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Commercial ControlSales & Customers

Finding and stopping margin leakage

Understand where margin is being lost and which commercial controls need attention.

12 questions answered

Questions answered on this page

  1. 01Where is profit leaking out of my merchant business?
  2. 02Why has our gross margin fallen?
  3. 03How can I improve gross margin in a merchant business?
  4. 04Why does margin vary so much between branches?
  5. 05How do I know which parts of the business are actually making money?
  6. 06What are the biggest causes of margin leakage in a merchant?
  7. 07How do I know whether poor margin is a pricing problem or an operating problem?
  8. 08Why is our buying margin good but our selling margin poor?
  9. 09How do I protect margin when the market is competitive?
  10. 10What level of gross margin should a merchant aim for?
  11. 11How do I identify hidden costs that are reducing branch profitability?
  12. 12What should I look at first when profit starts falling?

Answers

01

Where is profit leaking out of my merchant business?

Profit usually leaks through many routine decisions rather than one dramatic failure. Typical sources include discounts that are not reviewed, supplier increases that are absorbed, customer terms that no longer reflect cost to serve, credits and returns, missed rebates, stock write-offs and expensive delivery patterns. Start by comparing gross margin percentage and gross profit value by branch, customer, product group and salesperson with the same period last year. Then reconcile the movement against price changes, purchase costs, rebates, credits and stock adjustments. That shows whether the loss sits mainly in buying, selling or operations. Avoid beginning with a general cost-cutting exercise. The first job is to locate the movement precisely enough to fix the cause without weakening service or profitable sales.

02

Why has our gross margin fallen?

A falling gross margin means the relationship between sales value and cost of sale has changed. The cause may be lower selling prices, higher purchase costs, a shift towards lower-margin customers or products, lost rebates, more credits, or inaccurate stock and cost records. Compare like with like before drawing a conclusion. Separate price, volume and mix; check whether supplier increases reached the price file; and look at gross margin by branch, customer and product family. A headline percentage can hide several opposing movements. One branch may be holding margin while another is losing it, or buying gains may be disappearing through discounting. The useful answer is not simply that margin is down, but which transactions and decisions account for the change.

03

How can I improve gross margin in a merchant business?

Improve gross margin by correcting the few recurring decisions that cause the largest loss. Identify where margin varies from an agreed range, then review the customers, products, branches and salespeople behind that variation. Common actions include updating price files promptly, tightening discount authority, passing on supplier increases, checking special prices after the job ends, recovering missed rebates and addressing returns or stock adjustments. Protect local judgement by setting clear boundaries rather than forcing every sale through central approval. Managers also need gross profit value and percentage alongside turnover in their regular reports. Improvement is more reliable when pricing, buying and operational actions are assigned to named owners and checked against actual transactions. A broad instruction to improve margin rarely changes behaviour because nobody can see which decision needs to change.

04

Why does margin vary so much between branches?

Branch margin varies because branches serve different customer and product mixes, but large or persistent gaps often point to inconsistent control. One branch may hold prices, update supplier increases quickly and manage credits well, while another relies on discretionary discounts, carries more project work or absorbs extra delivery and handling. Compare branches after allowing for genuine differences in mix. Look at margin by common product families and similar customer groups, then examine discount levels, price overrides, credits, stock adjustments and rebate treatment. The aim is not to force identical percentages across unlike branches. It is to distinguish an explainable commercial difference from a controllable operating gap. Strong branches can then provide evidence about which routines, information and management conversations are producing the better result.

05

How do I know which parts of the business are actually making money?

Turnover and gross margin alone do not show which activity is genuinely profitable. Build the view in layers: gross profit by branch, customer and product group; direct costs such as delivery, handling and sales effort; then the working-capital burden created by stock and credit terms. A large account may show acceptable invoice margin but require frequent small deliveries, special purchases, returns and long payment terms. A product group may earn margin yet consume cash through slow stock. Use existing data first and avoid false precision where costs cannot be allocated reliably. The objective is to identify materially different patterns, not manufacture an exact profit figure for every line. Review the largest and fastest-changing areas first, then investigate the operational reasons behind them.

06

What are the biggest causes of margin leakage in a merchant?

The most common causes are uncontrolled discounting, delayed price updates, supplier increases not passed through, weak management of special prices, missed buying terms or rebates, credits and returns, inaccurate product costs, stock write-offs and service costs that are not reflected in the deal. Customer and product mix also matter: growth can concentrate in work that carries a lower margin or higher delivery burden. The relative size of each cause differs by merchant, so a generic list should guide investigation rather than become the diagnosis. Quantify the movement using transaction data and management accounts, then test it with branch and commercial teams. Leakage becomes manageable when the business can connect a reported margin change to specific recurring decisions.

07

How do I know whether poor margin is a pricing problem or an operating problem?

Separate invoice margin from the costs and losses that arise after the sale. If gross margin is weak at the point of invoice, investigate selling prices, discounts, product costs, customer terms and mix. If invoice margin is sound but branch profit remains weak, examine delivery frequency, picking and handling, returns, credits, stock losses, overtime and local overhead. Some problems cross the boundary: a low price may have been agreed without recognising an expensive service promise. Compare gross profit with controllable operating costs by branch and customer, and trace a sample of apparently profitable sales through fulfilment and payment. That will show whether value was given away in the deal or consumed while servicing it.

08

Why is our buying margin good but our selling margin poor?

Good buying performance does not protect margin if the benefit is passed straight to customers or lost in execution. Sales teams may price from an old cost, use supplier support as an automatic discount, or treat rebate income as permission to reduce the invoice margin. Special buys can also distort the picture if their cost is not reflected accurately in the system. Reconcile purchase gains, rebates and settlement discounts with realised selling margin by product group and customer. Check whether price files and replacement costs are current, and whether salespeople can see the margin consequence of an override. Buying gains should strengthen the business. They should not disappear because commercial rules and system information fail to carry them through to the final sale.

09

How do I protect margin when the market is competitive?

Protecting margin does not mean refusing every discount. It means knowing where flexibility creates a worthwhile sale and where it merely transfers value to the customer. Set clear discount boundaries, require a reason for exceptions and review the outcome on significant accounts. Equip salespeople to discuss availability, service, reliability, technical support and total job value rather than price alone. Segment customers and products so that highly competitive lines receive deliberate treatment instead of setting the price expectation for the whole basket. Track lost orders as well as won orders; fear of losing business often leads to discounts without evidence. Local judgement remains important, but it works best with accurate costs, visible margin and management follow-up.

10

What level of gross margin should a merchant aim for?

There is no single gross margin percentage that suits every merchant. The required level depends on product mix, service model, stockholding, delivery intensity, customer terms, overhead and the return expected from the business. A low-service, fast-moving operation can work at a different percentage from a branch network carrying specialist stock and providing frequent delivery. Use your own economics first. Calculate the gross profit needed to cover operating costs, finance working capital and produce an acceptable return, then translate that into ranges for major branches and product groups. External comparisons can prompt questions, but they should not replace this calculation. The useful target is one that reflects how the business actually serves customers and is clear enough to guide everyday decisions.

11

How do I identify hidden costs that are reducing branch profitability?

Start with costs that grow through daily activity but are rarely connected to the sale that caused them. These include frequent small deliveries, urgent buying, overtime, repeated picking, returns, credits, stock damage, obsolete lines and management time spent resolving avoidable problems. Compare branches using both financial and operating measures, such as deliveries per order, credit frequency, stock adjustments and labour hours relative to gross profit. Then trace a small number of high-volume or apparently profitable accounts through the branch. The purpose is not to allocate every pound perfectly. It is to expose repeated work and service promises that consume enough resource to change the commercial decision. Hidden costs become visible when operational activity is reviewed alongside margin.

12

What should I look at first when profit starts falling?

Begin with a short bridge from the previous comparable period to the current result. Separate changes in turnover, gross margin percentage, payroll, property and other major operating costs. Within gross margin, check price, purchase cost, customer and product mix, credits, rebates and stock adjustments. Compare branches and focus on the largest movements rather than reviewing every account at once. Confirm that the data is complete before launching corrective action; timing differences in rebates or stock can create a misleading picture. Once the movement is located, speak to the managers closest to it and test the explanation against transactions. This sequence gives the business a factual starting point and reduces the risk of cutting useful capacity while the real commercial leak continues.

Patterns and standards

What you may be seeing

  • Turnover is stable or rising, but gross profit value and percentage are slipping.
  • Branches with similar markets produce very different margin results.
  • Supplier gains and rebates do not appear to improve the final result.
  • Credits, returns, stock adjustments or delivery activity are rising quietly.
  • Managers discuss sales performance more often than realised margin and cost to serve.

What good looks like

A well-controlled merchant can explain material margin movements quickly. Managers see gross profit value and percentage alongside turnover, know which decisions they can make locally and review meaningful exceptions. Supplier increases reach selling prices promptly, special terms have owners and review dates, and buying gains can be reconciled with realised selling margin. Operational losses such as credits, returns, stock adjustments and excess delivery activity are visible rather than buried. Branch differences can be explained by genuine mix or traced to a controllable practice. The result is not a business that refuses commercial judgement. It is one that uses evidence to protect profitable flexibility.

What may be happening underneath

Commercial visibility
Reports show the headline result but do not isolate price, mix, purchase cost and operational losses.
Decision boundaries
Discounts, special prices and service promises are made without clear authority or later review.
System discipline
Price files, product costs, rebates, credits and stock adjustments are not maintained consistently.
Operating cost
Delivery, handling, returns and urgent purchasing consume margin after the invoice is raised.
Management focus
Targets and reviews reward turnover while the quality and cost of the sale receive less attention.

Questions worth asking

  1. 01Which branches, customers and product groups explain most of the margin movement?
  2. 02How much comes from price, purchase cost and mix, and how much is lost after the sale?
  3. 03Which discounts and special prices remain in place after their original reason has ended?
  4. 04Are rebates, credits, returns and stock adjustments visible in the same management view?
  5. 05Which service commitments would we price differently if their true effort were visible?

Where to go next

Start by locating the control gap. The Business Control Score provides a short, structured view of where time, profit and control may be slipping. It is a practical starting point when the business can see the result but has not yet isolated the cause.

Complete the Business Control ScoreExplore Finance & Commercial toolkits

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