A first advertising budget needs to be large enough to produce a readable result and committed for long enough to become efficient. Below a certain point you are buying data too thin to interpret, which is the worst of both outcomes: money spent and nothing learned.
The two numbers that matter
Not the monthly figure on its own. A budget is a rate and a duration, and the duration is the part people leave out.
Advertising systems need a volume of clicks before their targeting settles, and you need a volume of enquiries before the cost per enquiry means anything. A budget spread thinly over one month produces neither. The same total concentrated over three months on fewer terms produces both.
So the question is not what can I afford monthly, it is what can I commit for three months to a narrow enough target to learn something.
Working out the ceiling
Before choosing an amount, establish what an enquiry is worth, which is the same arithmetic behind whether search advertising suits your business at all. This takes ten minutes and it turns the whole exercise from a guess into arithmetic.
- Gross margin on an average customer. Not revenue, margin.
- What share of it you will trade for growth, commonly a fifth to a third.
- Your close rate on enquiries, meaning how many become work.
A business with $2,000 margin per customer, willing to spend a quarter, can afford $500 per customer won. Closing one enquiry in four means $125 per enquiry is break-even against that ceiling. That figure is what every later report gets judged against, and having it in advance is what stops a campaign being cancelled or continued on feel.
The minimum that produces a readable result
Rather than a dollar figure, which varies too much by trade, think in clicks.
You need roughly thirty to fifty enquiries before a cost per enquiry is stable rather than noise. At a typical conversion rate that implies several hundred clicks. Multiply by the click price in your category and you have a realistic minimum for a three-month test.
If that number is uncomfortable, the correct response is to narrow the target rather than reduce the budget. One service, one area, the highest-intent terms only. A small budget spent narrowly produces a clear answer about that narrow thing. The same budget spread across everything produces an unreadable smear.
Structuring it
Set the daily rate deliberately
Most platforms work on a daily budget and will spend more on some days and less on others, averaging out over the month. Divide your monthly figure by thirty and expect variation around it.
Concentrate rather than distribute
The instinct is to split the budget across every service so nothing is neglected. That produces several campaigns, each too small to leave the learning phase. One properly funded campaign beats four starved ones every time.
Do not run overnight if nobody answers
Clicks at two in the morning cost the same and convert worse when the callback happens eleven hours later. Restricting hours to when someone can respond is frequently the single largest efficiency gain available at a small budget.
Set the location tightly
Default radius settings routinely reach further than a trades business will travel. Every click from outside your area is money spent on a job you would decline.
What to expect the money to do
| Month | What the budget is buying |
|---|---|
| One | Mostly learning. Expect waste, expect to add exclusions weekly, expect the cost per enquiry to look bad |
| Two | Efficiency improving as unwanted terms are excluded and targeting settles |
| Three | A figure you can judge, and enough enquiries to trust it |
Cancelling in month one because the cost per enquiry looked poor is the most common way a first budget is wasted, because the money bought the learning and then the learning was discarded.
When to increase, and when to stop
Increase when the cost per enquiry is comfortably below your ceiling and you have capacity for more work. Both conditions matter; scaling a campaign when you cannot service the result creates a scheduling problem and a reputation risk.
Stop when the cost per enquiry sits above your ceiling after three months of proper management, and the reason is structural rather than fixable. That is a legitimate finding rather than a failure, and it is worth considerably more than continuing indefinitely on the assumption that it will improve.
The budget item people forget
Managing it. Whether that is your hours or someone else's, a campaign left unattended drifts, because platforms expand targeting by default and unwanted terms accumulate.
An unmanaged campaign at any budget wastes a meaningful share of it. Factoring that in from the start produces a realistic total and prevents the common outcome, which is a campaign that ran for eight months and was reviewed twice.
Frequently asked questions
How much should a small business spend on advertising to start?
Enough to generate thirty to fifty enquiries over three months, which is what makes a cost per enquiry readable. If that figure is uncomfortable, narrow the targeting rather than reducing the budget.
How long should I commit before judging it?
Three months. The first month is largely the system learning and you paying for it, the second is efficiency improving, and the third gives a figure with enough enquiries behind it to trust.
What is a reasonable cost per enquiry?
Whatever sits below the ceiling set by your own margin. Take gross margin per customer, decide what share you will trade for growth, and divide by your close rate on enquiries.
Should I split the budget across all my services?
No. Several starved campaigns each stay in the learning phase indefinitely. One properly funded campaign on your highest-value service produces a clear answer.
Should ads run overnight?
Not if nobody can respond. Clicks at two in the morning cost the same and convert far worse when the callback happens eleven hours later, so restricting hours is often the largest efficiency gain at a small budget.
When should I increase the budget?
When the cost per enquiry is comfortably below your ceiling and you have the capacity to service more work. Scaling without capacity creates a scheduling problem and a reputation risk.
West Coast Media Solutions Inc. provides web design, web development, hosting, digital marketing, and business consulting to organisations across Canada, drawing on more than twenty-five years in the field.
Working out what to commit to advertising?
We calculate the ceiling from your own margins first, then structure the budget so three months produces an answer rather than a guess.
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