"How much should my shop spend on marketing?" is the most common question we get from auto repair owners, and most answers online are uselessly vague. This guide gives you real numbers: spend tiers by shop size, current CPC and cost-per-lead benchmarks, and the allocation split that keeps every channel accountable.
The Benchmarks That Drive Everything
Budgets only make sense against real auction prices. Current Florida benchmarks for auto repair (national numbers are within ~15%):
- General auto repair / mechanic CPCs: $4–$12 per click
- Brake, diagnostic, AC repair CPCs: $5–$14
- Transmission / major repair CPCs: $10–$22
- Target cost per lead (booked service): $25–$90 depending on tier
- LSA cost per lead: roughly $20–$45
Two rules follow from the math. First, cost per lead is always higher than cost per click: CPL equals CPC divided by your conversion rate, so a $10 click at a 10% conversion rate is a $100 lead. Second, conversion rate is the biggest lever you control: campaigns converting at 10–12% (our managed standard) instead of the 5–8% industry norm cut cost per booked job by 40–50% with zero change in ad spend. Check your own market's numbers with the Google Ads cost calculator.
Budget Tiers by Shop Size
1–3 bays, single location: $1,500–$3,000/month ad spend
Enough for meaningful coverage of one service area. At a blended $8 CPC, $2,000 buys ~250 clicks; at 10–12% conversion that's 25–30 leads, and at a 60–70% booking rate on calls, roughly 15–20 booked jobs. With an average ticket of $400–$600, that's $7,000–$11,000 in monthly revenue attributable to ads, before repeat visits.
4–8 bays or strong service mix: $3,000–$6,000/month
Adds full LSA coverage, separate transmission/major-repair campaigns (the highest-ROI spend in the account), and competitor-conquest testing. This is the tier where offline conversion import matters most: feeding closed repair orders back into Google Ads points the algorithm at $2,000 jobs instead of oil changes.
Multi-location or fleet-focused: $6,000–$12,000+/month
Per-location campaign segmentation, fleet-specific landing pages and B2B targeting, and make-specialist positioning at metro scale. At this level, budget allocation between locations should follow map-pack gaps, not revenue splits, spend where you're weakest on Google, not where you're busiest.
How to Allocate: The 60/20/15/5 Split
- 60%, Google Ads + LSA: the demand-capture engine. Weight LSA up if your review count is strong (the badge converts trust instantly).
- 20%, Local SEO: GBP management, make-specific and neighborhood pages, citations. Compounds while ads rent attention. See the auto repair SEO playbook.
- 15%, Website / conversion: dedicated landing pages per service tier, click-to-call everywhere, speed. This is what makes the 10–12% conversion rate possible.
- 5%, Review generation: SMS automation and response management. Cheapest ranking factor in the entire stack.
The Three Budget Killers
- No negative keywords: "how to," "DIY," "salvage," and free-quote queries quietly consume 18–32% of unmanaged budgets.
- Sending paid clicks to the homepage: a transmission click landing on a generic homepage converts at a third the rate of a transmission page. Same spend, three times fewer jobs.
- Quitting at week six: Smart Bidding needs 30–90 days of conversion data. Shops that cut budget right as the algorithm learns pay for the education and skip the payoff.
What "Good" Looks Like After 90 Days
Cost per booked job settled in the $40–$90 range across tiers, LSA answering above 90%, 10+ new reviews per month, and, if tracking is wired correctly, a monthly report that names the keyword behind every major repair order. From there, scaling is arithmetic, not hope.
For the full channel-by-channel system, read the companion guide: Auto Repair Marketing: How Independent Shops Fill Every Bay in 2026. We run this playbook for shops in Jacksonville, Tampa, Orlando, Miami, Fort Lauderdale, and St. Petersburg, month-to-month, no contracts. Free budget review: (904) 341-5986.