How much should a service business spend on marketing?

The most cited benchmark puts marketing at roughly 7% to 8% of revenue, but treat that as a sanity check, not a target. Gartner's 2025 CMO Spend Survey reported that marketing budgets held flat at 7.7% of overall company revenue, the same as 2024. The survey covered 402 marketing leaders in North America, the UK and Europe, and most of their companies earned more than $1 billion a year.

That matters because a large company's marketing budget pays for brand campaigns, staff and agencies at a scale a 12-person accounting firm or a two-location med spa does not have. A smaller service business often needs a higher share of revenue while it is growing into a market, and a lower share once referrals and repeat business carry more of the load. A percentage tells you what others spend. It does not tell you what you need.

A revenue percentage ties next year's marketing to last year's sales, which runs backward for a business trying to grow. It also ignores three things that decide whether marketing pays: what a new customer is worth, how much it costs to get a lead in your industry, and how well your team turns leads into booked work.

• Customer value differs by an order of magnitude. A family law client, a recurring lawn care customer and a one-time detail customer are worth very different amounts over their relationship with you.
• Lead costs differ by industry and market. The same budget buys far more leads for an auto repair shop than for a law firm.
• Close rate changes the math more than spend does. A business that books half its leads needs half the leads of one that books a quarter of them.
• Capacity sets a ceiling. Spending to generate leads your team cannot schedule or call back wastes money and damages reviews.

Work backward from the customers you need. You need four inputs, and most service businesses can pull them from their CRM, booking system or accounting software in an afternoon.

• Step 1: Set the target. How many new customers do you need this quarter to hit the revenue goal, after accounting for repeat customers and referrals?
• Step 2: Find your close rate. Of the leads you received last quarter (calls, forms, bookings), what share became paying customers?
• Step 3: Divide. New customers needed divided by close rate equals leads needed.
• Step 4: Price the leads. Multiply leads needed by your expected cost per lead for each channel you plan to use.
• Step 5: Add fixed costs. Website hosting and upkeep, software, content production and any retained help.
• Step 6: Check against customer value. Total spend divided by new customers equals your acquisition cost. Compare it with the gross profit an average customer brings in.

Here is the math for a hypothetical physical therapy practice. The numbers are illustrative, apart from the benchmark cost per lead, which comes from LocaliQ's 2026 search advertising benchmarks for physicians and surgeons ($40.04). Use your own figures when you run it.

The practice wants 60 new patients this quarter from paid search. Last quarter, 40% of inquiries became patients. Sixty divided by 0.40 is 150 leads. At roughly $40 per lead, that is about $6,000 in ad spend for the quarter, or $100 per new patient. If an average new patient completes a plan of care worth several times that in gross profit, the spend is justified, and the practice can test raising it. If not, the fix is in the close rate or the offer, not the budget.

If you have no history of your own, start with a published benchmark and replace it with real numbers after the first few weeks of data. LocaliQ's 2026 search advertising benchmarks give an all-industry average cost per lead of $66.69 for search ads. The spread across service categories is wide.

Separate what you pay to stay visible from what you pay to buy leads. Fixed costs keep the foundation working: a fast website, an accurate business profile, review requests, email to past customers. Variable spend (ads, sponsored listings, paid directories) is the lever you adjust as results come in.

The SBA's guidance on writing a marketing plan asks for a complete breakdown of costs and for tracking those costs once the plan is running. That second part is where most budgets fail. If you cannot tie leads to the channel that produced them, you cannot tell which line of the budget to grow. Monvell's Marketing and Consulting teams build budgets this way, starting from goals and close rates, and set up the tracking that shows which spend is working.

Spend more when acquisition cost is comfortably below customer value and your team has capacity to take more work. Hold or cut when leads arrive faster than you can respond, when close rate is dropping, or when you cannot see where leads are coming from. A new location, a new service line or a seasonal peak justifies a temporary increase; set an end date and a result you expect before you start.