Multiple jobs are
measurable.
Conflicting commitments are harder to see.
Multiple jobholding is no longer a marginal feature
of the labour market. Official statistics and international workforce surveys show that millions of
people work across more than one role, employer or source of income.
Most research, however,
measures the number of jobs - not whether those commitments overlap, whether they have been
disclosed, or whether they create contractual, operational or compliance risks.
Proteco360
examines the visibility gap between what labour-market data can tell us and what individual
organizations can see.
Market Statistics
of surveyed workers globally reported holding two or more jobs.
Multiple jobholding is not limited to a small group of exceptional cases. It is present across regions, industries and forms of work.
In the 2024 ADP Global Workforce Survey, 18% of respondents reported having two jobs and a further 5% reported three or more.
The survey collected responses from nearly 38,000 workers across 34 markets on six continents.
Source: ADP Research - People at Work 2025: A Global Workforce View.
people in the United States held more than one job in 2025.
Even conservative official labour statistics identify millions of active multiple jobholders in a single national market.
According to the U.S. Bureau of Labor Statistics, multiple jobholders represented 5.4% of all employed people in 2025, compared with 5.2% in 2024.
Among workers aged 25-54, the rate reached 5.7%.
Source: U.S. Bureau of Labor Statistics - Multiple jobholders by selected characteristics...
UK workers were recorded as having a second job in 2025.
The number of people combining jobs remains substantial even in official datasets that depend on workers declaring secondary employment.
The Office for National Statistics series shows an increase from approximately 1.19 million workers in 2023 to 1.25 million in 2024 and 1.31 million in 2025.
Source: UK Office for National Statistics - Workers with second jobs.
growth in the number of London workers with more than one job over ten years.
Analysis published by the Greater London Authority estimated that the number of Londoners with multiple jobs increased from 147,000 in 2014 to 201,000 in 2024.
Their share of the employed population increased from 3.6% to 4.3%.
Source: Greater London Authority - Second job holders in London.
of employed U.S. adults said they were likely to seek a second job or side hustle within the following year.
The financial and behavioural drivers behind additional employment are likely to remain strong.
The 2025 Workforce Monitor survey, conducted by The Harris Poll for the American Staffing Association, found particularly high declared interest among Millennials, Generation Z and employed parents with minor children.
This figure measures intention, not current multiple employment.
Source: American Staffing Association and The Harris Poll - Economic Anxiety...
of respondents with two jobs said they were living paycheck to paycheck.
Multiple employment is often a continuing response to financial pressure, rather than a temporary exception.
The share increased to 61% among respondents with three or more jobs. By comparison, 54% of single-job holders reported living paycheck to paycheck.
Additional work therefore does not necessarily remove the underlying financial pressure that encouraged it.
Understanding overemployment
Multiple employment is not automatically a conflict. Undisclosed overlap can be.
People take additional jobs for many legitimate reasons. They may need additional income, want to build experience, develop new skills, create greater financial security or operate a portfolio career.
In many situations, those arrangements are known, permitted and completed outside the hours committed to another organization.
The risk changes when two or more engagements compete for the same contractual availability.
For the purpose of Proteco360 research, we use the term overemployment to describe situations in which a person simultaneously holds multiple availability-based roles and the obligations attached to those roles materially overlap.
The defining issue is therefore not simply the existence of another job. It is the potential conflict between commitments.
Why it is difficult to measure
Traditional labour statistics can count jobs. They cannot reliably identify conflicting commitments.
Official statistics usually determine whether a respondent has more than one job. They do not normally establish:
- whether the additional role was disclosed,
- whether both organizations purchased the same working availability,
- whether working schedules overlap,
- whether the organizations are competitors,
- whether contractual restrictions apply,
- or whether the arrangement creates an actual delivery or security risk.
This means that the prevalence of hidden, simultaneous full-time employment cannot be responsibly derived from general multiple-jobholding statistics.
Claims such as "23% of employees are secretly overemployed" would therefore go beyond the available evidence. ADP measures declared numbers of jobs, while BLS counts people who report multiple employment; neither dataset establishes hidden contractual overlap.
Why organizations cannot see the complete picture
Every organization sees its own contract. No organization sees the entire ecosystem.
An employer may know the role, schedule and availability declared within its own systems. A staffing vendor may understand the assignments it manages. Another agency or client holds a different part of the same picture.
Without a neutral verification mechanism, potentially conflicting commitments remain distributed across separate organizations and databases.
Solving that problem through direct exchange of identifiable workforce records would introduce additional privacy, security and governance concerns.
Proteco360 is designed around a different model: limited-scope verification that identifies relevant overlap patterns without building a conventional centralized HR database.
Potential business impact
Depending on the role, contract and industry, conflicting engagements may create risk in several areas.
Availability and delivery
Two organizations may rely on the same person to remain available, responsive or productive during overlapping periods.
Capacity and billing integrity
A contractor or supplier may represent the same workforce capacity as fully allocated to more than one client.
Confidentiality and information security
Concurrent access to systems, documentation or commercially sensitive information may increase exposure where organizations operate in related markets.
Conflicts of interest
Assignments for competing organizations may be inconsistent with contractual, professional or internal-policy obligations.
Health and sustainable workload
Where multiple commitments produce long working hours and insufficient recovery, the arrangement may contribute to fatigue, lower concentration and health or safety risks.
Compliance and auditability
Organizations may be unable to demonstrate that availability, allocation or conflict-of-interest requirements were meaningfully verified.