Best for
Continuous improvement
Live stores that need steady fixes, CRO, and new features without contracting each task.
What an on-demand Shopify retainer is
An on-demand retainer reserves a recurring block of senior Shopify capacity each month. Instead of quoting and contracting every change, you draw from a shared backlog — bugs, CRO experiments, new sections, app work, and roadmap items — prioritised with you each sprint.
It is the lowest-overhead way to keep improving a live store, and the easiest model to scale up or down as your roadmap shifts.
What your retainer ships
A prioritised backlog of fixes, CRO, and roadmap work — real store improvements with clean, reviewed code, every sprint.
What's included
A prioritised backlog
Bugs, performance, CRO, sections and app work — re-prioritised with you every sprint.
Momentum
Work shipped, every sprint
A steady stream of improvements going live — see exactly what changed and when.
Results
Measurable gains
CRO and Core Web Vitals tracked over time, so the store keeps getting better.
How it's billed
A monthly block of hours
A fixed monthly retainer of senior hours; scale it up or down anytime.
How it works
How an on-demand retainer works month to month
A retainer reserves a block of senior Shopify hours for your store every month, ready to spend on whatever moves the needle — a standing team on call instead of quoting each small job.
01
Reserve monthly hours
Choose a block of senior hours sized to how much change your store needs.
02
Prioritise the backlog
Each month starts by ordering the work — fixes, CRO, performance, features, roadmap.
03
We ship in priority order
Senior devs work through the backlog; urgent issues jump the queue.
04
Report & adjust
You get a report on what shipped and hours used, and can scale the block up or down.
Best fit for
- Live, growing stores that need steady, ongoing attention
- Shopify Plus merchants iterating on checkout
- Brands running a continuous CRO programme
- Teams that want a reliable partner without hiring in-house
- Fast escalation for urgent issues (broken checkout, Black Friday)
Good to know
Hours are agreed monthly and reviewed as your needs change — you are never locked into more capacity than you use, and unfinished priorities roll into the next month’s backlog.
Because the same senior team stays with your store month after month, they build deep context — your theme, integrations, and quirks — so each request is faster and safer than briefing a new agency. When a larger, well-defined piece comes up, we can spin it out as a fixed-price project alongside the retainer.
Scale monthlyPriority escalationNo in-house overhead
Ready for an on-demand Shopify team that improves your store every sprint?
Most retainer clients stay with Mgroup for 12+ months. An on-demand Shopify retainer gives you a prioritised backlog of fixes, CRO experiments, and roadmap work — shipped by senior Shopify developers every sprint — so your store keeps getting measurably faster, cleaner, and higher-converting.
Reserve capacityFrequently asked questions
Common questions about this engagement model.
Whats the minimum retainer?
Retainers start from a small monthly block of senior Shopify hours and scale up as your roadmap grows. There is no large upfront commitment.
What happens to unused hours?
Unused scope rolls into the next sprint within the billing period, so you never lose value paid for.
How is work prioritised?
You keep a shared backlog and we re-prioritise it together each sprint — urgent fixes first, then CRO and roadmap items.
Can we pause or cancel?
Yes. Retainers are flexible month to month — scale down, pause, or stop as your needs change.
Is this different from a fixed-price project?
Yes. A fixed-price project locks a defined scope and budget; a retainer is continuous, flexible capacity for evolving work.
How much does an on-demand Shopify retainer cost?
Retainer pricing scales with the monthly block of senior Shopify hours you reserve — start small and adjust as your roadmap grows, with no large upfront cost. Request a quote to hire an on-demand Shopify team for continuous fixes, CRO, and roadmap work.