Is a bigger agency safer than an independent?

Partly true. A bigger agency is safer against one specific risk, which is the work stopping because one person is ill, on holiday or leaves, and it can do more at once. It is not safer on everything. People move on in bigger agencies too, you may not get the person who pitched, and the protections that matter most, insurance and data protection, depend on the supplier and the contract, not on how many people work there.

Our interest, stated first. We are an independent agency, so we have an interest in the answer.

This is part of our series on marketing myths, checked, which tests things small businesses are told against what the regulators, the data and the people who run the systems actually publish.

What actually differs

Cover when someone is ill, on holiday or leaves

This is the clearest difference, and it favours the bigger agency.

Everyone is away sometimes. Almost all workers are entitled to "5.6 weeks' paid holiday a year" (GOV.UK, holiday entitlement), and the Office for National Statistics estimates that the average worker lost 4.4 days to sickness or injury in 2025 (ONS, sickness absence in the UK labour market: 2025; these are official statistics in development). Put together, that is around six and a half weeks a year when any one person is not working, if they take their holiday.

In a bigger agency, someone else can usually pick up the work during those weeks. With a smaller supplier, the work may wait, unless there is an arrangement for someone else to cover it. For a website build that is an inconvenience. For an ad account spending thousands a week, or a launch with a fixed date, it can be expensive.

Continuity of people

Here the bigger agency's advantage is smaller than it looks. Cover is not the same as continuity: a bigger agency can replace a person, but people also leave it. The Institute of Practitioners in Advertising (IPA), which surveys its member agencies every year, reported that across them "Overall turnover rose to 24.8%" in the twelve months to 1 September 2025, and that "Overall staff retention declined to 68.6%" (IPA Agency Census 2025, published 11 February 2026). Its members are advertising, media and creative agencies, not the smaller firms most small businesses hire, so treat the figure as an indication, not a measure of every agency. It does mean the person who knows your account in January may not be there in December.

A smaller independent often offers the opposite trade: more continuity in who does your work, and less cover if that person is unavailable. Which you actually get depends on the supplier, not the label, so ask.

Capacity

A bigger agency can run several things at once: search ads, social ads, content and design in the same month, with more people to absorb a busy period. An independent can only do so much, and should tell you how many clients it works with at once. If you need a lot produced every month across several channels, this is a real reason to go bigger.

Range of specialists

A bigger agency usually has more specialists in-house. An independent covers fewer disciplines itself and brings in others for the rest. Neither is wrong, but with an independent you should ask who else will work on your account, and whether they are covered by the same contract.

Insurance

This is where size tells you least. Employers must have employers' liability insurance "to cover you for at least £5 million" as soon as they employ someone (GOV.UK, employers' liability insurance), so a bigger agency will have it. But that insurance pays compensation if an employee is injured or made ill by their work. It does not cover you.

What covers a client's loss from negligent work is professional indemnity insurance. Some regulated professions must hold it: healthcare professionals, for example, must have an indemnity arrangement as a condition of registration (Health Care and Associated Professions (Indemnity Arrangements) Order 2014). We found no law or regulator that requires a marketing agency to hold it. So whether your supplier has it, and for how much, is a question to ask whatever its size.

Data protection

Size makes no difference to the law here either. If a supplier handles personal data for you, such as customer lists, form submissions or analytics, it acts as your processor, and the same rules apply to a small supplier and a large agency. The ICO's guidance explains that under Article 28(1) of the UK GDPR a controller "must only use a processor that can provide “sufficient guarantees” (in particular in terms of its expert knowledge, resources and reliability)" (ICO, responsibilities and liabilities for controllers using a processor). Resources is part of that test, so it is a fair question to put to a small supplier, and a fair one to put to a large supplier about who will actually handle your data.

Account management

A bigger agency usually gives you an account manager between you and the people doing the work, with processes and reporting built around that. An independent usually means talking to the person doing the work. We found no evidence that either produces better results; it is a question of which you would rather have. We set out the trade-offs in independent, founder-led agencies and agency or freelance marketer.

Cost structure

A bigger agency's price has to cover more people and more overhead: account management, premises, new business, and the time of people between you and the work. An independent's price covers fewer of those. That does not make an independent cheaper for the same result, and we found no reliable public data comparing agency prices or outcomes by size. Compare what each will do, who will do it, and the total cost, not the day rate.

When a bigger agency is the right choice

Be specific about which of these apply to you. If any does, a bigger agency is likely the safer choice, and we would say so to a client.

• You need several disciplines running at the same time, every month, such as paid search, paid social, content and design, at a volume one person could not produce.
• The work cannot pause. Large ad budgets where a week unmanaged would cost real money, campaigns that need watching seven days a week, or launches and seasonal peaks with fixed dates.
• Your procurement requires it. If your organisation's rules require minimum insurance levels, security certifications, audited accounts or a financial standing that a small supplier may not have, a bigger agency may be the only kind that qualifies.
• Nobody on your side can coordinate. If you would otherwise hire several specialists and have no one with time to brief and manage them, one agency coordinating the work is worth paying for.
• You need cover outside working hours, or across several markets and languages.

When an independent is fine, or better

• The work can be described as a project, with a start, an end and a defined result.
• You want senior judgement on your account, from the person you met.
• A pause of a week or two while someone is away would not cost you much.
• The supplier can tell you exactly what happens if they are unavailable.

What to ask either

The same questions protect you whatever the size of the supplier, and they apply to us too: ask us every one of them. The full list is in questions to ask a marketing agency.

• Who will do the work, and will I meet them before I sign?
• What happens when that person is ill, on holiday or leaves?
• How many clients do you work with at once?
• Do you hold professional indemnity insurance, at what limit, and can I see the certificate?
• Will you sign a data processing agreement, and who will handle our data?
• Who else works on our account, and are they covered by this contract?
• Are every account, file and login in our name? See who owns your marketing accounts.
• What is the notice period, and what do we get at handover?

If you want help deciding what kind of support you need before choosing anyone, our 90-day marketing plan is a fixed £2,500: a budget split channel by channel and a plan with the jobs in order.

Where the evidence is thin

• Outcomes by agency size. We found no published data comparing results for clients of small and large agencies.
• Staff turnover. The IPA's figures cover its member agencies: advertising, media and creative agencies. We found no equivalent figure for smaller agencies or for independents.
• Supplier failure. We found no official data on how often marketing agencies of different sizes close, so we make no claim about which is more likely to stop trading.
• Insurance. We found no law or regulator requiring marketing agencies to hold professional indemnity insurance; we cannot rule out that one applies to a particular specialism.

The verdict

Partly true. A bigger agency is safer against one real risk, the work stopping because one person is away, and it is built for volume. If the work cannot pause, or you need several disciplines at once, that matters and a bigger agency is the better choice. It is not safer on everything: people leave bigger agencies too, you may not get the person who pitched, and insurance and data protection depend on the supplier and the contract, not the headcount. Ask the same questions of both, and choose on the answers.