Performance Marketing Agencies: How They Get Paid, What to Check, and When to Hire One

You learn more about a performance marketing agency from its fee clause than from its case studies. A performance marketing agency plans, buys and optimizes paid media against a cost-per-result target, across search, social, retail media and affiliate. But the label covers two different businesses: one is paid more when your sales rise, the other bills a retainer and reports results on a dashboard it controls. How an agency asks to be paid tells you which one you are talking to, and how much it believes it can prove.

Where we stand: Thrad is not an agency. It is a demand-side platform for ads inside AI conversations, and performance agencies are among the teams that buy on it. The figures below come from the ANA, the platforms and the other sources named.

What a performance marketing agency does

• Sets the target. Agrees the action that counts and the cost per acquisition or return on ad spend that makes it profitable.
• Buys the media. Runs campaigns on Google, Meta, Amazon, TikTok, LinkedIn and, increasingly, newer channels, inside accounts you should own.
• Feeds the machines. Supplies conversion data, audiences and creative variations to automated campaign types that now do most of the bidding.
• Measures and moves budget. Reports results across platforms and shifts spend toward what works.

If the term itself is new, our performance marketing guide covers the channels, pricing models and benchmarks the agency will be working with.

How performance marketing agencies get paid

Fees, not results, still dominate. The ANA's 2022 study of agency compensation found that "fees, particularly labor-based fees, are the most dominant method of compensation today", and in its 2017 edition the ANA reported that commission use had "climbed back to 12 percent". Pressure for results-based pay is rising, though: the World Federation of Advertisers reported in 2024 that "58% of advertisers plan to increase their focus on results-driven pricing".

For paid media specifically, one widely cited pricing guide from the reporting tool Swydo gives these ranges. It does not publish a survey method, so treat them as a vendor's estimate:

The same guide puts monthly minimums at $1,000 to $5,000 "regardless of ad spend level" and one-time setup fees at $500 to $3,500. What the ranges cannot tell you is whether a given agency is worth its fee. A 15 percent fee on a channel that returns three dollars for every one spent is cheap; the same fee on a channel that only claims to is not.

Why the fee clause matters more than the case study

Performance pay sounds like the safe choice. It carries a catch. Most agencies are measured on conversions reported by the ad platforms they buy on, and platform attribution credits the ad with conversions it can connect to it, which can include sales that would have happened anyway. An agency paid on those numbers is rewarded for counting generously. The fix is to pay on a measure neither the agency nor the platform controls.

That measure is incrementality. Google describes its Conversion Lift tool as "the way to measure the causal impact of ads"; Meta says incrementality is "best measured by a randomized experiment" and that a lift study shows whether your attribution model matches a controlled test. Put the test in the contract: the bonus pays on lift measured against a holdout, or on sales in your own systems, not on conversions inside the ad account.

The same logic applies to how the agency buys media. The ANA's 2026 report on principal media, where an agency buys inventory itself and resells it, found that "58 percent of respondents" were with companies that had used it in the past year, and that the top concern was "uncertainty if the recommended media is in the client's best interest (90 percent)." A decade earlier, the ANA's K2 investigation found that "cash rebates from media companies were provided to agencies" based on spend. The ANA's guidance since has been to ask for proof of performance and transaction data on principal media.

What the partner badges prove

Most agencies display a Google Partner or Meta Business Partner badge. They mean something, but less than the size of the logo suggests. Google Partner status requires "a minimum optimization score of 70%", $10,000 of ad spend across managed accounts over 90 days, and at least half of account strategists certified; Premier Partners are "in the top 3% of participating companies" in their country. Meta says its partner eligibility "varies by solution type" and rests on the quantity and quality of an agency's work on Meta.

A badge shows an agency spends enough, keeps its accounts in line with the platform's scoring and trains its staff. It does not show that its clients' accounts made money.

Agency, in-house or the platform's own automation?

Many advertisers have already moved part of this work inside. The ANA's 2023 survey found "82 percent of ANA members" have an in-house agency, up from 78 percent in 2018, and 65 percent had moved business from external agencies to it, with social media and search among the services most often brought in-house.

The platforms have taken over much of what was left. Google said it made more than 90 quality improvements to Performance Max that "increased conversions and conversion value by more than 10%" for advertisers, and Meta said its Advantage+ end-to-end solutions reached "over $75 billion in annual revenue run-rate" in the second quarter of 2026. Agencies are automating too: Forrester found in 2024 that more than 60 percent of decision-makers said their agency already uses generative AI.

What an agency still adds is judgment across platforms, creative volume, clean measurement and access to channels a small team cannot run well. Hire one when you buy across several channels or markets, lack anyone in-house who owns paid media, or need creative at a pace you cannot produce. Keep it in-house when you run one or two channels that the platforms' automation already handles, and you have someone who can read the results honestly.

Questions to ask a performance marketing agency

1. Which accounts will our campaigns run in, and will we own them, the data and the creative if we leave?
2. How are you paid, on what base, and what is the minimum term?
3. If part of the fee depends on performance, which numbers decide it: platform-reported conversions, our own sales data, or a lift test against a holdout?
4. Do you buy any media as principal, and will you disclose it and the margin?
5. Which channels do you run beyond Google and Meta, including ads inside AI conversations?
6. Show us a current client report, including a result that went badly and what you changed.
7. Who works on our account day to day, and how many other accounts do they run?

The ANA's media buying template, updated in June 2023, is a useful checklist for the contract itself. It keeps full audit rights, adds a "Non-transparent Services" section that requires the agency to seek approval before principal buying, and says an agency must obtain the advertiser's prior consent to use AI applications.

Where Thrad fits

Ads inside AI conversations are the newest performance channel, which is why question five is on the list. Agencies manage multiple client accounts on Thrad from one workspace, with full visibility on budgets, pacing, placements and performance, and can give clients secure access to live dashboards. For an agency, that means a new channel to offer clients without a new reporting problem. Read about the agency workspace.

For brands testing the channel before hiring anyone, Thrad's self-serve platform has no minimum spend and takes a campaign from idea to live in under a minute, which puts real numbers in front of you before an agency quotes against them. Our comparison of digital advertising platforms and our programmatic agency guide cover the rest of the buying side. Launch a campaign from self-serve.