Run Google Ads in house or hire an agency, and why two assistants put the threshold ten times apart

Asked whether a US business should run Google Ads in house or hire an agency, ChatGPT and Gemini gave opposite advice at the low end of the market and put the in house threshold ten times apart. ChatGPT said start in house under 1,000 dollars a month of ad spend and compare an in house hire against an agency above 10,000. Gemini said managing internally at low spend is uneconomic, hire an agency or contractor under 20,000 a month, and only bring the work in house above 100,000. Neither is wrong. They are answering about two different kinds of in house, and the figures inside Gemini's own answer settle where the line actually falls: a fully loaded US specialist at 93,750 to 137,500 dollars a year costs the same as a 15 per cent management fee on 52,000 to 76,000 dollars of monthly spend.

What was asked, and what came back

One question, put to the ChatGPT and Gemini product surfaces through a data provider on 21 October 2026, at 22:18 and 22:36 UTC. Both ran a live web search. No budget was given in the question, which is why each engine supplied its own thresholds.

• ChatGPT returned 34 citations, 11 of them on Google's own support and business documentation plus one on the Google Ads product itself. It gave four options in order, with a spend band against each.
• Gemini returned three citations, all of them agency or consultant blog posts. It gave three spend bands, a salary range for the in house option, and a named tool and recruiting route for each path.

One detail worth copying from the ChatGPT answer: it named a cited source and disclosed that the source sells competing software, telling the reader to weigh its analysis accordingly. A conflict of interest disclosure on a cited source is rare in these readings, and it is the single most useful sentence in either answer.

The two sets of thresholds, side by side

Monthly ad spend	ChatGPT said	Gemini said
Under 1,000 dollars	In house, using Google's free learning resources, with accurate conversion tracking as the condition	Hire an agency or contractor. Managing internally at this spend is uneconomic against a salary
1,000 to 10,000 dollars	An independent specialist, at 50 to 150 dollars an hour	Agency or contractor, at a flat 1,500 to 5,000 a month or 10 to 20 per cent of spend
10,000 to 20,000 dollars	Compare specialist agencies against an in house hire. Complexity matters as much as spend	Still agency
20,000 to 100,000 dollars	Not broken out. Agency fees given as 500 to 5,000 and upwards a month, often 10 to 20 per cent of spend	Hybrid, around a 2,000 base plus 5 to 10 per cent of spend, with strategy kept internal
Above 100,000 dollars	Hybrid for large, strategically important accounts	Bring in house. An internal team at roughly 120,000 to 200,000 fully loaded beats agency percentages

Why both answers are right, which is the part that helps

The word in house is doing two jobs across these two answers, and once they are separated the contradiction disappears.

• In house as a few hours of an existing employee. This is what ChatGPT means under 1,000 dollars a month. The marginal cost is some of a generalist's week, there is no new salary, and the risk is that conversion tracking is set up wrong, which is why that answer makes tracking the condition rather than the budget.
• In house as a dedicated hire. This is what Gemini means, and it prices it: 75,000 to 110,000 dollars a year for a US specialist, plus 20 to 30 per cent for benefits. On that definition a dedicated hire genuinely cannot be justified at 1,000 dollars of monthly spend, and the advice to hire out follows.

So the question to settle before reading any threshold is which of those two you are comparing. A business with somebody competent already on the payroll is in the first row. A business planning to recruit is in the second, and the break even is a long way up.

The break even, calculated from the figures in the answers

This is arithmetic on the engines' own numbers rather than a new survey, and it is checkable in a line. Take Gemini's salary range of 75,000 to 110,000 dollars and its benefits loading of 20 to 30 per cent. A fully loaded dedicated specialist costs 93,750 at the bottom and 137,500 at the top, which is 7,812 to 11,458 dollars a month.

Now price the agency alternative at the 15 per cent midpoint of the 10 to 20 per cent band both engines gave:

• At 20,000 dollars of monthly spend a 15 per cent fee is 3,000 a month, well under the cost of the hire.
• At 52,000 of monthly spend the fee reaches 7,800, which matches the cheapest fully loaded hire.
• At 76,000 of monthly spend the fee reaches 11,400, which matches the most expensive one.
• At 100,000 the fee is 15,000 a month, comfortably above either hire.

So on the figures in these two answers the crossover for a dedicated hire sits between 52,000 and 76,000 dollars a month of ad spend, not at 20,000 and not at 100,000. Below that range an agency fee is cheaper than a salary. Above it the hire is cheaper, and the decision turns on whether one person can cover strategy, build, creative and analytics on their own, which is usually where a hybrid arrives.

Two cautions on using that number. It counts the fee against the salary and nothing else, so it excludes recruitment, software, cover for holidays and the months before a new hire is productive. And an agency percentage usually comes with a monthly floor, so at low spend the floor rather than the percentage sets the bill.

The five things to settle whichever way you go

1. Account and billing ownership in your company's name. Both answers put this first in practice, and it is the one term that is expensive to fix later. For a larger structure, our note on manager accounts and the ownership rules covers how to hold access across several accounts.
2. Conversion tracking that counts qualified leads, sales or revenue, not clicks or form loads. This is the condition that decides whether any of the rest is measurable.
3. The fee basis at your actual spend, including every floor, every percentage and the first month.
4. Who does the work. Ask that the person managing the account joins the sales conversation.
5. What is out of scope. Creative, landing pages, feed management and analytics work are frequently separate, and a cheap management fee with everything excluded is not cheap.

Where the two answers came from, and why it matters here

ChatGPT's evidence was mostly Google's own documentation: eleven citations across Google support, Google for business and the Google Ads product. That is the right source for how the platform works and it says nothing about what an agency should cost, which is why that answer's fee figures are given as indicative public ranges rather than quotes.

Gemini's three citations were an agency blog, a consultant's blog and a digital agency's article. Its salary range, its benefits loading and its three thresholds all come from that class of source, and the engine passed them on without naming the interest behind them. Both answers are useful and neither is a benchmark, which is exactly why the arithmetic above is set out in full rather than quoted as a finding.

The measurement neither answer included

Both answers were about who should buy the clicks. Neither mentioned what happens before a buyer searches at all: an assistant answering the category question and naming three businesses, none of them yours. That is a separate measurement from cost per click and cost per acquisition, and it is the one AI Knows Us takes. We put the buying questions a customer would ask to ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews, record every business named and every source cited, and report them with the date. We manage no advertising and take no percentage of anybody's spend.

Our own rates, verified on 22 October 2026, so a buyer can price us the way this page prices an agency. In the US and the UK the ladder runs SEO Start at 149 dollars a month, Growth 299, Scale 599, SEO Scale 699, Inbound 1,099, Outbound 1,299, Agency 1,299 and Everything 1,799. Outside the US and the UK the first two tiers are 99 and 199, so the floor is a US and UK floor. SEO Start reads 0 questions on 0 engines, so Growth at 299 is the cheapest plan that reads all five surfaces, and a Claude reading costs 3 credits where the others cost 1.

Where a rival is stronger, by name. tryprofound.com publishes single sign on, SAML and SOC 2 with up to nine answer engines on its enterprise tier. Our own pricing document, 119,203 bytes read the same day, renders no single sign on, no SAML, no SOC 2, no ISO certification, no data processing agreement and no white label, and we read five surfaces rather than nine. It also contradicts itself for anyone running several brands, listing businesses covered as 1 1 1 1 1 1 10 1 across the plans while the row beneath reads more than one business, no, in every column.

The limits of this reading, stated plainly. It is one question per engine on one night. The salary and benefits figures are the engine's, not ours, and we did not verify them against a payroll source, so the crossover range above is arithmetic on a quoted range rather than a measured market rate. Use it as a structure to put your own salary quote through.

Questions US advertisers ask about in house against agency

At what ad spend should I hire a Google Ads specialist

On the figures in these two answers, a dedicated hire breaks even against a 15 per cent management fee somewhere between 52,000 and 76,000 dollars a month of ad spend, before recruitment, tooling and ramp up time. Below that an agency or an independent specialist is usually cheaper, and above it the hire is, provided one person can cover the whole job.

Can a small business run Google Ads itself

One engine says yes under 1,000 dollars a month with the platform's own free learning resources, and the condition it attaches is the right one: conversion tracking that counts something the business cares about. The other engine's objection applies to recruiting somebody for the task, which is a different question at that budget.

What does a Google Ads agency charge

Both engines gave 10 to 20 per cent of ad spend as the common model, with flat retainers of 500 to 10,000 a month and hourly work at 50 to 199 an hour. Ask where the monthly floor sits, because at low spend the floor is the price.

Is a hybrid model worth it

Both answers converge on it in the middle of the market, one as a base fee of around 2,000 plus 5 to 10 per cent of spend, the other as internal ownership with agency execution. It fits the case where strategy and margins must stay inside the business but the build and the daily work should not.

How do I check what assistants tell advertisers in my category

Ask the question your buyer would ask, with the service and the city in it and no brand name, on each assistant. Record every option named, every threshold quoted and every source listed, then put the numbers through your own arithmetic as this page does. Run it again a week later, because the thresholds move with the sources behind them.