Estimate the total cost of a DIY or remodel project. Enter materials, labor, any other costs, and a contingency to get a planning total.
Usage Tip
Get at least two or three quotes for both materials and labor. The contingency line is not padding — it is the money that keeps a surprise from stalling the project.
Labor = hours × rate
Total = (materials + labor + other) × (1 + contingency%)
Contingency covers tax, surprises, and small extras.
For several materials, total them separately and enter the sum, or run the calculator once per material.
This excludes permits and equipment rental unless you add them under other costs, and sales tax varies by location.
How to Estimate Project Costs
A complete estimate has five parts: materials, labor, permits and fees, equipment or rental, and a contingency for the unexpected. Total the first four, add a contingency percentage on top, then add sales tax on the taxable portion (usually materials and equipment). Skip any one of these and your real cost creeps past your number.
Labor vs Material Cost
On most projects labor and materials are the two big buckets, and the split surprises people. Material-heavy jobs (flooring, decking) can be half materials; labor-heavy jobs (painting, drywall, tile) are mostly labor. Doing it yourself removes the labor line – often 30 to 50% of a contractor total – but adds tool, time, and mistake costs that belong in your budget.
Typical Budget Split
A rough sanity check for a whole-project budget:
| Category | Typical share |
|---|---|
| Materials | 40-60% |
| Labor | 30-50% |
| Permits & fees | 2-8% |
| Contingency | 10-20% |
If your breakdown is wildly different from this, something is probably missing or mis-estimated – a useful gut-check the calculator percentages give you instantly.
Contingency Planning Guide
Contingency is money set aside for what you cannot see yet: rot behind the siding, an out-of-square wall, a price jump, a tool that breaks. Use about 10% for simple, well-known work, 15% for remodels, and 20% for older homes or anything opening up walls. Example: a $6,000 project at 15% contingency reserves $900 – the difference between a surprise and a crisis.
Common Hidden Costs
The line items that quietly blow budgets:
- Permits, inspections, and HOA fees
- Dumpster, disposal, and tear-out / haul-away
- Tool and equipment rental, plus delivery charges
- Fasteners, adhesives, blades, and other consumables
- Sales tax on materials and equipment
- Repairs to whatever you uncover
- The extra trips for the thing you forgot
DIY vs Contractor
Doing it yourself mainly saves the labor line, but a contractor bid bundles labor, overhead, markup, warranty, and speed. Example: a deck quoted at $7,500 might break down to roughly $3,000 materials and $4,500 labor – doing it yourself could land near $3,500 with tools and waste, but costs you the weekends and the risk. Compare bids by asking each contractor to itemize materials, labor, and allowances so you are comparing the same scope.
Remodeling & Renovation Tips
- Get three itemized bids and compare line by line, not just bottom lines.
- Lock material selections early – change orders are where budgets die.
- Phase big projects so a cost overrun in one phase does not stall the rest.
- Keep 10-20% of the budget untouched until the project is truly done.
- Track actual spend against your estimate as you go.
Common Budgeting Mistakes
- Budgeting materials only and forgetting labor, tax, and fees.
- No contingency – then the first surprise becomes a stoppage.
- Using national averages for a high- or low-cost local market.
- Forgetting tax and delivery on big material orders.
- Underestimating your own time on a DIY job.
Frequently Asked Questions
How do I estimate the total cost of a project?
Add materials, labor, permits, and equipment, add a contingency percentage, then add tax on the taxable portion. The calculator above totals all of it and shows the breakdown.
How much contingency should I budget?
About 10% for simple work, 15% for remodels, and up to 20% for older homes or projects that open up walls.
What percentage of a project is labor?
Commonly 30 to 50% of the total, higher for labor-intensive work like painting, tile, and drywall.
Is sales tax charged on labor?
It varies by state. Materials and equipment are usually taxable; labor often is not. The calculator applies tax to materials and equipment by default.
Do I need a permit, and does it cost much?
Many structural, electrical, plumbing, and exterior projects require permits. Fees are usually a small percent of project cost but vary widely by locality – check with your building department.
How accurate is this estimate?
It is a planning estimate. Prices vary by region, season, and supplier, so treat it as a budget target and confirm with local quotes.
Related Cost Calculators
Note: all figures are planning estimates and approximations. Material and labor pricing varies significantly by region, season, and supplier, and permit requirements differ by locality – confirm with local quotes and your building department. Always carry a contingency for the unexpected. General DIY budgeting guidance, not a professional cost estimate or quote.