The short answer
In 2026, a Shopify maintenance retainer in the UK typically costs between £500 and £3,000+ per month. Small stores that mostly need fixes sit at the lower end. Growing brands shipping new sections, landing pages and campaigns every month usually pay £1,200 to £2,500. Shopify Plus stores with ERP integrations, private apps or checkout extensions often go beyond £3,000.
The price depends less on the size of your store than on the pricing model. That is what decides what you actually get for your money.
The three pricing models
1. Hour banks
You buy a block of hours each month. It is the most common model in the UK. The catch: the agency is paid for time, so it has no financial reason to move fast, every request gets logged against your balance, and unused hours are often lost.
2. Reserved development days
You book one to five development days a month, often on an annual contract. It suits a predictable roadmap, less so urgent fixes: a request that lands after your reserved day waits until next month.
3. Unlimited-request retainers
You pay a flat monthly fee, send as many requests as you like, and they are handled one at a time with a guaranteed turnaround (often 48 to 72 hours per request). No hour tracking. The agency's incentive is to ship fast and move on to the next one. It is the most predictable model for brands with a permanent backlog.
What drives the price
- The type of work included: maintaining what exists costs less than building new sections, landing pages or integrations.
- The guaranteed turnaround: a four-hour response and 48-hour delivery cost more than “next sprint”.
- Shopify or Shopify Plus: checkout extensions, B2B, Markets and Functions need more specialised skills.
- Integrations: ERP, WMS, CRM and private apps are the heaviest line.
- Contract length: from rolling monthly to twelve months. Longer commitments usually lower the monthly fee.
How Meelz prices it
Meelz is a Shopify Partner (Select tier) since 2019, specialised in fashion, lifestyle and home brands. Our retainer is a flat monthly fee in GBP with unlimited requests, each shipped within 48 working hours and tested on a duplicate theme before going live. All code belongs to you. The first request is free, no card required. See the UK retainer.
Five questions to ask any Shopify agency
- What is the guaranteed delivery time per request, not just the response time?
- What happens to unused hours or days?
- Are changes tested on a duplicate theme before going live?
- Do I own the code, and can another developer take over?
- How long is the minimum commitment, and how do I cancel?
FAQ
Do I need a maintenance retainer on Shopify?
Not strictly. Shopify handles hosting, security and platform updates. A retainer covers what remains yours: the theme, apps, tracking, performance and every change your marketing team needs.
Is a freelancer cheaper than an agency?
Often per hour, not always per month. A freelancer is one person with holidays and other clients. An agency can guarantee continuity and turnaround, which matters most during sales and Black Friday.
Can I keep my current agency and add a retainer?
Yes. Many brands keep their build agency for big projects and use a retainer for urgent fixes and small changes that cannot wait for the next sprint.
