英国企业研发税收抵免申请指南

Introduction

HMRC recorded 46,950 R&D tax credit claims for the 2023 to 2024 tax year — a figure that dropped 26% year-on-year, according to HMRC's September 2025 R&D statistics. That decline reflects tighter eligibility rules and increased compliance scrutiny, but it also signals that many businesses are stepping back from claims they are likely entitled to.

This guide is for UK limited companies across any industry — manufacturing, construction, food production, software, professional services — that are spending money to develop or improve products, processes, or services. You do not need to be running a laboratory or a pharma business to qualify.

Here is what this guide covers:

• How R&D tax credits work under the current rules
• Whether your business is likely to qualify
• Which costs you can include in a claim
• Steps to make a valid, compliant submission to HMRC

TL;DR

• R&D tax credits reduce a company's Corporation Tax bill or generate a cash repayment for qualifying innovation expenditure.
• Any UK limited company subject to Corporation Tax that resolves genuine scientific or technological uncertainty may be eligible — no sector restriction applies.
• Qualifying costs include staff wages, employer NICs, pension contributions, subcontractor fees, consumables, software licences, and cloud computing costs.
• For accounting periods beginning on or after 1 April 2024, most companies claim under the Merged Scheme; loss-making R&D-intensive SMEs may use the higher ERIS rate instead.
• First-time claimants (or those who haven't claimed in over three years) must file a Claim Notification Form within six months of the accounting period end — missing this deadline voids the claim.

What Are R&D Tax Credits?

R&D tax credits are a Corporation Tax relief that lets UK companies either reduce their tax bill or, if loss-making, receive a cash payment directly from HMRC. The scheme exists to reward genuine investment in innovation — not just new products, but any project that pushes the boundaries of scientific or technical knowledge.

The Core HMRC Test

HMRC's definition of qualifying R&D is specific. Under HMRC's guidelines on the meaning of R&D for tax purposes, a project must:

1. Seek an advance in overall knowledge or capability in a field of science or technology — not just an advance in your own company's knowledge
2. Attempt to resolve a scientific or technological uncertainty that a competent professional in that field could not readily resolve

If the answer is already known, or could be found by a skilled practitioner applying standard techniques, it does not qualify. The test is about genuine technical uncertainty — not commercial novelty or internal learning.

Current Schemes

Two schemes apply for accounting periods beginning on or after 1 April 2024:

‍

‍

Accounting periods that started before 1 April 2024 are subject to the legacy SME and RDEC rules. If you are filing for an earlier period, confirm which framework applies before proceeding.

Who Qualifies for R&D Tax Credits in the UK?

The Three Core Conditions

Every claimant must satisfy all three:

1. Be a UK limited company subject to Corporation Tax
2. Have carried out qualifying R&D activities — meaning work that sought to resolve scientific or technological uncertainty
3. Have incurred expenditure on those activities

What "Scientific or Technological Uncertainty" Means in Practice

This is HMRC's primary test. Uncertainty exists when a competent professional in the relevant field cannot determine whether something is technically possible — or how to achieve it — based on currently available knowledge. Commercial risk, financial uncertainty, or market unknowns do not count.

A construction firm developing a new structural technique where established methods cannot confirm feasibility faces genuine technical uncertainty. A software company adapting a known algorithm for a new client does not.

Which Industries Can Claim?

R&D tax credits are not restricted to technology or pharmaceutical companies. HMRC's 2023 to 2024 R&D statistics show that while Information and Communication (26% of claims), Manufacturing (26%), and Professional, Scientific and Technical (19%) account for the bulk of claims, companies in food production, agriculture, financial services, and construction can all include qualifying activity.

What matters is the nature of the work — not the sector your business operates in.

ERIS Eligibility Thresholds

ERIS (the Enhanced R&D Intensive Support scheme) is designed for smaller, R&D-heavy companies. To qualify, a company must:

• Have fewer than 500 employees
• Meet either the turnover cap (under €100m) or balance sheet cap (under €86m) — including linked or partner enterprises. These are HMRC's retained euro-denominated thresholds, carried over from EU-derived legislation
• Have qualifying R&D expenditure of at least 30% of total expenditure for periods starting on or after 1 April 2024

What Does NOT Qualify

• Activities in arts, humanities, or social sciences (including economics)
• Routine analysis, minor optimisation, or copying of existing products without genuine uncertainty
• Commercial steps involved in marketing or distributing an innovation
• General support services such as security, maintenance, or administration

What Costs Qualify for R&D Tax Credits?

Staff Costs

Directly employed staff costs attributable to qualifying R&D are claimable, including:

• Salaries and wages
• Employer's Class 1 National Insurance contributions
• Employer pension contributions

A proportion of management or support staff time spent directly supporting R&D activity can also be included, provided it is reasonably apportioned.

Subcontractors and Externally Provided Workers

Under the Merged Scheme, where R&D is subcontracted to an unconnected party, the claim is generally restricted to 65% of the relevant subcontractor expenditure. The rules on who can claim have also shifted: if your business both commissions and performs R&D, establish clearly which entity bears the qualifying costs before filing.

Consumables and Materials

Materials, consumables, and utilities (heat, light, power) consumed or transformed directly during the R&D process qualify. Where items are subsequently incorporated into commercially sold products, careful apportionment is required to isolate the R&D-related portion.

Software, Data, and Cloud Computing

This category became explicitly qualifying for accounting periods starting on or after 1 April 2023:

• Software licences directly used in qualifying R&D
• Purchased datasets employed in resolving technical uncertainty
• Cloud computing costs — including processing and storage — directly tied to R&D activity

This matters most for software and SaaS businesses that previously had no route to claim cloud infrastructure costs. If only part of a software licence or cloud service is used for R&D, an appropriate apportionment is required.

Capital Expenditure

R&D tax credits cover revenue expenditure only. Capital assets fall outside the R&D costs claim entirely — but they are not without relief:

• Excluded from R&D credits: equipment, machinery, and property
• Separately qualifying: capital items used in R&D may qualify for 100% R&D Capital Allowances under HMRC's Capital Allowances Manual (CA60000)

These are two distinct mechanisms. Treating capital assets as revenue expenditure — or missing the Capital Allowances route entirely — is one of the most frequent errors in self-prepared claims.

How to Claim R&D Tax Credits: Step-by-Step

The end-to-end process covers six stages:

1. Identify qualifying projects and document your R&D
2. Submit a Claim Notification Form (if required)
3. Complete and submit the Additional Information Form
4. File your Corporation Tax Return
5. Apply eligible expenditure to your tax computation
6. Receive your tax reduction or cash credit repayment

Step 1: Identify Qualifying Projects and Document Your R&D

Map each candidate project against HMRC's definition. For each qualifying project, document:

• The specific scientific or technological uncertainty you attempted to resolve
• The work undertaken — including approaches tried and abandoned
• The outcome — whether successful or not (failed projects still qualify)

Good contemporaneous records — meeting notes, technical specs, test logs, time records — are what HMRC will want to see if they open a compliance check. Assembling this retrospectively is possible but harder and riskier.

Step 2: Submit a Claim Notification Form (If Required)

For accounting periods beginning on or after 1 April 2023, you must submit a Claim Notification Form via HMRC's online portal if:

• This is your first R&D tax credit claim, or
• Your last claim was more than three years ago

The deadline is six months after the end of the accounting period. This is an absolute cut-off — it cannot be extended.

Required information includes:

• Company UTR
• Senior R&D contact details
• Agent contact details (if applicable)
• Accounting period start and end dates
• High-level summary of planned activities showing how the work meets HMRC's R&D definition

Step 3: Complete and Submit the Additional Information Form

From 8 August 2023, all claimants must submit an Additional Information Form to HMRC before filing the Corporation Tax Return. The form requires:

• Project descriptions: field of science or technology, baseline level, advance sought, uncertainties encountered, how the project addressed them
• Cost breakdown: qualifying expenditure by category, PAYE cap information where relevant
• Agent details: all advisers involved in preparing, costing, or providing technical assessment for the claim

If the Corporation Tax Return is filed before the Additional Information Form is submitted, the R&D claim will be rejected.

Step 4: File Your Corporation Tax Return

Once the Additional Information Form is submitted, include the R&D claim in your Corporation Tax Return (CT600). The eligible expenditure is applied to your Corporation Tax computation — either reducing taxable profits through enhanced deductions or generating a surrenderable loss for a cash repayment under ERIS.

Claims can be made up to two years after the end of the relevant accounting period. Note that CT600 boxes 656 and 657 require confirmation that the Claim Notification and Additional Information Form steps have been completed.

Getting these steps right matters — errors in sequencing or documentation are among the most common reasons HMRC opens a compliance check. VJM Global has supported 250+ UK businesses through R&D tax credit claims, helping ensure submissions are correctly structured and properly evidenced from the outset.

Common Misconceptions and Mistakes to Avoid

"R&D Tax Credits Are Only for Tech Companies"

This is the most persistent and costly misconception. HMRC's test is about the nature of the activity, not the industry. A food manufacturer reformulating a product to resolve a genuine technical challenge may qualify just as much as a software firm. The question is always: was there a scientific or technological uncertainty that a competent professional could not readily resolve?

Over-Claiming Without Adequate Documentation

英国税务海关总署 (HMRC) 大幅扩充了其研发合规团队。根据 英国税务海关总署的2024-2025年度报告，该部门目前拥有超过 500名员工 专门负责研发合规工作（高于2020-2021年的约100名）。在2023年至2024年期间，英国税务海关总署审查了 9,700份申报 — 其中 77%被调整，其中 4.41亿英镑 被认定为不当申报。研发申报的估计错误和欺诈金额目前为 4.81亿英镑（占5.9%） 占2024-2025年总减免额的。

涉及常规活动、缺乏支持文件或支出分类错误的申报将不再蒙混过关。审查已达到前所未有的严格程度。

错过申报通知截止日期

自2023年4月起，新申报者以及中断后再次申报者必须在相关会计期结束后的六个月内提交申报通知表 — 在提交主要申报之前。许多中断后再次申报或首次申报的企业完全错过了这一步骤。一旦截止日期过去，该期间的申报将无法补救，无一例外。

如果您认为自己可能符合资格，请尽快采取以下步骤：

• 确认您的公司是否符合通知要求（适用于首次申报者和中断后再次申报者）
• 确定您的会计期结束日期
• 在准备完整的研发申报之前提交通知表

常见问题

英国研发税收抵免如何申请？

英国有限公司必须识别符合条件的研发活动，如需要，提交索赔通知表，在申报前完成附加信息表，然后将研发索赔纳入公司税申报表。合格的税务顾问可协助确保每个步骤按正确顺序完成。

谁有资格获得研发税收抵免？

任何受公司税约束、开展了符合条件的科学或技术研发并产生了相关支出的英国有限公司均可获得资格。资格并非行业特定：制造业、建筑业、食品生产和专业服务业都可能包含符合条件的活动。

英国的研发税收抵免如何运作？

符合条件的研发支出可用于抵扣或冲减公司的企业所得税负债，从而减少应缴税款或产生现金退税。具体税率和机制取决于公司是否属于 合并计划 或相关会计期间的ERIS。

获得研发税收抵免需要多长时间？

英国税务海关总署（HMRC）目前的服务标准是处理 85%的研发索赔在40天内 收到，HMRC报告称在 该期限内达到90% 在2024年至2025年。如果HMRC对索赔进行合规性检查，处理时间可能会更长。

亏损公司可以申请研发税收抵免吗？

是的。亏损公司可以放弃符合条件的亏损，以获得HMRC的现金退税。研发支出占总支出至少30%的亏损中小企业，也可以享受更高的ERIS税率，从而获得更高的减免。

英国研发税收抵免的申请截止日期是什么时候？

研发减免索赔通常必须在 两年内 相关会计期结束之日起。首次申请者以及中断三年以上后再次申请者，还必须在 六个月 期限结束之日起提交，该较短的截止日期优先。

‍