Verified AccountantsUK firms, verified against the public record
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Calculus Accounting Services Ltd

Accountant in Kings Langley WD4

Verified & RegulatedTrust Score98/100Excellent

Companies House: 114893334 Seabrook Rd, Kings Langley, WD4 8NUData updated 07 Jul 2026

In the local market

Calculus Accounting Services Ltd is one of 19 accountancy practices we verify in Kings Langley.

Verified Accountants assessment

Calculus Accounting Services Ltd is a UK limited company based in Kings Langley, incorporated in 2018 and trading for 8 years.

Public records confirm it is anti-money-laundering supervised by HMRC, up to date with its accounts (last filed 31 Jul 2025), and running a confirmed website. Its most recent filed accounts, for the year to 31 Jul 2025, report net assets of £160,658, down from £185,814 the year before. Its website shows it handles Self Assessment, VAT, Payroll, and Bookkeeping.

How we verify →

Verification record and Trust Score

98/100

Trust Score

Excellent
Public record
AML supervised · HMRC
Active company
Filing compliant
Trading 8 years
Professional qualification
  • 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. 11489333 (opens in new tab)incorporated 2018Companies House · checked 07 Jul
Registered activity
  • SIC 69201 - Accounting and auditing
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 Jul 2025 (opens in new tab)Companies House · checked 07 Jul
Anti-money-launderingSupervised by HMRCMLR XRML00000168428By law, every UK accountant must be supervised for anti-money-laundering, by HMRC or an approved professional body. Being on the HMRC supervised register means this firm is monitored and operating legitimately.HMRC AML register · checked 20 Jul
Sources: Companies House (opens in new tab), HMRC AML register (opens in new tab)
Own this firm? Claim or enhance your listing. Get in touch to claim or update this listing

Good fit for

  • Handles Self Assessment, VAT, Payroll and Bookkeeping

Specialisms and services

Services
AccountantSelf AssessmentVATPayrollBookkeepingLimited company accountsCISManagement Accounts

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People at Calculus Accounting Services Ltd

Persons with significant control (2)

  • Mr John Anthony HargreavesOwns 25-50% of shares, 25-50% of voting rights, Can appoint or remove directors
  • Mrs Sharon HargreavesOwns 25-50% of shares, 25-50% of voting rights, Can appoint or remove directors

Source: Companies House register (opens in new tab).

Related companies

Companies sharing an active director with Calculus Accounting Services Ltd on the Companies House register.

Shared directorships from the Companies House register. A shared director can mean a family or group structure; it does not by itself indicate anything adverse.

Financials (as filed)

Companies House filing history (opens in new tab) | 2022 to 2025
Net assets
£161k
as at 31 Jul 2025-£25k vs 2024
Current assets
£165k
as at 31 Jul 2025-£22k vs 2024
Average employees
3
as at 31 Jul 2025-1 vs 2024
Current assets (cash, debtors, other) and net assets by year, in £. Latest year first.
2025202420232022
CashDebtorsOtherNet assets
Full figures
As filed31 Jul 202531 Jul 202431 Jul 202331 Jul 2022
Average employees3444
Net assets£160,658£185,814£86,804£84,564
Current assets£164,549£186,437£112,591£113,819
Shareholders equity£160,658£185,814£86,804£84,564

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. 2018Company incorporated
  2. 2025Latest accounts filed
  3. 2026Verified on this directory

Frequently asked questions

Is Calculus Accounting Services Ltd a regulated accountant?

Yes. Calculus Accounting Services Ltd is supervised for anti-money-laundering by HMRC (registration XRML00000168428). 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.

What services does Calculus Accounting Services Ltd offer?

Based on its own website, Calculus Accounting Services Ltd offers Self Assessment, VAT, Payroll, Bookkeeping, Limited company accounts, and CIS. Confirm current services and availability with the firm before engaging. Message this firm →

How long has Calculus Accounting Services Ltd been established?

Calculus Accounting Services Ltd was incorporated at Companies House in 2018, so it has been on the register for about 8 years. A longer trading history is one sign of an established, accountable firm, though a newer firm is not necessarily less capable.

Does Calculus Accounting Services Ltd file its accounts on time?

Yes. According to Companies House, Calculus Accounting Services Ltd'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 Calculus Accounting Services Ltd?

We build this record only from public, authoritative sources - for this firm, Companies House and HMRC AML register, 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. Calculus Accounting Services Ltd scores 98/100. Nothing in the score is subjective, and every rule is listed on this page. How we verify →

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