Published: 9 October 2025
The warning came from an industry veteran during my early days in marketing: “Never let your sales team know the actual cost price of what you’re selling. Over time, they’ll find ways to bring the selling price down to match it.” I dismissed this as cynical folklore, but decades of research and real-world evidence have proven this insight disturbingly accurate.
This phenomenon represents one of the most predictable yet preventable forms of profit erosion in business. Understanding why it happens – and how to combat it – could be the difference between sustainable growth and a slow march towards commoditisation.
The Academic Evidence is Clear
Research consistently demonstrates that information asymmetry between management and sales teams creates significant challenges for margin protection. A comprehensive study published in Marketing Science found that cost transparency, whilst sometimes beneficial in consumer markets, creates dangerous dynamics in B2B sales environments[1][2].
The core issue lies in behavioural economics. When sales representatives possess cost information, they unconsciously begin to anchor their pricing negotiations around these figures rather than value propositions[3][4]. This psychological anchoring effect, well-documented in pricing research, means that cost prices become mental reference points that gradually erode selling prices over time[5][6].
Studies examining sales compensation structures reveal that traditional revenue-based incentives, combined with cost knowledge, create perverse incentives. Sales teams facing quarterly pressure naturally gravitate towards “safe” margins above cost rather than defending premium pricing based on value delivery[7][8].
How Cost Knowledge Destroys Margins
The margin erosion process follows a predictable pattern that unfolds over months or years, making it particularly insidious for businesses that fail to recognise the early warning signs.
The Psychology of Reference Points
When sales representatives know that a product costs £50 to produce, their mental framework shifts fundamentally. Instead of thinking “this solution delivers £200 of value to the customer,” they begin thinking “we need to make some profit above £50.” This cognitive shift transforms value-based selling into cost-plus pricing[9][10].
Behavioural research shows that people struggle to ignore irrelevant anchoring information, even when they know it shouldn’t influence their decisions[3]. Cost prices become particularly powerful anchors because they feel concrete and “real” compared to more abstract value propositions.
The Gradual Erosion Process
The decline doesn’t happen overnight. Initially, sales teams might use cost knowledge to feel more confident in negotiations, believing they can defend pricing better. However, several dynamics gradually drive prices downward[11][12]:
Competitive pressure amplification: When competitors offer lower prices, sales teams with cost knowledge quickly calculate minimum viable margins rather than defending value propositions. They think, “We can go as low as £60 and still make money,” rather than “Our solution is worth £150 regardless of what competitors charge.”
Customer education: Over time, sales representatives inadvertently signal to customers that significant margin exists. Comments like “I think we can work something out” or “There might be flexibility in our pricing” train buyers to expect discounts[13][14].
Habituation effects: Each pricing concession sets a new baseline expectation. Sales teams become comfortable operating at lower margins, and customers become accustomed to negotiated prices rather than list prices[15][12].
The Cascade Effect
Perhaps most damaging is how cost knowledge creates cascade effects throughout the organisation. When one sales representative successfully closes deals at reduced margins, others feel pressure to match these prices to remain competitive[7][16]. This internal benchmarking accelerates margin compression across the entire sales force.
Research from McKinsey demonstrates that companies experiencing this cascade effect see margins compress by 15-25% over 2-3 years, with the erosion accelerating as it progresses[6][7].
The Competitive Intelligence Problem
Cost knowledge creates additional vulnerabilities when sales teams interact with customers and competitors. Industry research shows that information leakage through sales channels represents a significant competitive risk that many businesses underestimate[17][18].
Sales representatives armed with cost information may inadvertently reveal pricing flexibility during negotiations. Customers, particularly sophisticated B2B buyers, quickly learn to interpret signals about margin availability. This creates a dynamic where buyers become trained to expect discounts and negotiate more aggressively[1][19].
Furthermore, sales teams who understand cost structures may share this perspective with customers during value justification attempts. Statements like “Our costs have increased, so we need to raise prices” immediately shift conversations from value to cost-justification, undermining premium positioning[2][20].
Proven Prevention Strategies
Preventing cost-knowledge-driven margin erosion requires systematic approaches that address both structural and behavioural factors within sales organisations.
Information Architecture Design
The most effective companies implement what researchers call “strategic information asymmetry” – deliberately limiting cost visibility to sales teams whilst providing them with superior value-based selling tools[17][21].
Instead of cost information, provide sales teams with comprehensive competitive intelligence, customer success stories, and quantified value propositions. Research indicates that sales teams equipped with value-based information achieve 12-18% higher average selling prices compared to those with cost transparency[1][2].
Compensation Structure Alignment
Traditional volume-based compensation creates dangerous incentives when combined with cost knowledge. Leading companies increasingly adopt profit-margin-based compensation that rewards salespeople for maintaining pricing discipline[8][22].
Effective margin-based compensation typically includes threshold requirements that prevent sales teams from sacrificing significant margin for marginal volume increases. These structures ensure that pricing concessions directly impact individual compensation, creating personal incentives for margin protection[7][23].
Value-Based Selling Training
Academic research consistently shows that sales teams trained in value-based selling techniques achieve superior margin performance compared to those using traditional relationship or product-focused approaches[24][25]. This training becomes particularly crucial when implementing cost information restrictions.
Effective programmes focus on quantifying customer outcomes, competitive differentiation, and total cost of ownership rather than production costs or internal margins. Sales representatives learn to anchor conversations around customer value creation rather than supplier cost structures[13][26].
Price Governance Systems
Sophisticated companies implement pricing governance that removes individual discretion for significant discounting whilst maintaining sales flexibility for customer-specific value propositions[14][27]. These systems typically include approval workflows that escalate pricing decisions based on margin impact rather than absolute discount percentages.
Technology-enabled pricing tools can provide sales teams with approved pricing ranges without revealing underlying cost structures. This approach maintains pricing discipline whilst supporting legitimate customer negotiations[13][14].
Building Sustainable Margin Protection
Long-term margin protection requires cultural transformation within sales organisations. Research demonstrates that companies with strong “value cultures” consistently outperform those focused primarily on volume growth[24][28].
Building this culture requires consistent messaging from leadership, regular reinforcement through training programmes, and celebration of deals that maintain premium pricing rather than those that achieve maximum volume. Sales teams must understand that their role includes margin stewardship, not just revenue generation[26][28].
Customer segmentation represents another critical element. Different customer segments exhibit varying levels of price sensitivity and value recognition. Sales teams should understand which customers prioritise value over price and focus relationship investment accordingly[29][30].
Regular margin analysis helps identify early signs of erosion before they become entrenched patterns. Companies that conduct quarterly margin reviews by sales representative, customer segment, and product line can intervene quickly when concerning trends emerge[14][31].
The fundamental principle remains clear: sales teams who know cost prices will, over time, find ways to erode margins toward those costs. This isn’t a reflection of poor sales performance or malicious intent – it’s predictable human psychology that successful companies must actively counter through intelligent information architecture, aligned incentives, and disciplined pricing governance.
Protecting your margins requires protecting your cost information. The businesses that recognise this reality and act accordingly will maintain competitive advantages that their more transparent competitors gradually sacrifice.
Reference and Further Reading
[1] Cost transparency can increase sales 20% https://www.fortinberrymurray.com/todays-research/cost-transparency-can-increase-sales-20
[2] Lifting the Veil: The Benefits of Cost Transparency https://dash.harvard.edu/bitstreams/7312037d-8233-6bd4-e053-0100007fdf3b/download
[3] Pricing Psychology https://thedecisionlab.com/reference-guide/psychology/pricing-psychology
[4] What is Behavioral Economics in Sales? (Explained With … https://www.breakcold.com/explain/behavioral-economics-in-sales
[5] Price Cues and Customer Price Knowledge https://www.kellogg.northwestern.edu/faculty/anderson_e/htm/personalpage_files/Papers/Price%20Cues%20Book%20Chapter%20Jan%203.pdf
[6] The Hidden Power of Pricing https://www.mckinsey.com/~/media/mckinsey/business%20functions/marketing%20and%20sales/our%20insights/ebook%20the%20hidden%20power%20of%20pricing%20how%20b2b%20companies%20can%20unlock%20profit/the-hidden-power-of-pricing.pdf
[7] Pricing: Distributors’ most powerful value-creation lever https://www.mckinsey.com/capabilities/growth-marketing-and-sales/our-insights/pricing-distributors-most-powerful-value-creation-lever
[8] 10 Sales Incentive Plan Examples That Actually Work https://www.everstage.com/sales-incentive/sales-incentive-plan-examples
[9] Behavioral & Psychological Pricing Strategy https://www.simon-kucher.com/en/consulting/commercial-strategy-pricing-consulting/pricing-strategy-revenue-management/psychological-pricing
[10] How to Win Customers with Behavioral Pricing https://www.buynomics.com/articles/behavioral-pricing
[11] What is Price Erosion? – DealHub https://dealhub.io/glossary/price-erosion/
[12] Stop Gross Margin Erosion: 7 Proven Strategies https://www.hubifi.com/blog/gross-margin-erosion-guide/
[13] Price Erosion: Causes, Impact, and Strategies to Combat It https://www.vendavo.com/pricing/price-erosion-explanation-prevention/
[14] Avoid Margin Erosion: Strategies for Profit Protection https://www.vendavo.com/selling/how-to-avoid-margin-erosion/
[15] Margin Compression. What’s it Mean for Your Retail Stocks? https://www.entrepreneur.com/finance/margin-compression-whats-it-mean-for-your-retail-stocks/447556
[16] 10 Steps To Avoid Margin Compression And Eliminate … https://www.forbes.com/councils/forbesbusinesscouncil/2020/09/04/10-steps-to-avoid-margin-compression-and-eliminate-margin-leakage/
[17] The Information Asymmetry between Top Management and … https://mitsloan.mit.edu/sites/default/files/inline-files/The%20Information%20Assymetry%20between%20Top%20Management%20and%20Rank%20and%20File%20Employees.pdf
[18] The effect of asymmetric information on product market … https://www.sciencedirect.com/science/article/abs/pii/S0304405X16301957
[19] Lifting the Veil: The Benefits of Cost Transparency https://ximarketing.github.io/class/papers/transparency.pdf
[20] Lifting the Veil: The Benefits of Cost Transparency https://www.hbs.edu/ris/Publication%20Files/15-017_f67df7f5-8336-47fc-a0c1-098838aa550d.pdf
[21] The Information Asymmetry between Management and … https://www.smu.edu/-/media/site/cox/departments/accounting/the-information-asymmetry-between-management.pdf
[22] Sales Compensation: What a Plan Can Look Like & How to … https://blog.hubspot.com/sales/sales-compensation
[23] Commission clawbacks in sales compensation plans https://www.drivetrain.ai/post/commission-clawbacks-in-sales-compensation-plans
[24] 6 Practical Tips for Protecting Profit Margin https://brooksgroup.com/sales-training-blog/6-practical-tips-protecting-profit-margin/
[25] 8 Strategies for B2B Sales Teams to Manage Price Increases https://www.pricefx.com/learning-center/8-strategies-for-b2b-sales-teams-to-manage-price-increases
[26] How to Get Your Sales Team to Focus on Margin Pricing https://www.pricefx.com/learning-center/how-to-get-your-sales-team-to-focus-on-margin-pricing
[27] Pain Points: Price Protection https://212f.com/insights/pain-points-price-protection/
[28] The Importance of Protecting Margins https://www.linkedin.com/pulse/importance-protecting-margins-kevin-gauthier-l4whe
[29] Margin Erosion: Understanding and Preventing Profit Decline https://www.markt-pilot.com/en/margin-erosion
[30] The Impact of Rebates on Profit Margins https://blog.speedylabs.ai/impact-of-rebates-on-profit-margins/
[31] Price Erosion: What Is It, and How Do You Stop It? https://metricscart.com/insights/overcoming-price-erosion/
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