How to Bid Concrete Jobs: The Complete Guide for Contractors

Bidding concrete jobs is the single most important skill in running a concrete business. Bid too high and you lose work. Bid too low and you lose money. This guide walks you through the exact formula experienced concrete contractors use to create accurate, profitable bids.

The Concrete Bidding Formula

Every concrete bid comes down to this formula:

That's it. The challenge is getting each component right. Let's break down every piece.

Step 1: Calculate Material Costs

Material is usually 25-35% of the total bid. Start with the concrete itself, then add reinforcement, forms, and finishing materials.

Concrete Volume

Use this formula to calculate cubic yards:

Cubic Yards = (Length × Width × Thickness in feet) ÷ 27

Always add 10% for waste. You'll need it — ground is never perfectly level, forms bow slightly, and you can't return unused concrete.

2026 Concrete Pricing

Short load fees: Most ready-mix companies charge $50-$100 extra for orders under 5 cubic yards. Factor this in for small residential jobs.

Reinforcement Costs

Form Material

Wood forms cost $0.50-$1.00 per linear foot of material. Budget $1-$2 per linear foot when you include stakes and oil. For a 20×20 slab, that's 80 linear feet = $80-$160 in form material.

Step 2: Calculate Labor Costs

Labor is typically the largest cost — 35-45% of most residential concrete bids. There are two ways to calculate it:

Method 1: Per Square Foot (Quick)

Total labor for a standard broom-finished slab: $5-$10 per square foot, depending on complexity and your region.

Method 2: Hourly Rate (Precise)

For more accurate bids, estimate how many crew-hours the job will take:

1. Estimate total hours per task (prep, form, pour, finish, cleanup)
2. Multiply by crew size (most residential pours need 3-4 people)
3. Multiply by your burdened labor rate — not just wages, but also payroll taxes, workers comp, insurance, and benefits (typically 1.3-1.5× the hourly wage)

Example: A 400 sq ft driveway might take a 3-person crew 8 hours. At a burdened rate of $35/hour, that's 3 × 8 × $35 = $840 in labor.

Step 3: Equipment Costs

Don't forget the tools and equipment that go into every pour:

• Concrete pump rental: $150-$300+ per pour (for hard-to-reach areas)
• Bobcat/skid steer: $250-$400/day for site prep
• Power trowel rental: $75-$150/day
• Saw cutting: $1-$2 per linear foot for control joints
• Hand tools, fuel, consumables: $50-$100 per job

For jobs where you own the equipment, charge a usage fee to cover depreciation and maintenance — typically $50-$200 per job depending on what you use.

Step 4: Overhead

Overhead is everything that keeps your business running but isn't tied to a specific job:

• Vehicle payments and fuel
• General liability insurance
• Workers compensation insurance
• Business license and permits
• Office expenses, phone, accounting
• Marketing and advertising

Rule of thumb: Overhead typically adds 10-20% to your direct costs. Track your actual annual overhead and divide by the number of jobs you do per year for a precise per-job number.

Step 5: Profit Margin

This is your pay for taking the risk, managing the project, and running the business. Don't skip it — working for free isn't a business plan.

Real-World Bidding Example: 20×20 Patio

Let's walk through a complete bid for a 400 sq ft broom-finished patio, 4" thick, with #4 rebar @ 18" OC.

At $8.90 per square foot for a broom-finished patio, this bid is competitive in most US markets (typical range: $6-$12/sq ft installed).

Quick Pricing Guide by Project Type

Use these ranges as sanity checks when building your bids:

7 Bidding Mistakes That Kill Profits

1. Forgetting the waste factor. Always add 10%. Running short during a pour creates cold joints and costs you $200+ for a short load.
2. Not calculating burdened labor rate. Your guys cost more than their hourly wage. Payroll taxes, workers comp, and insurance add 30-50% on top.
3. Ignoring overhead. Insurance, truck payments, and tools don't pay for themselves. If you don't include overhead, you're paying to work.
4. Bidding without visiting the site. Photos don't show grade changes, access issues, or buried utilities. Always walk the site.
5. Lowballing to get the job. You'll win the work and lose money. It's better to pass on a job than to do it at a loss.
6. Forgetting demolition/removal. Tearing out an old patio or driveway costs $2-$6/sq ft. If the client expects it and you didn't bid it, that's on you.
7. No profit margin. Covering costs isn't a business — it's an expensive hobby. Always add 10-20% profit minimum.

Pro Tips for Better Bids

• Track your actual costs on every job. After each project, compare your bid to actual costs. This is how you get better at estimating.
• Build a pricing spreadsheet. Or use our Pro Estimate Template — it auto-calculates material, labor, and margin from dimensions.
• Present professional estimates. A clean, itemized bid builds client confidence and justifies your price. Handwritten quotes on scrap paper lose jobs.
• Adjust for complexity. Stamped concrete, colored pours, slopes, tight access, and decorative work all deserve higher margins.
• Get good at saying no. Not every job is worth doing. If a client wants a $3/sq ft installed price, let your competitor take the loss.

Use Our Free Concrete Calculator

Start every bid with accurate material quantities. Our Concrete Slab Calculator gives you cubic yards, bags, rebar estimates, and cost breakdowns in seconds. It's free and built specifically for contractors.