Septic Marketing Agency or DIY: How to Decide

Hire an agency if you run ads in more than one town, spend real money on Google Ads, or you're the only person who can answer the phone when a lead calls. Do it yourself if you're under $500K in revenue, work one town, and already have a decent set of reviews and photos going. Most septic companies land somewhere between those two, and that's fine too.

I've run lead gen for trade contractors for years, mostly plumbing, HVAC, and septic. I've watched owners overpay an agency for work they could have done themselves in an evening, and I've watched other owners burn a Saturday fighting a Google Ads dashboard that a $300 monthly spend never justified. Neither mistake is really about marketing skill. It's about matching the tool to the size of the job in front of you.

This post walks through when each option wins, what a management fee actually costs, the questions to ask before you sign a contract, and a 90-day plan you can run yourself before you hire anyone at all.

DIY vs. Hybrid vs. Agency, Side by Side

Here's the shape of each option before we go section by section.

The rest of this post breaks down each column: when it fits, what it actually costs, and how to protect yourself if you go the agency route.

When DIY Wins

DIY wins when your shop is small enough that you can see the whole business from the driver's seat.

Three conditions usually line up together. You're doing under $500K a year, which means you can't yet justify $1,500 or more a month in fees on top of ad spend. You work one town or a tight cluster of them, so there's no multi-location complexity to manage. And you've already got a decent profile going: a real number of reviews, a few good photos, a Google Business Profile that's filled out instead of half-abandoned.

If all three are true, hiring an agency mostly buys you time, not results you couldn't get yourself. A solo operator with 40 reviews and a filled-out profile in a single county can outrank a bigger competitor who neglects both, agency or no agency.

What DIY actually costs you: 6 to 10 hours a week. That's checking your Google Ads account for wasted spend, posting a photo after a good job, and asking for a review before you leave the driveway. Skip that for a month and DIY quietly turns into doing nothing, which is its own kind of marketing decision, just not the one you meant to make.

When an Agency Wins

An agency earns its fee once the job gets bigger than one person can hold in their head.

Three signs point that way. You're running paid ads with a real budget, meaning more than a few hundred dollars a month, because home services search ads averaged a $7.85 cost per click and a $90.92 cost per lead in 2025, and a serious campaign needs enough spend to gather data, not just enough to place a few ads. You're covering more than one town, which multiplies the number of pages, ads, and profiles you have to manage correctly. Or you're the owner and also the only person who quotes the job, drives the truck, and answers the phone, which means marketing is the first thing that slips the moment a slow month turns busy again.

None of that means DIY owners are lazy or agency clients are flush with cash. It means the math changes once you're managing five ad groups across three towns instead of one campaign in one zip code, particularly if your busy season swings hard and someone needs to adjust bids while you're slammed with calls.

What you're actually buying with a management fee is someone who checks the account when you can't, which matters more day to day than any single tactic. What that costs, and what it should include, is next.

The Hybrid Approach: Split the Work

Most of my septic clients land here, not at either extreme.

You keep the parts of marketing that need your face and your voice. That's asking for a review right after you finish a job, snapping a photo of the crew and the truck, and posting a quick update to your Google Business Profile when you add a service or hit a milestone. No agency does this as well as you do, because customers can tell when a review request comes from the person who fixed their tank instead of a template email sent three days later.

The agency runs the parts that need daily attention and a paid tool stack: bidding on Google Ads, keeping the website fast and current, and building the local SEO work that compounds over months, not days.

Split this way, you spend 2 to 4 hours a week instead of 6 to 10, and you keep the relationship work that actually builds your reputation around town. The trade is real: you're paying for the technical half while doing the human half for free, and it only makes sense once the technical half is genuinely more than you can keep up with on your own.

What a Management Fee Actually Costs

In my experience running these accounts, a septic marketing agency's management fee runs $1,500 to $4,000 a month, separate from whatever you spend on ads.

That's not an industry average pulled from a report. It's what I've seen agencies, including mine, actually charge septic and other trade companies, and the range holds because the work underneath it doesn't change much: someone has to check the ad account daily, watch the numbers, adjust bids, fix the website, and answer your questions when something looks off. Below $1,500 a month, you're usually getting a template someone set up once and rarely touches again. Above $4,000, you're paying for multiple channels running at once, or a senior person's time instead of a junior account manager handling a stack of accounts.

Ask directly what the fee includes: campaign management only, or campaign management plus SEO plus the website plus reporting. Two agencies quoting $2,000 a month can be doing very different amounts of work for that price.

Questions to Ask Before You Sign

Ask these questions before you sign anything, not after your first invoice arrives.

The most important one is ownership. If the agency built your Google Ads account, your Business Profile, or bought your tracking numbers under their own logins, you don't own your own marketing. You're renting it, and renting stops the day you cancel.

Contract length matters more than most owners think going in. A 90-day minimum lets an agency prove out a strategy without pretending everything works in month one. A 12-month contract with no exit clause protects the agency, not you.

And get specific about what "lead" means in their reporting. A form fill from someone who never answers the phone is not the same as a booked pump-out. Ask them to define it before you sign, then check their definition against your own phone and job records once a month.

Red Flags That Mean Walk Away

Three signs mean you should keep looking, no matter how good the pitch sounds.

A guaranteed ranking is the first one. Google's own guidance says no one can guarantee a #1 ranking on Google, because the algorithm isn't something any agency controls. Anyone promising a specific position is either lying to you or planning to hit it with a tactic that gets your site penalized later.

No call tracking is the second one. If every call routes through your regular business number, the agency has no way to prove which calls came from their work and which came from your truck decals or word of mouth. That's not a small gap. It's the entire measurement of whether the fee is doing anything at all.

A report that only shows impressions and clicks is the third. Those numbers are easy to make look good and hard to turn into cash. Ask instead for calls, form fills, and, ideally, booked jobs, then compare that against what you actually closed that month.

None of these red flags need to end a relationship the first time you spot one. An agency that fixes the gap once you point it out is a different agency than one that gets defensive about it.

A 90-Day DIY Plan to Try First

Run this before you sign with anyone. It costs you time instead of a contract, and it tells you exactly what you'd actually be paying an agency to take off your plate.

By day 90 you'll know something most owners never find out before they sign a contract: what your own marketing actually produces once you're paying attention to it.

Frequently Asked Questions