Most UK tech startups bring in an accountant when the numbers get complicated. That is almost always too late.
The decisions that are hardest to unwind — company structure, share allocation, how R&D work is categorised, how a founder-director pays themselves — are made in the first six months. Getting them wrong does not just mean an awkward conversation later; it can mean lost tax relief, diluted equity, or a corporation tax bill that a better-structured company would not have faced.
AccTek works with UK tech startups across SaaS, AI, fintech, and deep tech — from pre-seed through to Series A. Our work is not reactive compliance. It is making sure that the financial and tax foundations are right before they are expensive to fix.
This guide covers the key areas: what a startup accountant actually does, R&D tax credits under the current merged scheme, first-year accounting obligations, SEIS and EIS, and software options.
A general accountant can file your annual accounts. A startup-specialist accountant structures the business so that those accounts reflect a company that has been built tax-efficiently and
investor-ready from the beginning.
In practice, the scope of work includes:
Ordinary shares, preference shares, and EMI option schemes for key employees all have different tax, voting, and liquidity implications. Getting the share structure right at
incorporation — rather than trying to restructure after a funding round — avoids unnecessary stamp duty, capital gains complexity, and investor friction. HMRC must approve EMI schemes before options are granted.
Monthly or quarterly management accounts give a founder visibility over burn rate, runway, and financial performance against forecast. Investors and lenders expect them as standard from Series A onwards; building the discipline earlier makes fundraising materially easier.
Identifying qualifying R&D activity, assembling the technical narrative, and preparing the claim for submission to HMRC. Under thecurrent merged scheme (effective 1 April 2024), most SMEs claim at the Research and Development Expenditure Credit (RDEC) equivalent rate. Claims must be submitted within two years of the end of the accounting period.
Applying to HMRC for advance assurance before approaching investors under the Seed
Enterprise Investment Scheme (SEIS) or Enterprise Investment Scheme (EIS). Advance assurance is not mandatory, but most sophisticated investors require it before committing capital.
Innovate UK and UKRI grants carry specific accounting and reporting requirements. Income recognition, matched-funding schedules, and claim preparation need to be handled correctly to avoid clawback.
For founder-directors taking income from the business, the split between PAYE salary and dividends has significant National Insurance and income tax implications. See our guide to director salary vs dividends 2026/27 for the current-year figures and worked examples.
Companies House requires filed accounts annually. The deadline is nine months and one day after your accounting year end for private limited companies (first accounts may cover up to 18 months).
R&D tax credits are the most significant tax benefit available to early-stage UK tech companies — and the one most often claimed incorrectly, or not claimed at all.
From 1 April 2024, HMRC merged the previous SME R&D Relief and RDEC schemes into a single merged scheme for most companies. Under the merged scheme, qualifying expenditure generates an above-the-line credit at a rate equivalent to approximately 20% of eligible costs (the net benefit after corporation tax). R&D-intensive loss-making SMEs —
broadly those where qualifying R&D expenditure represents at least 30% of total expenditure — retain access to a higher payable credit rate of up to 14.5%.
These rates are current for the 2026/27 tax year. Always confirm the latest rates at HMRC’s R&D tax relief guidance before submitting a claim.
HMRC applies a technological uncertainty test: the work must seek to resolve a scientific or technological uncertainty that a competent professional in the field could not readily resolve. This is
a higher bar than “novel to the business” — the outcome must be genuinely uncertain even to an expert.
In the tech sector, the following can qualify:
The following do not qualify:
The most common reason for an R&D claim to be challenged or reduced is insufficient contemporaneous documentation. Records to maintain from the start of any qualifying project:
Claims must be submitted within two years of the end of the relevant accounting period.
Compliance note: R&D tax credit claims require professional preparation and technical and financial sign-off. The information in this section is a general overview only — it does not
constitute tax advice. Contact a qualified accountant before preparing or submitting an R&D claim.
You must register with HMRC for corporation tax within three months of starting to trade. “Starting to trade” includes receiving your first payment, signing your first contract, or incurring costs in preparation for trading. Register at GOV.UK.
Your first set of statutory accounts can cover up to 18 months (for companies whose initial accounting period runs longer than 12 months). From year two onwards, accounts must be filed at Companies House within nine months of your accounting year end. A confirmation statement is also required every 12 months — this is separate from the accounts
filing.
Most founder-directors take a low salary — at or above the National Insurance secondary threshold, currently £5,000 per year for 2026/27 — and supplement this with dividends to minimise
employer and employee NI while extracting profits tax-efficiently. The optimal split depends on individual tax position and other income sources. See our director
salary vs dividends 2026/27 guide for current thresholds and a full breakdown.
Founder-directors with self-assessment obligations — including those receiving dividend income, rental income, or other sources outside PAYE — should note that Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is live for those above the applicable income threshold. The Q2 quarterly update, covering 6 July–5 October 2026, is due by 7 November 2026.
The VAT registration threshold is currently £90,000 rolling 12-month taxable turnover — confirm the current threshold at GOV.UK before acting, as this figure is subject to change at each Budget. Many tech startups voluntarily register for VAT before reaching the threshold, particularly if their customers are themselves VAT-registered businesses, as this enables input VAT recovery from the outset.
If you take a salary through the company payroll — including a director’s salary — you must register as an employer with HMRC before making the first payment. PAYE registration is separate from corporation tax registration and is completed via GOV.UK.
If you are raising equity investment from individual investors, the Seed Enterprise Investment Scheme (SEIS) and Enterprise Investment Scheme (EIS) are the primary frameworks through which UK investors receive income tax relief on their capital — and the main reason sophisticated investors often require advance assurance before writing a cheque.
Under SEIS, a qualifying company can raise up to £250,000 from eligible investors. Each investor receives 50% income tax relief on the amount invested, along with capital gains reinvestment relief and a CGT exemption on disposal if shares are held for at least three years. SEIS qualifying conditions include limits on company age, headcount, and gross assets at
the time of the share issue. Apply for SEIS advance assurance from HMRC before approaching investors.
Under EIS, a qualifying company can raise up to £5 million per year from eligible investors (with a lifetime limit of £12 million for most companies). Investors receive 30% income tax
relief on their investment, plus loss relief and CGT deferral. EIS qualifying conditions are more complex than SEIS, and companies that have previously issued SEIS shares face additional constraints on timing.
Compliance note: SEIS and EIS involve complex qualifying conditions, investor reporting obligations, and ongoing compliance requirements. The above is a general information overview — it does not constitute investment or tax advice. Obtain professional advice before applying for advance assurance or issuing shares under either scheme.
Choosing the right software in year one avoids a disruptive migration later. All three products below are MTD-compatible and suitable for UK private limited companies.
| Software | Price tier | MTD-compatible | R&D cost tracking | Best for |
|---|---|---|---|---|
| Xero | Mid | Yes | Via tracking categories | SaaS and funded startups |
| FreeAgent | Low–mid | Yes | Limited | Pre-seed and solo founders |
| QuickBooks | Mid | Yes | Via custom reports | US-founded UK entities |
All products listed are independently reviewed. This is information only — not a referral or endorsement.
AccTek works with all three. For most UK-incorporated tech startups, Xero’s tracking category functionality makes R&D cost allocation and management reporting to investors considerably more straightforward.
AccTek provides specialist accounting services for UK tech startups — from incorporation through to Series A and beyond. Our startup accounting service includes:
We are a qualified chartered accountancy practice, ICPA member, and AML-supervised by HMRC.
View our startup accounting service →
Use our startup runway calculator to model your current burn rate and runway across different growth and spend scenarios — useful for board packs and investor conversations.
If you operate as a contractor rather than through a company with employees, see our guide to accounting for IT contractors in the UK. For companies approaching the end of
their life or a wind-down, see our guide to closing a limited company.
How much does a startup accountant cost in the UK?
Fees vary by practice, service scope, and company complexity. A basic
compliance-only package — annual accounts and corporation tax return —
for a pre-revenue startup typically starts from a few hundred pounds per
year. A full-service package covering management accounts, R&D claim
preparation, SEIS/EIS support, and payroll is usually priced on a fixed
monthly retainer and will cost more. AccTek’s startup service pricing is
available at acctek.co.uk/who-we-help/startup-accountant-uk/.
When does a UK tech startup need an accountant?
At or before incorporation if the company will involve equity
investors, an EMI option scheme, or R&D activity. The share
structure, R&D documentation habits, and director pay setup are all
significantly harder — and more expensive — to correct retrospectively.
If you are a sole founder with no equity complexity, you may manage
early compliance yourself; but most tech startups benefit from
specialist input from day one.
What counts as R&D for tax credit purposes?
HMRC applies a technological uncertainty test: the work must seek to
resolve a scientific or technological uncertainty that a competent
professional in the relevant field could not readily resolve. Software
development, AI and ML model training, and novel product R&D can
qualify — routine development, configuration, and maintenance do not.
The full qualifying criteria are set out in HMRC’s
R&D guidance.
Can a pre-revenue startup claim R&D tax
credits?
Yes, provided the company has incurred qualifying R&D expenditure
and meets the other eligibility conditions. Under the merged scheme,
loss-making R&D-intensive SMEs may be entitled to a payable (cash)
credit rather than simply a reduction in future tax — meaning a
pre-revenue startup can receive a payment from HMRC before it is
profitable. This is information only; professional advice is required
before preparing or submitting a claim.
What records does a UK company need to keep?
Under the Companies Act 2006, companies must retain accounting
records for at least six years from the end of the financial year they
relate to. For R&D claims specifically, contemporaneous
documentation — version control logs, time records, technical decision
logs, and cost allocations — is essential and should be maintained from
the start of any qualifying project. HMRC can and does open enquiries
into R&D claims; adequate records are the primary line of
defence.
AccTek Ltd — qualified chartered accountancy practice · ICPA
member · AML-supervised by HMRC. The content on this page is for general
information purposes only. It does not constitute tax, legal, or
financial advice. Figures and rates are correct for the 2026/27 tax
year; confirm current thresholds and rates at GOV.UK before acting.
Godwin Pinto ACA (ICAI) is the founder of AccTek and a member of ICPA, with 20+ years of experience in accounting and tax for contractors, startups and SMEs. Previously at PwC.
AccTek is a member firm of the Institute of Certified Practising Accountants (ICPA), and our founder is a member of the Association of International Accountants (AIA) holding an AIA Practising Certificate. Our accountants hold qualifications and accreditations from trusted professional bodies including the AIA, ICPA, AAT and ACCA.
