The short answer to how much a plumber should spend on Google Ads. Most plumbers in Australia should expect to spend between $30 and $100 a day, or $900 to $3,000 a month. The lower end works for general plumbing in a small service area. Emergency or after-hours plumbing in a city like Melbourne or Sydney needs the upper end. Below $30 a day the maths stops working. At $25 a click in a metro auction, you get a single click a day, which isn’t enough volume to learn anything from. Above $100 a day you start hitting diminishing returns unless you’ve built out multiple campaigns and landing pages.
The numbers that actually matter
- Real CPL band for general plumbing in 2026: $40–$100
- Emergency plumbing CPL band: $60–$150
- Minimum daily budget that lets the auction work: $30
- Average close rate on plumbing leads we see: 35–50%
- Realistic break-even job value at $80 CPL + 40% close rate: $200
Here’s the long version, including the three budgets that actually work, the spend traps that look like investment but aren’t, and why your cost per lead is probably lying to you.
A real plumbing call we had last March
A Newcastle plumber rang us in March. He’d been spending $50 a day on Google Ads for four months. Forty-seven leads in that time. Average CPL: $127. He thought he was being ripped off.
We looked at the account that afternoon. Three problems compounding on each other. Budget was a third of what the auction wanted. Match types were all broad, so every dollar was going to “DIY toilet” and “plumbing courses” type queries. The landing page form was below the fold on mobile, where 79% of his clicks were coming from.
Fixed all three by Monday. Six weeks later: CPL down to $54. Same Newcastle. Same business. Same Google.
The point: when a plumber asks what they should spend on Google Ads, the right answer almost always starts with “what does your account actually need to work”, not a dollar figure.
What’s the realistic Google Ads budget for an Australian plumber?
Three tiers, picked by what we see actually working across the 45+ Australian businesses we run paid media for week to week.
Tier 1: $900–$1,500/month ($30–$50 a day)
For a plumber doing general work in a small service area, this is the floor. You’ll get 10–25 leads a month at average CPL of $50–$100. Enough to keep two technicians busy if your close rate is reasonable.
What it doesn’t cover: emergency hours, multiple campaigns (general + emergency + drains + hot water), or aggressive geo-targeting across more than 3 suburbs.
Tier 2: $1,500–$2,500/month ($50–$80 a day)
This is the sweet spot for most plumbing businesses. Enough budget to run general + emergency as separate campaigns, target 5–10 suburbs distinctly, and not have the auction starve mid-week.
Expected: 25–45 leads a month, average CPL $50–$80. Strong margin if your close rate is 40%+.
Tier 3: $2,500–$5,000+/month ($80–$170 a day)
For multi-trade businesses (plumbing + gas + drains + hot water), or plumbers in dense metro areas like inner Sydney or Melbourne CBD where competition pushes CPCs to $25+.
Worth it only when you’ve already maxed out volume at Tier 2 and need more leads, OR you’re playing a brand-domination strategy where you want to own every plumbing-related query in your area.
The maths nobody shows you on the lead-gen blogs
A plumber’s break-even on a Google Ads lead is wildly different from a tradesperson selling $40K decks.
Take a typical job mix: 30% are unblockings ($350 average), 40% are leaks ($600 average), 20% are hot water installs ($1,800 average), 10% are bigger jobs ($4,000+ average).
Weighted average job value: roughly $1,000.
If your close rate on Google Ads leads is 40%, your cost per booked job is your CPL divided by 0.40. At an $80 CPL, that’s $200 per booked job. Against a $1,000 average, that’s a 20% customer acquisition cost. Sustainable.
At a $200 CPL (which is what most poorly-run plumber accounts sit at), it becomes a $500 cost per booked job. Against the same $1,000 average, you’re at 50% CAC. The agency makes money. You don’t.
The 4× CAC swing between a well-run and badly-run account is why “what should I spend” is the wrong question. The right question is what CAC you’re prepared to live with.
Six spend traps we see in plumbing accounts every week
We’ve audited dozens of Australian plumber Google Ads accounts in the last six months. The same expensive mistakes show up again and again.
1. Broad match keywords on a small budget
Broad match works when you have $200/day to feed Google’s algorithm enough signal. At $50/day, broad match is just paying for irrelevant queries. We’ve seen plumbers spending 30% of budget on terms like “plumbing apprenticeship” because of one broad match keyword nobody knew was running.
2. Search Partners turned on
The little tick box that defaults to ON when you build a Google Ads campaign. Search Partners is Google serving your ads across a network of third-party sites. For local services, click quality from Search Partners is poor. Turn it off, see what happens.
3. Too many campaigns, not enough budget
A common pattern: plumber sets up 5 campaigns (general, emergency, drains, hot water, gas) on a $50/day budget. That’s $10 a day per campaign. At $20 CPCs in metro Sydney, you get half a click per campaign per day. The auction never has enough data to optimise. Consolidate.
4. Wrong geo-targeting setting
The default is “presence and interest”, which means Google serves your ad to people who have shown interest in your service area, not just people physically in it. For plumbing, you need “presence only”. Otherwise you pay for clicks from people in entirely different cities who happened to search “plumber Sydney” once.
5. Landing page form below the fold
We audited a Geelong plumber’s account in May. Quality score was 4/10 across the board. The fix wasn’t ad copy. The form on his website sat after a 600-word “About our family business” section. Mobile users had to scroll past three screens to see it. Moved the form above the fold. Quality score climbed to 7/10 in two weeks. CPC dropped 22% with no other changes.
6. No call extension
Roughly 60% of plumbing leads convert via phone, not form. Without a call extension, you’re losing the easy wins. It’s a 10-minute fix. We still see accounts running for years without one.
The metric that actually beats cost per lead
This is the part most agencies won’t tell you because it makes their dashboard look worse.
A $50 lead that closes at 25% costs you $200 per booked job. A $120 lead that closes at 60% costs you $200 per booked job too. The CPLs look completely different. The economics are identical.
We track close rate by lead source across every client’s pipeline. The pattern is consistent: leads that took longer to acquire and cost more usually had higher buying intent, and they close at much higher rates. Cheap leads from generic terms like “plumbing” close at 15–25%. Expensive leads from intent-loaded terms like “emergency plumber Brisbane after hours” close at 50–70%.
If you optimise for CPL alone, you’ll defund the campaigns that produce your best customers and starve the campaigns that produce your worst ones. We’ve seen plumbers double their booked job count by ignoring CPL entirely and tracking cost per booked job instead.
The simplest way to start: for every quote you write this month, log which campaign the lead came from in a Google Sheet. By month two you’ll see which campaigns close and which don’t. By month three you’ll know exactly where to put more budget and where to pull it.
What we’d actually recommend if you’re a plumber starting today
Start at $50/day for 30 days. Two campaigns max (general + emergency). Phrase and exact match only. Never broad.
Force “presence only” geo-targeting and lock it to your real service radius plus 3 surrounding suburbs as explicit targets.
Add a call extension on day one. Set up call tracking through your GHL/CRM so you can attribute calls to campaigns.
Fix the landing page form. Above the fold on mobile. Sticky phone-call button. One CTA. Nothing else matters until this is right.
After 30 days, look at search terms. Negate everything irrelevant. Add the high-intent queries as exact match.
After 60 days, look at close rate by campaign. Move budget to what closes. Cut what doesn’t.
At Tier 2 ($1,500/mo done properly), most Australian plumbers should be sitting at 25–45 leads a month at a CPL between $50 and $80, with 40%+ closing into booked jobs. That’s $200–$320 cost per booked job against a $1,000 average. Profitable.
If you’re spending in that range and your numbers look nothing like this, the account is fixable. Most of the time the fix is structural, not budgetary. We do free Google Ads audits for tradies. You can request one here and we’ll tell you exactly what’s broken and whether it’s worth fixing or worth a rebuild.
For more on the cost-per-lead conversation, see the trade-by-trade CPL benchmarks we published last week. Or if you’re earlier in the funnel and not sure paid search is the right channel, our Before You Call page covers the questions to ask before signing with any agency.
If you want the full picture of how we run accounts in your trade, see Google Ads for plumbers, and the benchmarks reference for all Australian trades.
