National Audit Office
The National Audit Office is the UK's independent Supreme Audit Institution, supporting Parliament in holding government to account for public spending through statutory audits of departments and public-sector bodies, value-for-money reviews, and transparency tools, funded via parliamentary appropriations.
- Company typePrivate
- Founded1987
- HeadquartersLondon, United Kingdom
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What National Audit Office does
The National Audit Office (NAO) is the UK's independent Supreme Audit Institution, established in 1983 to support Parliament in holding the government to account for public spending. It is a statutory parliamentary body led by the Comptroller & Auditor General (C&AG), who is an officer of the House of Commons and independent of government; NAO staff are not civil servants and do not report to ministers. The organisation audits the accounts of all UK government departments and many other public sector bodies, examines whether public resources are used efficiently, effectively, and with economy, and reports findings directly to Parliament (principally the Public Accounts Committee).
The NAO's core outputs are publicly available products rather than commercial software. These include published audit reports (covering financial audit and value-for-money reviews), Insights offering best-practice guidance, departmental Overviews, a Recommendations Tracker consolidating all post-April-2019 recommendations, a Work in Progress schedule of forthcoming publications, whistleblowing disclosure handling (where the C&AG acts as a prescribed person under PIDA), and Freedom of Information services. The technology footprint is primarily a digital publishing platform at nao.org.uk; no proprietary commercial technology products were identified. The organisation is Cyber Essentials Plus certified.
The NAO is funded entirely through parliamentary supply estimates rather than commercial revenue; it does not operate a pricing model, charge fees for services, or sell products. Its sole institutional customer is the UK Parliament, with downstream coverage of all government departments and many public sector bodies. Recent activity has spanned high-profile audits including the Bank of England's £431m RTGS replacement (completed April 2025), HS2, HMRC fraud analytics, the Palace of Westminster Restoration, and Devolution in England.
National Audit Office firmographics
Firmographics- Name
- National Audit Office
- Legal name
- National Audit Office
- Website
- https://nao.org.uk
- Company type
- Private
- Founded year
- 1987
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- The National Audit Office is the UK's independent Supreme Audit Institution, supporting Parliament in holding government to account for public spending through statutory audits of departments and public-sector bodies, value-for-money reviews, and transparency tools, funded via parliamentary appropriations.
- Ownership category
- akta.pro rank
National Audit Office industry classification
Industry- Product category
- Public Sector Audit Services
- NAICS
- Public Finance Activities (921130), Executive, Legislative, and Other General Government Support (921)
- akta.pro primary industry
- Financial Risk, Controls & Audit (Public Sector) (BPAIAEAH)
- akta.pro secondary industries
- Government Accounting & Financial Reporting (BPAIAEAD), Central Government Policy, Strategy & Performance (incl. OMB-style functions) (BPAIAAAB)
Keywords
Where National Audit Office is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
National Audit Office business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Infrastructure, Technology or R&D
Distribution channels1 record
Marketing channels8 records
National Audit Office product offering
Product offeringCore offering
The NAO audits the accounts of all UK government departments and many other public sector bodies, and publishes independent value-for-money reviews examining how well government is delivering public services. It supports Parliament — particularly the Public Accounts Committee — in scrutinising public spending, handles whistleblowing disclosures about public sector wrongdoing, and publishes insights, overviews, a recommendations tracker, and a forward schedule of work in progress.
Product overview
The National Audit Office operates as a unified audit and accountability service rather than a software product platform. The core offerings consist of published audit reports covering government value-for-money performance, insights providing best practice guidance, departmental overviews, a recommendations tracker for monitoring government responses, and a forward schedule of work in progress. Supporting services include whistleblowing disclosure handling and Freedom of Information request processing. The NAO does not offer commercial software products but provides public sector auditing and accountability services to Parliament.
Differentiator
Problem solved
Functional benefit
Products and services
- Published Reports
Quantifiable outcome
- The NAO completed an audit of the Bank of England's £431m RTGS system replacement project, completed in April 2025 after beginning in 2017.
Companies that use National Audit Office
Customer profileSegments2 records
Ideal customer profiles2 records
National Audit Office technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
National Audit Office partnerships and signals
Strategic signalRecent moves5 records
Expansion highlights4 records
National Audit Office competitors and assessment
Company assessmentDirect peers
- U.S. Government Accountability Office: The U.S. Supreme Audit Institution, supporting Congress by auditing federal programmes and providing independent analysis — structurally the closest international analogue to the NAO in mandate, constitutional independence, and breadth of coverage.
- Australian National Audit Office: Australia's parliamentary audit office, reporting to the Australian Parliament on the efficiency and effectiveness of public sector performance — directly comparable in institutional design and parliamentary accountability function.
- Office of the Auditor General of Canada: Canada's federal SAI, independent of government and reporting to Parliament on federal spending — a like-for-like Commonwealth peer with very similar statutory framing to the NAO.
- Swedish National Audit Office (Riksrevisionen): Sweden's independent parliamentary audit body, auditing central government activities and reporting findings to the Riksdag — a comparable small, highly independent SAI in a Westminster-adjacent governance model.
Broad incumbents
- European Court of Auditors: The EU's external auditor, examining the finances of all EU institutions and member-state spending of EU funds — a broader, supranational SAI with an overlapping value-for-money audit function.
- Bundesrechnungshof (German SAI): Germany's federal audit institution, advising Parliament and government on federal budgetary matters — comparable in mandate scale and statutory independence, though operating within a federal rather than unitary system.
Regional players
- Audit Scotland: Scotland's public-sector audit body, responsible for auditing Scottish public bodies and reporting to the Scottish Parliament — a regional peer operating under the same NAO Code of Audit Practice but in a devolved context.
- Audit Wales: Wales's statutory auditor of Welsh public bodies, including the Welsh Government and NHS Wales — a regional SAI operating alongside but independently from the UK NAO, serving a devolved parliament.
- Northern Ireland Audit Office: Supports the Northern Ireland Assembly by auditing the accounts of Northern Ireland departments and public bodies — a direct regional peer that mirrors the UK NAO's parliamentary audit role at a devolved level.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
National Audit Office social profiles
Digital presenceNational Audit Office compliance and trust
Trust signalCompliance1 record
National Audit Office financial estimates
Financial estimateRevenue estimate
Valuation estimate
National Audit Office leadership team
Management profileNumber of profiles
Profiles1 record
National Audit Office funding detail
Funding detailFunding overview
Funding rounds
Investors
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National Audit Office M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about National Audit Office
What does National Audit Office do?
The NAO audits the accounts of all UK government departments and many other public sector bodies, and publishes independent value-for-money reviews examining how well government is delivering public services. It supports Parliament — particularly the Public Accounts Committee — in scrutinising public spending, handles whistleblowing disclosures about public sector wrongdoing, and publishes insights, overviews, a recommendations tracker, and a forward schedule of work in progress.
Is National Audit Office a public or private company?
National Audit Office is a private company. It is classified as state government owned and is currently operating.
When was National Audit Office founded?
National Audit Office was founded in 1987. It employs 501 to 1,000 people.
Where is National Audit Office based?
National Audit Office is headquartered in London, United Kingdom, in the Europe region.
Who are National Audit Office's main competitors?
Direct peers on record are U.S. Government Accountability Office, Australian National Audit Office, Office of the Auditor General of Canada and Swedish National Audit Office (Riksrevisionen). Broad incumbents are European Court of Auditors and Bundesrechnungshof (German SAI). Regional players are Audit Scotland, Audit Wales and Northern Ireland Audit Office.
Does National Audit Office have an API?
No public API is recorded for National Audit Office.
What industry is National Audit Office in?
National Audit Office's product category is Public Sector Audit Services. Its primary akta.pro industry code is BPAIAEAH, Financial Risk, Controls & Audit (Public Sector), with a secondary code of BPAIAEAD, Government Accounting & Financial Reporting. Its NAICS code is 921130.