When you’re driving your car, you don’t need to understand how the engine works.
You simply keep an eye on the dashboard.
If the fuel light comes on, you fill up.
If the engine warning light flashes, you know something needs your attention.
Running your business should be the same.
You don’t need pages of complicated reports or dozens of financial ratios. You just need a handful of key numbers that tell you whether your business is healthy or whether it’s time to take action.
Here are the five financial warning lights I recommend every business owner check each month.
1.Gross Profit Margin
This tells you how much money you’re making before paying your overheads such as rent, wages and insurance.
How do I calculate it?
Sales = £100,000
Less direct costs (materials, stock, subcontractors etc.) = £60,000
Gross Profit = £40,000
Gross Profit Margin = Gross Profit / Sales x 100
£40,000 / £100,000 x 100 = 40%
This means that for every £1 you sell, you keep 40p towards paying your overheads and making a profit.
If your gross profit margin suddenly falls from 40% to 35%, that’s an early warning sign that something has changed.
Perhaps your suppliers have increased their prices, you’re discounting too much, or jobs are taking longer than expected.
2.Net Profit Margin
This is one of my favourite financial health checks that tells you how much profit your business actually keeps after all of its costs have been paid.
How do I calculate it?
Using the same example:
Sales = £100,000
Net Profit = £15,000
Net Profit Margin = Net Profit / Sales x 100
£15,000 / £100,000 x 100 = 15%
So for every £1 of sales, your business keeps 15p as profit.
This is the money that can be used to pay you, invest back into the business or build up cash reserves.
Don’t get too hung up on what everyone else’s profit margin is. Every industry is different.
The important thing is to monitor your margin every month. If it’s heading in the right direction, fantastic. If it’s falling, it’s time to find out why.
3.Cash in the Bank
Profit is important.
Cash pays the wages, suppliers and tax bills.
Even profitable businesses can get into trouble if they don’t keep an eye on their cash position.
One quick glance at your bank balance, together with the bills due over the next few weeks, can save a lot of sleepless nights.
4.Can you pay your bills? (Current Ratio)
This sounds technical, but it’s actually answering one very simple question:
If all of your bills became due tomorrow, could your business pay them?
To calculate it:
Current Assets (cash, money customers and stock owe you)
divided by
Current Liabilities (payments due within the next 12 months)
Example
Current Assets = £80,000
Current Liabilities = £40,000
Current Ratio = 2.0
This means that for every £1 your business owes, it has £2 of assets available to pay it.
As a very general guide:
🟢 Above 1.5 – Healthy
🟡 Around 1 – Worth keeping an eye on
🔴 Below 1 – A warning light that your business could struggle to pay its bills as they fall due.
Don’t panic if yours isn’t perfect. Some industries naturally operate with lower ratios than others. The important thing is to watch the trend over time.
5.How long are customers taking to pay? (Debtor Days)
You may have agreed 30-day payment terms with your customers…
…but are they actually paying within 30 days?
Debtor Days tells you how long, on average, customers take to pay their invoices.
Example
Money owed by customers = £30,000
Annual sales = £360,000
Debtor Days = (£30,000 / £360,000) x 365 = 30 days
So, on average, customers are paying after 30 days.
If that starts creeping up to 45 or even 60 days, your cash flow can come under pressure very quickly.
A simple monthly check gives you a chance to chase overdue invoices before they become a much bigger problem.
Your Numbers Should Help You Make Decisions
The biggest mistake I see is business owners only looking at their accounts at year-end.
Your numbers should be helping you make better decisions every single month.
If your gross profit margin falls, ask why.
If your net profit margin is shrinking, review your overheads.
If your current ratio drops, keep a closer eye on cash.
If debtor days increase, start chasing invoices sooner.
Your numbers aren’t there to frighten you.
They’re there to help you spot small issues before they become expensive problems.
Our Tip…
Spend just 10 minutes each month checking these five financial warning lights, and you’ll be amazed how much more confident you’ll feel about running your business.
Would you like to know what your business dashboard is telling you?
If you’d like us to review these five financial warning lights with you and explain what they mean for your business, just get in touch. A 30-minute review could highlight opportunities (or warning signs) that you might otherwise miss.