The hidden costs of doing everything in-house

Key takeaways

The hidden costs of doing everything in-house are the costs that never appear as a line on the profit and loss account: lost focus, rework, delay, fragility and an unmanaged tool stack. In a 12-person UK business they can add up to about £25,000 a year, which is often more than the visible saving from not paying a provider.

• About £25,000 a year: the illustrative hidden cost in a 12-person UK business.
• Five hidden costs: focus, rework, delay, fragility and stack.
• Senior time on routine work is usually the largest single line.
• Score 7 or more out of 10 on the GBL Hidden Cost Audit and in-house is costing you.

What are the hidden costs of doing everything in-house?

A hidden cost is a real cost to the business that no invoice, payslip or budget line records. Doing everything in-house creates five of them: skilled people losing focus to routine work, mistakes that have to be redone, work that waits in a queue, dependence on single individuals, and tools nobody manages. None is visible in the accounts, and all of them reduce profit.

This guide is about those unseen costs. The visible cost of employing someone, such as salary, employer National Insurance and pension, is covered separately, as is the wider comparison between the two operating models.

• What are hidden costs in a business?
• The true cost of an employee in the UK
• In-house vs outsourcing: which model is more cost-effective?

Why do in-house costs stay hidden?

In-house costs stay hidden because salaried time feels free. Once someone is on the payroll, each extra task they pick up adds nothing to this month's outgoings, so nobody prices it. Accounts record what was paid, not what the paid hours produced, and not what they could have produced on better work.

Three habits keep the costs out of sight. Work is costed at salary, not at the loaded cost per worked hour. Senior people absorb gaps quietly, so the gap never shows as a vacancy. And an outside quote is compared with zero, because the internal alternative has never been costed.

• Why businesses keep work in-house when it costs more
• In-house team myths that hide the real cost

What are the five hidden costs?

The GBL Hidden Cost Audit groups the hidden costs of in-house work into five lines: focus, rework, delay, fragility and stack. Each is scored 0 to 2, giving a total out of 10. The five lines cover almost every unseen cost we find when we map who does what in a UK small or medium-sized business.

• Focus: senior or skilled people spending hours on routine work, and switching between tasks.
• Rework: errors, inconsistent output and work done twice because nobody is a specialist.
• Delay: quotes, replies, invoices and projects that wait behind the day job.
• Fragility: one person holding a process, with no cover for holiday, sickness or resignation.
• Stack: software, licences and equipment bought ad hoc, overlapping and unmanaged.

• The hidden cost audit: score your business in an hour

How much does lost focus cost?

Lost focus is usually the largest hidden cost. An owner who spends 8 hours a week on admin, valued at £40 an hour, is carrying about £14,700 a year of routine work. A £45,000 manager costs about £29.98 per worked hour once employer costs are included, so 5 hours a week of their time on data entry is about £6,900 a year.

Switching between tasks adds to it. The American Psychological Association summarises research suggesting that shifting between tasks can cost as much as 40% of someone's productive time. A small team in which everyone covers several functions switches constantly.

• The cost of context switching in a small team
• Wearing too many hats at work: the cost to a small team
• The opportunity cost of doing everything in-house

How much do rework and delay cost?

Rework and delay cost twice: once in staff time and once in lost revenue. Three hours a week spent correcting invoices, orders or records at a loaded £19.81 an hour is about £2,700 a year. Delay is harder to see, because a quote sent late or an enquiry answered the next day simply produces a job that never appears.

A simple way to size delay is to count enquiries that waited more than a working day, estimate how many would have converted, and multiply by the average job value. Two slow enquiries a month, one in three convertible, at £600 a job is £4,800 a year.

• The cost of poor quality in a small business
• Cost of delay: what waiting costs a small business

What do fragility and the tool stack cost?

Fragility costs nothing until someone is off, and then it costs a great deal. The Office for National Statistics reports a UK sickness absence rate of 2.0% in 2024, an average of 4.4 days per worker, and statutory holiday is 28 days for a full-time employee. A process held by one person therefore stops for roughly six weeks a year unless someone else can run it.

The tool stack is the quietest line. Subscriptions bought by different people for the same job, licences for staff who have left and equipment for part-used roles commonly add £100 to £200 a month in a small business, and unmanaged tools also carry security risk.

• The one-person department: risks and hidden costs
• Shadow IT in a small business: risks and fixes

What does a worked example look like?

Take an illustrative 12-person UK services business that does everything itself. Focus: the owner spends 8 hours a week on admin at £40 an hour, about £14,720 a year. Rework: 3 hours a week at £19.81, about £2,730. Delay: two slow enquiries a month, about £4,800. Fragility: two weeks of uncovered absence cleared in overtime, about £1,490. Stack: £120 a month of overlapping software, £1,440.

The total is about £25,000 a year, and none of it appears as a line in the accounts. These are example figures, not benchmarks. The point is the method: price each line, add them up, and compare the total with what it would cost to have the routine work done by a specialist or a managed team.

• Focus: about £14,720 a year.
• Rework: about £2,730 a year.
• Delay: about £4,800 a year.
• Fragility: about £1,490 a year.
• Stack: about £1,440 a year.

How do hidden costs compare with outsourcing?

Hidden in-house costs should be compared with the full cost of the alternative, not with zero. As indicative market ranges, a managed offshore team costs UK businesses around £9–£18 per hour and an onshore provider £20–£35 per hour, usually with supervision and holiday cover included. Eight hours a week at £14 an hour is about £5,800 a year.

Outsourcing has hidden costs of its own: setup, documentation, your review time and contract terms. A fair comparison prices both sides fully. Where the in-house hidden cost is several times the outsourced total, the case is clear; where they are close, keep the work.

• The hidden costs of outsourcing
• In-house vs outsourcing: which model is more cost-effective?

When is doing it in-house the right call?

Doing work in-house is the right call when the work is core to what customers pay for, needs judgement built over years, fills a role fully, or has to happen on site. It is also right when volume is only a few hours a week, because handover and management would cost more than the hidden cost you remove.

The aim is not to outsource everything. It is to stop doing everything, and to choose deliberately which work earns its place inside the business. A low audit score means in-house is working and should be left alone.

• The work is your product or your client relationship.
• The role is fully used, with little idle or switching time.
• Someone must be physically present.
• Volume is too small to justify a handover.

• Core vs non-core activities: what to keep in-house
• When is in-house cheaper than outsourcing?
• When not to outsource

Which functions carry the most hidden cost?

The functions with the most hidden cost are the ones nobody was hired to do. In UK small businesses these are usually customer email and phones, bookkeeping and invoicing, the website, marketing, IT support and reporting. Each is picked up by whoever is nearest, done between other tasks, and never reviewed against a standard.

The pattern is consistent: the work gets done, slowly and unevenly, by someone whose real job is something else. The cost is carried by that real job.

• Doing everything yourself in business: what it costs
• Generalist vs specialist: who should do the work?

How do you find your own hidden costs?

Find your hidden costs with a two-week time log and five questions. Ask everyone, including the owner, to record time against task types. Then score focus, rework, delay, fragility and stack from 0 to 2 each. A total of 0 to 3 means in-house is working, 4 to 6 means it is leaking, and 7 or more means it is costing you heavily.

• Focus: how many senior hours a week go on routine work?
• Rework: how often is work corrected or redone?
• Delay: what is waiting longer than a working day?
• Fragility: which processes stop when one person is off?
• Stack: which tools overlap, or have no owner?

• The hidden cost audit: score your business in an hour
• Run a time audit to find what to outsource
• Activity based costing for small businesses

What does this look like in practice?

A pattern we see in UK professional services firms: the office manager runs invoicing, the website, IT queries and the phones, and a director covers when they are away. Nothing is failing outright, so nothing is reviewed. A two-week log usually shows the director losing most of a day a week to cover and corrections, and invoices going out a week later than they could.

Across our client work, back-office cost per task has fallen by 42% once the process was written down and run by a managed team, and owners have got 31 hours a week back.

• See client work
• BPO Solutions for UK businesses

Hidden costs of in-house work checklist

Work through these steps before deciding what stays inside the business.

• Log two weeks of time by task type, owner included.
• Price senior hours on routine work at the loaded hourly cost.
• Count corrections, re-sends and repeated work each week.
• List everything that waits more than one working day.
• Name every process only one person can run.
• List every subscription, its owner and its monthly cost.
• Score the five lines and total the annual cost.
• Compare the total with a quote for the same written scope.

• How to reduce hidden costs in a business
• Delegate vs outsource: which should you choose?

Next step

Send us your team size, who covers which functions and roughly how many hours they take. In a 30-minute call we will size the five hidden cost lines with you and say plainly which work should stay in-house.