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Contractor vs DIY Calculator
Pick a project preset or enter your own numbers. We'll calculate your potential savings, effective hourly pay, and give you a Worth It Score from 0–100 so you can decide with confidence.
Selecting a project fills in typical costs — adjust any values below
Labor only — not including materials
Same for both — you buy materials either way
Total hours to complete the project yourself
What your time is worth (use your hourly wage as a baseline)
Contractors often handle permits — add this if you'd pay separately
Tools you'd need to buy or rent to do it yourself
Medium — structural or code-related
Sources & Methodology
- BLS Occupational Employment and Wage Statistics, median hourly wages for construction trades and skilled contractors
- U.S. Census American Housing Survey, home improvement expenditure data by project type
- NAHB Remodeling Market Index, contractor activity and cost benchmarks for residential remodeling
By Sean Baldwin · Last reviewed July 2026
Frequently Asked Questions
How do I decide whether to DIY or hire a contractor?
The key factors are: potential cost savings vs. your time value, project risk (structural, electrical, or permit-required work is riskier to DIY), your skill level, and whether mistakes could cost more to fix than hiring out would have. This calculator weighs all of these to give you a Worth It Score.
What projects should you never DIY?
Electrical panel upgrades, gas line work, load-bearing structural changes, and most roofing in high-wind zones should almost always be left to licensed contractors. Mistakes can be dangerous, void your homeowner's insurance, and fail home inspections when you sell.
How much can I save by doing home projects myself?
Labor typically makes up 40–65% of a contractor's quote. On a $5,000 project, you might save $2,000–$3,000 by DIYing. However, factor in your time, tool rental or purchase costs, permit fees, and the risk of rework if something goes wrong.
Do I need a permit for DIY work?
It depends on your municipality and project type. Structural work, electrical, plumbing, and HVAC almost always require permits. Cosmetic work (painting, flooring, tile) usually does not. Unpermitted work can cause problems when selling your home and may void your homeowner's insurance.
How do I find a trustworthy contractor?
Get at least 3 quotes, check reviews on Angi or Google, verify their license and insurance in your state, and never pay more than 10–30% upfront. Ask for references from similar projects completed in the past 12 months. Avoid contractors who pressure you to decide same-day.
How to calculate whether DIY actually saves money
The surface math is easy: contractor quote minus material cost equals your potential savings. But the real calculation is harder. You need to divide those savings by the hours the project will take to get your effective hourly rate. If a contractor quotes $1,200 for a job that takes you 12 hours, you're "earning" $100/hour by doing it yourself, and that's probably worth it. If the same job takes you 40 hours because you're learning as you go, your effective rate drops to $30/hour. Factor in tool rental or purchase, permit fees, and any time spent fixing mistakes. A weekend project that stretches into three weekends often ends up costing more in stress and lost time than hiring out would have. The calculator above does this math automatically, the Worth It Score tells you whether your time is better spent elsewhere.
Projects that almost always make sense to DIY
Painting (interior and exterior), installing flooring, tiling backsplashes, replacing light fixtures, installing ceiling fans, caulking and weatherstripping, building simple decks or fences, and landscaping are all solidly DIY-friendly. These projects require common tools, have low risk of serious mistakes, and typically don't require permits. Labor on painting jobs runs $1–$3 per square foot, on a 1,500 square foot interior, that's $1,500–$4,500 in labor alone. The materials cost $200–$500. For most homeowners with a free weekend, this math strongly favors DIY. Flooring is similar: professional installation costs $2–$8 per square foot; the materials are the same regardless of who installs them.
Projects you should almost never DIY
Electrical panel upgrades, gas line work, load-bearing structural changes, roof replacements in high-wind areas, and HVAC installations require licensed contractors in most jurisdictions, not because of arbitrary rules, but because mistakes can be fatal, burn your house down, or void your homeowner's insurance. The permit process exists specifically to catch work that doesn't meet code before it becomes a problem. Beyond safety, unpermitted work is a serious issue when selling your home: buyers' inspectors flag it, lenders won't finance homes with known permit violations, and you may be required to pay to have the work torn out and redone by a licensed contractor at sale time. The cost of hiring a pro for these projects is almost always less than the cost of fixing a DIY mistake.
How to get a fair contractor quote
Get at least three quotes for any project over $500. Quotes for the same job can vary 40–100% between contractors, not because one is doing better work, but because of differences in overhead, availability, and how badly they want the job. Always ask what's included in the quote (materials, permits, cleanup, warranty) so you're comparing apples to apples. Never pay more than 10–30% upfront; reputable contractors don't need full payment before starting. Check their license on your state contractor board's website, verify they carry liability insurance and workers' comp, and read recent reviews on Angi or Google. Ask specifically for references from projects similar to yours completed in the past year. A contractor who can't provide references for recent comparable work is a yellow flag.
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Further Reading
How We Calculate Your Score
The Worth It Score starts at 50 and adjusts based on three factors: how much you save by doing it yourself, the implied hourly rate your labor is worth, and the risk level of the project. High savings and a strong implied hourly rate push the score up; negative savings or a high-risk project bring it down.
- · Base score: 50
- · Savings: over $2,000 adds 25 points; over $1,000 adds 15 points; over $500 adds 8 points; any positive savings adds 2 points; negative savings (DIY costs more) subtracts 15 points
- · Implied hourly rate: over $100/hr adds 15 points; over $60/hr adds 8 points; over $40/hr adds 3 points; under $40/hr subtracts 5 points
- · Risk adjustment: project risk level (low/medium/high) subtracts points proportionally
Implied hourly rate is calculated as your total savings divided by estimated DIY hours. This tells you what your time is effectively worth on this project. A high score means DIY is a strong financial decision; a low score suggests hiring out is the smarter call.
Cite this calculator: Worth It Calculators, "DIY vs Contractor Calculator: What Will It Actually Cost?," worthitcalculators.com/contractor-vs-diy/ (updated July 2026).