Management fee
The part you pay for somebody to run it, separate from the work itself.
What it means
The charge for strategy, oversight and account handling, as distinct from producing pages or building links. On organic engagements it is usually bundled into one retainer figure. On paid work it is often split out and expressed as a percentage of spend, which is why the two read so differently on a price list.
Splitting it out is more honest and less flattering. A $2,400 retainer where $900 is management tells you something a single blended number does not.
Why it matters in HVAC
The number it should be judged against is booked jobs rather than deliverables. Management is what turns four service pages into a decision about which town to attack next, and a shop paying only for production is paying for motion.
Where it goes wrong in this trade is seasonal. Management fees keep charging through the quiet quarter while output visibly drops, which is exactly when the invoice gets questioned and exactly when the strategic work should be happening.
How to check it
Ask what portion of the retainer is management, and what that buys in hours and in whose time. Then ask what it covers in a month where no new pages ship. An agency that cannot answer the second question has bundled the fee to avoid it.
What splitting it out looks like
Plumbing & HVAC SEO publishes the paid-side split plainly: Google Ads management at $1,500 a month covering up to $10,000 of spend, then fifteen percent of everything above. Local Service Ads are tiered by call volume, $549 up to seventy-five calls, $949 up to a hundred and fifty, $1,549 up to two hundred.
Their organic programme is the opposite, a single $2,495 figure. They describe what it buys in a way that names the management explicitly: two thirds of what you are paying for is the strategy and the people who own your account, not the deliverable list.
That is an unusually direct thing for an agency to write down, and it is the right frame. The pages are the cheap part.