What this guide helps you decide
Build dirt work bids with machine hours, labor, material, hauling, disposal, mobilization, scope notes, and profit margin.
Choose the pricing unit only after defining the result: lump sum, hourly, per cubic yard, per ton, per load, or a documented allowance. The estimate should show which quantities are measured and which can change.
Define the result
Dirt work can mean rough grading, finish grading, excavation, driveway prep, drainage correction, material spreading, cleanup, or hauling. A good bid starts by naming the result the customer is buying.
Use a scope-specific model when one operation controls the job. The gravel driveway calculator connects placed dimensions with material and delivery; the land-clearing calculator and forestry mulching calculator separate two different vegetation-removal methods. If slab removal must happen before the earthwork, price that defined demolition and disposal with the concrete removal calculator rather than hiding it inside excavation hours.
Measure quantities
Area, depth, cubic yards, tons, linear feet, truck loads, and machine hours should be estimated before price. Even rough measurements are better than guessing from memory.
Write down the measurement method and material state. A measured excavation volume in the ground is not automatically the same as loose truck volume or compacted fill volume. Keep a separate line for each operation: dig, load, haul, place, compact, and finish. One cubic yard may pass through several operations, but each has its own production assumption.
Separate allowances
An allowance needs a quantity, unit, included amount, and agreed adjustment method. “Disposal extra” leaves too much unresolved. A useful estimate might include a stated tonnage at a named facility, explain what the fee covers, and require approval before additional loads. Confirm the actual terms with the customer before work; the calculator does not create that agreement.
When the truck cycle can be measured, replace a broad allowance with the Dump Truck Cycle and Hauling Cost Calculator, then document the unit and quote terms with the Dump Truck Hauling Rate Guide.
Add risk before margin
Account for a known condition in the affected operation. If narrow access slows loading, change loading hours or production; do not also apply a second allowance for the same delay. For a condition you cannot measure before starting, document what is included and what finding would require a revised scope, price, or schedule. A larger profit margin does not explain an undefined scope.
Write exclusions
A clear dirt-work bid should say what is not included: permits, engineering, utility relocation, hidden debris, imported material, compaction testing, seeding, or final landscaping if those are outside the job.
Worked bid: a small driveway reshaping job
Suppose the agreed work is to reshape the existing surface, spread a specified top-up quantity of stone, remove the agreed spoil, and leave the stated finish. These sample costs illustrate the arithmetic; they are not local rates, material quotes, or a recommendation for your machine.
- Machine: 6 hours × $85 internal cost = $510. The sample rate includes machine ownership, fuel, and maintenance, but excludes the operator.
- Operator: 8 on-site paid hours × $35 loaded labor cost = $280. Two hours are for layout and hand cleanup rather than machine operation.
- Specified material allowance: $420.
- Hauling and disposal allowance: $260.
- Mobilization cost, including off-site transport time: $180.
Total internal cost is $1,650. At a sample 25% target margin, $1,650 ÷ 0.75 gives a $2,200 quote and $550 planned profit. In the dirt-work bid calculator, use 6 machine hours, $85 machine cost per hour, 8 labor hours, $35 labor cost per hour, $420 materials, $260 hauling/disposal, $180 mobilization cost, and 25% margin.
The price only covers the stated job. Confirm the material specification, quantity, access, finish, and disposal assumptions. Identify drainage design, unexpected buried material, additional imported stone, or restoration that is outside this scope before accepting it.
Close the bid with tickets and time, not memory
On the driveway example, compare the six estimated machine hours with meter records, the eight paid hours with timecards, and the material and disposal allowances with delivery and dump tickets. If the operator worked longer, identify whether the cause was more scope, slower access, waiting, or an estimating error before changing the production rate.
Keep the accepted scope and approved additions separately. The estimate versus actual guide shows how to review the original job without hiding extra work in its costs.
Optional project software
Keep the bid assumptions with the job records
A spreadsheet and a job folder can be enough. If you need a shared system for estimates, change orders, daily logs, and project expenses, Contractor Foreman is one option to evaluate. Check that your setup keeps the accepted scope, added work, hours, and receipts easy to compare; a software total is only as useful as the records entered.
Equipment Rate Calc is a Contractor Foreman affiliate. We may earn a commission if you purchase through this link.
Explore Contractor Foreman (opens in a new tab)Dirt-work bidding questions
Does Equipment Rate Calc publish local market prices?
No. Dirt-work prices can refer to very different results, soil, access, haul distance, finish, and risk. Build the cost and scope first, then compare only current local quotes that use the same unit and included work.
When should a dirt-work estimate be rebuilt?
Rebuild it after a material change in dimensions, soil or water, access, haul route, dump destination, supplier quote, machine or crew, compaction, finish, schedule, or customer scope. Reconcile the assumptions again after each comparable completed job.
Does this guide determine safe excavation or engineered quantities?
No. Current utility-locate information, project plans, permits, geotechnical or engineering direction, environmental requirements, manufacturer instructions, competent-person duties, and contract terms control where applicable.
Move from field production to a bid
The production and unit-cost calculator supplies an evidence-based production rate and internal cost. Use those results as inputs—not substitutes—for the full dirt-work scope and customer price.