors are happy to quote for part of a job.
Quality, warranty and resale
Professional work usually comes with a warranty; your own does not. Uneven tile, visible drywall joints or squeaky floors can lower the impression buyers have of your home. On the other hand, careful DIY work done with patience can be excellent. Be honest about your skills, watch tutorials, practise on offcuts, and invest in good tools that you will use again.
Use the result as a decision aid, not a verdict. Safety first: if in doubt, consult a qualified contractor.
How it's calculated
DIY cost = materials + tools + your hours × the value of your time. We compare that with the contractor's quote. The effective hourly saving shows what you 'earn' per hour by doing it yourself.
Worked example
$1,200 materials + $250 tools + 30 h × $25 = $2,950 vs a $3,200 quote. DIY saves $250, or about $58 per hour of work in pure cash terms.
Frequently asked questions
+Which jobs are good for DIY?
Painting, flooring, simple tiling, trim and demolition are popular DIY jobs.
+When should I always hire a pro?
Electrical, gas, structural and most plumbing work — for safety and permit reasons.
+How do I value my time?
Use your hourly pay, or what you'd pay someone else to free up that time.
+Should I count mistakes?
Yes. First-timers should add 10–20% to materials for rework.
