Your London DTC brand outgrew the Shopify theme at subscriptions, bundles, and post-Brexit VAT
Custom Shopify development in London typically costs £35k to £130k over 2 to 6 months. You go custom when a theme can't model your real commerce: subscriptions, bundles, B2B pricing, and the post-Brexit VAT and fulfilment reality of selling from London into the EU. For a London brand, the trigger is usually the day a stack of apps each charging monthly starts conflicting and your checkout breaks.
A premium Shopify theme got your London brand looking sharp and selling fast, and that was the right start. But growth exposed the limits: you bolted on a subscriptions app, a bundles app, a B2B app, and a tax app, and now they fight each other at checkout, each takes a cut, and a theme update breaks two of them. Your developer spends more time refereeing app conflicts than building anything.
Then there's the London-specific reality. Selling DTC from the UK into the EU after Brexit means VAT registration thresholds, IOSS, customs, and fulfilment logic that template stores simply don't handle. Your checkout needs to do the right thing for a customer in Paris versus one in Manchester, and a stack of generic apps can't reliably make that call. The theme that launched you can't carry the operation you've become.
Budgeting a shopify build in London
| Project scope | Typical cost | Timeline |
|---|---|---|
| Custom Shopify functionality replacing conflicting apps | £35k to £70k | 2 to 4 months |
| Headless or deeply custom storefront with B2B + DTC | £80k to £130k | 4 to 6 months |
| VAT/IOSS and EU fulfilment logic module | £25k to £50k | 2 to 3 months |
The case for owning your shopify
A London brand selling subscriptions, bundles, and B2B into both the UK and EU has commerce logic no theme ships with. Custom Shopify development replaces the conflicting app stack with purpose-built functionality: a subscription model that fits your product, bundle logic that doesn't break the cart, and VAT and IOSS handling that does the right thing per destination. You stop paying five apps to half-solve the problem and stop firefighting theme conflicts, with a store that fits your real commercial model.
- Conflicting apps are breaking your checkout or each taking a per-order cut
- Post-Brexit EU VAT and customs logic isn't handled correctly by your current setup
- You need B2B and DTC to coexist and theme apps can't manage it cleanly
- Theme updates routinely break your store and maintenance has become firefighting
- Your catalogue is simple and you sell mostly within the UK
- A theme plus one or two well-behaved apps covers your needs
- You're early and validating demand before investing in custom commerce logic
- Subscriptions, bundles, and B2B aren't part of your model
What your build should include
London shopify: the full scope
Everything a shopify build here can cover: Shopify migration, Shopify checkout customization, Liquid development, ecommerce development, payment gateway integration, Shopify Plus development and custom Shopify themes.
Delivery, week by week
Exactly what you get
A Shopify store that fits your real commerce instead of a theme plus five fighting apps. Custom subscription, bundle, and B2B logic built into the store so checkout stops breaking and you stop paying per-order app fees. Destination-aware VAT, IOSS, and customs handling so a Paris order and a Manchester order each do the right thing. And integrations with your inventory, accounting, and fulfilment so the storefront is the front of a coherent operation, not an island.
How to choose a developer in London
Pick a Shopify partner who has shipped DTC brands selling into the EU and can talk fluently about IOSS, VAT thresholds, and customs, because that's where London brands get caught. Ask them to audit your current app stack and tell you honestly which apps to keep and which to replace with custom code; a good partner won't rebuild what already works. Tie the store to your inventory management software, accounting software, and warehouse management plans so commerce, stock, and books stay in sync.
- Custom subscription, bundle, and B2B logic that doesn't conflict at checkout or charge five monthly fees
- Correct post-Brexit EU VAT, IOSS, and customs handling per destination
- Theme updates stop breaking your store because the logic isn't a stack of fragile apps
- DTC and B2B pricing coexist cleanly in one storefront
- Checkout and fulfilment tuned to your real London-to-EU operation
- Custom Shopify functionality costs more up front than installing another app
- You own maintenance of custom code through Shopify's platform updates
- Some app-store features are genuinely good; replacing them all can be over-engineering
- If your catalogue and tax situation are simple, a theme plus a couple of apps is the cheaper right answer
- !They reach for another app for every requirement; ask what they'd build versus install
- !No grasp of post-Brexit EU VAT and IOSS; ask how they handle a Paris order's tax
- !They ignore B2B/DTC coexistence; ask how account pricing works in their approach
- !No plan for surviving Shopify platform updates; ask how they keep custom code stable
- !Quote without seeing your app stack; ask them to audit your current checkout conflicts
If shopify is on the roadmap, wordpress, pos, project management usually follow within the year. Budget them as one conversation.
Rohan advises mid-market and enterprise teams on ERP, CRM and custom software, and has led delivery on dozens of business-software builds.
Writes for Digital Heroes, shipping business software for 2,000+ brands across 55+ countries since 2017.
Frequently asked questions
When does a Shopify theme stop being enough?
When you're stacking apps for subscriptions, bundles, B2B, and tax and they start conflicting at checkout, or when post-Brexit EU VAT and customs logic isn't handled correctly. At that point custom development is usually cheaper than the app fees and firefighting combined.
How does custom Shopify handle EU VAT after Brexit?
It implements destination-aware logic: UK VAT for domestic orders, IOSS and the correct EU treatment for orders under the threshold, and proper customs handling above it. Template stores apply blunt rules that get this wrong, which creates compliance and customer-experience problems.
Should we go headless?
Only if performance, brand control, or a complex front end justify it. Headless gives speed and flexibility at higher build and maintenance cost. Many London brands get what they need from custom functionality on a standard Shopify storefront without going fully headless.
Will custom code break on Shopify updates?
Not if it's built properly. A good London partner builds against stable APIs and tests against Shopify's update cadence, which is exactly what a stack of third-party apps fails to do. That stability is a core reason to go custom.
Can B2B and DTC really share one store?
Yes. Custom development supports account-based catalogues and pricing so wholesale buyers see their terms and retail customers see theirs, in one storefront. Theme apps struggle to keep these clean, which is why mixed-model London brands often go custom.