The handful of numbers a water hygiene firm should actually track

Search for water hygiene KPIs and you get lists of forty. Ignore them. A small firm needs four or five numbers to know whether it is making money, and the rest are decoration until those are solid. The ones that earn their place: profit per visit, cost per job, first-time-fix rate, engineer utilisation, and contract renewal rate.

Track those consistently before you add a sixth. The advice from people who do this for a living is the same everywhere, which is to pick three to five metrics and track them consistently rather than drowning in a dashboard of forty you glance at once and never open again. A firm that measures five things well beats one that measures forty badly, every time.

Profit per visit, the number most firms never calculate

Revenue per visit is easy and slightly useless. The number that matters is what is left after the visit's real costs: engineer labour for the time on site and travelling, parts and consumables, and the travel itself. A £180 visit that took a half-day round trip for one engineer and used £30 of chemicals is not a £180 visit. Work it out per visit type, a routine monthly monitoring call, a TMV service, a tank clean, and you find the truth most firms run on instinct: some of your regular work barely breaks even once travel is honest, and some of the jobs you resent are your best earners. You cannot price or prioritise sensibly until you know which is which. We have argued the pricing side of this from asset count and your own costs; profit per visit is how you check whether the price actually held.

Cost per job, so you know your own floor

Related but distinct: what does it cost you to deliver a given job, all-in, before any margin? Cost per job, meaning labour, parts, travel and a share of overhead, is the floor beneath every quote. Firms that do not know it quote from a competitor's price or a gut feel and discover the shortfall at year end. Once you know your cost per job type, a discount becomes a decision with a number attached instead of a hopeful guess. It also tells you the thing a busy owner most needs before agreeing to a rush job or a favour: whether you can actually afford it.

First-time-fix rate, the one with an actual benchmark

First-time-fix is the share of jobs you complete on the first visit, without a return trip for a part, a permit or a second pair of hands. It is worth watching because every failed first fix is a second trip you usually cannot bill. The field-service average sits around 80%, per IBM figures, and firms above roughly 85% tend to run lower costs and happier customers. Those are general field-service numbers, not water-hygiene-specific, so use them as a direction rather than a target to hit exactly. For our trade the common first-fix killers are predictable: turning up without the right TMV cartridge, no permit to access a plant room, or a sample that needs a return you did not scope. Most are a stock or scheduling problem, which means most are fixable.

Utilisation, before you blame the diary

Engineer utilisation is the share of paid engineer time that lands on chargeable work rather than travel, admin or waiting. It answers whether "we are flat out but not making money" needs more sales or better routing. Low utilisation with a full diary usually means engineers are driving too far between jobs or losing an hour a day to paperwork in a lay-by. A scheduling view that shows the whole week at once is where the wasted miles tend to surface, because a route nobody can see is a route nobody optimises. Neither the driving nor the paperwork shows up in revenue, and both eat the profit per visit you worked out earlier.

Renewal rate, the one that compounds

For a firm built on recurring contracts, the renewal rate, the share of contracts that renew rather than lapse or leave, is the number that decides whether next year starts ahead or behind. Winning work is expensive; keeping it is cheap by comparison. A firm renewing most of its book grows on top of a stable base, while a firm with a leaky renewal rate runs to stand still no matter how good its sales are. If you track one number about the future, this is it.

Look at them monthly, not never

A number you calculate once for a board pack and never revisit is worse than useless, because it gives the feeling of measurement without the habit. The point of a small set is that you can actually keep it. Pull the five figures on the same day each month, put them in a single row next to last month's, and read the direction. A profit per visit that has slipped three months running is a pricing or routing problem you can still fix; the same slide noticed at year end is a loss you already took. The discipline is duller than the dashboard, and it is the whole game.

Why there is no magic benchmark to hit

You will not find reliable water-hygiene-specific values for most of these, and anyone selling you "the industry-standard profit per visit" is guessing. The values that matter are your own, tracked over time, so the useful question is not "am I above the benchmark" but "is this month better than last quarter, and do I know why". Consistency beats precision. Four numbers you actually record every month tell you more than forty you calculated once for a spreadsheet nobody reopened.

A blunt caveat, because it would be easy to overclaim here. BlueWave does not compute these numbers for you. It carries a compliance dashboard, not a financial one, and profit per visit is a sum only you can do, because only you know your true labour and travel costs. What the system does provide is the raw material for some of them: a clean record of completed visits, what is overdue, and invoicing that goes out as work completes rather than weeks later. The contract billing turns finished visits into itemised invoices, which is the revenue-per-visit half of the profit calculation in a form you can export rather than reconstruct from memory. The costs are still yours to add. We wrote about the damage invoice lag does to cash flow separately, because slow invoicing distorts every one of these numbers.

Pick two to start. Profit per visit and renewal rate between them tell you whether today's work pays and whether tomorrow's is still coming. Get those two honest and recorded every month, and you are already ahead of most firms your size, who track turnover, feel busy, and never find out which half of the work was carrying the other.