Most UK businesses do not reach their fifth birthday. Across all industries, ONS Business Demography 2024 data shows that only 38.4% of businesses born in 2019 were still active five years later.[1] For law firms, the picture is materially different: 59.8% of businesses registered under SIC 691 (Legal activities) from the same cohort survived to five years, a gap of 21.4 percentage points over the all-industry figure.
That is not a rounding difference. It places legal activities among the most durable business categories in the UK economy, ahead of the broader professional, scientific and technical sector (SIC M, 40.1% at five years) and well clear of the all-industry baseline.
Understanding why legal businesses outperform, and understanding the circumstances of the roughly 40% that still do not make it, is directly relevant to solicitors, partners and sole practitioners assessing their firm's financial position and long-run sustainability.
The ONS Data: What It Shows
ONS Business Demography is an annual publication drawing on the Inter-Departmental Business Register (IDBR). It tracks business births and deaths across sectors and measures cohort survival at one, two, three, four and five years. Legal activities (SIC 691) is tabulated separately from the broader SIC 69 grouping, which combines legal and accounting businesses and produces a lower survival figure across every time horizon.[1]
An important definitional point: a business death in ONS terms is not the same as an insolvency. It includes any exit from the IDBR, covering voluntary closures, firm mergers and acquisitions, de-registrations, dissolutions and genuine insolvencies. In a sector where mergers and planned retirements are common, a proportion of the 40% that do not survive to five years will have exited in an orderly or intentional way rather than through financial distress. The survival figures should be read with this in mind.
Survival Rate Comparison: Legal Activities vs All Industries
The table below shows 2019 cohort survival rates at each interval for which full data is available. The 2019 cohort is the only one with a complete five-year series in ONS Business Demography 2024.[1]
| Survival year | Legal activities (SIC 691) | Prof, sci & tech (SIC M) | All industries | Legal vs all-industry gap |
|---|---|---|---|---|
| 1 year | 96.2% | 95.5% | 94.6% | +1.6 pp |
| 2 years | 84.8% | n/a | 74.7% | +10.1 pp |
| 3 years | 72.4% | 58.4% | 55.9% | +16.5 pp |
| 4 years | 64.6% | n/a | 45.0% | +19.6 pp |
| 5 years | 59.8% | 40.1% | 38.4% | +21.4 pp |
Source: ONS Business Demography 2024, 2019 birth cohort, Tables 4.2 and 5.2a-e. SIC M five-year figure from Table 4.2. pp = percentage points.[1]
The gap widens steadily over time. At one year, legal activities leads all-industry by only 1.6 percentage points. By year three, that gap has grown to 16.5 percentage points. By year five, it stands at 21.4 percentage points. The divergence is not driven by a single difficult year; it compounds across the full window.
The pattern holds across multiple cohorts. The 2020 cohort shows legal activities at 84.2% survival at two years and 74.0% at three years (the furthest available). The 2021 cohort shows 83.7% at two years and 75.4% at three years. The 2022 cohort shows 86.4% at two years. The 2023 cohort, with one year of data only, shows 96.8% survival at year one, the highest one-year figure in the series.[1]
Why Legal Businesses Survive Longer
The outperformance is structural rather than cyclical. Several factors apply simultaneously.
Regulatory barriers to entry
SRA authorisation is a genuine filter. A business wishing to offer reserved legal activities must meet minimum financial, insurance and governance requirements before it can trade. This pre-filters the birth cohort toward operators with sufficient capital and planning to meet an external standard. Sectors with low barriers to entry admit many businesses that would not survive early operational stress.[2]
Repeat and referral-based client relationships
Legal work is not primarily transactional in the commodity sense. Many practice areas, including family law, corporate, employment and commercial property, generate work through long-run client relationships and professional referral networks. Revenue streams built on existing relationships are more predictable and more defensible than those dependent on customer acquisition. A firm with a stable panel of commercial clients or a steady conveyancing referral pipeline has a fundamentally different risk profile from a restaurant or retail business competing for first-time buyers.
Reputational capital and switching costs
Clients face real switching costs when changing legal advisers, including re-briefing time, uncertainty about new firm quality, and the disruption of ongoing matters. This creates a degree of natural retention that pure price-based competition cannot easily erode. For commercial clients in particular, the cost of moving a panel relationship outweighs modest fee differentials.
Mandatory compliance infrastructure
SRA Accounts Rules, the requirement to hold a valid practising certificate, and the obligation to maintain qualifying professional indemnity insurance throughout the firm's life collectively create compliance infrastructure that would, in other sectors, be optional. This infrastructure produces early-warning mechanisms for financial distress that do not exist in less regulated markets.
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Why the 40% Still Fail
The structural advantages above do not make law firms immune to financial failure. The 40% of legal activities businesses that did not survive to five years in the 2019 cohort illustrates that clearly. The common financial failure modes are well-documented, even if ONS data does not break them out by sector.
Lock-up and cashflow erosion
Lock-up, the combined time between completing work, raising a bill, and collecting payment, is the primary cashflow lever in legal practice. A firm carrying 180 days of combined WIP and debtor lock-up is financing six months of completed work from its own capital at all times. As fee volumes grow, so does the capital requirement. Firms that grow without actively managing lock-up can find themselves profitable on paper and illiquid in practice. Our guide to law firm lock-up reduction covers the levers in detail.
Undercapitalised succession
Partner retirements require capital to fund goodwill payments, WIP buy-outs and capital account withdrawals. Firms that have not modelled these liabilities in advance, or that do not have partnership agreements specifying the mechanism clearly, can face a succession event that outstrips working capital. This is particularly acute for smaller practices where one or two partners carry disproportionate client relationships.
Inadequate tax reserves
Partners in LLPs and traditional partnerships pay income tax on profit shares via self-assessment, with payments on account in January and July. A firm that does not maintain partner tax reserve accounts, or where drawings consistently exceed net-of-tax income, accumulates a deferred liability that becomes visible only at the January payment date. Proactive partner tax planning addresses this through quarterly drawings reconciliation and year-round reserve modelling.
Client concentration
A practice where 50% or more of fee income derives from a single client or panel relationship carries substantial undiversified revenue risk. Loss of that relationship, whether through competitive re-tender, in-house instruction or a change in the client's own circumstances, can be existential. The survival advantage of legal businesses does not override firm-specific concentration risk.
Regulatory enforcement
A proportion of law firm exits result from SRA intervention rather than financial failure in the conventional sense. Breaches of the Accounts Rules, inadequate supervision of client money, or conduct issues can trigger practice suspension or closure independently of the firm's financial position. Robust COFA function and external COFA and COLP compliance support reduce this risk.
What This Means for Partners and Sole Practitioners
The 21-percentage-point outperformance over all-industry is worth understanding clearly, but not misreading. It describes the average behaviour of a population of legal businesses. It does not describe any individual firm's probability of survival, which depends on its own financial management, client base, structure and governance.
The data has two practical implications for practising solicitors and partners.
First, the structural durability of legal businesses is a genuine competitive asset when dealing with banks, landlords and other counterparties. Lenders and suppliers who understand the ONS data know that a well-run law firm is a significantly more durable business than the typical UK SME. That translates into credit terms, lease negotiations and commercial relationships.
Second, the structural advantage does not operate automatically. The firms that contribute to the 59.8% five-year survival figure are not uniformly managed, financed or structured. They include firms with active cashflow management, disciplined lock-up controls, properly funded partner succession and rigorous tax reserve processes. Firms that rely on the sector's reputation rather than their own financial discipline are exposed to the same failure modes as businesses in less advantaged sectors.
The Law Firm Survival Index contains the full ONS cohort data series, including year-by-year survival figures for the 2019 to 2023 birth cohorts across SIC 691, SIC 69 and the all-industry baseline. The UK Legal Incorporation Index covers new business registrations in the legal sector by year, providing context on the birth-rate trends that determine the size of each cohort.
For sole practitioners and partnerships assessing their own financial resilience, the starting point is practice valuation and succession planning and LLP and partnership accounting built around the specific financial structure of the firm.
Sources
- Office for National Statistics, Business Demography 2024, Tables 4.2 and 5.2a-e, published 20 November 2025. Available at ons.gov.uk. Licensed under the Open Government Licence v3.0 (nationalarchives.gov.uk/doc/open-government-licence/version/3/). Extracted figures published at /research/law-firm-survival-index.
- Solicitors Regulation Authority, Authorisation of firms, SRA Standards and Regulations 2019. Available at sra.org.uk.