Free tool
CAC Calculator
Add up everything you spend winning customers in a month, divide it by the customers you actually won, and see whether the numbers stack up against their lifetime value.
Monthly sales & marketing costs
Google, Meta, LinkedIn, sponsorships, affiliate payouts.
Include your own time if you do the selling.
CRM, email, SEO, analytics, landing pages.
Not sure? Work it out with the LTV calculator.
Customer acquisition cost
£117.50
- Total monthly spend
- £4,700
- LTV : CAC ratio
- 7.7 : 1
Paid-only CAC
£62.50
Profit per customer
£783
Payback period
1.6 months
New customers
40
Healthy — you're earning back more than three times what you spend.
A 3:1 LTV to CAC ratio is the usual benchmark for a subscription business. Below 1:1 you're paying for the privilege of having customers; far above 5:1 often means you could afford to grow faster.
CAC = all sales and marketing costs ÷ new customers won in the same period. Keep the two in the same month, and include your own time — it's the cost people forget.
Add up advertising, salaries, software and agency fees for the month, divide by the customers you actually won, and see your true customer acquisition cost. Includes a paid-only CAC, the LTV to CAC ratio and a payback period so you can tell quickly whether growth is paying for itself.
Software that brings your acquisition cost down
Cheaper customers usually come from better tracking, better organic reach and less manual follow-up. Pulled live from our software directory.
CRM & pipeline
CloseA fast, built-for-sales CRM with calling, email and automation included.
KeapSales and marketing automation with CRM for service-based small businesses.
ActiveCampaignEmail marketing, automation and CRM in one platform for growing businesses.
BrevoEmail, SMS, chat and CRM in one affordable customer relationship platform.Analytics & attribution
Email & automation
SEO & organic growth
SEO PowerSuiteDesktop SEO toolkit covering audits, rankings, backlinks and outreach.
SeobilityAll-in-one SEO suite with crawling, audits, rank tracking and backlink data.
SEOprofilerAll-in-one SEO platform for agencies and in-house marketing teams.
NightwatchAI-ready SEO rank tracking and monitoring for any location or search engine.