Insights — Customer Expansion & Account Growth — 3 min read
Is It Cheaper to Keep a Customer Than Find a New One?
The old cliché says it is five times cheaper to retain a customer than to find a new one. In B2B, that number is rarely accurate. Here is how to find your own ratio.
In short
There is no universal ratio for retention vs acquisition costs. To understand your own business, you must compare your Customer Acquisition Cost (CAC) — the total spend on marketing and sales to win a new logo — against your Customer Retention Cost (CRC) — the spend on account management, support and loyalty programmes required to prevent churn.
You have likely heard the statistic: 'It is 5 times cheaper to keep a customer than to acquire a new one.' Some sources even claim it's 25 times. The reality in B2B is that these universal ratios are largely invented. The cost of retention vs acquisition varies wildly depending on your industry, sales cycle and service model.
For some businesses, retention is indeed significantly cheaper. For others, particularly those in high-maintenance technical sectors, 'keeping' a customer can be incredibly expensive.
Why the '5x' Rule is Flawed
The '5x' rule assumes that retention is a passive activity that happens automatically if you provide a good service. In B2B, retention is an active, ongoing cost. You have account managers, technical support teams, renewal negotiations, and customer success programmes. If you aren't tracking these costs, you are likely underestimating what it costs to 'keep' a client.
How to Calculate Your Own Ratio
To find your true cost balance, calculate these two figures for the last 12 months:
- Customer Acquisition Cost (CAC): (Total Sales & Marketing Spend) ÷ (Number of New Customers Won). Include salaries, ad spend, and commissions.
- Customer Retention Cost (CRC): (Total Account Management & Support Spend) ÷ (Total Number of Active Customers). Include the time spent by senior leadership on 'at-risk' accounts.
Once you have these, you can see your own ratio. If your CAC is £10,000 and your CRC is £2,000, then for you, retention is indeed 5 times cheaper.
The Hidden Cost: Customer Expansion (CEC)
There is a third figure often missed: the cost to *expand* a customer. This usually sits somewhere between the two. Growing an existing account often requires less trust-building than a new one, but it still requires commercial effort.
Where should you invest?
If your CAC is rising and your market is saturated, shifting budget into Retention and Expansion is the logical commercial move. If your CRC is high but your churn is still high, you have a service delivery problem that no amount of account management will fix.
Evans Customer Expansion Engine focuses on the most efficient middle ground: Expansion. By identifying where spend could grow without the full cost of new acquisition, we help you improve your overall commercial ROI. Intelligence is £695 + VAT/month.
More revenue may already be inside your customer base.
Customer Expansion Engine analyses the customers you already have for cross-sell, upsell, renewal, reactivation and additional-site opportunities — each one explained, prioritised and approved by people before anyone makes contact. From £695 + VAT per month.
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