Marketing Strategy
How to Set Your Marketing Budget as a Small Business (The Simple Method)
Most small business owners either throw money at marketing without a plan and wonder why it doesn't work, or avoid spending anything and wonder why they can't grow. Both are mistakes rooted in the same problem: no system for deciding what marketing is worth. Here's the simple method that gives you a defensible number — and tells you how to allocate it.
Forget the generic advice to "spend 7–10% of revenue on marketing." That number comes from large consumer brands with established customer bases and brand recognition. A local service business that's been open for three years needs a different framework — one based on the economics of your specific business and what it actually costs to acquire a customer.
Step 1: Know Your Customer Acquisition Economics
Calculate your average job value and gross margin
Before you can decide how much to spend on marketing, you need to know how much a new customer is worth to you. Average job value: total revenue over the last 3 months ÷ number of jobs completed. Gross margin: what's left after paying your direct costs (materials, labor, subcontractors) — not your overhead. If your average job is $400 and your direct costs are $160, your gross margin per job is $240 (60%). This gross margin is what you have to work with for overhead, profit, and marketing. Most local service businesses run 40–65% gross margins. Know yours before setting a marketing budget.
Set your maximum allowable cost per acquired customer
A simple rule: your customer acquisition cost (CAC) should not exceed 20–33% of your average first-job gross margin. Example: Average job value = $400. Gross margin = 60% = $240 margin per job. 20–33% of $240 = $48–$79 maximum CAC. That means you can spend up to $48–$79 to acquire each new customer and still be profitable on the first transaction. If your customer lifetime value is high (they book again every year), you can afford to go higher. If it's a one-time purchase, stay at the low end. This number is your marketing efficiency benchmark — every channel you use should be measured against it.
Step 2: Set Your Monthly Marketing Budget
Use the revenue-percentage method as a starting point
Now you can use a percentage of revenue — but it should be informed by your growth goals, not a generic benchmark. Here's the framework: Maintenance mode (stable, not trying to grow fast): 3–5% of monthly revenue. You're investing just enough to stay visible and hold your market position. Growth mode (want to increase revenue 20–30% in the next 12 months): 7–12% of monthly revenue. You're investing aggressively in channels with a proven return. Launch mode (new business or entering a new market): 12–20% of revenue, sometimes more. You're buying market share before organic channels kick in. Be honest about which mode you're in. Spending growth-mode budgets while in maintenance-mode thinking produces mediocre results from under-invested campaigns.
Example calculation: Landscaping company doing $12,000/month in revenue, in growth mode. 10% marketing budget = $1,200/month. Average job value = $500. Target CAC = $75–100. $1,200 budget ÷ $87 average CAC = 13–14 new customers per month needed to break even on the marketing investment. Is that realistic? That's the next question to answer before committing the budget.
Step 3: Allocate Your Budget by Channel Priority
Tier 1 — Foundation (free or near-free, high ROI): Fund these first
Before spending on paid advertising, maximize your free channels. These include your Google Business Profile (fully optimized, weekly posts, active review requests), your website (should be functional and fast — if it's not, fix it before running ads), organic social media (one platform, consistent posting), and your referral system (personal asks to happy customers). These channels are time investments, not money investments. If you're spending $500/month on Facebook ads but your GBP has 4 reviews and your website loads slowly on mobile, you're advertising into a leaky bucket. Fix the foundation first.
Tier 2 — Proven paid channels: Allocate 60–70% of your paid budget here
Once your foundation is solid, paid advertising amplifies what's already working. For most local service businesses, this means Google Local Services Ads (for immediate-need services) or Google Search Ads. These are intent-based — you're paying to show up when someone is actively looking for what you offer. LSAs are typically the most cost-efficient starting point because you pay per lead, not per click, and Google's "Guaranteed" badge builds trust. Put the majority of your paid budget here until you've proven the channel works and know your true CAC from it.
Tier 3 — Experimental channels: Allocate 20–30% to test new approaches
Once your proven channels are funded, allocate a smaller portion to testing. This might be Facebook or Instagram ads, Nextdoor ads, direct mail in a specific neighborhood, or Yelp ads. Run each test for 60–90 days with a fixed budget. If the CAC is within your target, scale it. If it's not, cut it and try something else. The key is to treat these as experiments with a defined budget and a clear success metric — not as open-ended spending that you evaluate emotionally. Most businesses find 2–3 channels that work for them specifically, and those become the majority of their budget over time.
Step 4: Review and Adjust Quarterly
Review your CAC by channel every 90 days and reallocate accordingly
Your marketing budget isn't a set-and-forget decision. Every quarter, pull your numbers: how many new customers came from each channel, and what did each cost? Channels producing customers below your target CAC get more budget. Channels producing customers above it get cut or restructured. This is the discipline that separates businesses that get better at marketing over time from ones that keep spending on the same things and wondering why nothing improves. Even one hour per quarter reviewing these numbers will put you ahead of 90% of your competitors, who are either not tracking anything or only looking at vanity metrics like Instagram followers and website traffic.
What a Realistic Monthly Marketing Budget Looks Like
Here's a practical budget example for a plumbing company doing $25,000/month in revenue, in growth mode at 8%:
- Total marketing budget: $2,000/month
- Website hosting + maintenance: $150
- Google Local Services Ads: $900 (primary paid channel)
- Google Search Ads (secondary): $500
- Facebook Ads (testing): $300
- Email marketing tool: $50
- Free channels: GBP maintenance, social posting, review requests (time only)
This budget is specific, intentional, and allocates the most money to the channel most likely to produce immediate-need plumbing calls. It leaves room to test Facebook while funding the proven channel heavily. Every dollar has a purpose and a benchmark to be measured against.
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