Marketing Spend Calculator

Marketing Spend Calculator

A strategic framework for determining your optimal marketing investment. Work backwards from customer value to establish a data-driven marketing budget.

1 Step One

Customer Lifetime Value

Calculate the total value a customer brings over their lifetime or the next 2-3 years. This foundational metric drives all subsequent marketing decisions.

Consider repeat purchases, referrals, and upsell opportunities
£
2 Step Two

Determining Acquisition Cost

Establish how much you're willing to invest to acquire each customer. A common rule of thumb is spending no more than one-third of the customer's lifetime value.

Recommended: 20-33% to maintain healthy profit margins
33%
Maximum Cost Per Customer £990
3 Step Three

Lead-to-Customer Conversion

Understanding your conversion ratio is crucial. How many leads do you need to generate in order to win one customer?

e.g. if you close 1 in 3 qualified leads, enter 3
leads per customer
Maximum Cost Per Lead £330
4 Step Four

Setting Growth Targets

Define your desired number of new customers for the coming month. This target should align with your business capacity, market conditions, and strategic objectives.

new customers / month
5 Step Five

Lead Volume Requirements

Calculate the total leads needed and add a contingency buffer to account for unexpected variations in lead quality and conversion rates.

Recommended: 10-20% to account for quality variations
15%
Base Leads Needed 30
Buffer Leads +5
Total Leads Required 35
Results

Total Marketing Investment

Your data-driven monthly marketing budget based on customer value, conversion metrics, and growth targets.

Max Cost / Customer
£990
Max Cost / Lead
£330
Total Leads Needed
35
Recommended Monthly Marketing Budget
£11,550
Based on 35 leads at £330 max per lead

Key Takeaway

This calculator transforms marketing from guesswork into a predictable, scalable system. By working backwards from customer value, you ensure every pound spent contributes to profitable growth. Review and refine these metrics monthly to maintain marketing efficiency.