Short answer (TL;DR)
For a US small business, Google advertising starts making sense at around $400 to $600 in media budget per month, plus a one-time setup and monthly management. Cost per click (CPC) runs between $0.50 and $2.50 for most industries, and in competitive service categories (attorneys, insurance, dentists) it can climb past $4. Your total monthly cost with an agency realistically lands between $600 and $1,500 for smaller campaigns.
What the cost is actually made of
Google advertising has three separate line items that people constantly blend into one:
1. Media budget is the money that goes straight to Google for impressions and clicks. You set this number. 2. Campaign setup is one-time work: keyword research, account structure, ad copy, conversion tracking. With us it starts around $350, depending on scope. 3. Monthly management is optimization: cutting the keywords that burn money without results, A/B testing ads, adjusting bids. Agencies bill this as a flat fee or a percentage of your budget.
When someone says "Google Ads costs $600," they almost always mean only the first line item. Your real cost is the sum of all three.
Cost per click (CPC) by industry
| Industry | Typical CPC | Notes |
|---|---|---|
| Trades and home services | $0.50 - $1.50 | low competition, good ROI |
| Online stores | $0.40 - $1.20 | depends on the product |
| Restaurants and hospitality | $0.60 - $1.80 | seasonal swings |
| Construction and remodeling | $1.00 - $2.50 | higher deal value |
| Legal and financial services | $2.50 - $5.00 | the most expensive keywords |
| Healthcare and aesthetics | $2.00 - $4.50 | heavy competition |
These numbers are ballpark figures and they shift with location, time of day, and ad quality. The better your ad and the more relevant your landing page, the less you pay for the same position, because Google rewards quality with a lower CPC.
How many customers you get for your money
Say you have a $500 media budget and an average CPC of $1.00. That is roughly 500 clicks a month. If 5 percent of those clicks turn into an inquiry, which is a realistic conversion rate for a good landing page, you get about 25 inquiries. Close one in five and that is 5 new customers a month.
Whether that pays off depends on what one customer is worth. For a plumber where a single job means $400, a $500 budget for 5 customers is excellent math. For a store selling a $20 product, the same number is a loss. That is why, before you launch anything, you have to calculate how much one acquired customer is allowed to cost you.
The minimum budget below which it makes no sense
Under $250 in monthly media budget, Google does not collect enough data for the algorithm to learn who to target. The campaign stays stuck in the learning phase and spends inefficiently. For most industries the realistic floor is $400, so the campaign runs long enough to produce measurable results.
Agency fees: flat rate or percentage
Agencies bill management two ways:
- Flat fee, for example $200 to $500 per month for smaller campaigns. Predictable and fair at small budgets.
- Percentage of spend, usually 10 to 20 percent. Makes more sense at larger budgets above $2,500 per month.
At small budgets a flat fee is almost always the better deal, because 15 percent of $500 is only $75, which does not cover serious monthly optimization. Be careful with agencies offering management for $40 a month, because it means nobody is really looking at your campaigns.
Google Ads or SEO?
The most common question. Short version: Google Ads brings customers immediately, but it stops the moment you stop paying. SEO takes months to work, but then it delivers traffic without paying per click. Ideally you do both: ads for immediate flow, SEO for long-term independence. If you only have budget for one and you need customers this month, start with ads. We covered SEO pricing in a separate article.
The most common money-burning mistakes
1. Sending ads to your homepage instead of a dedicated landing page. Someone who clicks an ad for "roof repair" needs to land on a roof repair page, not a general homepage. 2. No conversion tracking. If you are not measuring how many calls and inquiries the campaign brings in, you have no idea whether it works. 3. Broad keywords with no negatives. Without a negative keyword list you pay for clicks from people searching "free" or "jobs." 4. Killing the campaign after two weeks. The first month is the learning phase. Results mostly stabilize only after 30 to 60 days.
Our recommendation
If you are just starting, set a $400 to $600 media budget, stick with it for at least 60 days, and track conversions from day one. Without measurement, every dollar you put in is a guess. With measurement, after two months you know exactly what one customer costs you and whether it makes sense to scale the budget up.
Want to know if Google Ads pays off in your industry?
At NovusAgency we will estimate the real CPC for your keywords in 30 minutes with no obligation, propose a starting budget, and calculate how much one customer is allowed to cost you for the campaign to be worth it.
[Book a free 30-minute consultation](https://novusagency.co/en/contact) and get a concrete estimate for your industry.