Accountants In London

From Shoreditch startups to Mayfair family offices, London businesses need their books reconciled, their VAT filed under Making Tax Digital, and their corporation tax and Self Assessment returns prepared properly and on time. Next Tax Source runs the full finance function continuously and routes every return to a chartered accountant for review and signature before it reaches HMRC or Companies House.

Who This Is For

London is not one market but many, and the right accounting setup depends entirely on which one you are in. A pre-seed founder paying themselves a token salary has very different needs from a property investor with a portfolio across several boroughs, or a US executive on secondment who has suddenly become UK tax-resident. The clients we serve in London tend to fall into a handful of groups:

• Owner-managed limited companies — agencies, consultancies, tech and e-commerce businesses where the director's salary-and-dividend mix drives the whole tax position.
• Startups and scale-ups needing clean management accounts for investors, R&D claims and EMI option schemes handled properly.
• Landlords and property investors navigating finance-cost restriction, capital gains and the choice between personal and corporate ownership.
• Self-employed professionals and contractors with Self Assessment, IR35 considerations and quarterly obligations on the horizon.
• Internationally mobile individuals and family offices with cross-border income, residence and domicile questions.

What UK Compliance Actually Involves

A UK limited company carries a recurring set of obligations to two separate bodies — HMRC for tax and Companies House for statutory filings — and the dates rarely line up neatly. Running them as one coordinated calendar, rather than a series of last-minute fire drills, is most of the value a good accountant adds.

• Corporation tax (CT600) — the return is due twelve months after your year-end, but the tax itself is payable earlier, nine months and a day after. We prepare both to a ready-to-sign standard with full computations.
• Companies House accounts and confirmation statement — filed on their own deadlines, with the right level of disclosure for your company size.
• VAT under Making Tax Digital — registration once you cross the rolling turnover threshold, then digital quarterly returns. Check the current VAT registration threshold on gov.uk before you assume you are below it.
• PAYE and RTI — a submission to HMRC on or before every payday, plus pensions auto-enrolment and year-end P11Ds for benefits in kind.
• Self Assessment — for directors, landlords and the self-employed, due by 31 January after the tax year, coordinated with the company position.

Rates and thresholds in the UK change frequently — corporation tax bands, dividend rates, the VAT threshold and the staged rollout of Making Tax Digital for Income Tax have all moved recently. We confirm the figures that apply to your year against current HMRC guidance rather than working from last year's numbers.

Common Mistakes We Are Asked To Fix

The errors that bring London businesses to us are seldom dramatic — they are quiet, cumulative and easy to make when nobody is watching the books between January deadlines.

• Taking dividends with no distributable reserves — an illegal dividend that has to be unwound, often with personal tax consequences.
• Overdrawn director's loan accounts triggering a section 455 tax charge that the owner never saw coming.
• Missing the VAT registration threshold by watching the wrong period, then facing backdated VAT and penalties.
• Late confirmation statements or accounts at Companies House, which carry automatic penalties and can flag the company as non-compliant.
• A salary-and-dividend split set once and never revisited, even though the optimal mix shifts as rates and allowances change.

How Next Tax Source Handles It

We pair an always-on team of specialist AI agents with licensed human review. The agents reconcile your books continuously, keep your filings tracked against a single compliance calendar, and assemble each return — CT600, VAT, payroll, Self Assessment — to a ready-to-sign standard with complete workpapers. A chartered accountant then reviews and signs before anything is submitted to HMRC or Companies House. Preparation is automated and fast; sign-off is human and accountable.

Because we run the company and the directors' personal positions together, the salary-versus-dividend decision is optimised across both rather than in isolation. And if you have interests in the US or UAE as well, our cross-border specialists make sure a position taken in London does not create an unexpected liability elsewhere.

Why The Always-On Model Suits London

A traditional high-street firm tends to see your numbers once a year, when the accounts are drawn up and the deadline is already close. For a fast-moving London business that is too late to be useful — by the time a problem appears in the year-end file, the decisions that caused it are months behind you. Our model is built the other way round.

• Continuous bookkeeping means your management accounts are current, so you make decisions on real numbers rather than a stale snapshot.
• Proactive tax planning — the salary-and-dividend split, pension contributions, capital purchases and timing are reviewed during the year, while you can still act on them.
• Deadlines tracked centrally against one compliance calendar, so corporation tax, VAT, payroll, confirmation statements and Self Assessment never collide unexpectedly.
• Faster turnaround on questions and filings, because preparation is automated and only the review-and-sign step waits on a human.

The result is the responsiveness of an in-house finance team with the assurance of a chartered accountant's signature on everything that goes to HMRC or Companies House.

What To Prepare

To make a first conversation productive, it helps to have a few things to hand — though we are just as comfortable starting from a shoebox of receipts as from a tidy ledger.

• Your company registration number and accounting reference date
• Any HMRC references — UTR, VAT and PAYE — already issued
• Access to your bookkeeping software, or your most recent accounts
• An idea of how you currently take money out of the business
• Details of any property, overseas income or share schemes

You can also get an indicative picture first with our UK calculators for income tax, corporation tax, VAT and take-home pay.

Questions People Ask