R&D Tax Relief for Shopify App Development and Ecommerce Software

Custom Shopify app development can qualify for R&D tax relief, but only when the project tries to resolve a technical uncertainty that a competent developer could not readily work out. Most ecommerce build work does not meet that test, including theme changes, installing or configuring apps, connecting services through documented APIs and moving to a headless storefront with a standard framework. Where a project does qualify, the merged scheme gives a 20% expenditure credit on qualifying costs, worth roughly 15% to 16% after tax. Where it does not, the cost still gets tax relief through the normal rules.

This article is part of our capital allowances, R&D and tech tax reliefs guide. It applies to limited companies with accounting periods beginning on or after 1 April 2024.

Why HMRC Is Watching Ecommerce Claims

In May 2025 HMRC wrote to companies selling goods online or by mail order, saying R&D claims from the sector were unlikely to qualify and listing activities it often sees claimed that do not meet the rules. The letter also warned about advisers cold-calling businesses to say that ordinary commercial work counts as R&D. HMRC has since sent similar letters to other sectors.

The reason is a long run of claims that did not meet the rules. Every new claim must now be backed by an additional information form, and a claim prepared by an agent remains the company's own responsibility if it turns out to be wrong.

What Counts as R&D for Software

The test comes from the government guidelines on the meaning of R&D for tax purposes. A project must seek an advance in overall knowledge or capability in a field of science or technology, by resolving scientific or technological uncertainty. Software is judged on the same basis as any other field.

The guidelines also set out what does not count:

• Work a competent professional in the field could readily resolve, even if it was difficult or slow for your team.
• Routine copying or adaptation of an existing product or process, even when it is new to your company.
• Catching up with what is already known in the industry. Building something competitors already have is not an advance.
• The commercial side of the project, such as design choices, content and marketing analysis.

For a typical Shopify store, that rules out most of the work. Editing a theme, writing Liquid templates, building a private app that calls documented Shopify and third-party APIs, and launching a headless storefront on an established framework are all routine development for an experienced team. The fact that the work cost a lot, took months or used new technology does not change that.

Ecommerce Projects That Can Qualify

A claim is stronger where your developers hit a technical problem with no known solution and had to work through it by testing approaches that might fail. Examples might include:

• A system for allocating stock across warehouses and marketplaces in real time at a volume where existing tools fail, where the method for keeping records consistent was genuinely unknown.
• Product recommendation or search methods that needed new technical approaches, not just configuring an existing service.
• Integration with systems that have no usable interface, where the way to read or synchronise data reliably had to be invented and proven.

Even then, only the parts of the project that address the uncertainty qualify. Front-end work, content and routine connections around the core problem are usually outside the claim. Keep notes during the project of what was uncertain, what was tried and what failed. Tribunal cases are regularly lost because the company could not show this evidence afterwards.

Which Costs Count and What the Relief Is Worth

Qualifying costs include staff working directly on the R&D (salaries, employer National Insurance and pension contributions), externally provided workers, software and data licences, cloud computing used for the R&D and consumables. Under the merged scheme, only the company that decides the R&D should be done can claim for work it pays a contractor to do. Payments to an unconnected agency count at 65% of the amount paid.

Work done outside the UK is generally excluded. For accounting periods beginning on or after 1 April 2024, contractor and externally provided worker costs for R&D carried out overseas cannot be claimed, with limited exceptions. An offshore development agency or freelancers working abroad usually fall outside the claim.

The credit is taxable, so its value depends on your corporation tax rate. At the 25% main rate the same claim is worth about £7,950. Loss-making companies that spend at least 30% of their total costs on R&D can use the enhanced support for R&D-intensive companies instead. Few retailers meet that test, because stock and advertising make up most of their spending.

Deadlines and Paperwork

• If this is your first claim, or your last claim was more than three years ago, you must tell HMRC you plan to claim within six months of the end of the period. GOV.UK's claim notification guidance says a claim made without it is invalid.
• Every claim needs an additional information form, submitted before or on the same day as the company tax return. If the return goes first, HMRC rejects the claim.
• HMRC is running a targeted advance assurance pilot, announced at the Autumn Budget 2025, under which a smaller company can ask HMRC to confirm up to two areas of a planned claim before filing. It suits borderline software projects.

When the Work Is Not R&D

Development that does not qualify still gets tax relief. If the build is treated as an intangible asset in your accounts, the company normally gets a deduction as it is amortised. Smaller improvements that keep the site running are usually ordinary business expenses. New computers and servers can qualify for full expensing, which is now a permanent relief for companies. Agree the treatment with your accountant before the year end so the accounts and the tax return match.

If you want a second opinion on a proposed claim or on how to treat a site rebuild, see our Shopify accountants service.

Questions Owners Ask About R&D and Ecommerce Software

Does website development qualify for R&D tax relief?

Rarely. Building or improving a website with established tools is routine work for a competent developer. It can qualify only where the project tries to resolve a genuine technological uncertainty.

What is the R&D rate under the merged scheme?

20% of qualifying costs as an expenditure credit, which is taxable. After tax it is worth about 16.2% at a 19% corporation tax rate or 15% at 25%.

Can I claim for developers based outside the UK?

Generally not, for accounting periods beginning on or after 1 April 2024. Contractor and externally provided worker costs for R&D done overseas are excluded except in limited cases.

Do I need to tell HMRC before I claim?

Yes, if it is your first claim or you have not claimed in the last three years. The notification is due within six months of the end of the accounting period.