In-House Payroll vs Outsourced Payroll for a Domiciliary Care Agency: Which Costs Less?

The short answer: in-house or outsourced payroll

Outsource it, until you are big enough that a full-time payroll person is genuinely busy every day. For a domiciliary care agency under roughly 100 carers, an in-house payroll administrator costs far more than outsourcing the same work, and it puts your entire wage run on one person's shoulders. The all-in cost of that hire lands close to £37,700 a year in 2026/27. A specialist doing the same payroll, plus the care-specific compliance, starts from £299 a month.

That is the cost answer. There is a second answer that matters more, and it is about risk. Home care payroll is not the same as paying a shop team a flat weekly wage. You are paying variable hours, travel time between calls, sleep-ins and waking nights, often weekly, across dozens of carers, and every one of those has a National Minimum Wage trap sitting under it. Get the arithmetic wrong and the bill is not a one-off. HMRC can go back six years and charge a penalty of up to 200 percent of the arrears, capped at £20,000 per worker, and name you publicly. So the honest comparison is not just "which is cheaper", it is "which route actually keeps me compliant".

This guide walks the real numbers on both sides for the 2026/27 tax year, then the operational realities that decide which one is safe. If you want the specialist context first, our healthcare and social care accountants page sets out how we support home care agencies, and our payroll and PAYE service covers the mechanics of running a care payroll properly.

What an in-house payroll administrator really costs

A £30,000 salary is not a £30,000 cost. Once you add the employer's on-costs, the true annual figure for a domiciliary payroll administrator reaches close to £37,700, and the headline wage is only about 80 percent of it. A competent payroll administrator who can handle care payroll sits around £30,000 in 2026/27 nationally, and London adds a premium, so £30,000 is a conservative starting point rather than a generous one.

Here is where the rest of the money goes. Employer secondary Class 1 National Insurance is charged at 15 percent on earnings above the £5,000 secondary threshold, so on a £30,000 salary that is £3,750. Auto-enrolment pension adds a further 3 percent employer contribution on qualifying earnings, roughly £713 on that salary. Then come the costs no one budgets for at the interview: a payroll software licence that can cope with variable hours and multiple pay frequencies, training so the person actually understands travel-time rules, and cover for the weeks they are on holiday or off sick. Together those run to around £3,200 a year for a single-person payroll function.

One caveat that bites care agencies specifically. The £10,500 Employment Allowance would normally knock £5,000 off that employer NIC bill, but agencies that earn more than half their income from local authority or NHS contracts can lose the allowance under the public-authority restriction. It is worth checking in writing before you assume it applies. We flag this because a lot of home care agencies claim it wrongly and have to pay it back.

What outsourcing the same payroll costs

Outsourcing the identical payroll costs a domiciliary agency a fraction of an in-house salary, from around £299 a month for a specialist bundle. That single figure buys the payroll run, the Real Time Information filing, the pension submissions and the care-specific compliance, with no employer National Insurance, no pension on top, no software licence and no gap when someone is off sick.

There are two outsourced routes and they are not the same thing. A bare payroll bureau processes the hours you send it and files the return. Priced per payslip at roughly £4 to £12, it can look cheap, but home care agencies often pay weekly or fortnightly, which multiplies the payslip count and pushes a 30-carer agency past £4,000 a year for processing alone. It also does exactly what you tell it and nothing more, so the travel-time and sleep-in checks are still your problem. A care specialist charges a fixed monthly fee that already includes those checks. For an agency of up to 30 carers that is from £299 a month, from £549 a month for 30 to 100 carers, and from £999 a month above that.

The chart below puts the three routes on one axis. It is not that outsourcing shaves a little off. For an agency that does not have the daily volume to fill a full-time seat, it is a different order of magnitude. For the detail on what the wage bill itself looks like at scale, our guide on how much payroll costs for a domiciliary care agency with 50 carers breaks the numbers down carer by carer.

Why domiciliary payroll is not ordinary payroll

Home care payroll sits on top of rules a generalist rarely handles, and each one is a place where a cheap payroll route quietly becomes an expensive one. This is the real reason cost is not the only test. Three areas decide whether your wage run is safe.

Travel time and the minimum wage average

Paying only for contact time is the classic mistake. Time a carer spends travelling between calls counts as working time for National Minimum Wage, so it must be paid, and it must not pull the carer's average pay below £12.71 an hour for 2026/27. The home-to-first-call and last-call-to-home commute is excluded, but everything in between is in. Because pay is averaged across a reference period of up to a month, a rota packed with short visits and long gaps can look fine on the payslip and still breach the floor. It is enforced under HMRC's National Minimum Wage guidance, and from April 2026 enforcement moves to the new Fair Work Agency. Our deeper note on the minimum wage averaging trap for domiciliary carers shows exactly where agencies get caught.

Sleep-ins, waking nights and status

Night cover is the second trap. Following the Supreme Court ruling in Royal Mencap Society v Tomlinson-Blake, a worker on a genuine sleep-in is entitled to the minimum wage only for time spent awake and working, while a waking night is paid in full. Get the classification wrong in either direction and you either overpay or underpay, and underpayment is the one that carries the penalty. There is also the self-employed-versus-employed question, because putting carers on a self-employed footing to dodge payroll rarely survives an HMRC status check.

Rota-to-payroll reconciliation and the welfare VAT position

The hours in your rostering system are almost never the hours that reach payroll. Cancelled calls, doubled-up visits, extra travel and last-minute cover all move the number, and the gap between rostered, paid and invoiced hours is where margin leaks. Reconciling those three is a care skill, not a generic one. Sitting behind it is VAT: care from a Care Quality Commission registered provider is usually exempt, which sounds helpful until you realise it makes the VAT on your costs irrecoverable and turns any staff-supply or introductory income into a standard-rated question. A payroll clerk focused on data entry will not see either issue coming.

When an in-house hire does make sense

An in-house payroll administrator starts to earn its keep once the agency is large enough to keep that person busy every working day. The tipping point is usually somewhere past 100 carers, or a group running several registered branches, where the daily churn of new starters, leavers, rota changes, mileage claims and pay queries genuinely fills a full-time role. Below that, you are paying a full salary for part-time work, and you are carrying a real operational risk: when your one payroll person is on holiday or off sick in the week of a pay run, the carers still need paying on time.

Even past that threshold, most growing agencies land on a hybrid. They keep an in-house coordinator who owns the rota and the hours data, then hand the actual payroll run, the compliance checks and the year-end work to a specialist. That way the person who knows the carers manages the inputs, and the technical minimum-wage and VAT risk sits with a firm that does it every day. It also means the wage run does not stop the moment one person is away.

The scale question and the structure question are linked, because a larger agency is often also weighing up whether to incorporate or how to fund growth. If that is you, our comparison of sole trader versus limited company for a domiciliary care provider covers where the maths tips.

What this means for you: what to do next

The decision is mostly a question of scale and risk, and both are quick to sense-check. Here is the practical sequence.

1. Count your carers and your pay frequency. Under 100 carers, and especially if you pay weekly or fortnightly, outsourcing almost always wins on cost. Weekly pay multiplies a bureau's per-payslip charge, so a fixed monthly specialist fee often works out cheaper as well as safer.
2. Load the true cost of any hire. Do not compare a salary against a monthly fee. Add the 15 percent employer National Insurance, the 3 percent pension, the software and the cover, then check whether the Employment Allowance is even available to you given your funding mix.
3. Audit your travel-time pay now. Pull one pay run and check the lowest-paid carer's average against £12.71 across the reference period, including travel between calls. If it is close, you have a live risk to fix before HMRC finds it.
4. Separate inputs from processing. Whoever owns your rota can own the hours. The payroll run, the minimum-wage checks and the year-end do not have to sit in the same place.
5. Get the sleep-in classification in writing. If you run night cover, confirm which shifts are genuine sleep-ins and which are waking nights, and price both correctly.

None of this is exotic. It is arithmetic and sequencing. Done properly it saves you a salary you do not yet need and keeps you clear of a penalty that can reach 200 percent of the arrears. You can check your agency's position in a free call with LOYALS.