Why misreading the environmental budget costs money at completion
When a small Korean contractor wins a public works contract, the expense lines of the breakdown list the occupational safety and health budget, the quality-control cost, the environmental conservation cost and the waste disposal cost side by side.
Because the names look alike, contractors often hesitate over where dust nets, wheel-wash bays or temporary fences belong, and the same item ends up in two lines or in none.
The risk is that the indirect portion of the environmental conservation cost is settled by actual spending, so unsupported amounts are deducted at completion and overspending is not reimbursed automatically.
This construction environmental budget calculator applies the minimum rates by work type in Annex 8 of the Enforcement Rule of the Construction Technology Promotion Act to find the minimum indirect amount and checks whether the contract allocation falls short.
It separates the four direct facility groups, the indirect amount and the waste disposal cost into a total environmental management budget, and collects separately procured waste duplicates, double counting in other lines and main-purpose reclassification in one review.
Finally, it sorts indirect spending into confirmed, unconfirmed and rejected and shows the settlement reduction and overrun ranges.
ScopeThis calculator is based on Korean rules checked on 2026-10-25 through the National Law Information OPEN API of the Ministry of Government Legislation.
It accepts reference dates from 2026-01-01 to 2026-12-31, and Annex 8 has not changed since its 2021-08-27 amendment.
The result is an arithmetic cross-check, not a client settlement approval, contract change or price adjustment decision.
Environmental management cost = conservation cost + waste disposal cost
Article 66(3) of the Construction Technology Promotion Act obliges the client to include in the contract price the environmental management cost needed to prevent environmental damage and pollution.
Rule Article 61(1) defines that cost as the cost of installing and running pollution-control facilities on site plus the cost of treating and recycling site waste, and Article 3 of the MOLIT guideline calls the first part the environmental conservation cost and the second the waste disposal cost.
Direct conservation cost
Depreciation, utility charges, materials and labor for installing, operating and removing control facilities.
It sits in direct expenses and is priced with market unit prices, standard estimates or quotes.
Indirect conservation cost
Testing, inspections, education and training, permits, notice signs and preparing the use plan.
It must be at least direct cost × the minimum rate and is settled by actual spending.
Waste disposal cost
On-site sorting, transport and loading, collection, storage, intermediate and final treatment by licensed firms, and on-site recycling.
Article 38 of the government pricing rule places it in direct expenses.
Article 39(2) of the contract pricing rule lists the occupational safety and health budget (item 7) and the environmental conservation cost (item 8) as separate indirect cost lines.
The two lines have different legal bases, rates and settlement methods, so one item must never be priced in both.
Minimum indirect environmental rates by work type (Rule Annex 8)
Annex 8 item 1(a) requires the indirect environmental amount to be at least the direct construction cost multiplied by the minimum rates below.
Annex 3 of MOLIT notice 2018-528 carries the same table.
The last column shows the minimum amount for a direct construction cost of KRW 3 billion.
Rule Annex 8 minimum indirect environmental rates by work type with a KRW 3 billion direct cost example| Group | Work type | Minimum rate | Minimum at KRW 3 billion direct cost (KRW) |
|---|
| Civil | Road | 0.9% | 27,000,000 |
| Civil | Plant | 0.4% | 12,000,000 |
| Civil | Subway | 0.5% | 15,000,000 |
| Civil | Railway | 1.5% | 45,000,000 |
| Civil | Water supply and sewerage | 0.5% | 15,000,000 |
| Civil | Harbor (with a silt curtain or dredged-soil barrier) | 0.8% (1.8%) | 24,000,000 (54,000,000) |
| Civil | Dam | 1.1% | 33,000,000 |
| Civil | Housing-site development | 0.6% | 18,000,000 |
| Civil | Other civil works | 0.8% | 24,000,000 |
| Building | Housing (redevelopment and reconstruction) | 0.7% | 21,000,000 |
| Building | Housing (new build) | 0.3% | 9,000,000 |
| Building | Other building works | 0.5% | 15,000,000 |
Reading the rate table
- The rate is an “at least” floor, so the calculator rounds sub-won fractions up
- With two work types on one site, the type with the larger work amount applies (Guideline Article 6(3))
- Separately procured contracts are calculated one by one with their own work types
- Harbor works use 1.8% when a silt curtain or dredged-soil barrier is installed
- There is no fixed minimum amount, and the direct portion follows its unit-price build-up
The four pollution-control facility groups in direct costs
Annex 8 item 1(b) and Guideline Article 5(1) divide on-site pollution-control facilities into four groups and name the environmental law each group serves.
The calculator’s four direct inputs follow this split, so divide lump-sum items in the breakdown along these lines.
Dust control
Wheel-wash facilities (including paving and sediment storage), sprinklers and water trucks, dust covers (including cut and fill slopes), dust walls, nets and screens, vacuum cleaners, dust collectors and mechanical sweepers.
They serve the Clean Air Conservation Act.
Noise and vibration control
Noise barriers (including moving and installation), sound sheets, silencers, noise covers and tunnels, noise forests and berms, sound absorbers, elastic supports, vibration dampers and trenches, rubber mounts and pipe isolators.
They serve the Noise and Vibration Control Act.
Waste facilities
Incinerators, chutes, scrap bins, waste storage with covers and drains, and construction-waste plants including crushing and dewatering.
These are facility costs and differ from the outsourced waste disposal cost.
Water pollution control
Wastewater treatment (including automatic monitoring), temporary drains and ditches, plastic covers on slopes, settling and coagulation facilities, silt curtains, oil booms, emulsifiers and absorbent pads, septic tanks and portable toilets with tanks.
They serve the water environment, groundwater, sewerage and chemical control laws.
Depreciation formula (Guideline Annex 2)
Depreciation = (depreciation rate + repair rate) × equipment price × operating hours ÷ (standard annual operating hours × service life)
Unless the standard estimates set otherwise, standard annual operating hours are 1,000, and service life is 5 years for machinery and 3 years for glass and metal items.
Utility charges follow government-announced rates, materials follow certified price surveys and labor follows the wage rates published by the construction and engineering associations.
Settling the indirect environmental amount by actual spending
Rule Article 61(2) settles the indirect portion of costs confirmed by the client or the construction manager according to actual spending.
Guideline Article 10(2) requires the contractor to have the quantities and costs of indirect spending confirmed at progress or completion inspection, so unsupported amounts drop out of the recognized total.
Settlement reduction range
Minimum reduction = max(0, contract − confirmed − unconfirmed)
Maximum reduction = max(0, contract − confirmed)
If every unconfirmed item is accepted you get the minimum, and if none is you get the maximum.
Rejected amounts are excluded from the start.
Overrun range
Overrun = max(0, recognized spending − contract amount)
The overrun is not paid automatically at settlement.
Under Guideline Article 9 the contractor requests an addition after consultation, and the client fixes it by contract change.
Urgent facilities need client approval first
The proviso to Guideline Article 6(2) lets urgent pollution-control facilities be settled from the indirect amount when the client accepts the need, for example to prevent imminent environmental damage.
Without an approval letter or minutes the cost may be rejected at settlement, so the calculator keeps this line separate and flags it.
Separate waste costs and the 100-tonne separate procurement rule
Annex 8 item 2 defines the waste treatment and recycling cost as on-site sorting, transport and loading, collection, storage, intermediate and final treatment by licensed firms, and on-site recycling, estimated from surveys of structures to be demolished or from design documents.
Item 2(c) states that when disposal is procured separately under Article 15 of the Construction Waste Recycling Act, that disposal cost is excluded from the works environmental budget.
Duty to procure construction-waste disposal separately by client type and outsourced tonnage| Client | Outsourced construction waste | Separate procurement | Basis |
|---|
| State, local government, public institutions, local public enterprises | 100 t or more | Required | Act Article 15(1), Decree Article 11 |
| State, local government, public institutions, local public enterprises | Under 100 t | Not required | Decree Article 11 |
| Private client | Any amount | No statutory duty (check the contract) | Outside Article 15(1) |
| Any client | Under 5 t | Outside the definition; check the class | Act Article 2(1) |
If disposal is procured separately but the works contract still prices construction-waste disposal, the same tonnage is paid twice.
When separate procurement is “Yes”, the calculator shows the whole construction-waste disposal amount in the works contract as a duplicate, and when a public client has 100 tonnes or more but the answer is “No”, it warns that separation is missing.
Designated waste such as asbestos and business waste are outside separate procurement, so they have their own input.
Telling it apart from the safety and health budget and quality cost
Most disputes arise when one item serves both environmental and safety purposes.
Guideline Article 5(2) says that even an item on the pollution-control list belongs to the line matching its main purpose when that purpose is site operation, smooth progress or worker safety and health.
Comparison of the environmental conservation cost, waste disposal cost, safety and health budget and quality-control cost| Cost line | Legal basis | Allocation | Settlement |
|---|
| Environmental conservation | Construction Technology Promotion Act Article 66, Rule Article 61 and Annex 8 | Direct unit prices + indirect at least direct cost × the Annex 8 minimum rate | Indirect portion by actual spending |
| Waste disposal | Annex 8 item 2, Construction Waste Recycling Act Article 15 | Tonnage × treatment price, excluded if procured separately | Contract change when quantities move |
| Occupational safety and health budget | Occupational Safety and Health Act, Ministry of Employment and Labor notice | Base amount × rate by work type | Spending review with item caps |
| Quality control | Construction Technology Promotion Rule Annex 6 | Testing and inspection costs | Settled by test records |
Common boundary cases
- Decide the main purpose first: a fall-protection net belongs to the safety budget, while a dust net that blocks fugitive dust belongs to the environmental cost
- A temporary fence for access control usually serves site operation and is often a temporary-works item
- Toilets for worker hygiene and portable toilets with tanks for water-pollution control are told apart by the purpose written in the design
- Check from the report type whether a measurement fee is a quality test or an environmental measurement
Two fictional examples of the calculation
The example buttons load the two fictional projects below.
They are not figures from real design documents and only show how the calculation flows.
Environmental budget results for the fictional public welfare center and road plus sewer composite examples| Item | Welfare center (0.5%) | Road + sewer (0.9%) |
|---|
| Direct construction cost | 3,200,000,000 | 2,900,000,000 |
| Minimum indirect amount | 16,000,000 | 26,100,000 |
| Contract indirect amount / shortfall | 14,500,000 / 1,500,000 | 26,100,000 / 0 |
| Four direct groups | 36,000,000 | 71,000,000 |
| Waste disposal total | 7,700,000 | 47,000,000 |
| Environmental management total | 58,200,000 | 144,100,000 |
| Duplicates and reclassification | 1,800,000 | 41,000,000 |
| Indirect settlement reduction range | 3,700,000 ~ 6,800,000 | 0 ~ 8,500,000 |
| Overrun range / addition candidate | 0 / 0 | 0 ~ 3,500,000 / 8,500,000 |
What the welfare center shows
Other building works at 0.5% of KRW 3.2 billion gives a minimum of KRW 16,000,000, but the contract has KRW 14,500,000, so KRW 1,500,000 is short.
Confirmed spending of KRW 7,700,000 plus KRW 3,100,000 unconfirmed leaves a reduction between KRW 3,700,000 and KRW 6,800,000.
What the composite works show
Road works of KRW 4.0 billion outweigh sewer works of KRW 0.9 billion, so road 0.9% applies and the KRW 26,100,000 minimum matches the contract.
The works contract still prices KRW 38,000,000 of disposal on top of the separately procured 650-tonne service, so the duplicate grows, and the use plan was submitted 5 days after the first facility was installed.
Use plan submission, revisions and additions
Many environmental budget disputes start with procedure rather than amounts.
Rule Article 61(2) and Guideline Article 8 require the use plan to reach the client before the first pollution-control facility is installed, and a revised plan before any change is carried out.
- Right after starting, prepare the use (revision) plan (Form 1) and the detailed use plan (Form 2) and submit them before the first facility is installed
- Attach unit-price and quantity sheets for lump-sum items under Guideline Article 6(4)
- When facilities are added, lump sums change or waste rises, submit a revised plan before carrying it out and discuss an addition with the client and construction manager
- At progress or completion inspection, have indirect quantities and costs confirmed and keep photos, test reports and tax invoices together
- Put the reduction and overrun ranges into the review and use it for reduction talks or a contract-change request
Step-by-step use and practical scenarios
- Choose the reference date, client type and work type, and for composite works add work type 2 and both work amounts
- Enter the direct construction cost, the four direct groups, the indirect amount and the three waste lines from the cost statement
- Add the outsourced tonnage, the separate procurement answer and any reclassified or double-counted amounts
- Enter the seven indirect spending rows with their status and compare the plan submission and first installation dates
- Save or print the TXT review and send it with the checklist to the client and construction manager
Reviewing the breakdown after award
If the indirect amount is below the minimum rate, asking for a cost-statement check early in the works is far easier than just before completion.
The rate moves from 0.3% to 1.5% with the work type, so confirm the work type basis in the design as well.
Checking evidence before completion
The more unconfirmed spending you have, the wider the reduction range.
Collecting test reports, training logs, permit receipts and sign photos by line to turn unconfirmed items into confirmed ones is the surest way to reduce deductions.
Tips and cautions
- Enter amounts excluding VAT so they match the cost statement
- Follow the client’s cost statement on whether owner-supplied materials are in direct cost
- Environmental costs spent in subcontracted work are easier to confirm when they are reflected in the main contractor’s plan and settlement evidence
- Use the memo for the design document, date and officer; amounts and memos are not sent as analytics events
Frequently asked questions
Are the environmental conservation cost and the environmental management cost the same thing?
No.
The environmental management cost in Article 66(3) of the Construction Technology Promotion Act is the umbrella term, and Article 3 of the MOLIT guideline splits it into the environmental conservation cost and the waste disposal cost.
Conservation covers installing and running dust, noise and vibration, waste-facility and water-pollution controls.
Waste disposal covers on-site sorting, transport, outsourced treatment and recycling.
Check the two amounts separately in the contract breakdown.
What is the minimum indirect rate multiplied by?
Rule Annex 8 requires the environmental amount in indirect costs to be at least the direct construction cost multiplied by the minimum rate for the work type.
Direct construction cost is materials plus direct labor plus direct expenses in the cost statement.
Multiplying the total project cost or the contract price overstates the minimum, so enter the direct construction cost from the client’s cost statement.
Is there a minimum for the direct portion of the environmental cost?
There is no fixed minimum.
Guideline Article 6(2) has the direct portion built from depreciation, utility charges, materials and labor for installing, operating and removing facilities, priced with market unit prices, standard estimates or quotes.
The calculator therefore shows the direct portion only as a total and a share, and applies the minimum test only to the indirect portion.
What happens if the indirect environmental amount is not fully spent?
Rule Article 61(2) settles the indirect portion of costs confirmed by the client or the construction manager according to actual spending.
If confirmed spending is below the contract amount, the difference can be deducted at progress or completion settlement.
The calculator keeps unconfirmed spending as a range and shows the minimum and maximum reduction.
If spending exceeds the contract amount, is the difference paid?
Not automatically.
Annex 8 item 3 and Guideline Article 9 allow the contractor to request an addition after consulting the client and the construction manager when facilities are added, lump-sum contents change or waste quantities rise.
The amount changes only after the client confirms it and makes a contract change, so use the overrun range only as support for that request.
Is a dust net or a temporary fence an environmental cost or a safety cost?
Guideline Article 5(2) says that even an item on the pollution-control list belongs to the line matching its main purpose when that purpose is site operation, smooth progress of the works or worker safety and health.
Putting the same item in both the safety and health budget and the environmental cost is double counting.
Confirm the main purpose and the design item and keep it in one line only.
Must private projects procure construction-waste disposal separately?
The separation duty in Article 15(1) of the Construction Waste Recycling Act applies to the state, local governments and the bodies listed in Article 2(15), such as public institutions, local public enterprises and private-investment concessionaires.
Decree Article 11 sets the threshold at 100 tonnes or more of construction waste sent for outside disposal.
Private clients have no statutory duty, but a contract may still require separation, so check the contract.
Can I submit the result as my settlement claim?
The result is an arithmetic cross-check of the amounts you entered.
It does not judge direct unit prices, whether facilities are legally required, whether the client will accept the spending, contract-change approval or special contract terms.
Send the review with the use plan, the detailed plan and the unit-price sheets, and get confirmation from the client and the construction manager.
Official sources, update policy and next steps
Statutes and administrative rules were searched and their articles and annex texts checked directly through the National Law Information OPEN API.
The Construction Technology Promotion Act MST276921 (effective 2025-10-01), its Decree MST286847 (effective 2026-06-09) and its Enforcement Rule MST286885 (effective 2026-06-11) are all current, and Annex 8 is the 2021-08-27 amendment.
The guideline is MOLIT notice 2018-528 (effective 2019-01-01, administrative rule serial 2100000149175), and the Construction Waste Recycling Act MST276695 and its Decree MST278497 are the versions effective 2025-10-01.
Rates and thresholds are rechecked immediately when Annex 8, the guideline (reviewed every three years) or the waste decree changes, and otherwise once a year.
Special contract terms and agency guidance may prevail for an individual project, so confirm the latest basis with the client before filing a settlement claim.
Enter your contract breakdown now to find indirect shortfalls and double counting, and save the review for settlement and addition discussions.