Ask a qualified accountant what FRS 102 is, and you will get a competent answer in about fifteen seconds. Ask the same person whether every set of small company accounts leaving their office this month applies it the same way, and the answer takes rather longer.
That gap is where the work actually sits. Most guides answering what FRS 102 is are written for company directors deciding what their own business has to file. The framework itself is documented and examined. Applying it consistently across eighty clients is a separate problem, and the standard does not address it.
So this guide covers the framework, the thresholds that determine which tier a client falls under, what the periodic review changed, and where disclosure errors cluster. It is written for people who prepare accounts for a living.
What is FRS 102?
FRS 102 is the main financial reporting standard for the UK and the Republic of Ireland. The Financial Reporting Council defines it as a single standard that applies to entities that are not using IFRS, FRS 101, or FRS 105. It governs how those entities measure transactions and what they have to disclose.
It replaced the old patchwork of individual UK standards, and it is deliberately shorter than full IFRS. The FRC states that the requirements in FRS 102 are based on the IASB's IFRS for SMEs Accounting Standard, with significant amendments made for application in the UK and the Republic of Ireland. Some of those amendments are substantial. The FRC notes that Section 20 on leases was replaced entirely rather than adjusted.
For a practice, the useful way to hold it is as the default. A UK company preparing accounts under UK GAAP is on FRS 102 unless something specific moves it elsewhere, and the something specific is usually size.
That last point is worth labouring, because it is where the practical answer to what is FRS 102 diverges from the textbook one. Small entities apply the reduced disclosure regime in Section 1A of the same standard. Section 1A is a subset of FRS 102, not a separate framework, so a client moving into or out of it has not changed standards at all.
Who does FRS 102 apply to?
FRS 102 applies to entities preparing general purpose financial statements that are not using adopted IFRS, FRS 101 or FRS 105. That covers companies of every size that have not adopted IFRS, and it reaches well beyond companies. The FRC is explicit that the standard applies to entities not constituted as companies and to entities that are not profit-oriented.
For a typical UK practice, that means most of the limited company client base, along with charities, LLPs, pension schemes and other bodies where a specialised SORP sits on top of FRS 102 rather than replacing it. Groups reporting under IFRS for consolidation purposes often still have subsidiaries on FRS 102 or FRS 101, which is where much of the confusion starts.
Scale is worth stating plainly. Companies House reported a UK register of 5.43 million companies as at 31 March 2025, with an annual accounts filing rate of 98.5 per cent and 14.7 million filings accepted across the year. The overwhelming majority of those companies are small or micro. The version of FRS 102 most accountants actually spend their working lives in is Section 1A, not the full standard, which is worth remembering when reading guidance written by and for the large-company end of the profession.
The size thresholds that decide which framework a client sits under
Size determines the framework and the disclosure regime, and the thresholds moved recently. The Companies (Accounts and Reports) (Amendment and Transitional Provision) Regulations 2024 came into force on 6 April 2025 and raised every monetary size threshold. A company meets a category by satisfying two of the three criteria.
The increases were large. Crowe UK's comparison of the old and new figures puts the previous small company turnover limit at £10.2 million, up from £15 million now. The micro-entity limit rose from £632,000 to £1 million, and the medium-sized limit rose from £36 million to £54 million.
Two things follow. Clients that were medium-sized last year may be small this year, which changes the disclosure set and can change the audit position. And the year of grace rule still applies, so a company does not switch category until it has failed the test in two consecutive financial years.
Neither of those is technically difficult. Both are easy to miss on a client you have prepared the same way for six years.
FRS 102 and the other UK frameworks
Four frameworks sit in the UK reporting regime, and the choice between them is settled by size and by group structure. FRS 102 is the default under UK GAAP. FRS 105 is the micro-entities standard. FRS 101 is a reduced disclosure framework for qualifying subsidiaries and parents inside an IFRS group. Adopted IFRS is mandatory for listed groups.
FRS 105 comes up most often in general practice. It is available only to companies meeting the micro-entity criteria, it strips disclosure back very hard, and it prohibits some treatments FRS 102 permits, including revaluation of fixed assets and recognition of deferred tax. Qualifying does not make it the right answer, and that is a decision worth taking deliberately rather than by default.
FRS 101 gets forgotten because it is rare outside group work. It lets a qualifying subsidiary use IFRS recognition and measurement while taking substantial disclosure exemptions, which suits a subsidiary whose parent already reports under IFRS. Its difference from FRS 102 is the measurement basis, so the subsidiary's numbers agree with the group consolidation without a reconciliation.
Adopted IFRS and FRS 102 are related without being interchangeable. FRS 102 is UK GAAP, drawn from the IFRS for SMEs Standard and then amended for UK company law.
What did the FRS 102 periodic review change?
The FRC's Periodic Review 2024 amendments are effective for accounting periods beginning on or after 1 January 2026, with early application permitted. Separate supplier finance arrangement disclosures took effect a year earlier, for periods beginning on or after 1 January 2025. Both are live now rather than approaching.
Two changes carry most of the work. Lease accounting moves to an on-balance-sheet model for lessees, with a right-of-use asset and a lease liability replacing the operating and finance lease split, subject to exemptions for short-term and low-value leases. Revenue recognition moves to a five-step model built on the IFRS 15 approach. ACCA's May 2025 summary states that entities applying FRS 105 are unaffected by the lease changes, which is usually the first question a practice asks about its micro client base.
The date matters more than it looks. A client with a 31 December 2026 year end is inside the first affected period right now, and the transition work lands in the file you are preparing this year. Any firm still describing the periodic review as something to prepare for is running about a year behind.
The FRC has been adding support material as preparers hit the changes. On 9 September 2025 it issued two further factsheets, number 12 on presentation of the financial statements and number 13 on the going concern basis of accounting for small companies and micro-entities.
The hard part is not understanding the new model. It is making sure the same lease is treated identically by two people in two offices during a transition year, when the treatment rests on judgements nobody wrote down. Active builds accounts datasets straight from Xero, QuickBooks Online, FreeAgent or a CSV trial balance, then produces iXBRL-tagged accounts ready to file with Companies House across FRS 102 1A, 105 & Dormant Company Accounts. In a transition year the useful part is that the treatment lives in the template rather than in the memory of whoever last opened the file.
Where firms most often get FRS 102 disclosure wrong
Most FRS 102 disclosure problems are consistency problems rather than knowledge problems. The errors that recur inside a practice are the ones where the standard permits a choice, the choice was made correctly once, and nobody recorded which choice was made. A year later somebody else makes the other one.
Related party disclosure is the standing example. Section 1A requires disclosure of certain related party transactions, the boundary of what counts is a judgement, and two preparers reading the same standard will draw that boundary in slightly different places. So will the same preparer eighteen months apart.
Accounting policy notes fail the same way. They get carried forward without anyone checking they still describe what the accounts do, which is precisely what a change of framework or a threshold reclassification breaks.
Then the mechanical ones. Comparatives not restated after a reclassification. Going concern wording untouched since it was first written, which is the gap the FRC's Factsheet 13 addresses for small companies and micro-entities. An average employee number omitted, easy to lose when accounts are assembled from a trial balance rather than a full working file.
None of this argues for an FRS 102 disclosure checklist as such, since most firms already have one. It argues for the checklist and the file being the same object, so the answer given on one client is visible when the same question arrives on the next. That is what applying consistent processes across offices is supposed to achieve, and spreadsheet-based preparation makes it structurally hard.
If the work papers supporting the accounts also live somewhere the reviewer cannot see, the disclosure decision cannot be checked against the evidence behind it, and review degrades into proofreading.
The question of what is FRS 102 rarely causes trouble in a practice. Applying it identically eighty times a year does, and that is a process problem rather than a technical one. The firms handling it well are the ones that made the recurring judgements once, wrote them into a template, and stopped re-deciding them client by client. If you would rather the framework decision and the disclosure set were carried by the file instead of by whoever happens to open it, that is roughly what Active's accounts production module is for. Sign up and try it with your own client data, and pick a transition-year client, because that is where inconsistency surfaces first.
Frequently asked questions
Is FRS 102 UK GAAP?
Yes. FRS 102 is the principal standard within UK GAAP, so the two terms overlap without being identical. UK GAAP is the whole regime, taking in FRS 100, FRS 101, FRS 102, FRS 103 and FRS 105. FRS 102 is the standard most UK entities inside that regime actually apply.
Is UK GAAP the same as FRS 102?
Not quite, and the distinction occasionally matters in correspondence. UK GAAP is the broader framework and FRS 102 is one standard inside it. An entity applying FRS 105 is using UK GAAP but is not applying FRS 102. In everyday practice the terms get used interchangeably, which is usually harmless.
Is FRS 102 the same as IFRS?
No. The FRC states that FRS 102 is based on the IASB's IFRS for SMEs Accounting Standard, with significant amendments for the UK and Republic of Ireland, and the IFRS for SMEs Standard is itself a simplified version of full IFRS. Section 20 on leases was replaced entirely.
What is a small entity under FRS 102?
A company qualifying as small under the Companies Act. Since 6 April 2025 that means meeting two of three criteria: turnover not more than £15 million, balance sheet total not more than £7.5 million, and not more than 50 employees. Small entities may apply the reduced disclosures in Section 1A.
Who can use FRS 102?
Any entity preparing general purpose financial statements that is not applying adopted IFRS, FRS 101 or FRS 105. There is no size restriction, and eligibility is not limited to companies. The FRC confirms the standard reaches entities not constituted as companies and entities that are not profit-oriented.
What is FRS 102 and 105?
Two UK standards for different sizes of entity. FRS 102 is the general standard, with Section 1A providing reduced disclosures for small companies. FRS 105 applies only to micro-entities, currently turnover not more than £1 million and balance sheet total not more than £500,000, and cuts disclosure considerably harder.
What is the difference between FRS 101 and FRS 102?
FRS 101 applies IFRS recognition and measurement with reduced disclosures, and is open only to qualifying subsidiaries and parents within an IFRS group. FRS 102 uses UK GAAP measurement and is open to any entity not using adopted IFRS or FRS 105. The measurement basis is the real difference.