how much should a plumbing/HVAC company spend on facebook ads is really two questions wearing one trench coat. The first is “what’s a safe number to start with.” The second, the one that actually matters, is “what result am I buying with that number.” Skip straight to a dollar figure without answering the second question and you’ll either underspend your way to zero data, or overspend chasing a number that was never going to tell you anything.
Here’s a realistic way to think about your Meta ads budget as a plumbing or HVAC company — by stage, by goal, and by what the numbers actually need to prove before you scale them up.
Why There’s No Universal Answer
Anyone who gives you a flat dollar figure without asking about your business is guessing. Your real number depends on:
- Market size and competition — a single HVAC company competing with fifteen others in a metro area needs a different budget than one covering a small town with two competitors
- Your reputation — a business with 80 five-star Google reviews converts Meta traffic differently than one with 12 reviews and a thin Google Business Profile
- What phase you’re in — testing a brand-new offer and creative is a different budget than scaling something that’s already proven to convert
That’s the honest starting point. What follows is a framework for landing on your number, not a magic figure to copy.
Realistic Starting Budgets by Business Stage
Testing Phase: New to Meta Ads
If you’ve never run Meta ads for your business, your first job isn’t to generate a flood of leads — it’s to find out which offer and creative actually gets a homeowner to stop scrolling. That takes a modest, sustained budget over about 30 days, split across 2-3 creative variations (different before/after photos, different offers, different hooks), rather than one ad running alone.
Spending less than that risks Meta’s algorithm never leaving its “learning phase,” where it hasn’t gathered enough data to optimize delivery — which means every dollar performs worse than it should.
Scaling Phase: Something Is Already Working
Once you know your cost per lead and, more importantly, your cost per booked job, budget increases should follow performance, not confidence. A common approach is increasing spend in modest increments (20-30%) every week or two rather than doubling overnight, which tends to disrupt the algorithm’s delivery and temporarily spike costs.
What Percentage of Revenue Do Contractors Typically Spend on Marketing?
As a general benchmark — not a rule — many small businesses, home services included, allocate somewhere in the range of 5-10% of revenue to marketing overall, with a portion of that going to paid ads specifically and the rest split across SEO, reviews management, and other channels. Newer businesses trying to grow market share often run higher than that; established businesses defending existing market share often run lower.
Treat this as a sanity check on your total marketing spend, not a formula for your Meta ads line item specifically.
Signs You’re Spending Too Little (or Too Much)
You’re spending too little if:
- Your campaign never generates enough leads to tell you anything meaningful within 30 days
- You keep pausing and restarting the campaign, which resets Meta’s learning phase every time
You’re spending too much if:
- Cost per lead keeps climbing with no corresponding improvement in lead quality — that’s usually a targeting or creative problem, not a budget problem
- You’re generating leads faster than your team can follow up on them (a fast-follow-up problem is often mistaken for a budget problem)
More budget doesn’t fix bad targeting or a weak offer. It just makes the mistake more expensive, faster.
A Simple Monthly Budget Framework You Can Use This Week
- Pick a starting number based on your stage (testing vs. scaling) and market size — err toward the lower end if you’re unsure
- Run it untouched for 30 days with 2-3 creative variations, resisting the urge to pause and adjust daily
- Track cost per booked job, not just cost per lead — a cheap lead that never becomes a job is more expensive than an expensive one that does
- Adjust based on results, not gut feel — scale up in modest increments if cost per booked job is healthy; fix creative/targeting first if it isn’t
The Bottom Line
There’s no universal number, but there is a universal process: start with a modest, sustained test budget, give it 30 days without interference, measure cost per booked job instead of cost per lead, and let performance — not confidence — decide when to scale.
If you want a specific number for your market, reputation, and goals instead of a general range, book a free growth audit and we’ll build you an actual budget recommendation.
