A marketing budget is defensible when you can explain where every dollar goes and what it's expected to return. The way to get there is to work backwards: find out what a customer is worth to you, set a ceiling on what you'll pay to win one, and multiply by the number of new customers you actually need. Habit, competitor-watching and sales-rep suggestions all skip those steps, which is why so many small-business budgets feel like guesswork.
This guide walks through the method with an illustrative example. Swap in your own numbers as you go.
Step 1: Work out what a customer is worth over 12 months
Answer first: a customer's value is the gross profit they bring in over a year, not the size of their first purchase.
You need three figures from your sales records:
- Average sale. Total revenue divided by number of transactions.
- Purchases per customer per year. How many times a typical customer buys from you in 12 months.
- Gross margin. The share of each sale left after direct costs.
Example. A Coquitlam bakery-café has an average sale of $18, a typical regular visits 20 times a year, and the gross margin is 60%.
- Annual revenue per customer: $18 × 20 = $360.
- Annual gross profit per customer: $360 × 0.60 = $216.
A home-service business would look very different: perhaps one $2,500 job a year at a 40% margin, or $1,000 in gross profit per customer. Neither is better; they simply lead to very different budgets.
Step 2: Set a ceiling on the cost to win a customer
Answer first: decide in advance the most you'll pay in marketing to win one new customer, and stick to it.
A cautious starting point is to spend no more than a third of first-year gross profit on winning a customer. That leaves room for overheads and profit, and it's easy to adjust once you have real data.
- Bakery-café: $216 ÷ 3 = $72 per new regular.
- Home-service business: $1,000 ÷ 3 = about $333 per new customer.
This isn't a universal rule. If customers stay for many years, or refer others, you can justify a higher ceiling. If your cash is tight, go lower. The important thing is to have a number before you spend.
Step 3: Decide how many new customers you need
Answer first: your budget should follow your growth target, not the other way round.
Ask: how many new customers a month do I need to meet my goal, after allowing for the customers I'll lose naturally?
Example. The bakery-café has about 400 regulars and loses roughly 10 a month as people move or change habits. The owner wants to reach 500 regulars within a year.
- Replacement: 10 a month.
- Growth: 100 extra over 12 months, or about 8 a month.
- Total: about 18 new regulars a month.
Step 4: Multiply to get the budget
Answer first: monthly budget = new customers needed × ceiling cost per customer.
- Bakery-café: 18 × $72 = about $1,300 a month.
That's your starting budget, and you can now explain it to anyone. If $1,300 a month feels too high for your cash flow, you have three choices, and each one is visible: accept slower growth, find cheaper ways to win customers (referrals, partnerships), or raise customer value (a loyalty offer, a higher-margin product).
Step 5: Split the budget between proven channels and tests
Answer first: put most of the money where you already know customers come from, and a small, fixed share into tests.
A simple split:
- About 80% to proven channels. Whatever your records say brings customers today: perhaps your Google Business Profile, local search, referrals or a community partnership.
- About 20% to tests. One or two new ideas at a time, each with a fixed budget, a fixed period (often 60 to 90 days) and a number that decides whether it continues.
Example test. The bakery-café sets aside $260 a month for 90 days to test materials aimed at nearby office workers. That is $780 in total, so unless it wins at least 11 new regulars, keeping the cost at or under $72 each, the test stops.
Step 6: Think about language and neighbourhood
Answer first: in Coquitlam, who you're marketing to and in which language is a budget question, not just a creative one.
The City's demographic figures show a population with many households whose first language is neither English nor French, with Mandarin, Korean, Cantonese and Persian among the most common. If your customer records show that a significant share of your customers speak one of those languages, it may be worth funding material in that language. If you do:
- have a fluent speaker check everything before it's published;
- make sure whoever answers the phone or messages can respond appropriately, or say clearly which languages you serve in;
- measure results separately so you know whether the spend works.
Neighbourhood matters too. A business near Burquitlam or Coquitlam Central stations may get much of its trade from people passing by; a business serving Westwood Plateau or Burke Mountain may need to reach households directly. The areas page discusses each part of the city.
Step 7: Build a monthly scorecard
Answer first: track four to six numbers every month, and nothing else until those are steady.
| Measure | What it tells you |
|---|---|
| New customers this month | Whether you're on track for the target |
| Marketing spend this month | Whether you stayed within budget |
| Cost per new customer, by channel | Which channels are under the ceiling |
| Enquiries to customers (%) | Whether the problem is marketing or follow-up |
| Customers lost this month | Whether retention needs attention |
Keep it in a simple spreadsheet and update it on the same day each month. A scorecard you actually look at is worth more than a sophisticated dashboard you don't.
Common mistakes
- Budgeting from revenue percentages without checking against customer value.
- Ignoring follow-up. If half your enquiries never hear back, more marketing just produces more lost enquiries. Fix response times first.
- Changing everything every month. Give each channel enough time to show a pattern before judging it.
- Measuring visits and likes instead of customers and cost per customer.
- Funding too many channels. Two channels funded properly usually beat six funded thinly.
- Forgetting the cost of your own time. If you spend five hours a week on social posts, that's part of the budget too.
When to get help
If you work through these steps and the budget makes sense, you're ahead of most small businesses. If the numbers don't add up, or you're not sure which channels deserve the money, our marketing strategy and budget service builds the full plan with you. For a quick second opinion on an agency proposal or a budget you've drafted, book an hourly strategy session. Our results page shows how the same customer-value thinking played out in our HVAC work. Call, text or email when you're ready.
Frequently asked questions
Isn't a percentage of revenue the standard way to set a budget?
It's common, but it's a guess dressed up as a rule. It doesn't account for your margins, your customer value or how many customers you actually need. Working from customer value gives you a figure you can test.
What if I don't know where my customers come from?
Start asking. For the next 60 days, ask every new customer how they heard about you and record the answer. Even rough data beats none.
How often should I change the budget?
Review it monthly and change it quarterly. Monthly changes are usually reactions to noise; quarterly reviews give each channel enough time to show a pattern.
Sources
- City of Coquitlam: Demographic Statistics (2026-10-23)