How Much Should a Small Business Spend on Advertising?
Rules of thumb say 5–10% of revenue, but the best budget comes from your numbers: customer value, acquisition cost and growth goals. Here's a simple method with examples.
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Short answer: a common rule of thumb is 5–10% of revenue for marketing, with new or fast-growing businesses spending more. Gartner's 2025 CMO Spend Survey found large companies spend 7.7% of revenue on average, and half spend 6% or less. But the most reliable budget comes from your own numbers: how many customers you need, what each customer is worth, and how much you can afford to pay to win one.
Below is a simple goal-based method with worked examples, plus how to split budget across channels. If you'd like a plan built for your business, see our full-service growth service.
Method 1: Percentage of revenue (quick but blunt)
Percentage rules are easy to apply:
| Situation | Typical marketing spend |
|---|---|
| Established business, steady referrals | ~2–5% of revenue |
| Typical growing small business | ~5–10% of revenue |
| New business or aggressive growth | 10–20%+ of revenue (often temporarily) |
The weakness: a percentage ignores your margins, your customers' value and how competitive your market is. A business with 70% gross margins can afford to spend far more per customer than one with 15%.
Method 2: Work backwards from goals (recommended)
Step 1: Know what a customer is worth
Calculate lifetime gross profit per customer: average order value × gross margin × number of purchases over a realistic period. This is your lifetime value (LTV).
Step 2: Decide what you can pay to acquire one
Your target customer acquisition cost (CAC) must leave room for profit. Many businesses aim for LTV at least three times CAC, and a payback period they can fund (for example, recovering acquisition cost within the first purchase, or within a few months for subscriptions).
Step 3: Set a customer target
How many new customers per month do you need to hit your revenue goal?
Step 4: Calculate the budget
Monthly acquisition budget ≈ new customers needed × target CAC
Then split it into ad spend, production and people.
Worked examples
These are illustrative figures; use your own.
Local service business (e.g. a plumbing company)
- Average job gross profit: $350; repeat and referral value brings LTV to ~$700
- Target CAC: $150
- New customers needed per month: 30
- Acquisition budget: 30 × $150 = $4,500/month
- Split: ~$3,000 Google Ads / Local Services Ads, ~$1,000 SEO and Google Business Profile work, ~$500 review and follow-up tools
E-commerce store
- Average order: $80; gross margin 50%; 2.5 orders per customer → LTV ~$100 gross profit
- Target CAC: $35
- New customers needed: 400
- Acquisition budget: 400 × $35 = $14,000/month
- Split: Meta and TikTok prospecting, Google Shopping, creative production, email retention
B2B service firm
- Client value: $20,000 gross profit over two years
- Target CAC: $3,000
- New clients needed per month: 3
- Acquisition budget: $9,000/month across SEO and content, LinkedIn, Google Search and sales time
How do you know what CAC to expect?
Use your own data if you have it. If not, start with benchmarks and a test budget:
- LocaliQ/WordStream's 2026 benchmarks put Google search leads at roughly $65–$70 on average and Facebook lead-campaign leads at around $27, with big differences by industry.
- Divide cost per lead by your lead-to-customer rate to estimate cost per customer. If leads cost $60 and 1 in 4 becomes a customer, CAC is about $240.
See how much Google Ads cost and how much Facebook ads cost for industry figures.
The three budgets: ads, production, people
| Budget | What it covers | Notes |
|---|---|---|
| Ad spend | Money paid to Google, Meta, TikTok, LinkedIn | Scales with results |
| Production | Video, photography, design, articles, landing pages | Creative quality drives ad costs down |
| People | Agency, freelancers, staff, tools | Fixed-ish monthly cost |
A common mistake is spending everything on ads and nothing on creative or tracking, which makes every ad dollar less effective. For agency costs, see how much a digital marketing agency costs.
Where should a small business spend first?
Start closest to purchase intent, prove it works, then expand:
- Free foundations: Google Business Profile, reviews, a fast website with clear service pages, basic tracking.
- High-intent paid: Google Search for your most profitable services (or Google Shopping for products).
- Compounding channels: SEO, content and AI search visibility.
- Demand creation: Meta, TikTok or LinkedIn, plus retargeting.
- Retention: email and SMS to bring customers back.
Not sure whether to start with Google or Meta? Read Google Ads vs Facebook Ads.
Keep a testing budget
Set aside around 10–20% of your budget for experiments: a new channel, a new offer, new creative. It's how you find the next profitable channel before the current one saturates.
How often should you review the budget?
Monthly. For each channel, look at:
- Spend
- Leads and customers
- CAC and payback period
- Return on ad spend for e-commerce
- Trend versus last month
Increase spend gradually on channels with healthy CAC; fix or cut the rest. Our guide on measuring marketing ROI shows how to set this up.
Budgeting by business stage
| Stage | Typical focus | Budget approach |
|---|---|---|
| Pre-launch / launch | Awareness, first customers, reviews | Fixed launch budget for 3–6 months; accept higher CAC while learning |
| Early growth | Find one profitable channel | Test 1–2 channels; scale the one with acceptable CAC |
| Steady growth | Add channels, build compounding assets (SEO, email) | Goal-based budget per channel; 10–20% for tests |
| Mature | Efficiency, retention, brand | Optimise CAC and LTV; invest in brand and retention |
Seasonality
Many businesses have predictable peaks (HVAC in summer and winter, retail in Q4, gyms in January, tax services before deadlines). Shift budget toward peak demand, start a few weeks before it, and use quieter months for SEO, content and creative production that pay off in the next peak.
Common budgeting mistakes
- Setting a budget from a percentage and never checking CAC
- Spreading a small budget across too many channels
- Spending everything on ads, nothing on creative, tracking or the website
- Cutting all marketing in quiet months, then starting from scratch
- Ignoring retention, which makes every new customer worth less
- Judging SEO and content on the same timeline as paid ads
A quick worksheet
| Question | Your answer |
|---|---|
| Average gross profit per customer (lifetime) | |
| Maximum acceptable CAC | |
| New customers needed per month | |
| Monthly acquisition budget (customers × CAC) | |
| Split: ads / production / people | |
| Testing reserve (10–20%) | |
| Review date |
The bottom line
Percentage-of-revenue rules are a starting point, not an answer. Work out what a customer is worth, what you can pay to win one, and how many you need; that gives you a budget you can defend. Start with high-intent channels, invest in creative and tracking, keep a testing budget, and review monthly.
Want help building a budget around your numbers? Request a free growth audit.
Frequently asked questions
What percentage of revenue should a small business spend on marketing?
Rules of thumb range from about 5% to 10% of revenue, more for new businesses or aggressive growth and less for established businesses relying on referrals. Gartner's 2025 survey of mostly large companies found an average of 7.7%. Your margins and goals matter more than any percentage.
How much should a new business spend on advertising?
New businesses often spend a higher share of revenue, sometimes well above 10%, because they have no existing customers or reputation. Base it on a launch plan: the number of customers you need to be viable and a realistic cost to acquire each.
Is $500 a month enough for advertising?
It can be for a local business in a low-competition niche, focused on one channel such as Google Search for a few high-intent keywords or a local Meta campaign. It is rarely enough to test several channels at once.
Should I spend more on Google Ads or Facebook ads?
Start with the channel where buying intent is strongest for your business. Urgent services usually start with Google; visual and new products often start with Meta. Expand once the first channel is profitable.
How do I know if my advertising budget is working?
Track customer acquisition cost (CAC), payback period and return on ad spend by channel, using conversion tracking and your sales records. If customers cost less than they're worth with a reasonable payback, increase spend gradually.
Sources
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SEO, AI search, paid media and social specialists
Articles from the MangoGrow editorial team are researched and written by our specialists in SEO, AI search, paid advertising, content, and social media, and reviewed before publishing.
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