Split Payment under Brazil’s Tax Reform: Impacts on Public Works, Measurements, and BDI

Understand how IBS and CBS split payment affects public works, measurements, cash flow, tax credits, financial expenses, and BDI during the tax transition.

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Split payment under Brazil’s Tax Reform is a collection mechanism in which IBS and CBS amounts may be segregated at the time of financial settlement of the transaction, before the full amount reaches the supplier. For public works, the effect should not be analyzed only as a tax matter: it changes the relationship among measurement, invoicing, cash actually received, appropriation of tax credits, financial expenses, and BDI formation.

In September 2026, however, it is essential to distinguish the definitive legal architecture from the actual stage of implementation. Complementary Law No. 214/2025, as amended by Complementary Law No. 227/2026, regulates split payment in Articles 31 to 35 and provides for gradual implementation. The year 2026 remains a test year for IBS and CBS. In addition, the special allocation regime for government purchases provided for in Article 473 does not apply in full to taxable events occurring in 2026. Therefore, estimates, tender documents, and contracts need to record the reference year and avoid treating as currently effective an operating mechanism still subject to implementation and joint regulatory acts.

What is split payment under Brazil’s Tax Reform?

Split payment affects the financial mechanics of measurements and BDI, but it needs to be addressed within the complete planning, evaluation, and execution lifecycle. See What the TCU Reviews in Construction and Engineering Services Procurement.

Split payment is a method for settling IBS and CBS liabilities in which the portion corresponding to the taxes is segregated during financial settlement. Under the standard procedure, the payment transaction is linked to the fiscally documented operation, and the system checks the IBS and CBS amounts that still need to be settled before releasing funds to the supplier.

The economic logic differs from a system in which the supplier receives the gross amount and pays the tax later.

In simplified terms:

1. the transaction involving goods or services occurs;
2. the tax document identifies IBS and CBS;
3. payment is initiated;
4. the system checks the tax portion still due;
5. the applicable portion is segregated and collected;
6. the supplier receives the corresponding net amount;
7. any excess amounts follow the statutory refund or transfer procedures.

The mechanism seeks to bring tax collection closer to the financial moment of the transaction, reducing mismatches between declared liability and tax actually paid.

Why split payment matters to Cost Engineering

An estimate worksheet does not deal only with physical cost. It also needs to represent taxes, financial expenses, working capital, payment timing, and contracting conditions.

When part of the amount no longer passes through the contractor’s cash account, the relationship between invoiced price and available funds changes.

Consider a hypothetical measurement of BRL 1,000,000. Under a model without segregation, the company may receive the contract amount and pay taxes according to the applicable system. Under a split-payment model, the tax portion may be separated within the financial flow. The gross measurement remains a contractual figure, but the funds actually available for payroll, suppliers, equipment, and working capital may be lower.

This difference affects:

• working-capital requirements;
• disbursement schedule;
• financial expenses;
• reconciliation between measurement and receipt;
• project cash flow;
• interpretation of tax credits;
• BDI composition;
• bid pricing;
• analysis of economic-financial equilibrium during the transition.

For this reason, Tax Reform should be incorporated into Cost Engineering for Construction and Engineering Services as an estimating variable, not merely as an invoicing issue.

2026 is a test year: what is actually in force

Brazil’s Federal Revenue Service characterizes 2026 as a test year for CBS and IBS. The transitional system provides for disclosure of the new taxes and adaptation of documents and systems, but this does not mean that all economic consequences of the definitive model are already fully implemented.

Complementary Law No. 214/2025 provides for gradual implementation of split payment. Article 35 establishes that a joint act of the IBS Management Committee and the Federal Revenue Service will govern this implementation and may provide for optional arrangements.

Government purchases have another transition rule. The regime for full allocation of tax revenue to the contracting federative entity, associated with Article 473 of Complementary Law No. 214/2025 and regulated by Decree No. 12,955/2026, does not apply to taxable events occurring from January 1 through December 31, 2026.

This creates an important technical rule for any estimate prepared today: do not use the final 2033 design as though it were already the financial mechanism in force in September 2026.

The tax calendar needs to appear in the estimate memorandum

Public works often span several fiscal years. A procurement launched in 2026 may have significant execution in 2027, 2028, 2029, or later.

The estimate needs to state the base date and the scenario considered.

Period	Recommended interpretation for the estimate
2026	test year; adaptation of documents, systems, and assumptions
2027–2028	progression of CBS and IBS during the transition, with phaseout of PIS/Cofins
2029–2032	progressive transition from ICMS and ISS to IBS
2033	full effectiveness of the new consumption-tax model
split-payment implementation	depends on regulation and the gradual implementation provided by law

This time matrix is particularly important in multi-year contracts.

Government procurement has its own rules

Brazil’s Tax Reform created specific treatment for acquisitions made by direct public administration bodies, public agencies, and public foundations.

Article 473 of Complementary Law No. 214/2025 establishes that, under the applicable regime, IBS and CBS revenue will be allocated in full to the contracting federative entity through adjustments to the rates due to the other entities.

This rule should not be confused with a simple tax exemption for the project.

The tax remains part of the fiscal architecture. What changes is the allocation of the revenue under the statutory design.

For the cost engineer, this means that classification of the purchaser is an essential assumption. A tax-burden simulation prepared for a private client should not be automatically applied to a contract with the Public Administration.

The taxable event for government purchases may occur upon payment

Complementary Law No. 214/2025 establishes a specific rule for acquisitions by direct public administration bodies, public agencies, and public foundations subject to Article 473: in these cases, the taxable event occurs when payment is made.

This rule brings the tax event closer to the financial flow of public procurement.

In construction contracts, measurement, certification, issuance of the tax document, settlement of the expenditure, and payment cease to be merely administrative stages. They also acquire direct tax relevance.

Inconsistent measurement documentation may affect:

• invoiced amount;
• identification of the taxable event;
• tax segregation;
• recognition of credits;
• financial reconciliation;
• project-level traceability.

Technical Support for Inspection of Construction and Engineering Contracts therefore needs to integrate engineering, measurement, and tax documentation without replacing the responsibility of the tax function.

Gross measurement and net cash are not the same amount

This distinction is the economic core of the issue.

Measurement determines the contract value of the service performed and accepted according to the contract criteria.

Net cash represents the funds that actually reach the company after applicable payment mechanisms, withholdings, and segregations.

The estimate needs to work with both amounts.

A company may have:

• recognized contract revenue;
• approved measurement;
• issued tax document;
• segregated tax;
• net amount lower than the measured amount;
• a need to pay suppliers before receiving credits or refunds.

This difference may increase working-capital requirements even without changing the nominal measurement value.

Split payment may change the financial-expense component of BDI

The financial-expense component of BDI represents the effect of the time between disbursement and receipt, according to the methodology adopted.

If net cash flow changes, the financing cost may also change.

The analysis should consider:

1. when the contractor pays labor and suppliers;
2. when the measurement period closes;
3. when the tax document is issued;
4. when the agency settles the expenditure;
5. when payment occurs;
6. which portion is segregated;
7. when credits may be appropriated;
8. whether there is a credit balance;
9. when any refund becomes available.

The mere existence of a tax credit does not mean that cash is available on the same day.

Tax credits and working capital are different concepts

The non-cumulative system allows credits to be appropriated in the cases provided by law.

A tax credit, however, is not synonymous with cash.

A project may accumulate credits and at the same time experience financial pressure to pay payroll, equipment, and suppliers.

For this reason, the model should separate:

• tax liability;
• credit eligible for appropriation;
• credit actually used;
• credit balance;
• refund period;
• operating cash.

The error is to calculate only the final tax burden and ignore the financial path required to reach that result.

Construction for the Public Administration has a specific credit rule

Decree No. 12,955/2026 limits, for certain construction services supplied to parties outside the regular regime, the CBS credit related to materials to the amount of the liability arising from the service itself.

However, paragraph 2 of Article 365 removes this limitation when the construction service is provided to direct public administration bodies, public agencies, and public foundations.

This point is material for public works.

It does not mean that every credit from every transaction will automatically be converted into cash. It means that the specific material-credit limitation addressed in that provision does not apply to services for these entities.

The economic analysis still needs to verify classification, documentation, appropriation, and operation.

Tax Reform increases the importance of project-level cost centers

The new model requires greater integration between tax documentation and cost accounting.

Even when a particular credit limitation does not apply to public works, traceability remains essential.

Each project should make it possible to relate:

• supplier invoice;
• purchase order;
• estimate item;
• cost center;
• measurement;
• contract;
• tax document issued to the public agency;
• appropriated credits;
• payment received.

This structure turns the project into a verifiable unit of engineering economics.

The ABC Curve should guide credit analysis

Tax modeling does not need to begin with thousands of low-materiality items.

The ABC Curve of Construction Inputs makes it possible to prioritize the materials, equipment, and subcontracting packages that concentrate value.

For each relevant item, the team can verify:

• nature of the input;
• tax incidence;
• credit eligibility;
• time of appropriation;
• supplier;
• payment method;
• weight in total cost.

The objective is not to turn the engineer into an accountant. It is to provide enough data for the tax assumption in the estimate to be technically demonstrable.

BDI needs to move beyond a single tax-rate logic

Tax Reform in Construction already requires a distinction between nominal rate and effective burden.

Split payment adds a cash-flow layer.

Even when the final tax impact is neutral or reduced, the timing of collection may change the cash position.

Therefore, post-reform BDI should jointly analyze:

• taxes;
• credits;
• financial expenses;
• head-office overhead;
• insurance and guarantees;
• risk;
• profit;
• specific characteristics of the construction regime.

A formula that merely replaces ISS, PIS, and Cofins with IBS and CBS misses this interaction.

How to avoid double counting in BDI

A tax change may be recorded simultaneously in more than one part of the worksheet if governance is absent.

Example of duplication:

• reduction of the effective burden recognized in the tax component;
• maintenance of the same gross direct cost without adjusting for credits;
• increase in financial expense without demonstrating the new cash flow;
• generic contingency for Tax Reform.

The estimate should explain where each effect was treated.

Effect	Direct cost	BDI taxes	Financial expense	Contingency
recoverable credit	review where applicable	do not duplicate	consider timing	no
split payment	not an input	reflect according to methodology	assess cash flow	residual risk only
tax-rate change	normally no	yes	indirect effect	no
implementation delay	no	scenario-based assumption	cash-flow scenario	if treated as risk, justify

Split payment is not a deduction from measurement

The portion segregated for IBS and CBS should not be confused with a technical disallowance.

A disallowance results from unaccepted service, unproven quantities, nonconformity, or another contractual condition.

Split payment results from the tax system.

Mixing both into a single deductions field makes reconciliation more difficult.

The measurement worksheet should maintain separate fields for gross measured amount, disallowances, contractual withholdings, disclosed taxes, tax segregations, and net financial amount.

The Terms of Reference should anticipate the payment logic

The Terms of Reference for a multi-year procurement begun during the transition should avoid tax clauses frozen to a single scenario.

The wording should establish:

• base date of the estimate;
• legislation used;
• responsibility for issuance of tax documents;
• documents required for financial settlement;
• treatment of tax changes;
• relationship with price adjustment and revision;
• how financial impact must be demonstrated when rebalancing is requested;
• obligation to retain documents required for reconciliation.

Technical Planning for Engineering Procurement can structure these interfaces before the tender is published.

A tax clause should not promise what depends on future regulation

In September 2026, gradual implementation is still underway.

Therefore, clauses that describe future operating procedures as definitive may become obsolete.

A more robust approach is to:

1. identify the governing legislation;
2. define documentary responsibilities;
3. link procedures to the regulatory acts in force at the time of the transaction;
4. provide for updates to routines without improperly altering the economic equation;
5. preserve the possibility of rebalancing analysis in the cases provided by law.

The contract should be stable in its principles and adaptable in its procedures.

A tax change may lead to revision, but not automatically

Law No. 14,133/2021 protects the economic-financial equation.

This does not mean that every rule change generates an additional payment.

An analysis needs to demonstrate which legislation applied on the bid date, what change occurred, when it became effective, which portion of the contract was affected, whether there was an actual increase or decrease, whether credits offset the effect, and what the demonstrated net amount is.

Economic-Financial Rebalancing in Engineering Contracts should work with net impact, not merely a nominal rate change.

Price adjustment and tax changes are not the same thing

Price adjustment updates prices using an index.

A tax change may require revision of the economic equation when the legal requirements are met.

Mixing the two may create double recovery, improper denial of revision, payment above the actual impact, or audit difficulties.

The memorandum should separate each mechanism.

Multi-year projects need cash-flow scenarios

A four-year construction estimate should project more than one tax scenario when the transition is material.

Scenario	Assumption
A	rules effective on the 2026 base date
B	significant execution in 2027–2028
C	the contract spans the start of the ISS/ICMS transition in 2029
D	operational implementation of split payment changes cash flow
E	regulatory delay preserves the previous system for longer

The scenario should not become guesswork. Its purpose is to identify sensitivity.

How to model project cash flow

A minimum model starts from the physical-financial schedule.

For each period, record planned direct cost, payroll and supplier payments, taxes on acquisitions, credits, measurement, invoicing, payment term, segregated taxes, net cash, accumulated balance, and financing requirement.

This projection shows whether the tax model changes working-capital requirements.

Conceptual measurement example

Consider a hypothetical gross measurement of BRL 2,000,000.

The analysis should not assume a universal split-payment percentage.

Instead, the model uses the rule applicable to the period and taxpayer.

The flow can be represented as:

Gross measurement → technical adjustments → invoiced amount → applicable IBS/CBS → financial segregation → net amount received

Then, in a separate layer:

Acquisition credits → offset/assessment → tax balance → possible refund

This avoids mixing output taxation with supply-chain credits.

The risk of using a fixed split-payment percentage

The standard procedure under Complementary Law No. 214/2025 considers the liabilities actually arising and the portions already settled.

The law also provides for an optional simplified procedure with predetermined percentages, subject to regulation.

Therefore, using a universal fixed rate in the estimate may create false precision.

The memorandum should state whether it models the standard procedure, simplified procedure, sensitivity scenario, nominal value, or effective burden.

Split payment and project suppliers

The effect does not occur only in the contractor–public agency relationship.

The supply chain may also be subject to the new mechanisms.

This changes credit formation.

A contractor that purchases materials and subcontracts services needs to track liabilities from its own operations, credits generated by acquisitions, tax documentation, and the connection between transactions and payments.

Subcontracting and outsourcing require economic analysis, not automatic conclusions

The new VAT system increases the relevance of credits and may change the comparison between in-house labor and third-party contracting.

This does not mean outsourcing will always be better.

The decision depends on net cost, productivity, quality, risk, capacity, schedule, credits, professional responsibility, and contractual interfaces.

Event-based measurement and split payment

Contracts using event schedules or payment milestones concentrate invoicing at specific moments.

If tax segregation occurs at these milestones, cash flow may become more volatile than under uniform monthly measurements.

A BRL 10 million milestone may create a substantial cash requirement before payment even if the project is economically balanced overall.

Provisional and final acceptance also affect cash flow

When part of the price is reserved for provisional or final acceptance, the contractor carries cost for longer.

Split payment does not eliminate this effect.

Financial expenses should consider the actual disbursement and receipt calendar.

How to document the use of credits in the estimate

The memorandum does not need to reproduce full tax bookkeeping.

It should, however, demonstrate the assumptions that change the price.

Cost group	Value	Potential credit	Assumption	Source
materials A	BRL …	BRL …	regular regime	supplier/quotation
equipment	BRL …	BRL …	according to transaction	research
subcontracting	BRL …	BRL …	according to document	proposal
in-house labor	BRL …	not treated as an equivalent credit-generating acquisition	payroll	memorandum

The role of CIB and project identification

The new tax system reinforces identification of the development in certain real-estate and construction transactions.

For Cost Engineering, the impact is organizational: purchases and documents need to be linked to the correct project.

Good registration reduces lost credits, costs assigned to the wrong contract, discrepancies between tax and engineering records, and difficulty reconciling estimate and execution.

Split payment and the Public Administration’s base estimate

The public estimate should represent market conditions.

It cannot assume the particular tax structure of a specific company.

At the same time, completely ignoring the new mechanisms produces an outdated reference.

The solution is to use transparent assumptions: tax profile considered, year, transaction regime, treatment of credits, cash-flow approach, BDI methodology, and sensitivity.

The bidder’s proposal and the Public Administration’s estimate are different layers

The company forms its bid based on its own reality.

The public agency estimates the market using a reference assumption.

These two layers may differ without either being wrong.

Control should verify whether the bid is feasible and compatible with the tender, not require all bidders to have exactly the same tax position.

How to address the issue in feasibility analysis

A bid should not be considered unfeasible merely because it uses an effective tax burden different from the estimate assumption.

The analysis needs to verify the justification.

The bidder may have different credit structures, input compositions, regimes, and supply chains.

Changes during execution require a baseline

If the contractor claims an impact from split payment, the Public Administration needs to reconstruct the tax baseline of the bid.

The baseline should include the legislation applicable to the bid, tax composition, expected effective burden, credits considered, cash flow, financial expenses, and BDI.

It is then compared with the subsequent situation.

A technical opinion should separate tax causes from operational causes

Not every cash shortage during the transition results from split payment.

There may be measurement delays, payment delays, lower productivity, advance purchases, excessive mobilization, scope increases, or supplier default.

The opinion needs to isolate causation.

Claim Management is useful for reconstructing cause, effect, chronology, and quantum.

What should be included in the administrative record

For a significant procurement, the record may include a memorandum of tax assumptions, version of the legislation consulted, access date, transition scenario, cash-flow simulation, treatment in BDI, credit rationale, risk assessment, payment clauses, update procedure, and a technical opinion when there is a material change.

Eight modeling errors to avoid

1. treating split payment as a simple fixed-percentage withholding;
2. stating that the entire definitive system is already in force in 2026;
3. confusing measured value with cash received;
4. ignoring credits;
5. treating a credit as instant cash;
6. changing the tax component of BDI while ignoring financial expenses;
7. applying a private-client simulation to public works;
8. requesting rebalancing based only on the nominal rate.

How to structure the Terms of Reference

The Terms of Reference should not function as a tax manual.

They should define issuance of tax documents, linkage to measurement, information required for financial settlement, responsibility for registration updates, compliance with current legislation, effects of tax changes, evidence of impact for rebalancing requests, and document retention.

Technical Review of Terms of Reference for Construction and Engineering Services helps verify whether the clause is executable and consistent with the rest of the contract.

How to procure an analysis of Tax Reform impacts on the estimate

The engagement should have a defined product.

It is not enough to request consulting on Tax Reform.

The engineering scope may be formulated as analysis of the impacts of IBS/CBS and financial flow on the project estimate, BDI, measurement, and schedule.

Required inputs

• base estimate;
• ABC Curve;
• schedule;
• delivery model;
• draft Terms of Reference and contract;
• current tax assumptions;
• measurement structure;
• data from relevant suppliers;
• base date.

Deliverables

• tax-assumption matrix;
• transition scenario;
• effective-burden memorandum;
• credit simulation;
• cash flow;
• BDI review;
• recommendations for clauses;
• tax-risk matrix;
• update criteria.

Acceptance criterion

The product should allow another professional to reproduce the reasoning and identify the source of each assumption.

When specialized support is most relevant

The need increases in multi-year projects, high-value contracts, projects with a high material content, extensive subcontracting, tight financial margins, milestone-based payment structures, contracts spanning different transition phases, projects with BDI calculated before 2026, and ongoing equilibrium reviews.

In these situations, combining Cost Engineering with specialized tax advisory support reduces the risk of treating a fiscal issue as a simple worksheet adjustment.

How A3A Engenharia can support

A3A Engenharia operates on the technical layer of the issue: estimate, BDI, schedule, measurement, risk matrix, procurement documentation, and economic-impact analysis.

This work does not replace legal or tax advice.

The engineering product is the memorandum that connects the rule to the project.

Checklist for an estimate prepared for split payment

• base date declared;
• legislation versioned;
• execution year mapped;
• implementation scenario identified;
• government-purchase regime verified;
• credits analyzed;
• ABC Curve used;
• cash flow projected;
• financial expense reviewed;
• BDI reconciled;
• measurement clauses compatible;
• tax baseline preserved;
• review procedure defined;
• tax documents linked to the project;
• assumptions reproducible.

Final considerations

Split payment is more than a way to collect IBS and CBS. In engineering contracts, it connects taxation to measurement, financial settlement, cash flow, credits, and financing cost.

The main caution in 2026 is temporal. The system is in transition. The law already defines the architecture, but implementation is gradual and the special government-procurement regime does not produce all of its effects during the test year.

Therefore, the estimate needs to work with a base date, scenarios, and explicit assumptions.

The gross measurement amount and the contractor’s net cash should not be confused. Tax credits and financial availability are also different quantities.

Cost Engineering should reconcile these effects in BDI and cash flow, avoiding double counting and false certainty.

For multi-year contracts, the best defense against change is not trying to predict a definitive percentage. It is building a calculation memorandum that can be updated without losing traceability.

Technical references

[1] BRASIL. Lei Complementar nº 214, de 16 de janeiro de 2025, updated text. Establishes IBS, CBS, and the Selective Tax. Available at: [Câmara dos Deputados — updated LC nº 214/2025](https://www2.camara.leg.br/legin/fed/leicom/2025/leicomplementar-214-16-janeiro-2025-796905-normaatualizada-pl.html).

[2] BRASIL. Lei Complementar nº 227, de 13 de janeiro de 2026. Amends the regulation of IBS and CBS. Available at: [Planalto — consolidated LC nº 214/2025](https://www.planalto.gov.br/ccivil_03/leis/lcp/lcp214compilado.htm).

[3] BRASIL. Decreto nº 12.955, de 29 de abril de 2026. Regulates the Contribuição Social sobre Bens e Serviços — CBS. Available at: [Câmara dos Deputados — updated Decreto nº 12.955/2026](https://www2.camara.leg.br/legin/fed/decret/2026/decreto-12955-29-abril-2026-799019-normaatualizada-pe.html).

[4] RECEITA FEDERAL DO BRASIL. Tax Reform Guidance for 2026. Updated May 6, 2026. Available at: [Receita Federal — 2026 Guidance](https://www.gov.br/receitafederal/pt-br/acesso-a-informacao/acoes-e-programas/programas-e-atividades/reforma-tributaria-do-consumo/orientacoes-2026).

[5] RECEITA FEDERAL DO BRASIL. Understanding Brazil’s Consumption Tax Reform. Transition schedule from 2026 to 2033. Available at: [Receita Federal — Understanding Tax Reform](https://www.gov.br/receitafederal/pt-br/acesso-a-informacao/acoes-e-programas/programas-e-atividades/reforma-tributaria-do-consumo/entenda).

[6] TRIBUNAL DE CONTAS DA UNIÃO. Engenharia de Custos em Obras Públicas — Um guia de perguntas e respostas. Brasília: TCU, 2026. Available at: [TCU — Infrastructure](https://portal.tcu.gov.br/infraestrutura).

Frequently asked questions

What is split payment under Brazil’s Tax Reform?

It is the mechanism under which IBS and CBS may be segregated and collected at the time of financial settlement of the transaction, according to applicable legislation and implementation.

Is split payment already fully implemented in 2026?

No. The legislation provides for gradual implementation. 2026 is a test year for CBS and IBS, and the special allocation regime for government purchases does not produce all of its effects for taxable events occurring in 2026.

How does split payment affect a public works project?

It may change the difference between gross measured value and net cash received, affecting working capital, financial expenses, payment reconciliation, and BDI assumptions.

Is an IBS/CBS credit the same as cash?

No. A credit reduces the tax burden under the statutory conditions, but its appropriation, use, and possible refund follow specific rules and may occur at a different time from project disbursements.

Does construction for the Public Administration have a specific credit rule?

Yes. Decree No. 12,955/2026 removes, for construction services provided to direct public administration bodies, public agencies, and public foundations, the specific material-credit limitation provided in the main provision of Article 365.

Should split payment be included as a fixed percentage in BDI?

Not as a universal rule. The estimate should consider the applicable methodology and regulation, as well as the effective burden, credits, and cash-flow impact.

Does a change in split payment automatically generate economic-financial rebalancing?

No. It is necessary to demonstrate a supervening change, effective impact on the economic-financial equation, offsetting credits, causation, and absence of double recovery.

Should the Terms of Reference describe the entire tax mechanism?

No. They should define documentary responsibilities, payment assumptions, compliance with current legislation, and criteria for demonstrating impacts, avoiding freezing procedures subject to future regulation.

Complementary technical materials

Related services

• Cost Engineering for Construction and Engineering Services: quantities, cost compositions, BDI, and reference basis
• Technical Planning for Engineering Procurement: strategy, requirements, risks, and documentation
• Technical Review of Terms of Reference for Construction and Engineering Services
• Technical Support for Inspection of Construction and Engineering Contracts: control, evidence, and compliance

Main content on the topic

• Tax Reform in Construction: IBS, CBS, and impacts on construction BDI
• BDI in Construction and Engineering Services: what it is, calculation, and composition
• Public Works Estimating: how to structure quantities, costs, BDI, and risks

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