Ad Budget Calculator
Work backward from revenue goals — not guesswork
Ad Budget Calculator
Stop Picking Arbitrary Budgets
Too many businesses pick $500, $1,000 or $5,000 and hope for the best. This calculator forces you to work backward from your actual revenue goals so every dollar has a clear purpose.
1 Your Inputs
What revenue do you want this campaign to generate?
Typical first purchase amount
% of qualified leads that become customers
How much can you profitably pay for a qualified lead?
Total revenue one customer generates over time
Your Campaign Math
Customers Needed
10
to hit revenue goal
Qualified Leads Needed
40
at your close rate
Recommended Ad Budget
$6,000
40 leads × $150 CPL
CAC
$600
Cost to acquire 1 customer
First-Sale ROAS
5.0x
Revenue ÷ Ad Spend
LTV:CAC
30:1
Lifetime value ratio
Excellent Investment Potential
Spending $600 to acquire a customer worth $18,000 lifetime is outstanding. Most businesses would gladly do this all day.
Campaign Funnel
The 5 Steps Behind the Numbers
Start with a realistic monthly revenue target from your campaign.
Example: Monthly revenue goal = $30,000
Average sale = $3,000
You need: $30,000 ÷ $3,000 = 10 new customers
Now you know the campaign must generate 10 customers — not simply “more leads.”
Determine what percentage of qualified leads typically become customers.
Close rate: 25%
To gain 10 customers: 10 ÷ 25% = 40 qualified leads
Your advertising campaign now has a measurable objective: Generate 40 qualified leads.
How much can you afford to pay for each lead?
You can profitably spend: $150 per qualified lead
Advertising budget = 40 leads × $150 = $6,000
Now your budget is based on math — not guesswork.
Customer Acquisition Cost measures what it costs to acquire one paying customer.
Formula: Advertising Spend ÷ New Customers = CAC
Spend: $6,000 | Customers: 10
CAC = $600
If each customer generates $3,000 in revenue with healthy margins, that may be an excellent investment.
This is the metric many small businesses overlook.
If your average customer buys repeatedly over several years, your advertising can be significantly more aggressive.
Initial sale: $3,000
Average lifetime revenue: $18,000
Would you spend $600 to acquire an $18,000 customer?
Most businesses gladly would.
Metrics Every Business Should Track
At a minimum, monitor these numbers. If you aren’t measuring them, you’re managing advertising with incomplete information.
Monthly Ad Spend
Total dollars put into paid campaigns
Impressions
How many times your ads were shown
Click-Through Rate (CTR)
% of impressions that became clicks
Cost Per Click (CPC)
Average amount paid per click
Landing Page Conv. Rate
% of visitors who become leads
Cost Per Lead (CPL)
Ad spend ÷ number of leads
# of Qualified Leads
Leads that meet your ideal criteria
Sales Close Rate
% of leads that become customers
Customer Acquisition Cost
Total spend ÷ new customers
Average Sale Value
Revenue per new customer (first sale)
Customer Lifetime Value
Total revenue from a customer over time
Return on Ad Spend (ROAS)
Revenue generated ÷ advertising spend
A Simple End-to-End Example
Revenue Goal
$50,000
Avg Sale
$5,000
Close Rate
20%
Target CPL
$120
Customers Needed
10
Leads Needed
50
Ad Budget
$6,000
With CAC of $600, first sale of $5,000 and lifetime value of $20,000 — that campaign has the potential to generate an outstanding return.