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Which marketing channel gives you the lowest cost per customer?

Calculate your customer acquisition cost, lifetime value, and LTV:CAC ratio. Find out if your marketing spend is actually paying off.

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Marketing Metrics That Actually Matter

CAC: Know what a customer actually costs

Most food vendors undercount their CAC because they only track ad spend and forget booth fees, time spent posting, samples given out, and packaging used for promotions. A full CAC calculation includes all marketing and sales costs — both cash and time.

LTV: Your most important growth metric

LTV determines how much you can afford to spend acquiring a customer. A business with $50 LTV can outspend a competitor with $20 LTV on every channel and still be profitable. Improving LTV through repeat purchases is usually more valuable than cutting CAC.

The cheapest customer is a repeat customer

Your existing customers have a CAC of $0. Every tactic that improves repeat purchase rate — email lists, reorder reminders, seasonal menus, loyalty programs — increases LTV without touching CAC. Most food vendors underinvest here and overspend on acquisition.

Channel mix: what actually works at your scale

At under $50K/year revenue, most food vendors get the best ROI from farmers market presence (built-in foot traffic), Instagram/Facebook organic (free, compounds over time), and email lists (near-zero marginal cost per send). Paid ads rarely pencil out until you have strong LTV data and proven conversion.

Common Questions

Frequently Asked Questions

What is customer acquisition cost (CAC)?
CAC is the total marketing spend divided by the number of new customers acquired in the same period. If you spent $150 on Instagram ads this month and gained 20 new customers, your CAC is $7.50. It tells you how much it costs to bring one new customer through the door.
What is customer lifetime value (LTV)?
LTV estimates the total revenue a customer will generate over their entire relationship with your business. For a farmers market vendor with an $18 average order, 6 orders per year, and customers who stay for 2 years, the LTV would be $18 × 6 × 2 = $216.
What's a healthy LTV:CAC ratio for a food business?
A 3:1 ratio (LTV is 3× your CAC) is generally considered the minimum healthy benchmark. Below 2:1 means you're likely losing money once you account for all costs. Above 5:1 often means you're under-investing in marketing and leaving growth on the table.
What is payback period?
Payback period is how many months it takes to recover the cost of acquiring a customer through the margin that customer generates. If your CAC is $15 and a customer generates $6/month in gross margin, your payback period is 2.5 months. Shorter payback means faster cash flow.
Why is word of mouth so much cheaper than paid ads for food vendors?
Word of mouth has near-zero CAC because the cost — your time making a great product and treating customers well — is already built into your operations. A happy customer who tells two friends generates two new customers at $0 additional spend. Paid ads require ongoing budget with no guarantee of return.
How can I increase my LTV as a food vendor?
The three levers for LTV are average order value, order frequency, and customer lifespan. Practical tactics: bundle products to raise AOV, send reorder reminders via email or SMS to improve frequency, and build a loyalty program (even a simple punch card) to extend lifespan.
Should I be running paid ads for my food business?
Only if your LTV supports it. If your average customer is worth $50 over their lifetime, spending $30 to acquire them via paid ads leaves only $20 in margin before COGS — which often doesn't work. Most food vendors find farmers market presence and organic social more profitable at their scale.

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