Phoenix Journal · Kitchens
The green and black sticker carrying a number from 0 to 5 shapes how diners, platforms and insurers see your kitchen. Here is how that number is really decided - and where cleaning fits in.
If you run a commercial kitchen, few things shape first impressions quite like the green and black sticker in your window - the one carrying a single number from 0 to 5.
That number is your Food Hygiene Rating, and it does a lot of quiet work on your behalf. Diners glance at it before they book. Delivery platforms display it beside your listing. Landlords, insurers and event organisers increasingly ask to see it. Yet for something so visible, the scheme behind it is often misunderstood - treated as a mysterious verdict handed down on inspection day rather than the transparent, points-based assessment it actually is.
This guide walks you through how the Food Hygiene Rating Scheme really works: who runs it, what an officer looks at, how the score is calculated, and where the physical condition of your kitchen - including your extraction and ventilation - fits into the picture. Once you understand the mechanics, the rating stops feeling like luck and starts feeling like something you can plan for.
Who runs the scheme
The Food Hygiene Rating Scheme, or FHRS, is run by the Food Standards Agency in partnership with local authorities across England, Wales and Northern Ireland. Scotland operates its own separate scheme, the Food Hygiene Information Scheme, which uses a pass or improvement-required result rather than a number - so if you have sites either side of the border, expect the paperwork to look different.
A food safety officer, usually an environmental health practitioner from your local council, visits your premises and inspects them against food hygiene law. Crucially, the visit is unannounced. The officer is not judging your cooking or your menu - they are checking that the food you serve is safe to eat and that you have systems in place to keep it that way. Shortly after the visit you receive your rating and the accompanying sticker.
It is worth being clear about what the rating represents. It is a snapshot of the standards found on the day of inspection, not a rolling live score. That cuts both ways: a strong result reflects a good day, and a poor one can reflect a bad day rather than a lifetime of bad practice. The goal is to make every day inspection-ready, so that whenever the officer arrives, the snapshot is a flattering one.
How the score is calculated
The single number on your sticker is the product of three separate assessments, added together. Understanding this is the key to demystifying the whole scheme, because the officer is not awarding marks out of five - they are counting up penalty points, and a lower total is better.
The three elements are these. First, how hygienically food is handled - how it is prepared, cooked, reheated, cooled and stored. Second, the physical condition of the business - its cleanliness, layout, lighting, ventilation, pest control and facilities. Third, how the business manages food safety - your systems, your records, your HACCP plan and evidence that staff are trained and standards will hold.
Each element is scored in bands. Food safety and hygiene, and structural condition, can each be given 0, 5, 10, 15, 20 or 25 points. Confidence in management can be given 0, 5, 10, 20 or 30 points. In every case, 0 is the score you want - it signals full compliance - and the higher the figure, the further you are falling short. The three scores are added into a total, and that total is mapped onto the 0 to 5 rating you see on the door. A tidy total in the low tens tends to earn a 5, while scores climbing past the twenties and thirties pull the rating down towards 1 or 0.
There is one rule that catches a lot of operators out. Even a good overall total will not save you if a single element scores badly. Each rating band sets a cap on the worst any individual element can be, so one neglected area - a filthy extraction canopy, say, or a missing set of records - can hold your whole rating hostage regardless of how well the rest of the kitchen performs. The scheme rewards balance, not brilliance in one area propping up weakness in another.
Timing matters too. A rating of 5 is published online as soon as your local authority uploads it, but ratings of 0 to 4 are held back for roughly three to five weeks. That gap exists to give you a window to appeal a rating you believe is wrong, or to request a re-visit once you have put things right. In Wales and Northern Ireland you are legally required to display your rating prominently within 21 days of confirmation; in England, display is currently voluntary, though a poor result you choose to hide tends to be found online anyway.
Where extraction and deep cleaning fit in
Of the three elements, the physical condition of your premises is the one most directly shaped by cleaning - and it is the one where kitchen extraction quietly makes or breaks a score. Ventilation sits explicitly within the structural assessment, and an officer who lifts a canopy filter to find it clogged with grease, or spots carbon and soot streaking a ceiling, is looking at exactly the kind of evidence that pushes the structural band upward.
The reasoning is not cosmetic. Grease-laden extraction is a contamination risk and a fire risk, and a system that is not maintained signals a kitchen where dirt is allowed to accumulate out of sight. That impression bleeds into the third element as well: confidence in management. When an officer sees a documented, dated schedule of extract cleaning and filter changes, it tells them you manage the risks you cannot always see - which is precisely what they are trying to gauge. A clean canopy is worth points twice over, once for the structure and once for the confidence it inspires.
This is why so many operators treat a scheduled deep clean of the kitchen and its extraction as inspection insurance rather than a chore. Surfaces, equipment, walls and floors that are visibly clean, paired with ductwork and canopies certified to recognised standards, remove some of the easiest points an officer can award against you. If your rating has slipped and you need a structured way back, our guide to turning a one-star hygiene rating into a recovery plan sets out the practical steps, and our fuller overview of the Food Hygiene Rating Scheme digs further into appeals and re-visits.
Questions
Ratings run from 0 to 5, where 5 means hygiene standards are very good and fully comply with the law, and 0 means urgent improvement is necessary. A 3 is broadly satisfactory but signals room to improve. Most operators aim for a 5, since anything lower is visible to customers and delivery platforms and can dent bookings and trust.
There is no fixed interval - your local authority sets the frequency based on the risk your business presents, so a high-risk kitchen handling lots of fresh and cooked food will be visited more often than a low-risk operation. Visits are unannounced, which is why keeping standards inspection-ready every day matters more than preparing for a known date. If you have made improvements, you can also request a re-visit to have your rating reassessed.
Yes. Ventilation and extraction fall within the structural condition element that officers assess, so grease-clogged canopies, dirty filters or soot-streaked ductwork count directly against you. A poorly maintained system also undermines the officer's confidence in your management, which is scored separately. Because one weak element can cap your whole rating, neglected extraction can hold back an otherwise strong kitchen.
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