Who we helpIndustry guide

Accounting for startups, built around your raise and your runway.

Company formation, SEIS/EIS advance assurance, R&D claims and investor-ready numbers, handled by a startup accountant before the term sheet arrives.

You are building a company, not deciphering HMRC. Most founders only think about accounting when an investor’s due-diligence list lands, and by then the easy wins are often gone: the share structure that would have qualified for relief, the advance assurance that makes a raise simple, the R&D (research and development) records nobody kept. A good accountant for startups works the other way round. We get your [limited company](/for/limited-companies) set up correctly from day one, line up the reliefs that bring investors to the table, and turn your bookkeeping into numbers a board will actually read. Book a call with a startup accountant who has done this from pre-seed through to a priced round, on one fixed monthly fee.

  • 4.9 Google · 63 reviews
  • CIMA-regulated
  • 30-day money-back
qualified accountant reviewing financials
The problem

Why Do Generic Accountant Services for Startups Fall Short?

Generic accountant services for startups treat you like any other small company, and it shows. Most accountants are built to file last year’s accounts for an established business. They are excellent at looking backwards and almost useless at the questions a founder actually has.

Can my company qualify for SEIS (the Seed Enterprise Investment Scheme) before I raise? Is this work an R&D claim? Should my early hires get options or shares? Will my numbers survive an investor’s due diligence? A backward-looking accountant has no answer, so founders make these calls alone, and the expensive mistakes only surface later.

A specialist accountant for startups works in the present and the near future. We know which decisions at incorporation decide what you can claim in two years, because we have walked founders through it from first share to first term sheet before.

Tailored services

What Does an Accounting Firm for Startups Handle?

  • 01

    Company formation done right

    Incorporation, founder shares issued at the start, a clean cap table and the registrations a startup needs, set up so reliefs stay open rather than closed off later.

  • 02

    SEIS and EIS advance assurance

    We confirm your company and trade qualify, secure advance assurance from HMRC before you raise, then file the compliance paperwork so investors get their certificates without drama.

  • 03

    R&D tax relief claims

    We separate genuine technical advances from routine development, document the project narrative, and submit a claim built to survive the closer scrutiny HMRC now applies.

  • 04

    EMI and employee share options

    Share options are how startups reward a team they cannot yet pay in cash. We set the scheme up, arrange the valuation and handle the filing so the tax advantages actually stick.

  • 05

    Investor-ready management accounts

    Monthly numbers built around the metrics a seed or Series A investor asks for: cash, runway, burn, recurring revenue and margin, in a board-pack format from day one.

  • 06

    VAT, Corporation Tax and software

    We watch your VAT position, file your Corporation Tax, and get your accounting software set up clean so the numbers behind every claim and every board pack hold up. It is the day-to-day work an accounting firm for startups should just get right.

Before you incorporate

Sole Trader or Limited Company? Get the Structure Right First

Before the SEIS certificates and the R&D claims, there is one decision that shapes everything after it: sole trader or limited company. Most founders reach for sole trader because it looks simpler, and for a freelancer testing an idea it often is.

But if you plan to raise, reward early hires with share options, or claim R&D tax relief, you almost certainly need a limited company. SEIS and EIS relief, EMI options and the cleanest R&D claims are only open to companies. Start as a sole trader and you can move later, but the switch means transferring contracts, re-registering, and a possible tax charge on any value you have already built.

The honest answer is that it depends on where you are heading, not just where you are today. A side project earning a few thousand pounds is a different question from a product you intend to raise against within the year. Accounting for tech startups is a different job from accounting for a corner shop, and the structure you pick now sets the ceiling on both.

We look at your plans, tell you which structure actually fits, and if a limited company is right, we handle the company formation with a clean share structure from day one. That is the part a cheap set-up service skips, and the part that decides what you can claim later.

Getting set up

Why Set Your Company Up Right, Not Just Fast?

You can incorporate a company online in an afternoon, and plenty of founders do. The problem is not forming the company. It is forming it in a way that quietly closes doors you will want open later.

The share structure you choose, how and when founder shares are issued, and the trade you register all feed into whether you can later claim investor reliefs or grant tax-advantaged options. Get them wrong early and the fix can be costly, or impossible.

We set your limited company up around where you are heading, not just where you are today: a clean cap table, founder shares in place from the start, and the registrations and records an investor will eventually want to see.

It is the least glamorous part of working with a startup accountant, and the part that saves founders the most money down the line.

Raising investment

How Do SEIS and EIS Make Your Raise an Easier Yes?

The Seed Enterprise Investment Scheme and the Enterprise Investment Scheme give your investors generous tax relief for backing an early-stage company. For an angel weighing up your round against ten others, that relief is often what tips the decision.

But the relief is the investor’s, not yours, and it only exists if your company qualifies and the paperwork is right. The trade has to be eligible, the company has to be within the scheme’s limits, and the money has to be used the way the rules require.

The limits recently grew. From 6 April 2026 an eligible company can raise up to £10 million a year and £24 million over its lifetime through EIS, and the gross-asset tests rose to £30 million before the share issue and £35 million after. SEIS sits earlier in the journey, with up to £250,000 of investment for a young company that qualifies. Whether either scheme fits depends on your trade, age and size, so we check that first rather than assume it.

The single most useful thing here is advance assurance: a letter from HMRC, secured before you pitch, indicating your company should qualify. It turns a nervous conversation into a confident one, because your investors can see the relief is real.

We confirm you qualify, secure the advance assurance, then handle the compliance statements after the round so your investors actually receive the certificates they need to claim. Get the share class, the timing or the trade wrong, and the relief can be lost entirely, which is exactly why a startup accountant earns their fee here.

R&D tax relief

Can Your Startup Claim R&D Tax Relief?

If your startup is wrestling with a genuine technical problem, where the answer was not obvious to a competent professional in the field, the work behind it may qualify for R&D tax relief. For a young company, that can mean real money back to extend your runway.

It does not have to be people in lab coats. Building something that does not exist yet, solving performance or scaling problems with no off-the-shelf answer, integrating systems in ways nobody has documented; these are the everyday realities of a startup, and they are often where qualifying R&D lives.

The catch is that the relief has tightened, and HMRC now scrutinises claims far harder than it used to. A vague claim, or one that dresses up routine development as innovation, invites questions you do not want during a raise.

We scope the genuinely qualifying activity, separate it cleanly from the routine build, and write the technical narrative HMRC now expects under the current merged R&D scheme, or Enhanced R&D Intensive Support (ERIS) if you are a loss-making, R&D-intensive company, so your claim holds up rather than triggering an enquiry. We describe how the scheme works for your specific situation in plain English, without you needing to learn the rulebook. It is specialist work, and a good startups accountant does it every week, not once a year.

Paying yourself

How Should You Pay the Founders and First Hires?

Once you have a limited company, how you take money out of it matters. You pay Corporation Tax on profit, then most founders take a modest salary topped up with dividends, which is usually more efficient than salary alone, though the right mix depends entirely on your numbers and what the company can afford while it is still burning cash.

We run your payroll so your salary and any early employees are paid properly through PAYE (Pay As You Earn), and we plan the salary-and-dividend balance around your runway rather than a textbook.

For the team you cannot yet pay full market salaries, equity is the answer, and share options are usually the smart way to grant it. A well-run EMI (Enterprise Management Incentives) option scheme lets you reward key hires tax-efficiently and tie them to the upside they are helping to build. From 6 April 2026 the scheme reaches further, with an eligible company able to grant up to £6 million of options, employ up to 500 people and let options run for up to 15 years, so teams that once outgrew it may qualify again. We set the scheme up, arrange the valuation and handle the filings so the tax advantages actually hold.

Payroll services for startups

From your first hire, we run PAYE, pensions and the salary split, so nobody is paid late and nothing slips.

Investor-ready numbers

Will Your Numbers Survive Investor Due Diligence?

When you raise, an investor will ask for your numbers, and the gap between a clean board pack and a shoebox of receipts can be the gap between a yes and a polite no. This is where good accounting for startups earns its keep.

We set up your bookkeeping properly from the start, so every month closes on time and the figures are accurate rather than approximate. That is the foundation everything else sits on.

On top of it we produce management accounts built around the metrics investors care about: how much cash you have, how fast you are spending it, how many months of runway that leaves, and how your recurring revenue and margins are moving, which for a tech startup or a SaaS startup usually means MRR, churn and gross margin. You should know your burn and runway to the month, not guess at them.

We also keep you fluent in your own cap table, so when a round comes you understand exactly how new money and option pools dilute the founders, before you sign anything.

Bookkeeping services for startups

Clean monthly books are the base every board pack and every claim sits on, so we close them on time, every month.

Compliance and tooling

When Should Your Startup Register for VAT, and What Software Fits?

Growth brings deadlines. As your sales climb you have to register for VAT (Value Added Tax) once your taxable turnover passes £90,000 in any rolling 12 months, no earlier and no later, and we handle your VAT registration and returns so it is one less thing on your plate.

Your company also owes Corporation Tax on its profits and has accounts to file at Companies House each year. As your tax accountant for startups, we keep every statutory deadline tracked and filed, so a missed return never turns into a penalty during a fundraise.

Underneath all of it is your accounting software. We help you choose a tool that fits a startup, whether that is Xero, QuickBooks, FreeAgent or Sage, connect it to your bank, and set it up so your bookkeeping, claims and board reporting all draw from one clean source of truth, rather than three spreadsheets that disagree.

How we work

What Do the Best Accounting Firms for Startups Do Differently?

Not all accounting firms for startups work the same way. When you call us, you are not routed to whoever picks up. You get one qualified accountant who knows your company, your cap table and where your last raise got to, so you are not re-explaining your business every time a deadline or an investor question lands.

That matters most when the timing is tight: an advance assurance letter needed before a pitch, a board pack due on Friday, an R&D deadline you did not realise was close. An accountant who already understands your numbers can act on it that day, not next week.

Zmartly is a CIMA-regulated practice founded and led by Harvey Dhillon (ACMA, CGMA), and startups here are handled by qualified accountants who have taken founders from pre-seed through to a priced round. We are London-based in Hammersmith and work with founders across the UK, so whether you want a local accountant for startups in London or the same service online wherever you are, nothing about it changes. You get that experience directly, on a fixed monthly fee, not a rotating cast of junior staff, which is what founders really mean when they look for the best accountant for startups.

Accountant for startups UK

Wherever you are in the country, you work with the same named person, the same fixed fee and the same quick replies.

Simple, fixed fees

How Much Do Accounting Services for Startups Cost?

Most early-stage startups pay between £129 and £250 a month, with project work like an SEIS/EIS application or an R&D claim scoped and priced up front so it never appears as a surprise on your statement.

No hourly rates and no January shocks. One fixed fee covers your accounting services for startups, with a named, qualified accountant who understands raising and runway, and a 30-day money-back guarantee.

  • Essentials

    Startups and small companies that need essential compliance and year-end support without VAT or payroll.

    £129/month
    • Preparation of Company Year-End Financial Statements
    • Year End Corporation Tax Computation
    • Submission of CT600 to HMRC
    • Statement of Account submissions to Companies House
  • Premium Plus

    Growing businesses that need complete accounting services, VAT return management, and payroll handling.

    £250/month
    • Everything in Essentials
    • Quarterly VAT return calculation and submission
    • Payroll and benefits management
  • Enterprise

    Established businesses that want strategic mentoring, business planning, and a part-time finance director driving growth.

    £499/month
    • Everything in Premium Plus
    • Business mentoring
    • Part-time finance director
    • Business plan
Making the move

Is Switching Your Startups Accounting Services a Hassle?

If you already have an accountant, you do not need to wait for year-end to move, and you do not need an awkward conversation with your current one. We handle the handover for you.

We write to your existing accountant for professional clearance, move your startups accounting services across, and get you set up, usually within a couple of weeks. You can switch mid-year, mid-raise or mid-claim without anything falling through the gap.

Founders usually move for one reason: their current accountant files last year’s accounts well but cannot answer the questions that decide this year’s raise. If that sounds familiar, changing is easier than staying put.

Best accounting services for startups

Founders move to us for the service, not just the price: proactive advice, quick answers, and someone who already knows the raise you are planning.

Trusted by founders

What Our Clients Say.

  1. I’ve had an excellent experience working with Zmartly. Harvey and the team are professional, responsive, and genuinely supportive. They explain things clearly, stay on top of deadlines, and always look for practical ways to save tax and improve…
    Google reviewer land4 success (chill feel good)
    land4 success (chill feel good)Verified Google review · 6 months ago
  2. I’ve used several accountants in the past, but hands down there is no one better than Harvey at Zmartly. He really understands exactly what advice you’re looking for and explains everything clearly and professionally. Nothing ever feels rushed…
    Google reviewer Heena
    HeenaVerified Google review · 4 months ago
  3. I started working with Zmartly Accountants after having serious issues with my previous accounting firm. They were missing deadlines, incorrectly calculating VAT, constantly late, and extremely difficult and frustrating to communicate with. Switching to Zmartly was a huge…
    Google reviewer Jorge Carballo Gomez
    Jorge Carballo GomezVerified Google review · 5 months ago
  4. I've had a terrible experience with multiple accountants. Zmartly have been incredible. If you do ecommerce / Amazon FBA you definitely need to go with someone who understands the complexities with it. Thanks to Harvey and his amazing…
    Google reviewer Sean Barrington
    Sean BarringtonVerified Google review · 6 months ago
  5. Its not easy to find accountants who understand ecommerce especially Amazon and these guys know Amazon very well. Always helps us with advice if they spot something we incorrectly. Super easy to speak with someone if you have…
    Google reviewer Darius Jaselskis
    Darius JaselskisVerified Google review · 6 months ago
  6. I’ve had an excellent experience working with Zmartly. Harvey and the team are professional, responsive, and genuinely supportive. They explain things clearly, stay on top of deadlines, and always look for practical ways to save tax and improve…
    Google reviewer land4 success (chill feel good)
    land4 success (chill feel good)Verified Google review · 6 months ago
  7. I’ve used several accountants in the past, but hands down there is no one better than Harvey at Zmartly. He really understands exactly what advice you’re looking for and explains everything clearly and professionally. Nothing ever feels rushed…
    Google reviewer Heena
    HeenaVerified Google review · 4 months ago
  8. I started working with Zmartly Accountants after having serious issues with my previous accounting firm. They were missing deadlines, incorrectly calculating VAT, constantly late, and extremely difficult and frustrating to communicate with. Switching to Zmartly was a huge…
    Google reviewer Jorge Carballo Gomez
    Jorge Carballo GomezVerified Google review · 5 months ago
  9. I've had a terrible experience with multiple accountants. Zmartly have been incredible. If you do ecommerce / Amazon FBA you definitely need to go with someone who understands the complexities with it. Thanks to Harvey and his amazing…
    Google reviewer Sean Barrington
    Sean BarringtonVerified Google review · 6 months ago
  10. Its not easy to find accountants who understand ecommerce especially Amazon and these guys know Amazon very well. Always helps us with advice if they spot something we incorrectly. Super easy to speak with someone if you have…
    Google reviewer Darius Jaselskis
    Darius JaselskisVerified Google review · 6 months ago
4.9
Google · based on 63 reviews
Common questions

Frequently Asked Questions

We help you raise money cleanly (SEIS/EIS advance assurance), reward your team (EMI options), recover cash (R&D relief), and get the structural decisions right, VAT registration timing, Corporation Tax, payroll and bookkeeping in Xero, QuickBooks, FreeAgent or Sage. The aim is to keep the tax efficient and HMRC-compliant while you build, not just to tidy up after year-end.

Registration is compulsory once your taxable turnover exceeds £90,000 in any rolling 12 months, or if you expect to cross it in the next 30 days; the deregistration threshold is £88,000. Some startups register voluntarily earlier to reclaim input VAT. If you sell online or through marketplaces, separate 'deemed supplier' and £135 import rules can apply, so it's worth checking before you assume you're below the line.

Yes, they're different reliefs doing different jobs. SEIS/EIS gives your investors income-tax and CGT relief on the shares they buy; R&D relief reduces your company's own tax bill or pays out a credit on qualifying innovation. Many of our startup clients use both. We just make sure grant funding and the schemes interact correctly, as some grants can reduce an R&D claim.

They're highly tax-advantaged, not entirely tax-free. There's normally no income tax on grant or on exercise (where options are granted at market value), and the eventual gain is taxed under Capital Gains Tax rather than as income. From 6 April 2026 the limits expanded, so a company can grant up to £6 million of options (up from £3 million), employ up to 500 people and let options run for up to 15 years, which brings more scale-ups back into range. The valuation, the agreement and the EMI notification to HMRC all have to be done correctly for the reliefs to hold, that's the part we handle.

Maybe. Platforms now report sellers to HMRC at 30+ sales or about £1,700 a year, but being reported isn't the same as owing tax. Selling your own used items usually isn't trading; buying to resell or making things to sell for profit usually is. If your trading income before expenses tops the £1,000 trading allowance, you need to register for Self Assessment. We'll tell you which side of the line you're on.

Without it, contractors deduct CIS tax (20% registered, 30% unregistered) from your payments, hurting cash flow. With gross payment status you're paid in full and settle tax later. To qualify you generally need net construction turnover of at least £30,000 (multiplied per partner or director) plus a clean compliance record. For most growing subcontractors it's well worth applying, we handle the application and ongoing monthly returns.

Fixed monthly pricing at £129, £250 or £499 depending on the support you need, on a rolling monthly basis with no long lock-in, and a 30-day money-back guarantee. You get a named, qualified accountant and a reply within 72 hours. We work in Xero, QuickBooks, FreeAgent and Sage, so we fit around the tools you already use.

In the very early days, with no employees and simple income, you can keep your own records and file a straightforward return, and plenty of founders do. It stops being worth doing yourself the moment the money and the decisions get real: your first raise, your first hire on share options, an R&D claim, or an investor asking for numbers you do not yet have. Those are the areas where a wrong call early is expensive to unwind, and where a startup accountant pays for themselves. If you are pre-revenue and testing an idea, wait. If you are raising, hiring or claiming, get help before you commit, not after.

Founders often search for a startup accountant near me, and the honest answer is that location barely matters now. We work with founders across the UK from a London base, and almost everything happens over video call, email and shared software, so where you are based makes no difference to the service. For a startup it matters far more that your accountant understands SEIS, EIS, R&D and investor reporting than that they sit on your high street. You get a dedicated, qualified accountant wherever you are, and we are happy to meet in person in London when it helps.

It depends on your structure. If you have set up a limited company, you must register for Corporation Tax within three months of starting to trade; Companies House tells HMRC the company exists, but the Corporation Tax registration is a separate step you have to complete. If you are a sole trader, you register for Self Assessment by 5 October following the end of the tax year in which you started trading. On top of either, you must register for VAT once your taxable turnover passes £90,000 in any rolling 12 months, or if you expect to cross it within the next 30 days. Miss a deadline and HMRC can charge penalties, so if you are not sure which clock is already running, ask early.

Stop guessing. Stop overpaying. Let's sort your tax once and for all.

Zmartly Ltd · 12 Hammersmith Grove, London W6 7AP · 020 8175 5145 · [email protected]

CIMA-regulated. Qualified accountants (ACMA, CGMA, ACCA, FCCA).