What to look for in a full-service Amazon agency: the complete checklist (2026)

A full-service Amazon agency should prove 7 things: named case studies, daily optimization, TACoS reporting, senior account managers, 1 account manager, written scope, and a guarantee. TACoS (total advertising cost of sales) is ad spend divided by total revenue, organic sales included. The label itself guarantees none of the 7. Ask every agency whether it means daily hands-on management by senior account managers or periodic check-ins by a junior coordinator.

The difference between those 2 realities is the difference between an Amazon channel that compounds and one that flatlines. Olifant Digital manages $100M+ in annual Amazon client revenue across 50+ Amazon accounts, with 98% client retention. This checklist gives you 7 criteria to evaluate any agency before you sign, plus the specific questions to ask so you get honest, specific answers.

TL;DR

• Check 7 criteria before signing. Named case studies, daily optimization, TACoS reporting, senior account managers, 1 account manager, written scope, and a guarantee with clear exit terms.

• Demand 3 to 5 case studies. Each one should name the client, the metric, and a timeframe, ideally in your product category.

• TACoS shows the full picture. Onsen Secret tripled its Amazon profit and added $95,934 in monthly revenue after we rebuilt the account around TACoS and profit.

• Senior means 7 years minimum. Confirm who manages your account before you sign; every Olifant Digital account manager has at least 7 years of Amazon experience.

• Read the cancellation terms. Check the notice period, minimum term, auto-renewal, and exit fees before you sign, so you know what leaving will cost.

What "full-service" actually means on Amazon (and what it doesn't)

Ask every agency what "full service" includes in its contract. It should mean full-service Amazon account management: an agency that manages your entire Amazon account, including ads, listings, content, account health, and reporting.

This includes PPC management across Sponsored Products, Sponsored Brands, and Sponsored Display, plus Amazon DSP for display and video ads. It also covers copywriting, SEO optimization, A+ Content, Brand Store management, account health monitoring, launch strategy, and performance reporting.

Keep in mind that an agency calling itself "full service" doesn't mean the work is done well, or even done often. Ask how often the work happens and whether a senior account manager does it. The table below sets what full service should cover against what the label does not guarantee.

Read the table as scope vs execution: the left column is what you buy, the right column is what you have to verify.

From our accounts: in every one of the 11 accounts we checked during audits, 10% to 68% of ad sales landed on a different product from the one in the ad, mostly a sibling variation. When one team runs the ads and another runs the catalog, nobody owns that overlap. This is why full service should mean one team running the whole Amazon business, not only the ads.

Which Amazon ad types should a full-service agency manage?

A full-service agency runs every Amazon ad type as one system and moves budget to whichever format returns best for each product.

If an agency only runs Sponsored Products, you miss brand defense and most new-to-brand sales.

From our accounts: across the accounts we manage, 87% of Sponsored Brands sales and 78% of Sponsored Display sales came from shoppers new to the brand, with Sponsored Display at a 21% ACoS. Sponsored Products alone would not have reached most of those buyers.

The 7-point checklist for a full-service Amazon agency

Score every agency you evaluate against these 7 criteria.

1. Named case studies with real numbers

2. Daily campaign optimization

3. TACoS-first reporting

4. Senior managers doing the work

5. One manager, no revolving door

6. Channel scope in writing

7. Guarantee and cancellation terms

1. Named client case studies with specific, verifiable numbers

The real test of an agency's results is whether it can give you a client name, a metric, and a timeframe.

A vague claim like "we grew a supplement brand by 40%" is unverifiable and ultimately meaningless. Compare it with something specific like "Elite Jumps: 124% revenue growth in 3 months with a 51% conversion rate lift." That kind of detail is citable, checkable, and gives you a real sense of what the agency can do.

When you evaluate an agency, ask for 3 to 5 named case studies, ideally in your product category or an adjacent one. If they can't produce them, or they pivot straight to testimonials, aggregate numbers, or anonymized results, treat it as a sign the results may not exist. Our named Amazon case studies show the format to expect.

Then check the agency's listing in the Amazon Ads partner directory, which lists each partner's service offerings, expertise levels, and supported marketplaces. According to Amazon Ads, Verified status reflects completing Partner Network registration, account setup, and a directory listing. Advanced status requires at least 2 sponsored ads certified users and sponsored ads spend in the 95th percentile of partner-led investment.

Amazon Ads also notes that it has paused status decisions through Q4 2026, so treat status as 1 data point next to named case studies.

For reference, these are Amazon results on accounts we manage: Wedge Guys +391% sales and #1 in its golf category, Balanced Tiger +171% revenue with ACoS cut 50% in 2 months, Bullstrap +85% monthly revenue, and Spade to Fork +46% revenue in 44 days. Named, with a metric, and checkable.

From our accounts: year-over-year results on accounts we manage today: Dreamfarm UK +328%, Eye on Ball +113%, BenchFoods +84%, Purist Company +70%, Novalogy (US) +66% and Dreamfarm US +45% (Amazon sales, January to September 2026 vs 2025, Seller Central).

"After trying dozens of different agencies and attempting to manage Amazon internally, nothing clicked until we partnered with Olifant Digital. Their strategy has driven a significant increase in sales and conversion rates."

Jordan Lindstrom, CEO at Elite Jumps

2. Daily campaign optimization

Amazon Ads runs billions of auctions each day, according to its own auction documentation. Amazon's 2025 annual report shows advertising services revenue of $68.6 billion, up from $56.2 billion in 2024, and Amazon's Q4 2025 earnings release shows third-party sellers accounted for 61% of worldwide paid units. That is the auction your agency bids into every day.

In our experience managing Amazon accounts, competitor bids, search trends, and rank signals shift between every check-in. That's why Olifant Digital reviews client campaigns every day.

We treat a product launch as the period when daily review matters most. Amazon Ads' guide, Launching new products and ASINs with Amazon Ads, notes that single-product video ads can increase visibility and glance views "to help boost organic rankings." The same Amazon Ads guide notes that "Optimizing your campaigns is an ongoing process."

Ask the people in charge of your account how often the specialists touch the campaigns and what a daily optimization workflow looks like for your account. If the answer is vague, or they describe a mostly automated setup with periodic human review, take note.

You can measure the result of daily work. Olifant Digital's analysis of 50+ managed accounts found that in the median account, only 4.8% of Sponsored Products spend goes to search terms with 10+ clicks and no sale. Weekly reviews give wasted spend 7 days to build between check-ins.

3. TACoS-first reporting

Start with the distinction between ACoS and TACoS.

ACoS measures your ad spend against ad-attributed revenue, which you can check with our Amazon ACoS calculator. TACoS measures ad spend against total revenue, which also includes organic sales. Run your own numbers with our Amazon TACoS calculator.

Here is the math on a simple example. Spend $1,000 on ads that drive $4,000 in ad-attributed sales, inside $10,000 in total sales. ACoS is $1,000 ÷ $4,000 = 25%. TACoS is $1,000 ÷ $10,000 = 10%.

This matters because an agency that only reports ACoS can look efficient on paper while your organic rankings stagnate and total revenue flatlines.

TACoS is the correct measurement for finding out whether your paid spend is actually building the brand or just replacing organic sales you would have gotten anyway.

Onsen Secret is a clean example. When they started working with us, we rebuilt the account around TACoS and profit instead of ACoS alone. Amazon profit tripled, and monthly revenue grew by $95,934. The whole strategy changed because the full picture finally became visible.

If a prospective agency doesn't mention TACoS, ask them why.

TACoS also shows profit wins that ACoS misses. Balanced Tiger grew revenue 171% while we cut its ACoS by 50% in 2 months, so ad spend became a smaller share of a larger business.

From our accounts: on Inito, an 8-figure fertility-tech brand, Sponsored Products ACoS went from 17.4% to 15.1% after we took over in August 2026, while year-over-year Amazon sales growth went from 82% to 114% (Seller Central). That is the pattern TACoS reporting is built to show.

4. Senior account managers doing the actual work

Confirm that the person in the agency pitch is the same person who will manage your account after onboarding. Ask questions like "Who will manage my account?", "How many years of Amazon experience do they have?", and "Can I speak with them before committing?"

At Olifant Digital, every account manager has a minimum of 7 years of Amazon experience. We do not staff juniors, and you meet the exact team before you sign. That hiring standard applies to every account we manage.

Ask about workload as well as seniority. At Olifant Digital, each account manager manages 5 to 6 brands, so senior people have time to work every account daily.

5. Account manager continuity

Account manager turnover is one of the first things to check, because every handoff costs you ramp-up time.

Read verified reviews on platforms like Clutch before you sign: repeated mentions of new account managers within a single year signal a pattern. Across the broader advertising industry, the ANA and the 4As report that the average client-agency relationship now lasts about 7 years, up from 3.2 years in 2016. The same ANA report found integrated full-service agency relationships last 7.3 years on average, against 3.7 years for media-only agencies. The longer you stay with an agency, the more account manager changes you're likely to live through.

With every handoff, knowledge about your brand slowly gets lost, and you pay for the ramp-up time every time a new manager takes over.

Ask any agency you plan to work with 2 things: what is your account manager turnover rate, and what happens if my account manager leaves? A strong agency has a clear and confident answer. A weak one will deflect or change the subject.

Ask how the agency communicates week to week. At Olifant Digital, every client gets a dedicated Slack channel for day-to-day work and a weekly call to review results and decide next steps, so knowledge about your brand sits with a team you talk to every week.

"What impressed me the most were the results Olifant delivered and the way they communicate with me and my team. Their team uses Slack to keep everything clear, and the communication is super quick."

Nick Eddie, Managing Partner at Rainbow Chalk (case study)

6. Cross-channel coverage or a clearly defined Amazon-first strategy

Ask whether the agency is Amazon-only or manages Amazon alongside other channels like Meta, Google, email/SMS, CRO, and SEO.

There is nothing wrong with either model, but you need to be clear on what you're getting. If an agency only covers Amazon, that could become a limitation if you decide to expand later.

Before you sign anything, ask for the full channel scope in writing. More importantly, ask which channels are handled by their senior in-house team and which ones get subcontracted out. This distinction tells you where the agency's real strength is.

At Olifant Digital, full service means we run the whole Amazon business, not only the ads: PPC across Sponsored Products, Sponsored Brands, Sponsored Display and Amazon DSP, listings and A+ Content, catalog management, product photography and video, A/B testing, inventory management and reimbursement claims. For brands that also sell on Walmart, Target, Shopify, Meta or Google, the same senior team covers those channels.

7. A performance guarantee and transparent cancellation terms

A performance guarantee signals that the agency is confident in its execution. Olifant Digital backs every engagement with a 60-day money-back guarantee: if you're not happy in the first 60 days, we refund your management fees. If an agency you're evaluating offers no guarantee, ask them why not.

Before signing anything, ask for the cancellation policy in plain English: how much notice is required, what happens to your campaigns during the notice period, and whether there are any exit fees. Olifant Digital contracts are month to month, with no lock-in.

Read the fine print for notice periods, minimum terms, auto-renewal, and exit fees before you sign.

What questions should you ask a full-service Amazon agency before you sign?

There are certain questions you need to ask an agency in your first meeting.

An agency that responds with confidence and specifics is worth your time. One that stays vague and avoids clear answers is telling you everything you need to know.

1. Can you share case studies in my category with specific numbers and timeframes?

2. Who will manage my account, and how many years of Amazon experience do they have?

3. How often do your specialists touch my campaigns, and what does daily optimization look like?

4. Do you report TACoS alongside ACoS?

5. What is your account manager turnover rate, and what happens if my account manager leaves?

6. What channels do you cover, and which are handled by your senior in-house team vs subcontractors?

7. What does your performance guarantee look like, and what are the exact cancellation terms?

8. What do the first 90 days look like, and what should I expect to see by day 30, 60, and 90?

Use these questions to get a clear picture of the agency and how it works.

The red flags that override a good pitch

Sometimes an agency has a well-prepared pitch, but once you start asking the right questions, everything falls apart.

Here are the signals that should make you pause, no matter how good the presentation is:

• No named case studies. If the agency can only offer testimonials, aggregate numbers, or anonymized references such as "a brand in your category," it probably doesn't have real results.

• They cannot confirm who will manage your account before you sign. If the person doing the work on your account is a mystery until after you sign the contract, that's a risk.

• Reporting only shows ACoS, with no TACoS or organic data. Ask for a sample report from another account. If TACoS is missing, the agency might not be tracking the full picture.

• Vague answers on optimization frequency. "Our account managers adjust bids and budgets daily" is a commitment. "We monitor campaigns regularly" is a vague promise.

• No performance guarantee and no clear cancellation terms. If cancellation clauses are buried in the fine print, or there is no accountability mechanism at all, proceed carefully.

• Public reviews mention high account manager turnover. Check public reviews before signing anything. Patterns of frequent handoffs tell you what sellers actually experience.

• The pitch deck is polished but the sample report is thin. Compare the sample report with the pitch deck. If the report is weaker, that tells you where the agency invests its effort.

Two more red flags you can check with numbers: more than 10% of Sponsored Products spend going to search terms with 10+ clicks and no sale, and negative keywords added on a flat dollar rule instead of clicks and margin.

How much should a full-service Amazon agency cost?

Price depends on catalog size, number of marketplaces and scope. Compare the pricing model as well as the number, because the model decides what the agency is paid to do.

A cheap PPC-only engagement usually leaves out listings, catalog and operations. That work then lands on your team, or you hire for it and the saving disappears.

Olifant Digital's services start from $2,000 per month and are custom for each project, based on the complexity and workload required. There are no fees tied to your ad spend, contracts are month to month, and every engagement comes with a 60-day money-back guarantee: if you're not happy in the first 60 days, we refund your management fees.

Who shouldn't hire a full-service Amazon agency yet?

Full service is built for established brands with sales volume to scale. Three situations call for something smaller first.

Pre-launch and very early brands

Below about 10 sales a day there is not enough data to optimize against, so you pay a full monthly fee for decisions made on thin data. Start with a one-time Amazon account audit and come back once demand is stable.

Brands without margin to absorb ad spend

Advertising does not fix unit economics. It shows them faster. Work out your break-even ACoS before you hire anyone: a product with a 35% contribution margin has room to bid for rank, while at 15% it spends almost the whole margin to win a sale.

From our accounts: in 10 of the last 15 account audits we ran, the brand had no break-even ACoS set for its products, so nobody could say which campaigns made money.

Brands that need one deliverable

If you only need a listing refresh or an audit, a project fee covers it. A monthly engagement is for ongoing work, so paying one for a task with a clear end means paying every month for something you need once.

How Olifant Digital measures up against the checklist

Olifant Digital built this checklist on what actually separates high-performing agencies from the ones that underdeliver. Every product gets its own plan with a target TACoS, target ACoS, keywords, and a profit goal, tracked daily at the SKU level. Account managers act the same day on every flag from our in-house AI platform, Olifant AI.

Campaign architecture follows the 1-1-1-1 Scaling Method. Brands that move to us average 91% year-on-year growth, with 98% partner retention. On accounts we manage today: Dreamfarm UK +328%, Eye on Ball +113%, BenchFoods +84%, Purist Company +70%, Novalogy (US) +66% and Dreamfarm US +45% (Amazon sales, January to September 2026 vs 2025, Seller Central).

Our in-house platform, Olifant AI, analyzes every account daily and flags spend, budget and scaling decisions against each brand's profit margin target, so our senior account managers act the same day. Every strategy is backed by performance data from 50+ Amazon accounts.

On Clutch, Olifant Digital is rated 5.0 from 20 verified reviews as of October 2026.

"Systematic approach. I see them as business partners and not just an agency."

Doron Santo, CEO at Onsen Secret

Key takeaways

• Seven proof points decide the hire. Named results, daily optimization, TACoS reporting, senior staff, 1 manager, written scope, and a guarantee.

• Case studies need names. Expect 3 to 5 examples with a client name, a metric, and a timeframe, or treat the claims as unproven.

• ACoS alone hides profit. After we rebuilt Onsen Secret's account around TACoS and profit, its Amazon profit tripled and monthly revenue grew by $95,934.

• Experience is a hiring standard. Olifant Digital account managers bring 7+ years of Amazon experience, so expect to meet yours before you sign.

• Exit terms belong in writing. Get the cancellation policy in plain English, covering notice length, lock-in period, renewal terms, and the cost of leaving.

Frequently asked questions

What does a full-service Amazon agency do?

A full-service Amazon agency handles everything related to your Amazon account so you don't have to.

This typically covers ads (including Amazon DSP), keyword research, bid optimization, listing optimization, A+ Content, Brand Store management, account health monitoring, and performance reporting.

A PPC-only agency manages bids, budgets, and keywords. A full-service Amazon agency also owns listings, A+ Content, catalog, and account health, so paid traffic lands on pages built to convert. The strongest ones also run product launches. Always make sure the agency delivers a written scope of services before you commit to a contract.

How do I evaluate an Amazon agency?

Use a 7-point framework: named case studies with specific numbers, daily optimization cadence, TACoS-first reporting, senior account managers doing the actual work, account manager continuity, clearly defined channel scope, and a performance guarantee with transparent cancellation terms.

Ask every prospective agency the same questions and compare their answers. An agency that gives weak answers on any of these 7 points deserves a closer look before you sign.

What is the difference between ACoS and TACoS?

ACoS measures your ad spend against ad revenue only, whereas TACoS measures it against your total revenue, which also includes organic sales. If an agency only reports ACoS, you're only seeing half of the story.

How much does a full-service Amazon agency cost?

Olifant Digital's services start from $2,000 per month and are custom for each project, based on the complexity and workload required. There are no fees tied to ad spend, and the work covers daily optimization, TACoS reporting, listings, catalog and senior account management.

Agencies price in different ways. The Amazon Ads partner directory lets you filter partners by pricing model and minimum monthly spend, so compare like with like.

Ask for a written scope that explains what the price covers.

What is a good client retention rate for an Amazon agency?

98% client retention at Olifant Digital.

Ask the agency how long its clients typically stay, and request references from current clients. Olifant Digital has 98% client retention. Retention is one of the clearest proxy metrics for real performance, because it reflects what clients actually do after the pitch.

When should you hire a full-service Amazon agency?

Hire a full-service Amazon agency when revenue and ad spend rise at the same rate and TACoS creeps up, eroding your margin. It's also time to hire when your catalog runs on a single blended target, listings convert poorly, or a past agency has plateaued the account.

The same goes for expanding into new marketplaces such as Europe, the UK, Australia, or Japan. It's the wrong move for pre-launch or early-stage brands.

If you want a full-service Amazon agency that answers yes to every item on this checklist and proves it with named results, get your free marketing plan. We'll audit your account and show you exactly where the opportunity is.