“Full service growth” can mean strategy, or it can mean slide decks and a junior in your ad account. Ask which.
Short version: A Shopify growth retainer should buy you decisions and assets: a weekly decision log, named budget and structure changes, a stated number of creative concepts a month, and reporting that includes what went badly. In the UK, fees only, a light arrangement commonly runs £750 to £2,000 a month, a solid growth retainer £2,500 to £6,000, and Plus scale from £6,000 upwards. Commentary without deliverables you can point at is the expensive kind.
Common line items
Most proposals list the same five things. The difference between a good retainer and an expensive one is whether each line produces something you can point at afterwards.
| Line item | What it should produce | How you know it is real |
|---|---|---|
| Account management | A weekly decision log with owners and dates | You can read last week's and see what changed |
| Media buying | Structure changes, budget moves, kill decisions | Named person in the change history, not "the team" |
| Creative | A stated number of concepts shipped per month | Concepts counted, not "creative support" |
| Email / lifecycle | Flows built or edited, campaigns sent | A calendar you can see a month ahead |
| Reporting | What we did, what it cost, what we do next | It contains at least one thing that went badly |
The valuable ones ship decisions and assets. The weak ones ship commentary. A report with no bad news in it is not a report, it is a renewal document.
What "20 hours a month" actually means
Retainers are often priced in hours, then delivered in fragments. Twenty hours sounds like half a week of someone's attention. Spread across four weeks it is an hour a day, and a chunk of that is already committed before anyone opens your ad account:
- A weekly call, plus the writing up around it, is comfortably four to six hours a month gone.
- Monthly reporting is another two to four, more if the deck is pretty.
- Internal coordination, your Slack questions and the odd fire are real hours nobody lists.
What is left is the actual buying, briefing and thinking, and it is usually about half the number on the invoice. That is not a scandal. It is just worth knowing before you judge the output. If you want fewer hours going into commentary, cap the meeting load in the contract and ask for the time back as creative.
Questions worth asking
- Who touches the account week to week?
- What do you need from us to avoid waiting?
- How do you handle stock and offer changes mid-flight?
- What does a kill decision look like when performance dips?
If answers are fog, the retainer will feel foggy at month three.
What a good week actually looks like
Ask any agency for a sample week before you sign. If they cannot produce one, they do not have a process, they have a calendar. A credible week on a mid-size Shopify account looks roughly like this:
- Monday. Read the weekend. Check spend against plan, check which SKUs moved, check what is now thin on cover. Decide the week's budget shape.
- Tuesday. Act on it. Structural changes, new ad sets live, losers paused, exclusions applied where a SKU is burning spend it cannot convert.
- Wednesday. Creative. Brief the next batch against what actually won, not against a trend. Review anything in production.
- Thursday. Check the changes from Tuesday have bedded in. Do not touch learning phases out of boredom.
- Friday. The one that gets skipped: who owns the account over the weekend, and what happens if a hero SKU sells out on Saturday morning.
That Friday question is the one worth pushing on. Most retainers have no answer for it, which is how a brand ends up paying to advertise something it cannot ship for 48 hours. The mechanics of that failure are in ads when stock is thin and days of cover.
What is usually not included
Scope arguments at month three are nearly always about something both sides assumed. Get these named in writing before kickoff:
- Shopify theme and dev work. Growth retainers rarely include real front-end development. "CRO" often means recommendations, not implementation.
- Creative production versus direction. Direction is a brief. Production is a shoot, a studio, models and editing. These are different budgets.
- Marketplaces and wholesale. Amazon, eBay and retail partners are a separate discipline and usually a separate fee.
- Feed and catalogue work. Someone has to own product attributes and feed health. It is often nobody.
- Additional markets or stores. A second storefront is not a rounding error. See multi-store ops.
The first 30 days
Month one is setup, and you are paying full price for it, so hold it to a standard. A good onboarding produces artefacts, not just introductions:
- Access confirmed everywhere, with you retaining ownership of every account.
- A written audit of what they found, including the uncomfortable parts.
- Agreed margin floors, buffer rules and the SKUs that must never be paused.
- A named operator, a named escalation path, and the weekend answer.
- The first decision log, even if the first decision is "change nothing yet".
If day 30 arrives and all you have is a kickoff deck and a Slack channel, the next eleven months are already visible.
Software versus humans
Humans still win at messy strategy and taste. Software wins at overnight monitoring, packaging work, and not forgetting cover days. Many brands want both. Few want to pay agency rates for work a sharper system could stage for approval. That comparison is the whole point of Ralph vs agency.
Red flags in pitches
Guaranteed ROAS. Vague “full funnel”. No named operator. Reporting that only celebrates. If you cannot get a clear stop rule story, keep walking.
Questions people actually ask
Retainer for a small brand?
When spend is high enough and creative supply exists. Not as a substitute for a clear offer.
How much should a Shopify growth retainer cost?
In the UK, a light monthly arrangement commonly lands between £750 and £2,000, a solid growth retainer between £2,500 and £6,000, and Plus-scale delivery from £6,000 upwards. Those are fees only, before ad spend and before separately commissioned creative production. The band matters far less than whether the scope names deliverables you can point at.
What should be in the contract besides the fee?
Minimum term, notice period, ad account and creative asset ownership, and the mechanism for changing scope when you add a market or a second store. Ownership is the expensive one to get wrong: grant access to your accounts, never transfer them.
How do I know in month one whether it is working?
You should have a written audit including the uncomfortable findings, agreed margin floors and buffer rules, a named operator with an escalation path, and a first decision log. A kickoff deck and a Slack channel is not onboarding.
Can software replace a growth retainer?
It replaces the parts that are monitoring and preparation: watching cover, spotting stockouts overnight, staging campaign work for review. It does not replace taste, brand narrative or a hard commercial argument. Most brands past a certain size want both, which is why hybrid is the common landing spot.
How to brief an agency without getting played
Give margin floors, stock constraints, and non-negotiables in writing. Ask for a sample weekly plan before you sign. If they cannot show how they handle a stockout mid-campaign, they have not lived your life yet.
Hybrid models that work
Agency on creative strategy and brand, in-house or software on day-to-day ops and monitoring. Or agency on paid craft, you keep offer and stock policy. The broken hybrid is “everyone owns everything”: which means nobody owns the stockout.
If you want stock, ads and the morning list in one place: that is what we built Ralph for: a growth operator for Shopify, with review before anything ships. Not magic. Fewer tabs. See Ralph · Docs