How to Avoid Untrustworthy Tradesmen on Commercial Tenders
- 19 Jun 2026
- Articles

Photo by PB Swiss Tools on Unsplash
Winning commercial work generally comes down to finding the right balance on the value triangle between cost, capability and reliability. Yet many organisations still focus too heavily on the price when assessing tenders, only to discover later that the cheapest bid was not necessarily the best value.
Whether you are procuring roofing work, electrical installations, maintenance contracts or you are contemplating a larger construction project, selecting an untrustworthy contractor can lead to a world of pain including delays, budget overruns and disputes. These can even lead to reputational damage and in the worst case, can expose your organisation to legal and compliance risks.
The challenge is that unreliable contractors are not going to advertise themselves as such. Most present professionally, provide convincing paperwork and promise excellent service. The best procurement professionals know where to look beyond the surface.
Start with verification, not price
One of the most common mistakes in commercial tendering is allowing price to dominate the decision-making process. An unusually low bid should not automatically be viewed as a bargain. Procurement and fraud specialists consistently identify abnormally low tenders as a warning sign because they can indicate unrealistic pricing, hidden costs, poor-quality materials or an intention to recover profit through contract variations later in the project.
So before even starting to evaluate costs, verify that every bidder is a legitimate, established business. Check company registration details, insurance certificates, health and safety documentation and relevant trade accreditations. A trustworthy contractor will be only too happy to provide them, and if they prevaricate, that in itself should set alarm bells ringing.
It is also worth checking independent review platforms and industry directories for roofing contractors, electricians, plumbers and so on. These provide an additional source of information when conducting initial due diligence.
Examine their track record carefully
Tender submissions usually include impressive case studies and client lists. Unfortunately, not all claims can be taken at face value. Misrepresentation of credentials, project experience and qualifications is a recognised form of tender fraud. Some contractors exaggerate previous work, inflate turnover figures or claim accreditations they do not genuinely hold.
Rather than simply accepting references supplied by the contractor, take the time to verify them. Speak directly with previous clients where possible and ask pertinent questions:
- Was the project delivered on time?
- Did the final cost match the quotation?
- Were problems resolved professionally?
- Would they use the contractor again?
General praise is useful, but detailed answers often reveal far more about how a company performs under real-world conditions.
Watch for pressure tactics
Commercial procurement should never feel rushed. Fraud and risk specialists frequently identify urgency as a common warning sign. Contractors who push for immediate decisions, discourage due diligence or claim that special pricing will disappear unless a contract is signed quickly may be attempting to bypass normal scrutiny.
A professional contractor will understand that commercial procurement processes take time. If a bidder appears irritated by reasonable requests for information, that alone speaks volumes about how they will behave once a contract has been awarded.
Look beyond the tender submission
A polished proposal does not always reflect operational reality. One useful exercise is to evaluate how a contractor communicates throughout the tender process. Do they answer questions clearly? Are requested documents supplied promptly? Do they demonstrate an understanding of the project requirements? Poor communication during procurement often becomes even more problematic once work begins.
Similarly, pay attention to inconsistencies. Differences between pricing schedules, qualifications, insurance details and company information indicates carelessness at best and dishonesty at worst.
Assess financial stability
Even the most honest and capable contractor can create significant problems if they are financially unstable. Commercial projects can easily extend over several months, and sometimes longer. If a contractor experiences cash flow difficulties midway through a project, delays and quality issues will quickly follow.
Where appropriate, obtain credit reports, review filed accounts and consider requesting evidence of financial standing. Larger projects may justify more detailed financial due diligence. A company that appears significantly underpriced compared with competitors may simply be attempting to win work at any cost to address short-term financial pressures.
Create a robust evaluation process
Perhaps the best defence against untrustworthy tradesmen is a structured procurement process. Establish clear evaluation criteria before tenders are submitted. Score bidders against factors such as experience, compliance, health and safety performance, references, methodology and financial stability as well as price.
This reduces the risk of making decisions based on persuasive salesmanship or headline costs alone. It is also important to document decisions carefully. Transparent procurement processes help protect organisations from disputes and reduce opportunities for favouritism, manipulation or poor decision-making. Ultimately, the goal is not to find the cheapest contractor. It is to find the one most likely to deliver the project successfully, safely and without unpleasant surprises.






