Ask a finance director what cleaning costs their site and most will quote you a chemical spend and a hygiene payroll figure. Both these numbers are accurate, but both numbers are wrong, in the sense that together they account for maybe half of what the site is actually paying.
The rest is spread across water, effluent, energy, downtime and risk, and none of it is labelled cleaning. It shows up on the utility bill, the production schedule, the insurance premium and, in the worst version, on the front page of the trade press. Because it never appears as a single line, it never gets a single review.
This article pulls all of that together into one place. By the end you will have a framework for calculating what your own site spends on getting clean, including the parts that are currently invisible, and a clear sense of which of those costs are fixed and which are simply habits nobody has questioned.
Cost one: the water you think is free
Water is the most misunderstood cost in food manufacturing. It arrives through a pipe, it appears on an invoice, and the invoice gets paid. There is rarely an owner. As one utilities consultancy put it, “energy gets a procurement review and materials get a procurement review, but water simply shows up on the bill and gets paid.”
Here is what is happening. You are paying for the same water three separate times.
You pay to bring it in. You pay to heat it, which we will come back to. Then you pay to get rid of it, and that third charge is the one almost nobody interrogates. Trade effluent in the UK is priced using the Mogden formula, which calculates the charge per cubic metre from a combination of volume, the chemical oxygen demand of the effluent, and its suspended solids content.
In other words, you are charged not just for how much wastewater you discharge, but for how dirty it is. Every litre of caustic, every surfactant, every acid descaler that goes to drain at the end of a cleaning cycle raises the organic load of your effluent and raises your bill accordingly. Meaning that higher strength effluent from food manufacturing already attracts significantly higher charges than ordinary sewage.
So your cleaning chemicals cost you twice. Once when you buy them. Once when the water company treats them on your behalf.
That double charge is getting more expensive. From April 2025, water companies in England and Wales were permitted to raise their charges, with wholesale water and wastewater rates rising by roughly 22% over a five year period, alongside a new annual Environment Agency enforcement levy on trade effluent permits. At the same time, the discount that large industrial users have historically enjoyed is being phased out by 2026-27, and an ammonia component has been added to the trade effluent calculation.
If your site is large enough to have negotiated a volume tariff at some point, that advantage is on a timer.
What the reduction is worth. In a trial with one of the industry’s largest food manufacturers, eloclear cut water use by 55%. That single change reduces the intake charge and the discharge volume charge at the same time. Because eloclear replaces petrochemical detergents rather than sitting alongside them, it also reduces the strength component that the Mogden calculation prices separately. Three reductions from one process change, on a cost line that is rising regardless of what you do.
Cost two: heating water you did not need to heat
Traditional cleaning depends on heat. Hot water at 40°C to 80°C, heated from cold, every cycle, on every line, every night the site runs.
Nobody questions it because it is not really a decision. It is the design assumption underneath the entire cleaning protocol. But it is worth separating two different things that tend to get treated as one.
The first is the pre-rinse, where temperature does real, soil-specific work. A hot pre-rinse shifts gross debris and softens fat faster than cold water does, and different fats let go of a surface at different degrees of warmth: butter and poultry fat give up at fairly modest heat, beef and pork fat need more, lamb more again. EHEDG Guide 52 sets out this kind of soil-by-soil thinking in some detail. It cuts the other way for protein, though. Meat, blood and egg residues respond better to a cold or lukewarm rinse first, because heat that helps fat tends to denature protein and fix it onto the surface instead of lifting it off, which is the opposite of what you are trying to do. More heat is not automatically better here. It depends entirely on what is being cleaned off.
The second is the water used to dilute the chemical concentrate itself, and this is where the real, unexamined waste tends to sit. Chemical suppliers typically specify a maximum dilution temperature, usually below 50°C. Plenty of sites run hotter than that anyway, out of habit rather than any measured improvement, and what that extra heat actually does to the chemical’s cleaning or disinfection performance is not well established either way. Nobody has tested it on most sites. The gas gets burned regardless.
Run the arithmetic on your own site and it becomes uncomfortable quickly. Take your cleaning water volume per cycle, the temperature rise required, the number of cycles per week, and your current gas or electricity unit rate. For most mid to large sites, cleaning is one of the largest single thermal loads on the plant, and it happens when production is not running and generating revenue.
eloclear works effectively in cold water, as the working solution itself, which is where the dilution water sits, and it cuts the thermal load significantly. In a recent manufacturer trial, energy use fell by 71%, driven mainly by the drop in hot water used for cleaning. The pre-rinse ahead of it still follows the soil logic above: a full cold rinse depends on the site having a cold water supply to draw on, and a warm or hot pre-rinse is often still the right call first, depending on what’s being removed.
Cost three: the labour bill you cannot safely cut
Hygiene payroll is the one cleaning cost that does appear clearly on the P&L, which is exactly why it takes the hit whenever margins tighten.
The pressure is real. Employer National Insurance rose to 15% in April 2025 and the secondary threshold dropped from £9,100 to £5,000. The National Living Wage went to £12.21 in April 2025 and £12.71 in April 2026. For a labour intensive site running large shift teams, the combined effect landed immediately.
The structural problem is worse than the headline rate, though, and it is the part that gets underdiscussed. You cannot lift the bottom rung of a pay ladder without everyone standing on the rungs above it noticing. When entry level pay rises sharply, the operatives one and two grades up see their differential compress, and they reasonably ask why they should carry extra responsibility for a few pence an hour. The cost of the wage floor moving is not the wage floor. It is the re-grading exercise that follows it up through the site.
Faced with that, cutting hygiene hours looks like sensible financial management. It is the wrong lever, and we have written before about why hygiene headcount cuts are a false economy.
Here is the better lever. The answer to a hygiene labour cost problem is not fewer hygiene hours. It is fewer hygiene hours required. Those are completely different propositions. One removes cost and adds risk. The other removes cost and leaves the risk profile intact or improves it.
In the same trial, cleaning time fell by 30%. On a site running a nightly sanitation window, that is either payroll saved or, more usefully for many operations, production capacity released. A cleaning window that closes 30% earlier is a plant that can start earlier.
Cost four: the chemicals you pay for more than twice
The chemical purchase invoice is the visible cost. Around it sits a cluster of costs that never get attributed back to cleaning chemistry.
There is the storage. Bunded areas, ventilation, segregation of incompatible products, all of it taking up floor space that could be doing something else. There is the handling. COSHH assessments, PPE, training, and the incident exposure that comes with concentrated caustics and acids on a site full of people working nights. There is the packaging waste stream, the IBCs and drums and shrink wrap, and the transport emissions attached to delivering all of it.
Then there is the part most sites do not see coming until an invoice lands noticeably higher than the last one, for no reason anyone on site can point to. Caustic soda and chlorine-based products such as hypochlorite come out of the same industrial process, and that process runs on electricity. When electricity prices move, chlorine and caustic move with them, and so does everything downstream that is made from them.
Detergents built on petrochemical feedstock follow a different but equally exposed path. An oil price spike, a refinery outage, a shipping delay out of a producing region, and the cost of the drum on your loading bay changes for reasons that have nothing to do with your site, your usage, or your supplier’s service. A cleaning programme built on delivered chemistry inherits that volatility as a fixed feature, not an occasional shock.
And there is the effluent strength charge from cost one, which is the same money appearing a second time on a different invoice.
eloclear reduced chemical use by 45% in a recent trial. More significantly, it changed the category of what was on site, because the active was generated from salt and water on site, rather than manufactured elsewhere and shipped in. A cleaning input you produce on demand is not exposed to a supplier’s price list or a supplier’s lead time. If you want the technical detail on how that works in practice, our comparison of eloclear against traditional chemical cleaning covers the process side.
Cost five: the one you cannot budget for
Everything so far is a number you can model. This one is not, and that is precisely why it dominates the total.
A food recall costs, on average, around £10 million. That figure covers the mechanics, the destroyed stock, the downtime, the investigation, the deep clean, the legal and regulatory costs. It does not cover retailer delisting, and it does not cover the years afterwards.
The recent Listeria picture makes the point better than any model. In June 2026, Listeria monocytogenes was detected in frozen cooked chicken imported from Brazil and distributed to catering services including NHS trusts and care networks. In the samples tested, levels were within the standard legal limits for general sale. The withdrawal happened anyway, because any level of Listeria presents a risk to vulnerable groups.
That is the detail food manufacturers should be paying attention to. The product was legally compliant and it still came off the market, because the destination made the risk unacceptable.
The exposure also does not close when the stock is recovered. Listeriosis has an unusually long incubation period, with symptoms capable of appearing up to 70 days after exposure, so the investigation window stays open for months while the commercial damage compounds.
Now try to put a figure on what happens next. You can price the stock write off. You cannot price what a retailer’s technical team remembers about your site at the next range review. You cannot price the additional audit scrutiny you attract for the following three years, or the tender you are quietly not invited to. The costs you can calculate are the small ones.
With the tightened Listeria criteria applying across shelf life from July 2026, the gap between a compliant site and a genuinely controlled one gets more expensive to sit in.
Running the numbers on your own site
Take the five costs above and put them on one page. Water in. Energy to heat it. Labour to run the cycle. Chemicals to buy, store, handle and then pay to treat again as effluent. Risk if any of it fails.
Most sites have never seen those five numbers next to each other, which is exactly why the total is so much larger than anyone expects. Four of the five are addressable with a process change. The fifth is the reason the other four are worth addressing properly rather than shaving.
The trial figures quoted throughout this article came from one of the industry’s largest food manufacturers: 55% less water, 71% less energy, 30% less cleaning time, 45% fewer chemicals. Your site will produce its own numbers, and the only way to know them is to look. If you want to understand what those five cost lines look like on your plant, get in touch and we will work through them with you.
