Knowing how to price concrete is only half the job. The other half is putting that price into a bid the general contractor or owner can compare, trust and accept. A strong concrete bid proposal spells out exactly what you will pour, what you will not, and the conditions your number depends on. A weak one leaves room for scope arguments, change-order disputes and thin margins.
This guide walks through what to include when you bid a concrete job, from the takeoff behind the number to the exclusions and clarifications that protect it. If you want help with the pricing side first, start with our guide on how to price concrete jobs.
What Is a Concrete Bid Proposal?
A concrete bid proposal is the document a concrete contractor submits to win a project. It turns your estimate into a written offer: the scope of work, the price, the schedule assumptions and the terms you are agreeing to. On commercial work it is usually submitted to a general contractor on bid day; on residential and light commercial work it often goes directly to the owner or builder.
The estimate is your internal math. The proposal is what the customer actually reads, so it needs to be clear enough that someone outside your company understands exactly what they are buying.
Start With an Accurate Concrete Takeoff
Every number in the proposal comes from the takeoff. Before you write a single line of scope, make sure the quantities are complete and checked against the latest drawings and addenda. A typical concrete takeoff covers:
- Footings and foundations – continuous footings, spread footings, grade beams, piers and pile caps, measured in cubic yards.
- Foundation walls and stem walls – wall area for formwork, volume for concrete.
- Slabs on grade – square footage by thickness, plus thickened edges and turndowns.
- Elevated slabs and decks – including shoring, edge forms and any metal deck fill.
- Flatwork – sidewalks, curbs, gutters, driveways, pads and ramps.
- Reinforcing – rebar by size and length (converted to weight), welded wire mesh and dowels.
- Accessories – vapor barrier, base rock, embeds, anchor bolts, expansion and control joints, sealers and curing compound.
Add a waste factor appropriate to each element and your crew’s experience, and record it in the estimate so you can defend it later. If you are unsure what a takeoff should include, our guide to quantity takeoffs explains the process step by step.
What to Include in a Concrete Bid
1. Project information and bid basis
List the project name and address, the bid date, and the exact drawing set, specification sections and addenda your price is based on. If the GC later issues a revised sheet, this line is what proves your number was built on the earlier version.
2. A clear scope of work
Describe the work you are including in plain language, organized by element: footings, walls, slabs, flatwork, site concrete and so on. Reference specification sections where possible. Avoid vague phrases such as “all concrete work per plans,” which can pull in items you never priced.
3. Price breakdown
Many GCs want a lump sum, but a breakdown by major element (foundations, slab on grade, elevated slabs, site concrete) helps them level bids and makes value engineering easier. Consider adding unit prices for common changes, such as additional slab per square foot or additional footing per cubic yard, so changes can be priced quickly.
4. Alternates
If the bid documents ask for alternates, price each one separately and state whether it adds to or deducts from the base bid. You can also offer voluntary alternates, such as a different finish or joint layout, as long as they are clearly separated from the base price.
5. Inclusions
Spell out what is included that the customer might otherwise question: pump time, winter protection, hot water or accelerators, finishing type (broom, steel trowel, exposed aggregate), curing and sealing, joint cutting, and testing coordination.
6. Exclusions
Exclusions are where most concrete disputes start, so be specific. Common exclusions include:
- Excavation, backfill, compaction and fine grading (unless you are carrying them).
- Rock excavation, dewatering and unsuitable soil removal.
- Testing and inspection fees, special inspections and permits.
- Layout and surveying beyond your own control lines.
- Embedded items supplied by other trades, such as sleeves, conduit and anchor bolts for others.
- Bonds, unless requested and priced.
- Overtime, weekend or night work not shown in the schedule.
7. Clarifications and assumptions
State the conditions your price depends on: site access for trucks and pumps, number of mobilizations, pour sequence, who provides water and power, and how many days of standby are included. If you assumed a certain mix design or slump, write it down.
8. Schedule and duration
Give your expected duration and any lead times, for example for rebar fabrication or special forming systems. Note that weather delays and work by others may affect the schedule.
9. Validity period and escalation
Concrete, rebar and fuel prices can move between bid day and the pour. Include how long your price is valid and, where appropriate, a clause addressing material price increases after that date.
10. Terms, insurance and signature
Close with payment terms, retainage expectations, insurance coverage you carry and a signature line. Attach a copy of your license or prequalification documents if the bid package requires them.
How to Price the Bid Before You Write It
Once quantities are set, build the price in layers:
- Materials – ready-mix by cubic yard (including short-load or after-hours charges if they apply), rebar, forms, accessories and consumables. Get current supplier quotes rather than relying on old pricing.
- Labor – crew size and production rates for forming, placing, finishing and stripping, multiplied by your burdened labor rate.
- Equipment – pump, screeds, power trowels, saws, forklifts and trucks.
- General conditions – mobilization, supervision, cleanup, dumpsters and small tools.
- Overhead and profit – your company overhead and the margin the market will bear for this type of job.
Costs vary widely by region, project size, access and specification, so there is no single “right” price per square foot or per yard. The safest approach is to price each element from your own takeoff and current supplier and labor rates, then compare the result with your historical jobs as a sanity check.
Common Concrete Bidding Mistakes
- Missing addenda – one revised sheet can change slab thickness or rebar across the entire job.
- Underestimating access – tight sites can require a pump, smaller trucks or extra labor.
- Ignoring weather – cold or hot weather protection adds cost and time.
- Vague exclusions – if it is not written down, the customer may assume it is included.
- Rushing the takeoff – small errors in thickness or area multiply quickly across large slabs.
- No unit prices – without them, every change becomes a negotiation.
When to Outsource Your Concrete Estimate
Bid volume often peaks at the same time your crews are busiest. Outsourcing the takeoff and estimate lets you bid more jobs without taking a foreman off the field or working nights. A professional estimator also gives you a second set of eyes on scope gaps before bid day. CSI Estimation prepares detailed concrete estimating services, including quantities for footings, walls, slabs, flatwork and rebar, organized so you can drop the numbers straight into your proposal.
Frequently Asked Questions
How do you bid a concrete job?
Review the drawings, specifications and addenda; complete a quantity takeoff; price materials, labor, equipment and general conditions; add overhead and profit; then submit a written proposal with clear scope, inclusions, exclusions and assumptions.
Should a concrete bid be lump sum or itemized?
Follow the bid form if one is provided. Otherwise, a lump sum with a breakdown by major element and a few unit prices gives the customer clarity while protecting you on changes.
What exclusions should a concrete contractor list?
Typical exclusions are excavation and backfill, rock and dewatering, testing and permits, bonds, embedded items by others and premium-time work, unless you have priced them.
How long should a concrete bid be valid?
Many contractors hold pricing for a limited period, such as 30 days, because material prices can change. State the validity period clearly on the proposal.
Can I get a concrete takeoff without a full estimate?
Yes. Many contractors only need quantities and price the job themselves. CSI Estimation can provide takeoff-only or full estimates depending on what you need.
Bid Your Next Concrete Job With Confidence
A complete takeoff and a clear proposal win more work and lead to fewer disputes. Send your plans to CSI Estimation for an accurate concrete takeoff and estimate you can bid with. Contact us today for a quote.
