How to Quote Excavation and Earthmoving Jobs

Why accurate quoting decides whether an earthmoving business grows or stalls

Excavation work looks simple on the surface: dig a hole, truck the dirt away. The quoting, though, is where most of the risk lives. The dirt you dig out of the ground takes up more space on the truck than it did in the ground (swell factor). The clean soil the client promised turns out to be clay full of old concrete. The "flat block" has sandstone at 400mm. And every cubic metre you underquote on disposal is money straight off your margin.

Earthmoving contractors who grow consistently quote every layer of the job: mobilisation, dig rates by soil type, haulage, disposal gate fees, rock allowances, compliance, and clean-up. The ones who struggle quote a single lump number based on what they think the dirt will do, then absorb the surprises.

This guide covers each decision in the quoting process with real 2026 Australian benchmarks so you can build quotes that protect your margin on every job.

Step 1: Calculate your true cost per hour

Before setting rates, work out what an hour of machine time actually costs your business. This is your loaded hourly cost, covering everything required to have an operator and machine on site ready to dig.

For an owner-operator running a 5-8 tonne excavator, total annual costs typically land between $145,000 and $280,000. At 1,400-1,600 billable hours per year (allowing for wet weather, transport time, quoting, maintenance, and holidays), your loaded cost per hour sits between $90 and $175.

Fuel is the variable that moves fastest. A 5-tonne excavator burns 8-15 litres per hour depending on the work. A 13-tonne machine burns 15-25 litres. At $1.80-2.20 per litre for diesel, fuel alone is $15-55 per operating hour. Track your fuel consumption by machine and review your rates quarterly.

Your charge-out rate adds a margin of 20-35% on top of loaded costs. Operators who run newer, financed machines need higher margins to cover the repayments. Operators running older, fully owned machines have lower fixed costs but higher maintenance risk.

Step 2: Know the market rates for your machines

Excavation is priced differently depending on the machine. Clients compare your rate against other operators running similar gear, so knowing where your rates sit in the market matters.

Wet hire rates by machine size (operator included, 2026)

Tip truck rates (wet hire, 2026)

Dry hire rates (machine only, no operator) are typically 40-60% of wet hire, but the hirer takes on maintenance risk, fuel, and operator costs. Most residential and light commercial work is quoted as wet hire.

These rates vary by region. Sydney and Melbourne sit 10-20% above the national average due to labour costs, traffic delays, tolls, and disposal distances. Regional areas run lower hourly rates but may charge more for mobilisation due to travel distances.

Step 3: Price by the cubic metre when the scope is clear

Per-cubic-metre pricing works well for bulk site cuts, pool digs, driveway excavations, and any job where the volume can be measured from plans or a site survey. It gives the client a fixed price and makes your quote easy to compare.

Excavation rates per cubic metre by soil type (dig only, 2026)

The swell factor: why it matters for every quote

When soil comes out of the ground, it loosens and increases in volume. One cubic metre of clay in the ground becomes 1.25 to 1.40 cubic metres on the truck. This is the "bank to loose" conversion, and it directly affects how many truck loads you need and how much you pay in disposal.

If you quote 100 cubic metres of in-ground clay removal and price disposal at the bank (in-ground) volume, you will actually truck 125-140 cubic metres. At $60-80 per cubic metre in disposal costs, that is $1,500-3,200 of unquoted expense. Always calculate disposal volume at the loose (swelled) rate, or note in your quote that disposal is charged on the loose volume, not bank volume.

Disposal and tip costs (per cubic metre of loose material, 2026)

State waste levies sit on top of gate fees. In NSW the levy is $154 per tonne for metro Sydney in 2025-26. Victoria charges $125 per tonne for metro areas. Queensland charges $95 per tonne in regulated areas. These levies are included in the gate fees quoted by most tips, but confirm with your disposal facility and factor them into your rates.

Haulage time is the other cost. A tip truck running 30 minutes each way to the disposal site at $120 per hour adds $120 to each load. A 10-cubic-metre truck carrying 8 cubic metres of clay means $15 per cubic metre in haulage alone, on top of the gate fee. Quote haulage and disposal as separate items so the client understands why transport distance affects the price.

Step 4: Benchmark against common job types

These benchmarks represent typical 2026 Australian ranges. Use them as sanity checks against your own calculated quote, not as substitutes for pricing from your actual costs.

Residential site cut

Driveway excavation

Trenching

Pool excavation

Pool excavation is typically quoted as a fixed price per job rather than per cubic metre, because the shape is complex and the depth varies. Measure the pool dimensions from the engineer's or pool builder's plans, calculate the volume (including overdig for formwork), apply the swell factor, and price the total.

Step 5: Quote rock breaking as a separate item

Rock is the single biggest margin risk in excavation. One job in clean soil generates good profit. The same job in unexpected rock can wipe out the margin and then some. Quoting rock correctly is a core skill for any excavation business.

Rock breaking rates (2026)

The rock clause

Every excavation quote should include a rock clause. The standard approach is to state that the quoted price assumes standard soil conditions, and that any rock, concrete, or other hard material encountered during the dig will be charged at a nominated rate. Common formats:

• Per-hour rock rate: "Rock encountered during excavation will be broken and removed at $[rate] per hour (ex GST) in addition to the quoted price." This suits jobs where the extent of rock is unknown.
• Per-cubic-metre rock rate: "Rock excavation charged at $[rate] per cubic metre (bank) in addition to the quoted soil rate." This suits jobs where some rock is expected but the volume is uncertain.
• Excluded entirely: "This quote assumes standard soil. Rock excavation is excluded. If rock is encountered, work will stop and a separate quote for rock removal will be provided." This is the safest for the contractor but some clients prefer a known rate upfront.

Whichever format you use, put it in writing in the quote. Verbal rock agreements lead to disputes when the invoice arrives. If you know the site has rock (from geotech reports, neighbouring builds, or your own test dig), price the rock into the base quote rather than relying on a clause.

Step 6: Price site access and mobilisation

Getting machines to site and working in restricted spaces are real costs that belong in the quote as separate line items.

Mobilisation and float costs (2026)

Restricted access considerations

Sites where a full-size excavator cannot reach the dig area require smaller machines, which are slower per cubic metre. A job that takes a 5-tonne excavator one day might take a 1.5-tonne mini three days. Quote restricted-access jobs based on the machine that fits, not the machine you would prefer to use.

Common access restrictions that affect pricing:

• Narrow side access (under 1.8m): Mini excavator only. Add 50-100% to per-cubic-metre time estimates.
• Rear yard with no side access: Machine must crane over the house or enter through the house (removing fencing, gates). Quote the reinstatement.
• Sloping site with no flat staging area: Trucks cannot park next to the dig. Material must be double-handled (dug, stockpiled, then loaded). Add 30-50% to haulage time.
• Heritage or conservation overlay: Additional council conditions, possible arborist reports, restricted machinery zones. Quote the compliance time.

Step 7: Cover compliance in every quote

Excavation carries more compliance obligations than most trades. Missing one can result in fines, stop-work orders, or liability for damage. Build these into your quoting process as standard items.

Dial Before You Dig (DBYD)

Lodging a DBYD enquiry before any mechanical excavation is a legal requirement in all Australian states. The enquiry is free and returns plans from asset owners (gas, water, electricity, telecommunications, sewer) showing their infrastructure near your dig site. You must then confirm the exact location of any services within your dig zone by potholing (hand-digging or vacuum excavation) before using machinery within the tolerance zone.

The DBYD process adds time, not material cost, to a job. Allow 2-5 business days for plan responses on a standard enquiry. Urgent enquiries are available in some states. Potholing near known services adds 1-4 hours of hand-dig or vacuum excavation, depending on the number of services.

Quote the potholing time as a line item: "Service location and potholing: $[amount], based on [number] services identified in DBYD plans." If additional services are found, charge accordingly.

Council and planning requirements

Council approval may be required for excavation depending on the depth, proximity to boundaries, and local planning overlays. Common triggers:

• Excavation deeper than 600mm within 1 metre of a boundary: Most councils require notification or an engineer's design for the shoring or retaining system.
• Excavation deeper than 1.5m: WHS regulations require a safe work method statement (SWMS), trench shoring or battering, and in some cases a geotechnical assessment.
• Flood, bushfire, or heritage overlays: Additional conditions from council, sometimes requiring specialist reports before excavation can start.
• Erosion and sediment control: Required on most development sites. Silt fences, sediment basins, and stabilised entry/exit points. The builder typically supplies these, but if you are the principal contractor, the cost is yours.

If the job requires a traffic management plan (work near or on a road), that is an additional cost of $500-2,000+ depending on the road classification and council. Quote it or note that it is the client's responsibility.

Soil contamination

If there is any possibility that the soil is contaminated (former industrial site, service station, orchard, pre-1990 residential where fill was imported), a soil assessment may be required before excavation. Contaminated soil must go to a licensed facility, and the costs jump from $50-80 per cubic metre to $150-400+ per cubic metre for disposal.

State in your quote whether the price assumes clean soil and that contaminated soil disposal is excluded. If contamination is suspected, recommend the client commission a preliminary site investigation (PSI) before you quote the excavation.

Licensing requirements by state

Excavation licensing varies across Australian states. Knowing the requirements for your state protects your business and reassures clients that you are qualified.

Across all states, the competency unit RIIMPO320F (Conduct Civil Construction Excavator Operations) is the recognised standard for excavator operators. Many clients and builders require this as a minimum before allowing you on their site. Additional units apply for specific machinery: RIIMPO318F for skid steer loaders, RIIMPO317F for wheeled front-end loaders, and RIIHAN301F for rigging (if lifting with the excavator).

High-risk work licences from SafeWork or the state WHS regulator are required for specific activities: dogging (RIIHAN301F), rigging, and crane operations. Standard excavator operation is not classified as high-risk work under the model WHS Act, but using an excavator as a crane (lifting loads with slings) may trigger additional requirements.

Regional price variation across Australia

Excavation rates vary by city and region due to labour costs, disposal distances, tip fees, soil conditions, and market competition.

Regional operators often benefit from lower disposal costs because clean fill can be placed on local properties, farms, or council projects at no charge. In metro areas, every cubic metre goes to a licensed facility with gate fees and levies. This disposal cost difference is one reason metro excavation bills run higher than regional work.

Worked example: Residential site cut in suburban Melbourne

A builder requests a quote for a residential site cut on a 450 sqm block in Melbourne's eastern suburbs. The site slopes gently from front to back. The engineer's plan calls for a 500mm average cut across the building pad (200 sqm). Standard clay soil, no rock expected. Good street access for trucks. Disposal to a licensed tip 15 km away.

The quote notes: "This price assumes standard clay soil. Rock, concrete, or contaminated material encountered during excavation will be charged at $180 per hour (ex GST) for hydraulic hammer work plus disposal at applicable rates. Contaminated soil disposal is excluded."

Disposal is 45% of this quote. That is typical for removal jobs in metro areas. If the builder can find a receiving site for clean clay within 5 km, the haulage and disposal costs drop by $6,000-8,000. Always ask the builder if they have a fill site before defaulting to tip disposal.

Seven common quoting mistakes in excavation

1. Quoting disposal on bank volume instead of loose volume. The swell factor means you truck 20-45% more material than the in-ground volume. Every cubic metre you undercount is disposal cost off your margin.
2. No rock clause. One hit of unexpected sandstone at 500mm can double the job cost. A clear rock clause in every quote protects you. Verbal agreements do not hold up when the invoice arrives.
3. Forgetting mobilisation. Floating a 6-tonne excavator to site and back costs $400-800. On a $3,000 trenching job, that is 15-25% of the price. List it or absorb it consciously.
4. Underestimating haulage time. A tip 20 km away sounds close, but a 10-tonne tipper doing a round trip in metro traffic takes 50-70 minutes including queuing and tipping. Two trips per hour is optimistic in most cities. Time each route before quoting.
5. Ignoring soil type. Clay sticks to the bucket, slows cycle times, and weighs more per cubic metre than sand. Quoting clay at sand rates loses 20-40% on cycle time alone. Walk the site, look at neighbouring excavations, and check the geotech if one exists.
6. Quoting deep trenches at shallow trench rates. A 300mm service trench is fast and simple. A 1.2m sewer trench in clay requires shoring, wider battering, and WHS-compliant entry and exit. The per-metre rate should reflect the depth, not just the length.
7. Skipping the site visit. Photos and Google Earth do not show soil conditions, overhead power lines, tree root zones, or the gradient that makes the truck access impossible from the north side. Visit every site before quoting, or add a generous contingency if quoting remotely.

How to present an excavation quote that wins work

Builders and homeowners compare excavation quotes side by side. The quote that communicates clearly and covers the scope wins more often than the cheapest number on a text message.

Structure your quote in sections

Break the quote into clear line items grouped by stage:

1. Mobilisation: Float in, float out, any setup on site.
2. Service location: DBYD potholing, time estimate.
3. Excavation: Volume, soil type, rate per m3 or hourly rate, machine(s) to be used.
4. Haulage: Number of loads, truck size, distance to tip, haulage rate.
5. Disposal: Material type, gate fee per m3 or per tonne, tip location.
6. Rock allowance: Rate per hour or per m3 if rock is encountered.
7. Compliance: Sediment control, traffic management, permits.
8. Clean-up: Final trim, levelling, site restoration.

Itemised quotes reduce disputes, make variations easy to agree on, and let the client see exactly where their money goes. A single lump-sum number invites comparison on price alone. An itemised breakdown competes on transparency and scope.

Include a site sketch

A simple annotated photo or sketch showing the dig area, depths, truck access path, and stockpile location takes five minutes and dramatically increases conversion. The client can see that you understand their site, and it becomes the reference point for any scope changes during the job.

State what is excluded

Be explicit about what the quote does not cover: rock, contamination, additional excavation beyond the stated volume, reinstatement of damaged surfaces, tree removal, retaining walls, and work outside the marked dig area. Exclusions protect you. Ambiguity costs you.

Send it quickly

The first detailed quote to arrive often wins. Send within 24-48 hours of the site visit. If you need more time to confirm disposal rates, send the quote with the disposal line marked as "estimate, to be confirmed" and follow up with the final number within the week.

FlowSpec lets you speak your line items on site immediately after the inspection and sends the priced quote to Xero, ready for the client. Quoting while the site details are fresh in your mind produces more accurate quotes and faster turnaround than writing them up in the office days later.

Hourly vs per-cubic-metre: which pricing method suits which job

Excavation contractors switch between hourly and per-cubic-metre pricing depending on the job. Choosing the wrong method for the job type is a common margin leak.

Some contractors offer the client a choice: a fixed per-cubic-metre price (slightly higher margin, absorbs risk) or an hourly rate (lower if the job is straightforward, higher if problems arise). Giving the client the option builds trust and lets them choose their own risk preference.