Original research

Half a million UK trade businesses are missing from the official business register

Britain counts its construction businesses twice. The Department for Business and Trade puts the figure at 885,485 at the start of 2025 — more than any other single industry. The Office for National Statistics, counting only businesses registered for VAT or PAYE, finds about 385,000. The difference is roughly 500,485 construction businesses — 57% of the industry — that exist in the national estimate but not on the official register. They are, overwhelmingly, one person with a van, no employees, and a turnover below the VAT threshold.

By Sage Vinson · Published 31 July 2026 · Figures last checked 31 July 2026

Key findings

500,485
UK construction businesses that appear in the national estimate but not on the VAT/PAYE business register — 57% of the sector.
75%
of all 5,690,265 UK private sector businesses employ nobody at all — 4,272,535 of them. The one-person business is not a niche; it is the default shape of a British business.
£2,200–£3,300
our estimate of the billable work a solo tradesperson loses each year to chasing late payment, derived from the official 86-hour figure. Method below.

Two counts of the same industry

The two figures are not in conflict. They are measuring different things, and both publishers say so plainly. The ONS bulletin draws on the Inter-Departmental Business Register, which lists businesses registered for VAT and/or PAYE— and notes that DBT publishes the estimate covering everything else. DBT's Business Population Estimates add a modelled figure for the unregistered population, built largely from Labour Force Survey self-employment data.

What nobody publishes is the subtraction. Doing it gives a reasonable estimate of how many construction businesses in Britain are trading below both registration thresholds at once: under the £90,000 VAT threshold, and with no payroll because there is nobody on it.

UK construction businesses: two official counts, 2025
DBT Business Population Estimates885,485

All businesses, registered and unregistered

ONS VAT/PAYE business register~385,000

Registered businesses only. The hatched area is what the register does not see.

~500,485 businesses

57% of UK construction businesses appear in the national estimate but not on the official register. They trade under the £90,000 VAT threshold and run no payroll, because there is nobody on it.

Sources: DBT, Business Population Estimates 2025 (start of 2025); ONS, UK business: activity, size and location 2025 (March 2025). Analysis by SoloDesks. Free to reuse with attribution (CC BY 4.0).

SourceCoverageConstruction businesses
DBT, Business Population Estimates 2025All businesses, registered and unregistered (start of 2025)885,485
ONS, UK business: activity, size and location 2025Registered for VAT and/or PAYE only (March 2025)~385,000
DifferenceTrading below both registration thresholds~500,485

The national picture says the same thing in a different way. 4,272,535 of the UK's 5,690,265 private sector businesses employ nobody — 75% of them. Of 3.2 million sole proprietorships, 3.0 million have no employees beyond the owner. Construction is simply where that pattern is most concentrated, and it is the largest business population of any industry in the country.

What late payment costs a business of one

Research by London Economics for DBT and the Office of the Small Business Commissioner, published in July 2025, found that late payment affects over 1.5 million businesses — 28% — each year. They are owed £26 billion at any one time, an average of £17,000 each. The cost to the economy is almost £11 billion a year, and 14,000 businesses — 38 a day — close because of it.

The figure that changes meaning with company size is the time one. 22% of businesses said they spend staff time chasing payment, averaging 86 hours a year each — 133 million hours across the economy.

For a firm with an office, those hours are an overhead absorbed by somebody whose job it is. For a business of one there is nobody to absorb them. Every hour chasing an invoice is an hour not on the tools, which makes it not an overhead but lost billable capacity — and it should be priced like one.

How we get to £2,200–£3,300

  1. Start with the official figure: 86 hours a year chasing late payment, per affected business (DBT/OSBC, July 2025).
  2. Divide by an 8-hour working day: 86 ÷ 8 ≈ 11 working days.
  3. Multiply by a typical UK trade day rate of £200–300, the same band published on our day rate calculator: £2,200–£3,300.

This is an illustrative cost of lost capacity, not a measured loss. It assumes the chasing hours would otherwise have been billable, which for a sole trader with a full order book is roughly true and for one without work is not. The day-rate band is itself aggregated from third-party UK trade cost guides, not official statistics.

Limitations

The objections a statistician would raise, answered before they are asked.

The two counts are three months apart

Business Population Estimates describe the population at the start of 2025; the ONS register figure is from March 2025. Three months of business formation and closure sit inside the gap. It is nowhere near large enough to explain half a million businesses, but the comparison is not a same-day one and should not be presented as one.

One is a register, the other is an estimate

The ONS figure is an administrative count of businesses registered for VAT or PAYE. The DBT figure adds a modelled estimate of the unregistered population, built largely from Labour Force Survey self-employment data. Modelled numbers carry uncertainty that a register does not. The gap is therefore an estimate of a gap, not a headcount.

This is a deliberate like-for-unlike comparison

Subtracting a register from an estimate would be a mistake if the point were to measure the industry. The point is the opposite: to measure what the register misses. DBT and ONS both say plainly that their coverage differs — this analysis takes them at their word and puts a number on the difference.

“Construction” leaves real trades out

Both sources use SIC Section F, which covers building work but not everything a person would call a trade. Domestic cleaning and much of landscaping sit under other SIC sections entirely. The true number of one-person trade businesses in the UK is therefore larger than the figure here, not smaller.

Sources

Use these figures

This analysis is free to reproduce, in whole or in part, including commercially, under a CC BY 4.0 licence. The one condition is attribution with a link. Journalists and researchers are welcome to email support@solodesks.com for the underlying working.

“Analysis by SoloDesks of DBT Business Population Estimates 2025 and ONS UK business: activity, size and location 2025.”

The underlying government data is published under the Open Government Licence v3.0.

Questions

How many construction businesses are there in the UK?
885,485 at the start of 2025, according to the Department for Business and Trade's Business Population Estimates — the largest number of any single industry. Only around 385,000 of them were registered for VAT or PAYE on the ONS business register in March 2025.
How many UK tradespeople are self-employed with no employees?
Across the whole economy, 4,272,535 of the UK's 5,690,265 private sector businesses employ nobody — 75%. In construction specifically, the gap between the full-coverage estimate and the VAT/PAYE register suggests roughly 500,485 construction businesses operate below the registration thresholds, which in practice means one person with no employees turning over less than £90,000.
Why do the two official figures disagree?
They are counting different things on purpose. The ONS figure comes from the Inter-Departmental Business Register, which lists businesses registered for VAT and/or PAYE. The DBT estimate adds a modelled figure for the unregistered population, drawn largely from Labour Force Survey self-employment data. Neither is wrong; the difference between them is a measure of how much of the economy sits below the registration thresholds.
What does late payment cost a one-person trade business?
The official research puts the time cost at 86 hours a year chasing payment, for the 22% of businesses that spend staff time on it. For a business with staff that is an admin overhead. For a sole trader there is nobody else to absorb it, so those 86 hours — about 11 working days — are hours not on the tools. At typical UK trade day rates of £200–300, that is roughly £2,200–£3,300 of billable capacity a year.

Built for the 57%

SoloDesks is quoting and invoicing software for the one-person trade business this research is about — no per-seat pricing, no office, no team to administer. Quote from the doorstep, invoice the day you finish, and let the chasing happen without you.

Start freeWhy one-person pricing