The short version
- Most merchants pick the wrong Shopify agency for three reasons: they choose on price, they judge by how a portfolio looks, and they never ask who will actually build the project.
- Seven questions tell you more than a portfolio review. The most revealing one is "Walk me through a project where something went wrong."
- The red flags that matter most are a quote with no questions attached, timelines in phases instead of dates, and a build made of stacked apps.
- A usable quote needs a usable brief: your current stack, the goal, integrations, markets, traffic, timeline pressure and a budget range.
Cost and Shopify Plus pricing last verified on October 15, 2026.
BrainBox Infoway is a Shopify agency, so weigh what follows accordingly. We wrote the guide we would want a merchant to read before they talk to any agency, including us. If you are comparing Shopify development agencies right now, every question in this guide works on all of them.
Why Most Merchants Pick the Wrong Agency
The mistake isn't choosing a bad agency. The mistake is choosing an agency for the wrong reasons.
Price is the most common one. A merchant gets three quotes, picks the middle number, and assumes that covers them. It rarely does. Shopify projects with custom theme work, third-party integrations or checkout engineering have a lot of surface area that stays invisible in a proposal until something breaks after launch.
The second mistake is portfolio pattern-matching. A merchant sees a beautiful store in a portfolio and assumes the agency built it well, not just beautifully. Design and development quality are different things. A store can look polished and still run on fragile code, slow load times and app dependencies held together with workarounds.
The third mistake is not asking who will actually work on the project. Senior developers show up on the discovery call. Junior developers execute the build. That gap is standard practice at a lot of agencies, and it is rarely disclosed upfront.
Avoiding all three doesn't take a deep technical background. It takes the right questions.
What to Look for in a Shopify Development Partner
The short list:
Shopify-specific depth. A Shopify development agency should know the platform at the architecture level: how the theme system, Liquid templating, Checkout Extensions, Shopify Functions and metaobject schemas actually work. Installing apps and editing an existing theme is not the same skill. Ask for examples of custom Liquid development, app integrations they have built, or Functions-based discount logic they have shipped.
Honest scoping. Good agencies scope honestly and price accordingly. If a proposal comes back within 24 hours with a fixed price and no clarifying questions, treat that as a signal. Real scoping takes conversation. Real pricing has line items.
A clear communication structure. Project communication is where most agency relationships break down, more often than technical capability. Ask how projects are managed, who your single point of contact is, what the check-in cadence looks like, and how scope changes are handled.
Evidence of post-launch results. Any agency can show a launched store. Fewer can show what happened to conversion rate, page speed or revenue six weeks later. Case studies with outcome data, even rough figures, are a stronger trust signal than a polished portfolio.
Market-appropriate experience. If you sell in the US, EU or Australia, your partner should know how checkout flows, payment gateways, tax configuration and shipping rules behave in your specific markets. These are not details. They affect revenue directly.
Awareness of platform changes. Shopify retires things on a schedule, and an agency that builds and walks away won't tell you. Two live examples as of October 2026: script tags stop loading on storefronts on March 1, 2027, and API version 2025-10 is already unsupported, which means apps pinned to it are silently served by a newer version. Ask any agency what they are doing about both on stores they have already delivered. Our guides on Shopify script tag migration and the Shopify API 2026-10 upgrade checklist show what a competent answer looks like.
Also decide early whether you need an agency at all. A freelancer is the right call for a contained task, and an agency is the right call once the project needs design, development, QA and project management working in parallel. We break that choice down in Shopify freelancer vs agency: who to hire for which project.
The Questions Worth Asking Before You Sign Anything
These seven questions will tell you more than a portfolio review:
- Who will be doing the actual development work on my project? Not "who do you have on the team." Specifically, who will be assigned to this project, and what is their experience level with Shopify.
- Can you show me the Liquid code on a project similar to mine? Not a live site. The code. Any reputable agency will share anonymised samples on request.
- How do you handle scope changes mid-project? This will happen. The process for handling it matters more than the promise that it won't.
- What does your QA process look like before a store goes live? Checklists, devices tested, performance benchmarks. If the answer is vague, the QA is vague.
- What happens if something breaks in the first 30 days after launch? Post-launch support is often an afterthought in contracts. Know what you're covered for before signing.
- Can you walk me through a project where something went wrong, and how you handled it? This is the most revealing question on the list. Good agencies have honest answers. Bad ones don't.
- What's included in the handoff? Documentation, training, code ownership, admin access. The handoff is where a lot of merchants get stuck with a store they can't maintain.
The question matters less than how it gets answered. Here is what separates a good answer from a bad one:
| Question | A good answer sounds like | A bad answer sounds like |
|---|---|---|
| Who builds my project? | Names, or role levels, with their Shopify experience and a named point of contact | "Our senior team," with no names or levels |
| Can I see Liquid code? | Anonymised samples or a code walkthrough call | A refusal, or only live sites |
| How do you handle scope changes? | A written change-request process, with an estimate before work starts | "We're flexible" |
| What does QA look like? | A checklist, a device matrix, performance targets and a staging sign-off | "Our team tests everything" |
| What if something breaks in 30 days? | A defined window, response times and a clear list of what is covered | Silence, or hourly billing from day one |
| Tell me about a project that went wrong. | A specific story, the cause, and what changed in their process afterwards | "We haven't had any problems" |
| What is in the handoff? | Documentation, a training session, and the repository and admin access transferred to you | A launch email and nothing else |
Red Flags That Are Easy to Miss
A proposal with no questions attached. If an agency sends a detailed quote without asking for a brief, design files, app stack, current traffic or target markets, they are quoting on assumptions. You'll pay for the gaps later.
Vague timelines expressed in phases. "Phase 1 takes 3 to 4 weeks" is not a timeline. A timeline has milestone dates and deliverables attached to each one.
Over-reliance on apps for everything. Some agencies build by layering apps: a subscription app, a bundle app, a loyalty app, a review app. Each one adds JavaScript to your storefront, slows page load and creates a dependency. Custom code is often the better long-term call for anything business-critical.
No clear process for managing your existing store. If you are migrating from an existing store or rebuilding on the same Shopify account, ask how they plan to handle live traffic, product data, SEO redirects and the cutover. Agencies that haven't done this before often underestimate it.
Testimonials but no case studies. Testimonials are easy to collect. Case studies with specific outcomes are harder to fake. Many testimonials and no case studies is worth noting.
How to Scope a Project So You Get an Accurate Quote
An accurate quote requires an accurate brief. It doesn't need to be a formal document, but it needs to answer:
- What is the store currently running on? (Platform, theme, app stack)
- What is the primary goal of the new build? (Launch, redesign, migration, a specific feature)
- Which integrations need to be maintained or built? (ERP, CRM, fulfilment, marketing)
- What markets and currencies does the store operate in?
- What are the revenue and traffic figures? (They set performance expectations.)
- What is the timeline pressure, if any?
- What is the rough budget range?
If you want a starting point, use our Shopify project brief template.
Budget transparency is the one merchants are most reluctant about, and it is the most useful thing an agency can receive. A well-run agency won't price to your ceiling. It will use the number to tell you what is and isn't achievable within it, and let you make the call.
What does Shopify development cost?
These are market ranges, not BrainBox quotes. They show how scope moves the number.
| Project type | Typical market range (USD) | Typical timeline |
|---|---|---|
| Theme customisation | $3,000 to $8,000 | 4 to 8 weeks for a theme-based store with moderate customisation |
| Full custom store build | $10,000 to $30,000+ | 10 to 16 weeks with a custom Liquid theme, several integrations and checkout engineering |
| Shopify Plus migration or custom app development | $50,000+ | Scoped per project |
Shopify's own fees sit on top. Shopify Plus starts at $2,300 a month on a three-year term or $2,500 a month on a one-year term, and higher-volume businesses move to a variable platform fee that Shopify doesn't publish. Apps and payment processing are extra again.
One habit saves merchants real money: ask for the hourly rate and the estimated hours behind any fixed price. A quote that can't be broken into hours and deliverables is a guess. We cover the full build-up in how much Shopify development costs in 2026.
What a Good Agency Engagement Actually Looks Like
A well-structured Shopify project follows a consistent sequence:
- Discovery. The agency asks questions, audits what exists, and maps the gap between current state and desired outcome. This typically takes one to two weeks and ends with a scope document.
- Design. Wireframes and high-fidelity designs, reviewed and approved before development begins. Good agencies don't start building from a verbal description.
- Development. Built against the approved designs, with a staging environment you can access throughout. You are not seeing the project for the first time at launch.
- QA. Device testing, performance benchmarking and functional testing across your specific integrations. It happens before handoff to you, not at the same time.
- UAT. You review the project on staging. Feedback is consolidated and addressed. This is a defined phase, not an ongoing loop.
- Launch and handoff. A structured go-live, not just flipping a domain. It includes a handoff session, documentation and a post-launch monitoring window.
If an agency's process looks significantly different, ask why. The answer tells you something.
How should you structure payments?
Tie payments to milestones, not to dates. A common structure is a deposit at kickoff, a payment at design approval, a payment when the staging build is delivered, and a final payment at launch. For example, 30%, 30%, 30% and 10%, with the last slice released after a short post-launch window. That split is an example, not a rule, but the principle holds: the agency should have a reason to finish the handoff properly, and you should never have paid for work you haven't seen on staging.
The work doesn't end at launch. Apps and themes need updates, and platform deadlines keep arriving. That ongoing work is what a Shopify maintenance and support retainer covers, and it is worth agreeing on before the build starts. When you are ready to talk specifics, see our Shopify store development service, or if you are on the Plus plan, Shopify Plus development. You can also browse our work to see outcomes rather than screenshots.
Common Questions About Hiring a Shopify Agency
How much does Shopify development cost?
Shopify development costs vary significantly with project scope. A theme customisation project typically runs between $3,000 and $8,000, a full custom store build is usually $10,000 to $30,000+, and a Shopify Plus migration or custom app development project can exceed $50,000. The most accurate way to get a real number is to brief the project in detail, because agencies pricing without a brief are guessing.
How long does it take to build a Shopify store?
A theme-based Shopify store with moderate customisation takes 4 to 8 weeks from kickoff to launch. A full custom build, with a custom Liquid theme, multiple third-party integrations and checkout engineering, takes 10 to 16 weeks. Timelines compress when the brief is clear upfront and expand when scope changes mid-project.
What is the difference between a Shopify Expert and a Shopify development agency?
A Shopify Expert is typically a freelancer or small studio listed in Shopify's partner directory. A Shopify development agency has a team of designers, developers, QA and project managers who can handle larger, more complex projects at the same time. For a simple theme tweak an Expert may be enough. For a full store build or a Shopify Plus project, an agency with dedicated resources is the more reliable choice.
Can a Shopify development agency work on my existing store without disrupting live traffic?
Yes, and it is standard practice. Development happens on a staging theme or a development environment while the live store keeps operating normally. The cutover happens during a scheduled launch window, typically off-peak hours for your market.
What is Shopify Plus and do I need it?
Shopify Plus is Shopify's enterprise plan, starting at $2,300 a month on a three-year term or $2,500 a month on a one-year term, with a variable platform fee for higher-volume businesses. It adds customization of the checkout's information, shipping and payment steps, custom-app Shopify Functions, B2B features, dedicated support and higher API limits. As a rule of thumb, most brands don't need Plus until they reach roughly $500,000 to $1 million or more in annual revenue and hit a limit the standard plans can't solve.
Is BrainBox Infoway a certified Shopify agency?
BrainBox Infoway is a Shopify Partner. The agency was founded in 2023, and its founding team has been building on Shopify since 2014. The team of ~20 Shopify specialists works across store development, Shopify Plus, custom app development, AI automation and migrations for merchants in the US, EU, AUS, and CAN.