March 5, 2026

If your small business spends money on developing new products, improving existing ones, or solving technical problems that do not have an obvious answer, you could be eligible for R&D Tax Credits. Many micro business owners in the UK are leaving thousands of pounds on the table simply because they do not realise they qualify. This guide breaks everything down in plain English so you can understand what R&D Tax Credits are, whether your business qualifies, and how to make a claim without getting lost in HMRC jargon. What are R&D Tax Credits? R&D Tax Credits are a UK government incentive designed to reward businesses that invest in research and development. They were introduced to encourage innovation and help businesses reduce their tax bills or, in some cases, receive a cash payment from HMRC even if the business made a loss. In simple terms, HMRC allows you to reclaim a portion of the money you spent on qualifying R&D activities. This can come back to you either as a reduction in your Corporation Tax bill or as a direct cash payment if your company is loss-making. Do R&D Tax Credits Apply to Micro Businesses? What Counts as a Micro Business in the UK? Under UK law, a micro business (also called a micro entity) is a company that meets at least two of the following three conditions: Annual turnover of no more than £1M Balance sheet total of no more than £500,000 No more than 10 employees If your business fits this description, you are classed as a micro entity. The good news is that R&D Tax Credits are not just for large corporations. Micro businesses can and do make successful claims every year. Can a One-Person Business Claim R&D Tax Credits? Yes. Even if you are a sole director running a limited company on your own, you can still claim R&D Tax Credits — as long as your work qualifies under HMRC’s definition of research and development. The size of your business does not disqualify you. How Do R&D Tax Credits Work for Small Companies? Micro businesses typically claim under the SME R&D Tax Credits scheme, which is available to companies with fewer than 500 employees and either an annual turnover of under €100 million or a balance sheet of under €86 million. As a micro entity, you will almost certainly fall within the SME scheme. Under this scheme, you can claim an additional deduction on top of your normal allowable expenses for R&D work. From April 2023, HMRC merged most claims into a single scheme called the R&D Expenditure Credit (RDEC), but SMEs that are either loss-making or heavily investing in R&D may still benefit from the SME Intensive Scheme. It is worth speaking to an accountant to confirm which route gives you the best outcome for your specific situation. What Kind of Work Qualifies as R&D? Does My Business Actually Do R&D? This is the question most micro business owners struggle with. Many assume R&D only applies to labs, scientists, or tech giants. That is not true at all. HMRC defines R&D very broadly. Your work qualifies if you are trying to achieve an advance in science or technology and the outcome was not certain when you started. In other words, if you were trying to solve a technical problem and you were not sure if you could do it, that is likely to qualify. What Are Some Examples of Qualifying R&D Activities? Here are some practical examples of what counts as R&D across different types of micro businesses: A software developer building a new platform feature that required solving a problem no existing tool could handle A food producer testing new recipes or production methods to extend shelf life without additives A construction firm trialling a new material or building technique that was not standard practice A manufacturer redesigning a product to work under conditions it previously could not handle A cleaning or hygiene company is developing a new formula to meet a specific client’s requirement The key question HMRC asks is: did a competent professional in your field already know the answer, or did you have to figure it out yourself? If you had to figure it out, it is likely to qualify. What Does Not Qualify as R&D? Not all business activity counts as R&D. The following are generally excluded: Routine testing or quality checks Cosmetic or aesthetic changes to a product Work that simply replicates what already exists in the market Arts, humanities, or social science projects (unless there is a scientific element involved) What Costs Can You Claim Under R&D Tax Credits? Which Expenses Are Eligible? You can claim a range of costs that are directly linked to your R&D activity. These include: Staff costs: wages, employer National Insurance contributions, and pension contributions for employees directly working on the R&D project. Subcontractors and freelancers: if you hired an external person or company to carry out part of the R&D work, a proportion of those costs may be claimable. The rules differ slightly depending on which scheme you are claiming under. Consumables: materials, water, fuel, or power used directly in the R&D process. Software: the cost of software licences used in the R&D activity. Prototypes: the cost of building a prototype that was used for R&D testing (not for sale). Clinical trials: if your business is in the health or pharmaceutical space, and you are paying volunteers for trials. What Costs Cannot Be Claimed? The following are not claimable under R&D Tax Credits: The cost of land Production or manufacturing costs once the product is complete Payments to directors that are not linked to R&D work Capital expenditure (though this may be claimable under other allowances) How Much Money Could You Get Back? What Is the R&D Tax Credit Rate for Micro Businesses? The amount you can reclaim depends on which scheme you fall under and whether your company is profit-making or loss-making. Under the merged RDEC scheme (which applies to most claims from April 2024 onwards),