Skip to main
alert-icon
Only limited material is available in the selected language. All content is available on the global site.

Visit our global site in English, or select an alternative location or language below

  • Americas
  • Europe
  • Asia & Pacific

Brazil

Home page:
  • Portuguese

Canada

Home page:
  • English
  • French

Latin America

Home page:
  • Spanish

United States

Home page:
  • English
Current Page:
  • English

Belgium

Home page:
  • Dutch
  • French

Czech Republic

Home page:
  • Czech

Denmark

Home page:
  • Denmark

France

Home page:
  • French

Germany

Home page:
  • German

Hungary

Home page:
  • Hungarian

Italy

Home page:
  • Italian

Netherlands

Home page:
  • Dutch

Norway

Home page:
  • Norwegian

Poland

Home page:
  • Polish

Portugal

Home page:
  • Portuguese

Romania

Home page:
  • Romanian

Slovakia

Home page:
  • Slovak

Spain

Home page:
  • Spanish

Sweden

Home page:
  • Swedish

United Kingdom

Home page:
  • English

Australia

Home page:
  • English

China

Home page:
  • Simplified Chinese

Hong Kong

Home page:
  • English

India

Home page:
  • English

Japan

Home page:
  • Japanese

Malaysia

Home page:
  • English

New Zealand

Home page:
  • English

Philippines

Home page:
  • English

Singapore

Home page:
  • English

South Korea

Home page:
  • English

Taiwan

Home page:
  • English

Thailand

Home page:
  • English

Vietnam

Home page:
  • English
Wolters Kluwer Logo
    • Health

      • UpToDate

        Industry-leading clinical decision support

      • Ovid

        Medical research platform

      • UptoDate Lexidrug

        Evidence-based drug referential solutions

      • Simplifi+ Pharmacy Compliance

        Pharmacy compliance solutions

      Health Overview

      Tax and Accounting

      • Tax & Accounting U.S. Hub

        Central hub for all U.S. solutions

      • CCH Axcess™ Suite

        Cloud-based tax and accounting solution

      • CCH® ProSystem fx®

        Integrated tax and accounting software

      • TaxWise®

        Tax preparation software for tax preparers

      Tax & Accounting Overview

      Financial & Corporate Compliance

      • CT Corporation

        Registered agent & business license solutions

      • Compliance Solutions

        Loan, regulation, and investment compliance

      • BizFilings

        Small business incorporation services

      • eOriginal

        Frictionless lending from borrower to secondary markets

      Financial & Corporate Compliance Overview

      Legal & Regulatory

      • VitalLaw®

        Legal research database for attorneys

      • Legisway

        Legal management software for legal departments

      • Enterprise Legal Management

        Legal spend and matter management

      • Mediregs

        Medical coding and healthcare compliance

      Legal & Regulatory Overview

      Corporate Performance & ESG

      • CCH Tagetik

        Unified performance management software

      • Enablon

        Software solutions for EHS, ESG & operational excellence

      • TeamMate

        Audit and assurance solutions

      • Corporate Tax

        Direct and indirect tax software solutions

      Corporate Performance & ESG

      Useful Links

      • Solutions Directory
      • Product Login
      • eShop
      • Solutions

        • Clinical practice
        • Medical research
        • Education and training
        • Data and compliance
        Health Overview

        Roles

        • Hospital technology leaders
        • Nursing leaders
        • Clinical leaders
        • Pharmacy leaders
        • Health plan executives
        • Medical librarians
      • Solutions

        • Tax solutions for accounting firms
        • Tax solutions for tax prep offices
        • Accounting & audit solutions
        • Research solutions & resources
        Tax & Accounting Overview
      • Solutions

        • Registered Agent Services
        • Compliance Program Management
        • Incorporation Services for Entrepeneurs
        • Business License Solutions
        • Lien Solutions
        • Banking Compliance Solutions
        Financial & Corporate Compliance Overview

        Roles

        • Law firm – Attorneys, Paralegals
        • Corporate compliance – Attorneys, Paralegals, Tax
        • Small business owners
      • Solutions

        • Enterprise legal management
        • Legal research database for attorneys
        • Management software for legal departments​
        • Integrated practice management for law firms
        Legal & Regulatory Overview
      • Solutions

        • Corporate performance management software
        • Environmental, Health & Safety (EHS) Software​
        • Audit management & assurance solutions
        • Corporate tax solutions
        Corporate Performance & ESG Overview
    • Business Insights Hub

      Unlock future-ready Insights and navigate the complexities of today's business world with confidence. Wolters Kluwer’s Business Insights empowers professionals and decision-makers to stay ahead of the curve through innovative thinking, analysis, and expert insights to drive your business forward.

      Visit the Insights Hub

      Featured Reports

      • Future Ready Accountant
      • Future Ready Healthcare
      • Future Ready Lawyer

      Trending Topics

      • Artificial Intelligence
      • Business Transformation
      • Data Analytics & Reporting
      • Decision Making & Productivity
      • Risk & Regulatory Compliance
      • Insights

        • How nurse leaders can navigate a year defined by transformation
        • Opportunities for AI to empower preventive healthcare
        • Develop your scholarship in nursing education
        • Centralized solutions help align drug development teams, providers, and patients

        Trending Topics

        • Future Ready Healthcare
        • AI in Healthcare
        • Reducing Clinical Burnout
        • Optimizing Medication Management
        • Healthcare Data Intelligence
        • Supporting Clinical Judgment
      • Insights

        • How smaller tax firms can cut costs and transform tax compliance with modern software
        • CCH® AnswerConnect and the no taxes on overtime pay rule
        • Navigating the One Big Beautiful Bill Act health coverage changes with CCH® AnswerConnect
        • Combatting misinformation about personal car loan interest deductions

        Trending Topics

        • Audit Management
        • Future Ready Accountant
        • Artificial Intelligence (AI) in Tax and Accounting
        • BEPS Pillar Two Compliance
        • One Big Beautiful Bill Act (OBBBA)
      • Insights

        • 57 small business ideas for 2026
        • Tax relief for victims of Washington severe storms, straight-line winds, flooding, landslides, and mudslides: IRA and HSA deadlines postponed
        • From oversight to strategy: The skills redefining the modern compliance officer
        • 2025: A year in review for corporation, LLC, and other business entity laws

        Trending Topics

        • Equipment lease and finance digital transformation index
        • Business licenses
      • Insights

        • Navigating rate volatility: Why company size affects your legal spend strategy
        • Privacy in transition: What 2025 taught us and how to prepare for 2026
        • Visser’s editorial team helps you prepare for the EQE
        • Legal Leaders Exchange - Podcast episode 32

        Trending Topics

        • Economic and interest rate forecasts
        • Future Ready Lawyer
      • Insights

        • Global Corporate Survey 2025: AI Budgets, Priorities and Tech Preferences
        • Best Practices: New Approaches to SIF Prevention
        • Mitigating risk and driving growth with predictive FP&A and scenario planning
        • Generative AI in FP&A: From hype to real impact
        • From vision to value: Thriving in a changing sustainability landscape
        • Innovation fit for Finance: our customers made us Leaders
        • Bitcoin, blockchain, and beyond: Audit essentials for assurance leaders
        • Legacy vs. Innovation: A strategic debate on finance transformation
  • News

    Wolters Kluwer newsroom is a one stop destination for the latest company news, insights, media contacts, and information.

    Visit Our Newsroom

    Newsroom Hub

    • Media Inquiries
    • Annual Report
    • Media Resources
    • Awards
    • Events

    Latest News

    • Wolters Kluwer appoints Dean Sonderegger as Senior Vice President and General Manager of ELM Solutions business
    • Wolters Kluwer acquires StandardFusion
    • Wolters Kluwer appoints Maria Montenegro as CEO of Corporate Performance & ESG division
    • Wolters Kluwer launches Libra Legal AI Workspace in the Netherlands
    • A global journey in Finance: how AI adoption differs across regions
    • Wolters Kluwer study sets the stage for 2026 with sharp contrasts in regional law firm rates and shifting negotiation dynamics
    • Wolters Kluwer CCH® Tagetik achieves IBM Cloud for Financial Services® Validated designation
    • Wolters Kluwer launches Expert AI enhancements to CoursePoint+, meeting the rapidly changing demands of nursing education
  • About Wolters Kluwer

    Wolters Kluwer is a global leader in information, software solutions and services for professionals in healthcare; tax and accounting; financial and corporate compliance; legal and regulatory; corporate performance and ESG.

    Learn More about Wolters Kluwer

    Organization

    • Organization
    • Management
    • Strategy
    • Company Values
    • AI Principles
    • People of Progress

    Useful Links

    • Annual Report
    • Newsroom
    • Contact Us
    • Media Inquiries
  • Investors
  • Careers
Search Wolters Kluwer
    No Suggestion

    Visit our global site in English, or select an alternative location or language below

    • Americas
    • Europe
    • Asia & Pacific

    Brazil

    Home page:
    • Portuguese

    Canada

    Home page:
    • English
    • French

    Latin America

    Home page:
    • Spanish

    United States

    Home page:
    • English
    Current Page:
    • English

    Belgium

    Home page:
    • Dutch
    • French

    Czech Republic

    Home page:
    • Czech

    Denmark

    Home page:
    • Denmark

    France

    Home page:
    • French

    Germany

    Home page:
    • German

    Hungary

    Home page:
    • Hungarian

    Italy

    Home page:
    • Italian

    Netherlands

    Home page:
    • Dutch

    Norway

    Home page:
    • Norwegian

    Poland

    Home page:
    • Polish

    Portugal

    Home page:
    • Portuguese

    Romania

    Home page:
    • Romanian

    Slovakia

    Home page:
    • Slovak

    Spain

    Home page:
    • Spanish

    Sweden

    Home page:
    • Swedish

    United Kingdom

    Home page:
    • English

    Australia

    Home page:
    • English

    China

    Home page:
    • Simplified Chinese

    Hong Kong

    Home page:
    • English

    India

    Home page:
    • English

    Japan

    Home page:
    • Japanese

    Malaysia

    Home page:
    • English

    New Zealand

    Home page:
    • English

    Philippines

    Home page:
    • English

    Singapore

    Home page:
    • English

    South Korea

    Home page:
    • English

    Taiwan

    Home page:
    • English

    Thailand

    Home page:
    • English

    Vietnam

    Home page:
    • English
    blog image
    Tax & AccountingUpdatedDecember 01, 2020

    Construction Company Audits: Red Flags in the Actual Audit

    By: Mark Friedlich, ESQ., CPA

    Red flags in the actual audit

    In previous blogs, we identified some red flags that might get the attention of the state sales and use tax auditor both before and during the various stages of a sales and use tax audit of a construction company. In this blog, we focus on some of the red flags that may arise in the actual audit with the construction company. It is at this stage where the rubber meets the road for both the auditor and the taxpayer — at the end of this phase, any adjustments will be proposed formally and that will start the clock on legal process.

    Objective of a sales and use tax audit

    The objective of any tax audit is to determine the correct amount of tax, in the most efficient manner, for the state and the taxpayer. Sometimes, the auditor may have more than one way to audit an issue. In making that decision, the auditor has to consider not only efficiency and accuracy of the method, but materiality as well. Items of negligible amounts are considered immaterial and are not relevant.

    Computer- and noncomputer-assisted audits

    There are basically two audit approaches: computer-assisted audits and noncomputer-assisted audits.

    Computer-assisted audits

    Ideally, the auditor would prefer to use his or her audit software tools to “plug into” the taxpayer’s books and records as seamlessly as possible and select transactions for review. It is in the interest of both auditor and taxpayer to use the most efficient and time-saving methods to get through the audit as quickly as possible. So, the more sophisticated the software used by the taxpayer to gather and process sales and use tax information, the better off everyone is.

    However, in many construction companies, the software used to process sales and use tax transactions may not lend itself to computer-assisted audits. In that case, the audit must be done manually—noncomputer-assisted audits. This is much more labor intensive and time consuming for all involved.

    Non-computer-assisted audits: Potential "red flag” for the auditor

    In general, a detailed examination of the taxpayer’s records is the preferred method of determining the correct tax. However, this may be the least practical method because of the number of records encountered. Tests used, frequently referred to as “sampling” often reduce the number of detailed examinations.

    In some cases, an examination of only a few invoices may be needed to make a determination or provide enough substantiation to support a position to the auditor’s satisfaction. A simple test, depending on the findings, may later require a more complex test that might include the design of a more substantial sample, such as “statistical sampling.”

    There are many types of tests that an auditor could perform, but the auditor determines the test that best fits each case. The auditor may even be face an issue that may require a specially designed test. Some things for the auditor to consider when selecting or designing a test include:

    • the volume of records,
    • the probability that an error exists, and
    • the materiality of any possible error.

    Typical audit areas of focus

    Verification and reconciliation are the basic functions that should drive the audit. Typical areas of focus would include:

    • Nexus
    • Tax Collection and Accruals
    • Tax Charged Sales
      • Tracing to Original Documents
      • Checking Rates
    • Use Tax Accruals
    • Exemptions and exemption certificates
    • Purchases – Use Tax Examination

    In carrying these audit procedures, the auditor examine the standard books and records of the company’s accounting system—journal entries, ledgers, etc. However, construction taxpayers should be prepared to produce other documents on request such as:

    • Billings, both progress and final
    • Job cost folders:
      • Plans and specifications
      • Estimate of costs
    • Copy of contract
    • Copy of purchase invoices for direct charges to job
    • Copy of requisitions for material withdrawn from inventory
    • Time cards for both in-plant labor and labor at jobsite
    • Files of paid purchase invoices

    Construction company issue spotting during the audit

    If you have done your “homework” throughout the various stages of the audit process — pre-audit research and in-person interviews, there should be few surprises during the actual audit. Such “surprises” may occur when the auditor traces selected transactions from “start to finish” and gets unexpected results—a big red flag! The more unexpected the results, the more digging the auditor will do.

    If a complex issue is spotted, the auditor will “encourage” the taxpayer to provide a statement that supports its position on that issue. This need not be a bad thing for the taxpayer because it is generally better to be the first to frame the issue in a light most favorable to itself. And if it has reliable, accurate and easy-to-access sources for the tax research, these sources will assist in producing a timely, well-reasoned response to the issue that will have the effect of discouraging “fishing expeditions.”

    What are some of those issues that construction companies might anticipate?

    Of course, auditors in different states may focus on some issues more than others. However, using California and Texas audit guides as examples, here are some of the typical issues that are often raised during the actual conduct of the audit.

    Installed property v. property that is not installed

    Where any property is delivered to the job and not installed by the contractor, a sale of tangible personal property may have been made, and the transaction is not considered an improvement to realty. If the property installed is “machinery and equipment,” this is a “red flag” if classified as an improvement to realty because “machinery and equipment” is not an accessory to the building and does not serve a function of the building itself.

    Matching of actual operations with key documents:

    • contracts,
    • billing documents (progress and retention) and
    • change orders

    It is important to note that the contract is the primary document for determining tax. However, if a contract is only verbal, billing and change order documents should be considered as determinative as the contract. If accounting operations do not properly match these key documents, that is a “red flag” that sales taxes may not have been correctly computed and paid.

    Is the contractor on a tax-paid or nontax-paid basis?

    The auditor is looking to verify that the contractors are actually responsible only for tax on the purchase cost and that all purchases are properly tax paid or reported. The company’s accounting records for costs of operation must reflect correctly the contractor’s actual responsibility for:

    • costs only
    • costs of installed materials and selling price of over-the-counter sales or
    • the cost of materials and billed price for fixtures

    If they do not match up, this is another “red flag” for the auditor.

    Resale certificates

    Auditors must determine that the applicable sales tax is the liability of the contractor/purchaser as opposed to the liability of the seller. Therefore, the auditor must obtain a copy of the resale certificate for each such purchase made from the seller for which the contractor is the consumer. If the contractor’s records of such certificates are incomplete or sloppy, that is another “red flag,” and the auditor may contact the seller directly to request copies of the certificates.

    Expense and supply items Included in costs

    If the contractor is not properly charging tax-paid supply and expense items to expense accounts, rather than being included in material purchases, that is a “red flag” to the auditor to dig deeper.

    Fixed assets and expense items

    According to the California audit manual, a key item to watch for here is the accounting method for transactions involving withdrawals of materials from inventory for own use. Such misuse is another “red flag.”

    Interstate and foreign commerce transactions after Wayfair

    Auditors will be focused more on nexus than ever before. Why? The Supreme Court, in its decision in Wayfair v South Dakota expanded the reach of states across the country to impose sales and use tax obligations on retail, as well as other businesses up and down the supply chain throughout the country (so-called economic nexus). [Wayfair-related blogs]. These new, often complex requirements demand many more resources and include the obligation to register, to keep records, to track rapidly changing rates and rules, and to collect and remit sales and use taxes.

    If contractors cannot show that they have incorporated Wayfair-related changes into their sales and use tax transaction processing, this is another “red flag” that the sales tax on invoices may not be correct. 

    Particular applications

    Every state must also be reviewed for special requirements that auditors may focus on. To the extent that such special requirements are not being met by the contractor, this is a “red flag” that deserves closer review by the auditor.

    Examples in California

    • Prefabricated cabinets
    • Prefabricated buildings
    • Factor-built housing

    Examples in Texas

    • Real Property Services
    • Landscaping
    • Janitorial Services
    • Care and Maintenance of Lawns
    • Surveying
    • Garbage Removal
    • Structural Pest Control
    • Real Property Service v. maintenance

    Day of reckoning: Auditor’s written proposal of adjustments

    Audit recommendations

    During the course of the audit, the auditor should have discussed all major audit issues with the taxpayer as they arose. The audit recommendations therefore should come as no surprise to the taxpayer and should state whether or not the taxpayer agrees or disagrees with the audit findings. The taxpayer then has to decide which issues it will concede and which ones it will challenge, using all of the appeal procedures applicable in each state. Knowing when to “hold” and when to “fold” is a combination of principled and practical considerations. Although there is no “right answer” for all situations, fair and reasonable conduct throughout the audit on both sides of the table is an important factor in making that decision.

    Post-audit review

    Whatever the decision on a particular audit, the company should conduct a post-audit review as soon as possible to review the audit adjustment just made with the objective of making changes to its sales and use tax processes to prevent future audit adjustments of a similar nature. It is almost impossible to overstate the importance of having access to experienced tax professionals who can guide you through this review process and provide sound compliance advice backed up and supported by best-in-class technology tools. This advice and tools can help to avoid all of the “red flags” identified:

    • before the audit in order to reduce the chances of an audit in the first place,
    • during the audit in order to achieve as favorable an outcome of any future audits as possible, and
    • after the audit in order to put in place the fixes needed to reduce the chances of an audit in the future.

    Pitfalls and Best Practices for Construction Sales and Use Taxes white paper

    What You Need to Know for Sales Tax Compliance and Audit Preparation

    Download White Paper
    Mark Friedlich
    Mark Friedlich, ESQ., CPA
    Vice President of US Affairs for Wolters Kluwer Tax & Accounting
    Mark Friedlich, a CPA & tax lawyer, is the Vice President of US Affairs for Wolters Kluwer Tax & Accounting. He is a member of the U.S. Senate Finance Committee’s Chief Tax Counsel’s Advisory Board, advisor to 14 state taxing authorities, and has been a member of the American Bar Association’s Tax Section and AICPA’s Tax Section leadership teams. Prior to joining Wolters Kluwer he was a COO and Principal at PwC.

     

    Explore related topics

    Expert insightsAuditSales Tax Nexus
    Solutions for Tax & Accounting Professionals

    Tax, accounting, workflow, and firm management solutions to help your firm succeed, with the research tools you need to stay informed.

     

    U.S. Tax & Accounting Hub
    How we help
    Professional Tax Software
    Tax & Accounting Research

    Related insights

    What's new with CCH Axcess™ Audit - December 2025 Bitcoin, blockchain, and beyond: Audit essentials for assurance leaders Automated fraud and automated attacks: How AI agents are changing cybersecurity

    Related Insights

    • Tax relief for victims of Washington severe storms, straight-line winds, flooding, landslides, and mudslides: IRA and HSA deadlines postponed
      Article
      Compliance
      Tax & Accounting
      January 06, 2026

      Tax relief for victims of Washington severe storms, straight-line winds, flooding, landslides, and mudslides: IRA and HSA deadlines postponed

      Due to destruction caused by severe storms that took place in parts of Washington beginning December 9, 2025, the IRS has announced that affected taxpayers will receive tax relief. As a result, certain IRA and HSA deadlines are extended.
      Learn More
    • IRA distributions and federal income tax withholding: IRS Releases 2026 Form W-4R
      Article
      Compliance
      Tax & Accounting
      December 31, 2025

      IRA distributions and federal income tax withholding: IRS Releases 2026 Form W-4R

      As it relates to federal income tax withholding on most IRA distributions, the 2026 version of Form W-4R has been posted by the IRS.
      Learn More
    • Tax relief for the Leech Lake Band of Ojibwe Tribal Nation affected by severe storms and straight-line winds: IRA and HSA deadlines postponed
      Article
      Compliance
      Tax & Accounting
      December 19, 2025

      Tax relief for the Leech Lake Band of Ojibwe Tribal Nation affected by severe storms and straight-line winds: IRA and HSA deadlines postponed

      Due to destruction caused by severe storms that took place in parts of Minnesota beginning June 21, 2025, the IRS has announced that affected taxpayers will receive tax relief. As a result, certain IRA and HSA deadlines are extended.
      Learn More
    • IRAs, HSAs, and CESAs: Year-end reporting
      Article
      Compliance
      Tax & Accounting
      December 15, 2025

      IRAs, HSAs, and CESAs: Year-end reporting

      Tax reporting is one of the primary responsibilities of an IRA, HSA, or CESA custodian, or trustee. This article primarily focuses on 2025 year-end distribution reporting for these types of tax-advantaged accounts.
      Learn More
    Footer Navigation
    1. Back to

      Home
    2. Back to

      Expert Insights
    3. Construction Company Audits: Red Flags in the Actual Audit
    • About Wolters Kluwer
    • Strategy
    • Organization
    • Management
    • News & Press Releases
    • Events
    • Solutions Directory
    • Health
    • Tax & Accounting
    • Corporate Performance & ESG
    • Financial & Corporate Compliance
    • Legal & Regulatory
    • Expert Insights
    • Careers
    • Investors
    • Site Owner

    Wolters Kluwer Tax & Accounting US

    • My Account
    • Shop
    • Support
    • Product Training
    • Product Login
    Follow Wolters Kluwer US
    • Facebook
    • Twitter
    • LinkedIn
    • Instagram
    • YouTube
    Wolters Kluwer Logo

    When you have to be right

    • Terms of Use
    • Privacy & Cookies
    • Manage Cookie Preferences
    • Your California Privacy Choices
      Your California privacy Choices

    © 2026 Wolters Kluwer N.V. and/or its subsidiaries. All rights reserved.

    Back To Top