Dashboards are easy to build and easy to ignore. The businesses that actually use their numbers tend to boil it down to a short list they can recite without looking anything up — because if you have to look it up, it's not really guiding your decisions day to day.
The five
Cash in the bank, right now. Not what you expect next week — what's actually there today. Revenue this month versus the same month last year, so seasonal noise doesn't fool you into false confidence or false panic. Gross profit margin, because a growing top line hides a shrinking margin more often than owners expect. Average time it takes a customer to pay you, because that number quietly determines how much cash you need to hold. And cost per new customer, however roughly you have to estimate it, because growth that costs more to acquire than it returns isn't growth — it's a leak with good marketing.
Owners who can recite five numbers from memory make faster, calmer decisions than owners staring at a forty-tab spreadsheet.
Why these five specifically
Each one is chosen because it answers a different question a growing business actually asks itself week to week. Cash tells you whether you're safe right now. Revenue year-on-year tells you whether the business is genuinely growing or just having a good month. Margin tells you whether growth is healthy or hollow. Payment speed tells you how much of a buffer you need to hold. Acquisition cost tells you whether your growth is actually affordable. Between them, they cover the questions that most commonly catch owners out — leaving nothing out that matters and nothing in that doesn't.
Why five and not fifty
More metrics feel like more control. In practice they usually produce less action, because nothing stands out clearly enough to act on. Five numbers, checked consistently, beat fifty numbers checked once and forgotten. Start there, and only add more once these five are second nature.
There's a specific trap worth naming: building an elaborate dashboard is often procrastination dressed up as diligence. It feels productive to spend an afternoon building fifteen charts. It rarely changes a single decision, because fifteen charts don't fit in your head the way five numbers do, and decisions get made from what's in your head, not from what's technically available in a spreadsheet somewhere.
A worked example
Take a small service business — say a five-person marketing agency. Cash in the bank today is comfortably above a typical month of costs, so there's no immediate panic even though it's not a huge buffer. Revenue this month is well up on the same month last year — genuine growth, not just a good month riding on a seasonal bump, because the year-on-year comparison strips that noise out. Gross margin has drifted down a few points over the last quarter, which the top-line growth alone would never reveal — something in delivery costs or pricing has quietly shifted, and it's worth a proper look before it drifts further. Average payment time has crept up noticeably, which explains why cash feels tighter than the revenue growth alone would suggest. And cost per new client has risen too, still comfortably profitable against the value of a typical client, but a trend worth watching rather than ignoring.
The sixth number, for some businesses
Five is the right number for most businesses to hold in their head, but a handful of business types genuinely need a sixth, specific to how they make money. A business with physical stock needs to know its stock turn — how many times inventory is sold and replaced over a year — because cash tied up in slow-moving stock is cash that isn't available for anything else. A subscription or membership business needs churn, the percentage of customers who leave each month, because a leaking bucket can hide behind decent new-customer numbers for a surprisingly long time before the leak becomes visible in the totals. Know which category your business falls into, and treat that sixth number with the same discipline as the other five — not bolted on as an afterthought, but genuinely checked on the same schedule.
How to actually build the habit
Write the five numbers somewhere you'll genuinely see weekly — a notebook, a whiteboard, a recurring calendar note, whatever actually gets looked at rather than filed away. Update them on the same day each week. Within a couple of months you'll find you don't need to look them up any more; you'll simply know them, the same way you know how much is in your personal current account without checking the app every time. That's the point at which they start actually shaping decisions in real time, rather than being a report you review after the fact.
What to do this week
You don't need perfect numbers to start — a roughly right cost-per-customer figure this week is worth more than a precisely calculated one you never get round to producing. Pull together your best current estimate of all five (or six) numbers today, write them somewhere you'll see weekly, and commit to updating them on the same day each week for the next month. By the fourth update you'll already notice which ones move more than you expected, and that's usually the first sign of exactly the kind of thing this habit is designed to catch early.
Common questions
How often should I actually check these five numbers?
Weekly for cash, monthly for the other four. Cash moves every day and is the only one of the five that can actually end the business, so a quick look each week — same day, same routine — catches a problem while it is still fixable. Revenue year-on-year, gross margin, payment speed and acquisition cost all move too slowly for a weekly check to tell you anything new; monthly is the right rhythm, and quarterly is enough for acquisition cost in a business that does little advertising. The point of the routine is not the reading, it is the memorising. After two or three months in the same weekly slot you will know the numbers without looking them up, which is the point at which they start changing decisions rather than describing them.
How do I calculate my gross profit margin?
Take your revenue, subtract the direct costs of delivering it, divide by revenue and multiply by 100. Direct costs are the ones that rise when you sell more — materials, stock, subcontractors, staff time booked to the job, card fees. Rent, software, insurance and your own salary are overheads, so they stay out of this particular calculation. A worked version: £20,000 of sales in a month against £12,000 of materials and subcontractors leaves £8,000 of gross profit, and £8,000 divided by £20,000 is 40%. The absolute figure matters less than the direction of travel. If margin drifts from 40% to 34% over two quarters while revenue grows, you are working harder for the same money — which is exactly what a revenue-only view hides.
What counts as customer acquisition cost — everything, or just the ad spend?
Everything you spend to win a customer, not just advertising. Add up what went into getting new business over a period — ads, referral fees or commission, the cost of time your team spent pitching and writing proposals, any tool bought purely for sales and marketing — then divide by the number of new customers won in that same period. Most owners undercount badly by leaving out their own time, which in a small business is usually the largest single input. Put a rough hourly value on it rather than treating it as free. The figure only becomes useful alongside two others: what a customer is worth to you over the whole relationship, and how many months of their spending it takes to earn the acquisition cost back.
How do I work out how long customers take to pay me?
Take the total your customers owe you right now, divide it by your sales for the last 90 days, then multiply by 90. That gives you debtor days — the average gap between raising an invoice and the money landing. A business owed £30,000 with £90,000 of sales in the last quarter is running at 30 debtor days. Now compare that with the payment terms printed on your invoices. If your terms say 14 days and your debtor days say 38, the terms are decorative and you are running an unfunded loan to your customers. That gap, rather than the headline number, is what tells you how large a cash buffer the business actually needs to hold to stay comfortable.
What if the numbers tell me something I don't want to see?
Then you have just found the reason to track them. The most common unwelcome discovery is that a growing business is making less gross profit per pound of sales than it did a year ago — meaning the growth is being bought rather than earned. The instinct is to chase more revenue to cover the gap, and that usually makes things worse, because you are scaling the thing that leaks. Fix the margin first: reprice work that has quietly drifted, renegotiate or drop the jobs that consistently come in under, and check whether a supplier increase from months ago was ever passed on. A number that makes you uncomfortable in month one is far cheaper than the same number found in month eighteen.
