What Is Tender Analysis?
Tender analysis is the structured process of examining, comparing, and evaluating the tenders received for a construction project. It sits between tender receipt and contract award — the critical window during which the quantity surveyor must determine whether each submission is arithmetically correct, commercially sound, technically compliant, and represents genuine value for money. It is one of the most important tasks a QS performs, and it is where the commercial success or failure of a project often begins.
The distinction between tender analysis and tender evaluation is worth making at the outset. Tender evaluation is the broader process — it encompasses everything from setting the evaluation criteria to scoring quality submissions and writing the tender report. Tender analysis is the detailed, forensic work within that process: checking the numbers, examining the rates, identifying anomalies, comparing pricing across tenderers, and forming a commercial judgement about what each submission actually means. It is the QS’s core contribution to the evaluation process, and it requires a combination of technical skill, market knowledge, and commercial experience.
This article covers the full tender analysis process in UK construction: from opening the tenders through to the final recommendation, including the practical techniques QS professionals use to interrogate pricing, detect errors, identify risk, and advise their clients with confidence.
The Tender Analysis Process
Tender analysis follows a logical sequence. While the exact approach varies depending on the procurement route, contract form, and project complexity, the core steps are consistent across most construction projects.
Step 1: Tender Receipt and Opening
Tenders are received in sealed form — whether physically or, more commonly now, through an electronic tendering portal. They must be opened at the same time, typically witnessed by at least two members of the client team, and a formal record made of each submission including the tenderer’s name, the tendered sum, any qualifications or caveats noted, and the date and time of receipt. Late tenders are ordinarily excluded unless there are exceptional circumstances — and the rules for handling late submissions should have been set out in the invitation to tender.
This formality matters. The tender process must be demonstrably fair, and a clear audit trail protects the client against allegations of favouritism or manipulation. In public sector procurement under the Procurement Act 2023, the requirements are particularly strict — any failure in the process can expose the contracting authority to legal challenge.
Step 2: Preliminary Compliance Check
Before examining the pricing in detail, the QS carries out a preliminary compliance check to ensure each submission meets the basic requirements of the tender. This includes confirming that the form of tender has been signed, that all required documents have been submitted (priced BOQ, programme, method statement, quality submission), that no unauthorised qualifications or conditions have been attached, that the tender period was respected, and that any requested bonds, warranties, or insurances have been confirmed.
Qualifications are a common issue. A contractor might submit a tender with a qualification stating “subject to a 12-week programme extension” or “excludes all piling works.” These qualifications change the commercial basis of the tender and make a like-for-like comparison impossible. The QS must decide — in accordance with the tender rules — whether to reject the submission, ask the tenderer to withdraw the qualification and confirm their price, or accept the qualification and adjust the comparison accordingly.
Step 3: Arithmetic Check
The arithmetic check is the most fundamental stage of tender analysis, and it is surprising how often errors are found. The QS checks every extension (quantity multiplied by rate), every page total, every collection, every summary, and the grand total. On a fully measured bill of quantities for a £20M project, the BOQ might contain 2,000 to 3,000 individually priced items — and arithmetic errors in even a small percentage of those items can produce a significant discrepancy.
Common arithmetic errors include incorrect multiplication of quantity by rate (for example, pricing 150m² of blockwork at £45/m² as £6,250 instead of £6,750), page totals that do not add up, items carried forward to the summary incorrectly, rounding errors that accumulate across hundreds of items, and items left unpriced — either genuinely missed or deliberately omitted to reduce the tender sum.
When errors are found, the treatment depends on which alternative has been specified in the tender documents. The two standard approaches in UK practice, derived from the JCT Practice Note and widely adopted across the industry, are as follows.
Alternative 1 — the tenderer stands by their tender sum. The tender sum is not corrected. Instead, the tenderer is notified of the errors and given the choice to confirm their offer or withdraw. If they confirm, the tender sum stands and a note is added to the contract that, where errors exist, the tender sum prevails over the individual rates. This means the tenderer bears the risk of any underpricing. In practice, the individual rates may be adjusted pro rata so that they reconcile with the unchanged tender sum — these adjusted rates then form the basis for valuing variations.
Alternative 2 — the tender sum is corrected. The tender sum is adjusted to reflect the true arithmetic. If the corrected sum exceeds the original tender, the tenderer can withdraw or confirm at the corrected figure. If the corrected sum is lower, the reduced figure stands. This approach ensures the rates are correct and can be relied upon for post-contract administration, but it can alter the ranking of tenderers — which is why the choice of alternative must be declared before tenders are invited.
Consider a practical example. A contractor submits a tender of £18,450,000 for a mixed-use development. The QS’s arithmetic check reveals errors totalling a net underpricing of £127,000 — giving a corrected sum of £18,577,000. Under Alternative 1, the tender remains at £18,450,000 and the contractor carries the risk. Under Alternative 2, the tender is adjusted to £18,577,000 and the rates stand as priced. If the next-lowest tender was £18,520,000, the choice of alternative could determine which contractor is recommended.
Step 4: Rate Analysis and Comparison
Once the arithmetic is verified, the QS examines the individual rates in detail. This is where tender analysis moves from mechanical checking to professional judgement. The QS is looking for three things: rates that appear unreasonably high, rates that appear unreasonably low, and patterns of pricing that suggest a commercial strategy rather than a genuine build-up of cost.
The most effective approach is to prepare a comparative schedule — a spreadsheet that places the rates from each tenderer side by side against the same BOQ items, with the QS’s own estimate or a published benchmark (such as Spon’s, BCIS, or the QS’s own database) as a reference point. This makes anomalies immediately visible.
On a £12M office building, the comparative schedule for the structural frame might look like this.
| BOQ Item | Unit | Qty | Tenderer A (£) | Tenderer B (£) | Tenderer C (£) | QS Estimate (£) |
|---|---|---|---|---|---|---|
| Reinforced concrete to columns | m³ | 185 | 385.00 | 410.00 | 280.00 | 395.00 |
| Reinforced concrete to slabs | m³ | 620 | 295.00 | 305.00 | 340.00 | 300.00 |
| Formwork to columns | m² | 740 | 62.00 | 58.00 | 48.00 | 60.00 |
| Formwork to soffits of slabs | m² | 3,100 | 45.00 | 42.00 | 85.00 | 44.00 |
| High-yield reinforcement | t | 210 | 1,850.00 | 1,920.00 | 1,780.00 | 1,880.00 |
| Structural steelwork | t | 95 | 3,200.00 | 3,350.00 | 2,400.00 | 3,150.00 |
In this example, Tenderer C immediately attracts scrutiny. Their rate for reinforced concrete to columns (£280/m³) is significantly below both the other tenderers and the QS estimate. Their structural steelwork rate (£2,400/t) is 24% below the QS estimate. But their formwork to soffits rate (£85/m²) is nearly double the market norm. This pricing pattern suggests either a genuine error in rate build-up, a deliberate rebalancing of rates for commercial advantage, or a fundamental misunderstanding of the specification.
The QS cannot simply note the anomaly and move on. They must form a view on what it means. If Tenderer C has underpriced the steel and concrete but overpriced the formwork, is the total for the structural frame broadly correct — or has the rate imbalance distorted the overall price? More importantly, will the imbalanced rates cause problems during post-contract administration? If the formwork quantities reduce during construction (as they often do when the design is refined), the contractor’s valuation falls by £85/m² for every square metre omitted — a significant loss. Conversely, if the concrete quantities increase, the contractor benefits at a below-market rate. This is the kind of analysis that separates a competent QS from an experienced one.
Detecting Front-Loading and Unbalanced Pricing
Front-loading is the practice of inflating rates for work carried out early in the project and reducing rates for later work, so that the contractor receives a disproportionate share of the contract value in the early months. It improves the contractor’s cash flow at the client’s expense — effectively, the client is providing interest-free financing — and it increases the client’s financial exposure if the contractor becomes insolvent mid-project.
There are two main forms of unbalanced pricing that the QS must look for.
Time-based front-loading. The contractor inflates rates for early-stage work (substructure, structural frame, external envelope) and deflates rates for later-stage work (second fix, finishes, external works). On a £15M project, a contractor might add £300,000 to the substructure and structural frame rates and reduce the finishes and external works by the same amount. The tender sum is unchanged, but the payment profile shifts dramatically forward. By month 6 of an 18-month contract, the client may have paid 55% of the contract value for work that represents only 40% of the physical progress.
Quantity-based loading. The contractor increases rates on items where they believe the final measured quantity will exceed the BOQ quantity, and decreases rates on items where they believe the final quantity will be less. This is a more sophisticated strategy that requires knowledge of typical quantity movements on similar projects. For example, if a contractor knows from experience that provisional quantities for earthworks on school projects typically increase by 15 to 20%, they might load the earthworks rates and reduce the rates on items less likely to change. The gain comes during remeasurement — the loaded rates are applied to higher quantities, and the reduced rates apply to unchanged or reduced quantities.
Detecting unbalanced pricing requires the QS to look at both the absolute rates (are they reasonable in isolation?) and the relative rates (is the overall pricing pattern commercially logical?). A contractor with abnormally high preliminaries and abnormally low measured rates is effectively front-loading through the preliminaries. A contractor with very high rates for provisional sum attendance and very low rates for the measured work is loading on the items most likely to generate additional payment.
The practical tool for detection is a cash flow comparison. The QS prepares a projected cash flow for each tender, based on the programmed sequence of work, and compares the payment profiles. If one tender shows a markedly more front-loaded cash flow than the others — with the same programme duration and the same scope of work — unbalanced pricing is likely present.
Examining Preliminaries
Preliminaries — the contractor’s time-related and fixed costs for managing the project — are one of the most variable elements in any tender and deserve particular attention during analysis. On a typical construction project, preliminaries represent 8% to 15% of the contract sum, and the variation between tenderers can be substantial.
The QS should review the preliminaries pricing at three levels. First, the total — is the contractor’s total preliminaries figure in line with the expected range for this project type, size, and duration? Second, the breakdown — how has the contractor distributed costs between project management staff, site facilities, plant and equipment, temporary works, and general project costs? Third, the time-related versus fixed split — what proportion of the preliminaries are time-related (and would therefore increase if the project overruns) versus fixed costs incurred regardless of duration?
Consider three tenders for a 14-month, £10M primary school project, each with a different preliminaries structure.
| Preliminaries Element | Tenderer A (£) | Tenderer B (£) | Tenderer C (£) |
|---|---|---|---|
| Site management staff | 280,000 | 310,000 | 195,000 |
| Site establishment and facilities | 85,000 | 90,000 | 80,000 |
| Temporary works and plant | 120,000 | 105,000 | 95,000 |
| Scaffolding | 75,000 | 80,000 | 65,000 |
| Health and safety | 35,000 | 40,000 | 30,000 |
| Insurances and bonds | 55,000 | 50,000 | 48,000 |
| General project costs | 45,000 | 50,000 | 42,000 |
| Total Preliminaries | 695,000 | 725,000 | 555,000 |
| % of Tender Sum | 10.8% | 11.2% | 8.5% |
Tenderer C’s preliminaries are noticeably lower, driven primarily by site management staff costs of £195,000 compared to £280,000 to £310,000 from the other two tenderers. Over a 14-month contract, £195,000 for site management implies roughly £14,000 per month — which is barely sufficient for a full-time site manager, let alone a project manager, quantity surveyor, and site engineer. Either Tenderer C is planning to manage the project with a skeleton team (which raises quality and programme risks), they have absorbed some management costs into the measured rates (making the rates less reliable for post-contract variations), or the preliminaries have been genuinely underpriced. The QS should seek clarification before making a recommendation.
Assessing Provisional Sums and Daywork
Provisional sums and daywork allowances are areas where the tenderers’ pricing is not directly comparable — because the scope of provisional sum work is, by definition, not yet defined — but the QS can still draw useful conclusions from how each tenderer has priced them.
The main concern with provisional sums is the attendances. When a provisional sum is expended during construction, the contractor is entitled to additional payment for the profit and attendance associated with the specialist work. A contractor who has priced high attendances on provisional sums (say, 15% for general attendance and 5% for profit) will cost the client more when provisional sums are finalised than a contractor who has priced lower attendances (10% general attendance and 2.5% profit). The QS should compare these allowances across the tenderers and factor them into the overall value assessment.
For daywork, the QS should check the rates against published schedules — the RICS Schedule of Basic Plant Charges and the Definition of Prime Cost of Daywork Carried Out Under a Building Contract. A contractor whose daywork labour rate is 30% above the published schedule is either pricing conservatively or hoping to profit from daywork instructions. Either way, the QS should note the implication and discuss it with the client.
Qualitative Assessment
Tender analysis is not purely a numbers exercise. On most modern construction tenders — particularly in the public sector — the quality submission forms a significant part of the evaluation. The QS contributes to the qualitative assessment by reviewing the contractor’s programme for realism (does the construction sequence make sense, are the durations reasonable, have lead-in times been allowed for?), reviewing the methodology for buildability and risk management, assessing the management structure against the project’s complexity, and evaluating the contractor’s approach to health and safety, sustainability, and social value.
Quality scoring must be carried out in strict accordance with the published evaluation criteria. Each assessor should score independently before the panel meets to moderate, ensuring that scores reflect the content of the submission rather than preconceptions about the contractor. In public sector procurement, the moderation process must be documented — any successful legal challenge would typically focus on whether the scoring was consistent and defensible.
The Tender Report
The output of the tender analysis is the tender report — a formal document prepared by the QS for the client that summarises the entire evaluation and recommends the preferred tenderer. The tender report is one of the most important documents the QS produces. It must be clear, objective, and robust enough to withstand scrutiny — whether from the client’s board, an auditor, or (in the public sector) the courts.
A well-structured tender report typically includes the following.
Executive summary. A one-page summary of the tender process, the number of tenders received, the range of tender sums, and the recommendation.
Process summary. A description of the tender process including the procurement method, the tender list, the tender period, and any mid-tender queries or addenda issued.
Compliance check results. Confirmation of which tenders were compliant and details of any qualifications or non-compliances identified.
Arithmetic check results. A schedule of the arithmetic errors found in each tender, the corrections applied (under Alternative 1 or Alternative 2), and the corrected tender sums.
Price analysis. The comparative analysis of the tenders including the overall ranking, the rate comparison for key items, any anomalies identified (front-loading, unbalanced pricing, abnormally low rates), and the QS’s commentary on each tender’s pricing.
Preliminaries comparison. A breakdown of each tenderer’s preliminaries with commentary on any significant differences.
Quality assessment. The scores for each quality criterion, the moderated results, and a summary of each tenderer’s strengths and weaknesses.
Combined score. The weighted price and quality scores, showing the overall ranking of the tenderers.
Risk assessment. A summary of the key commercial risks associated with each tender — for example, abnormally low rates that may lead to claims, tight programmes that may not be achievable, or qualifications that have not been fully resolved.
Recommendation. A clear statement of which tenderer is recommended and the reasons for the recommendation, including any reservations or conditions.
Worked Example: Tender Analysis for a £22M Leisure Centre
To bring the process together, consider a worked example. A local authority is procuring a new £22M leisure centre under a JCT Design and Build contract, tendered through a selective process with four shortlisted contractors. The evaluation weighting is 60% price, 40% quality.
The four tenders are received as follows.
| Tenderer | Submitted Sum (£) | Arithmetic Errors (£) | Corrected Sum (£) |
|---|---|---|---|
| Contractor A | 21,840,000 | +32,000 | 21,872,000 |
| Contractor B | 22,150,000 | -8,500 | 22,141,500 |
| Contractor C | 21,620,000 | +215,000 | 21,835,000 |
| Contractor D | 22,480,000 | Nil | 22,480,000 |
Under Alternative 2, the corrected sums are used for comparison. Contractor C submitted the lowest tender but had significant arithmetic errors totalling £215,000 — a 1% discrepancy that raises questions about the care taken in preparing the submission. After correction, Contractor C remains the lowest at £21,835,000, but by a narrow margin over Contractor A at £21,872,000.
The QS’s rate analysis reveals that Contractor C has priced the M&E installation at 18% below the other tenderers and the QS estimate. Given that M&E typically represents 35% to 40% of a leisure centre project, this is a material concern. Contractor C’s preliminaries are also 20% below the average — consistent with a lean management structure that may struggle on a technically complex facility with a swimming pool, sports hall, and multiple service zones.
The quality scores are as follows.
| Quality Criterion | Weight | Contractor A | Contractor B | Contractor C | Contractor D |
|---|---|---|---|---|---|
| Design approach and methodology | 10% | 8 | 7 | 6 | 9 |
| Programme and sequencing | 10% | 7 | 8 | 5 | 8 |
| Management structure and key personnel | 8% | 8 | 7 | 6 | 8 |
| Health and safety | 5% | 7 | 8 | 7 | 7 |
| Social value and sustainability | 7% | 7 | 6 | 5 | 8 |
| Weighted quality score | 40% | 29.9 | 28.8 | 23.2 | 32.4 |
To calculate the price score, the QS uses the standard formula where the lowest corrected tender receives the maximum price weighting, and other tenders are scored proportionally: price score = (lowest corrected sum ÷ tenderer’s corrected sum) × price weighting. The combined scores are as follows.
| Tenderer | Corrected Sum (£) | Price Score (60%) | Quality Score (40%) | Combined Score | Rank |
|---|---|---|---|---|---|
| Contractor A | 21,872,000 | 59.90 | 29.90 | 89.80 | 1 |
| Contractor B | 22,141,500 | 59.17 | 28.80 | 87.97 | 3 |
| Contractor C | 21,835,000 | 60.00 | 23.20 | 83.20 | 4 |
| Contractor D | 22,480,000 | 58.27 | 32.40 | 90.67 | 2 (see note) |
At first glance, Contractor D scores highest overall at 90.67, driven by the strongest quality submission. However, Contractor D’s price is £608,000 above Contractor A — a 2.8% premium. Whether that premium is justified depends on how the client weighs the superior quality submission against the additional cost. The QS’s recommendation might note that Contractor A offers the best value on the published 60/40 weighting, scoring 89.80, while Contractor D offers a demonstrably stronger team and methodology at a modest price premium. Contractor C, despite submitting the lowest price, scores poorly on quality and carries the additional risk of significantly underpriced M&E work.
This is the kind of nuanced analysis that a tender report should present — not simply a ranking table, but a commercial narrative that helps the client make an informed decision.
Common Mistakes in Tender Analysis
Focusing only on the bottom line. Comparing tender sums without examining the underlying rates is like judging a book by its cover. Two tenders at £15M can have fundamentally different commercial profiles — one may be solidly priced with realistic rates throughout, while the other arrives at the same total through a combination of overpriced and underpriced items that will cause problems during the contract.
Ignoring programme implications. A tender is not just a price — it is a price for delivery within a specified time. If one tenderer’s programme is two months shorter than the others, the QS should question whether the programme is achievable and whether the preliminaries pricing supports it. A 14-month programme with 12 months of preliminaries is inconsistent and should be queried.
Failing to investigate anomalies. When the QS identifies a rate that is significantly above or below the market, the temptation is to note it and move on. But anomalies are signals — they may indicate a pricing error, a deliberate commercial strategy, a misunderstanding of the specification, or a genuine cost saving that the other tenderers have missed. Each anomaly should be investigated sufficiently to form a professional view on its cause and consequence.
Mechanical application of the scoring formula. The scoring formula produces a ranking, but the ranking should not be the end of the analysis. The QS should interrogate the results — does the ranking make commercial sense? Are there risks in the recommended tender that the scoring formula does not capture? Would the client be better served by the second-ranked tenderer if the price difference is marginal but the quality is demonstrably higher?
Inadequate documentation. Every step of the analysis should be documented. In public sector procurement, the tender report is a legal document that may be reviewed by an unsuccessful tenderer, a procurement auditor, or a judge. Even in the private sector, a well-documented analysis protects the QS if the recommended contractor subsequently underperforms and the client questions the basis of the appointment.
Tools and Technology
Tender analysis has traditionally been a spreadsheet exercise, and for many QS practices it still is. Microsoft Excel remains the workhorse — used for arithmetic checks, rate comparisons, scoring matrices, and cash flow projections. A well-structured tender analysis workbook with linked sheets for each tenderer, a comparison summary, and an automated scoring model is one of the most valuable tools in a QS practice.
However, the industry is gradually moving towards more sophisticated approaches. Cost management platforms such as CostX, Buildsoft, and Causeway’s estimating tools can automate parts of the arithmetic checking process and provide digital audit trails. Some larger practices use bespoke databases to benchmark tender rates against historical data from completed projects, enabling faster and more reliable anomaly detection. Building Information Modelling (BIM) is also beginning to influence tender analysis — where a project has a detailed BIM model, the QS can compare the tenderers’ quantities against the model quantities to verify that the BOQ has been priced correctly and consistently.
Despite these advances, tender analysis remains fundamentally a professional judgement exercise. The technology can accelerate the mechanical checking, but the commercial interpretation — deciding what a pattern of rates means, whether a low price is genuinely competitive or dangerously optimistic, and whether the recommended tender represents the best value for the client — requires the QS’s experience, market knowledge, and professional skill. No software can replicate that.
Conclusion
Tender analysis is where the QS adds the most concentrated value in the entire procurement process. It is the point at which raw numbers are translated into commercial intelligence — where a list of competing prices becomes a reasoned recommendation that shapes the outcome of the project.
The process demands precision in the arithmetic, rigour in the rate analysis, commercial awareness in detecting front-loading and anomalies, and clarity in presenting the findings to the client. A QS who simply checks the sums and recommends the cheapest tender is doing half the job. A QS who examines the rates, questions the patterns, investigates the anomalies, and presents a balanced analysis that addresses both price and risk is doing the job properly.
For professionals working in consultancy practice, tender analysis is a core competency that underpins the client’s trust in the QS’s advice. For contractor QS professionals, understanding how tenders are analysed on the other side of the table is equally valuable — it informs how tenders should be priced, presented, and defended. And for students preparing for professional accreditation, tender analysis is one of the most examined and assessed areas of practice. Master it early, and it will serve you throughout your career.