Keeping customers is cheaper than finding new ones. And investors care about this more than you think.
There’s a stat that gets thrown around in startup circles: acquiring a new customer costs five to seven times more than keeping an existing one. The exact number varies, but the principle holds. If your customers keep leaving, no amount of growth spending will save you. You’ll be filling a bucket with a hole in the bottom.
Churn is the percentage of customers who stop using your product in a given period. Monthly churn of 5% sounds small until you realise that means you’re losing more than half your customers every year. At early stage, some churn is inevitable as you figure out your product. But if churn stays high, it’s a signal that something fundamental isn’t working.
Logo churn is the percentage of customers you lose. Revenue churn is the percentage of revenue you lose. They’re not always the same. If your smallest customers leave but your biggest ones stay and expand, your revenue churn could be low (or even negative) while your logo churn looks worse. Know both numbers and be able to explain what’s driving each one.
This is the single most valuable thing you can do for retention. When someone cancels, ask why. A short email or a two-minute exit survey will tell you more about your product’s weaknesses than any analytics dashboard. Look for patterns. If three customers in a month say “I couldn’t figure out how to do X,” that’s a product problem, not a customer problem.
Fix your onboarding. Most churn happens in the first 30 days. If a new user doesn’t see value quickly, they won’t come back. Make the path from signup to “aha moment” as short and clear as possible.
Check in proactively. Don’t wait for customers to complain. A quick email at day 7, day 30, and day 90 asking how things are going catches problems before they become cancellations.
Build feedback loops. Ask customers what’s working and what isn’t on a regular cadence. Act on what they tell you and let them know you did.
At seed stage, monthly churn above 5% for a B2B product is a concern. For consumer products, the threshold is looser, but anything above 8–10% monthly is hard to sustain. By the time you’re raising a Series A, investors want to see churn trending down and a clear explanation of what’s driving the improvement.
Early-stage startups with less than £1m ARR commonly face 5–7% monthly churn. That’s normal. What’s not normal is churn that stays at that level for more than 12 months with no improvement.
What good looks like: A founder who tracks both logo and revenue churn monthly, can explain why customers leave, has a specific plan for reducing it, and can show the trend line improving over time. “Our monthly churn was 8% six months ago. We fixed onboarding and added proactive check-ins. It’s now 4.5% and still falling.”
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Try the funding finder →This is general information, not financial or legal advice. Always do your own research and seek independent professional advice.