Verified AccountantsUK firms, verified against the public record
Neptune Tax Limited website icon

Neptune Tax Limited

Tax adviser in Moorgate, London WC1N

Verified & RegulatedTrust Score98/100Excellent

Companies House: 13588108Monomark House, 27 Old Gloucester Street, London, WC1N 3AXData updated 07 Jul 2026

Verified Accountants assessment

Neptune Tax Limited is a UK limited company based in London, incorporated in 2021 and trading for 5 years.

Public records confirm it is anti-money-laundering supervised by CIOT, a member firm of CIOT, up to date with its accounts (last filed 31 Aug 2025), and running a confirmed website. Its most recent filed accounts, for the year to 31 Aug 2025, report net assets of £51,547, down from £62,920 the year before. Its website shows it handles Self Assessment.

How we verify →

Verification record and Trust Score

98/100

Trust Score

Excellent
Public record
AML supervised · CIOT
Active company
Filing compliant
Trading 5 years
Professional qualification
  • ATT
  • CIOT
  • ICAEW
  • ACCA
  • AAT
Contact
Website
Phone
Email

The Trust Score is the share of the applicable public signals we have verified, scored out of 100 - fully deterministic, never subjective. How it is scored, and every signal's points →

Companies HouseActiveno. 13588108 (opens in new tab)incorporated 2021Companies House · checked 07 Jul
Registered activity
  • SIC 69203 - Tax consultancy
The business activity the firm registered with Companies House (its Standard Industrial Classification).Companies House · checked 07 Jul
Filing complianceAccounts and confirmation statement filed on timelast accounts 31 Aug 2025 (opens in new tab)Companies House · checked 07 Jul
Anti-money-launderingSupervised by CIOTCIOT is one of the professional bodies approved to supervise accountants for anti-money-laundering. Every UK accountant must be supervised, by HMRC or an approved professional body, so this confirms the firm is monitored and operating legitimately.firm website · checked 29 Jul
Professional bodyMember firm of CIOTCTAChartered Institute of Taxation (CIOT) is a UK professional accountancy body. Member firms must meet its qualification and conduct standards and can be disciplined by it.probody-ciot · checked 30 Jul
Professional bodyMember firm of ATTATTAssociation of Taxation Technicians (ATT) is a UK professional accountancy body. Member firms must meet its qualification and conduct standards and can be disciplined by it.probody-att · checked 30 Jul
Sources: Companies House (opens in new tab), firm website (opens in new tab), probody-ciot, probody-att
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Good fit for

  • Handles Self Assessment
  • Open seven days a week

Specialisms and services

Services
Self Assessment
Tax
National InsurancePartnershipsPayroll and EmploymentPensionsPersonal TaxPersonal Tax - UK AdvisoryPersonal Tax - UK compliance

Message this firm

Send an enquiry and we will pass it to Neptune Tax Limited. No account needed - just your contact details and what you need help with.

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Registered address

Shared with 132 companies registered at this address (Monomark House (British Monomarks)). An address used by this many companies is a shared, serviced or virtual office - not a dedicated one.

See all 132 companies at this address

Addresses

Registered office Companies House
Monomark House, 27 Old Gloucester Street, London, WC1N 3AX
Office Google Business Profile
1 Fore St Ave, Moorgate, London, EC2Y 9DT

The registered office is the firm's address on the Companies House register; the office is the trading address on its confirmed Google Business Profile. They can differ.

Financials (as filed)

Companies House filing history (opens in new tab) | 2022 to 2025
Net assets
£52k
as at 31 Aug 2025-£11k vs 2024
Current assets
£276k
as at 31 Aug 2025+£113k vs 2024
Cash at bank
£53k
as at 31 Aug 2025-£9.7k vs 2024
Average employees
10
as at 31 Aug 2025+6 vs 2024
Current assets (cash, debtors, other) and net assets by year, in £. Latest year first.
2025202420232022
CashDebtorsOtherNet assets
Full figures
As filed31 Aug 202531 Aug 202431 Aug 202331 Aug 2022
Average employees10432
Net assets£51,547£62,920£11,828£806
Cash at bank£53,351£63,041£33,840£1,875
Current assets£275,879£162,540£81,707£10,225
Debtors£119,528£99,499£47,867£8,350
Shareholders equity£51,547£62,920£11,828£806

Figures as reported in this firm's accounts filed at Companies House. Net assets is total assets less what the company owes; a figure below zero means recorded liabilities exceed assets. Small companies may file abbreviated accounts that omit turnover and profit. Public record, reproduced as facts.

Timeline

  1. 2021Company incorporated
  2. 2025Latest accounts filed
  3. 2026Verified on this directory

Frequently asked questions

Is Neptune Tax Limited a regulated accountant?

Yes. Neptune Tax Limited is a member firm of CIOT and ATT, and is supervised for anti-money-laundering by CIOT. Every UK accountant must be supervised for anti-money-laundering, by HMRC or an approved professional body, so this confirms the firm is authorised to practise and monitored for compliance.

Is Neptune Tax Limited a chartered accountant?

Neptune Tax Limited is a member firm of CIOT and ATT, a UK professional accountancy body, but it is not a chartered firm. Chartered status is conferred only by bodies such as ICAEW, ICAS or ACCA.

Where is Neptune Tax Limited based?

Neptune Tax Limited's registered office is Monomark House, 27 Old Gloucester Street, London, WC1N 3AX, but it trades from 1 Fore St Ave, Moorgate, London, EC2Y 9DT (from its confirmed Google Business Profile). A registered office is the address on the Companies House register and can differ from where a firm actually works.

What services does Neptune Tax Limited offer?

Based on its own website, Neptune Tax Limited offers Self Assessment. Confirm current services and availability with the firm before engaging. Message this firm →

How long has Neptune Tax Limited been established?

Neptune Tax Limited was incorporated at Companies House in 2021, so it has been on the register for about 5 years. A longer trading history is one sign of an established, accountable firm, though a newer firm is not necessarily less capable.

Does Neptune Tax Limited file its accounts on time?

Yes. According to Companies House, Neptune Tax Limited's most recent statutory accounts were filed by their due date. On-time filing is a basic sign that a company is being administered properly.

How do you verify Neptune Tax Limited?

We build this record only from public, authoritative sources - for this firm, Companies House, firm website, probody-ciot, and probody-att, and stamp every claim with its source and the date we last checked it. We show only what we can verify and say so plainly when we cannot. How we verify →

How is the Trust Score calculated?

The Trust Score is fully deterministic: fixed points for public, verified signals - an active company, anti-money-laundering supervision, filing compliance, a confirmed website and trading history. Neptune Tax Limited scores 98/100. Nothing in the score is subjective, and every rule is listed on this page. How we verify →

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