Tech founders are often told they need to track dozens of KPIs.
In practice, the founders who manage their numbers well track a handful, deeply, and review them often. The rest is noise.
This article covers the financial KPIs that actually drive better decisions in tech businesses between £1m and £5m turnover. There are about ten of them. Most businesses don't need all ten. Most businesses also can't tell you what theirs are.
The financial KPIs taught in MBA courses and finance training are built around traditional businesses. Gross margin. Net margin. Operating cash flow. Return on capital. They're useful but they assume a business model where revenue and cost track each other in predictable ways.
Tech businesses don't fit that pattern. A SaaS business with 80% gross margins and growing revenue can be losing money because customer acquisition cost is higher than lifetime value. A services-led tech business with strong revenue can be running out of cash because of long delivery cycles. A platform business can look healthy by traditional metrics while quietly burning capital on user acquisition that won't convert.
The result is that generic KPIs can give a false sense of security or a false sense of crisis. You need a metric set built for the way your business actually generates value.
For most tech businesses, two revenue metrics matter more than the rest.
Annual recurring revenue (ARR) or monthly recurring revenue (MRR). The total committed revenue from your customer base, projected over a year (ARR) or month (MRR). This is the headline number for most subscription businesses and the one investors will ask about first.
Net revenue retention (NRR). What percentage of last year's revenue you've retained from the same customer cohort, accounting for upgrades, downgrades, and churn. NRR over 100% means existing customers are growing, which is the strongest possible signal of product-market fit. NRR under 90% means you have a leaky bucket and growth is being eaten by churn.
If you're not a subscription business, the equivalents are committed contract revenue and customer revenue retention.
The unit economics question is whether each customer is worth more than they cost to acquire and serve.
Customer acquisition cost (CAC). What it costs you to acquire a new paying customer. Sales, marketing, the proportion of your team's time spent on conversion. If you spent £100k last quarter on marketing and sales and acquired 50 customers, your blended CAC is £2,000.
Lifetime value (LTV). The total profit a customer generates over the time they stay with you. This requires gross margin, average customer tenure, and some assumption about expansion revenue.
LTV to CAC ratio. A common rule of thumb is that LTV should be at least 3x CAC for the business to be sustainable. Below that and you're burning capital to acquire customers who can't pay it back. Well above that and you might be under-investing in growth.
CAC payback period. How many months it takes to earn back the cost of acquiring a customer through gross profit from that customer. Under 12 months is excellent. Over 24 months is a warning sign for capital-constrained businesses.
For any tech business that isn't fully self-funded, cash metrics matter.
Burn rate. Net cash leaving the business per month after all revenue is collected. Some businesses talk about gross burn (total monthly spend) and net burn (gross burn minus monthly revenue). For decision-making, net burn is the more useful number.
Runway. Cash position divided by monthly net burn. How many months you have at the current rate before you run out of money. Anything under 12 months is firefighting territory. 18 to 24 months gives you space to operate without panic.
Capital efficiency. Total capital raised divided by current ARR. Lower is better. A business with £2m ARR that raised £1m is more efficient than one with the same ARR that raised £5m.
Gross margin. Revenue minus the direct cost of delivering the product or service. For SaaS this should be 70%+, often 80%+. For services-led tech businesses it's typically lower, maybe 40% to 60%. Knowing your margin tells you whether the business model itself is viable before factoring in operating costs.
Contribution margin. Gross margin minus customer success and onboarding costs. For SaaS businesses this is often a more useful number than gross margin because it captures the real cost of serving a customer.
Tracking these numbers matters because of the conversations they drive, not because the metrics are valuable in themselves.
A sensible approach is to pick five or six of the metrics above that match your business model and review them monthly with whoever helps you on the financial side. Track the trends rather than the absolute numbers. Worry about direction more than precision in the first instance. As you get better, you can layer in more sophistication.
The mistake to avoid is producing a dashboard with thirty numbers on it that nobody reviews properly. Better to have five numbers that everyone in the leadership team can quote from memory than a comprehensive tracker that gathers dust.
If your KPIs need to stand up to investor scrutiny, the investor-ready accounts article is a good companion piece on how the underlying reporting needs to be structured.
Tech founders often track KPIs themselves until the business gets complex enough that the work starts eating their week.
The signal is usually that you can't quickly tell someone what your numbers are without going to look. Or that the numbers in your dashboard don't match the numbers in your accounts. Or that the KPIs you have are operational rather than financial, and the financial picture lives in the founder's head.
At that stage, getting someone to take ownership of the financial reporting and KPI tracking pays back quickly. Drop me a message at virtufin.co.uk if you'd like to talk about what that might look like for your business.
There's no hard sell here, just a conversation about where you are now and whether I can help.
Let's talkOr call 07899 296 552 · leigh.cooke@virtufin.co.uk