Shift, session and private income
We separate NHS and agency shift pay, pharmacy and test-clinic sessions and private fees, so every stream is reconciled and taxed correctly across your whole year.
Agency and trust shifts, pharmacy days, test clinics and private sessions, your remittances and your tax return handled by a locum accountant who knows the rota.
You trained to treat patients, not to reconcile three agency remittances and a stack of forms. As a specialist accountant for locum doctors, pharmacists and optometrists, we take Self Assessment, your expenses and your year-end off your plate. A freelance GP doing surgery sessions, a community pharmacist booked on the bank, an optometrist covering three practices this month: we know how locum income is paid, how IR35, the off-payroll working rules, bites on agency and trust work, and we keep HMRC happy. Book a call with a specialist who understands the work, on one fixed monthly fee.

Most accountants have never seen an NHS Pension locum form, a pharmacist or optician registration fee claimed correctly, or an inside-IR35 determination from a trust. They treat your locum work like any other freelance gig, and that is exactly where it goes wrong.
IR35 waved through unchecked. Pensionable sessions left unrecorded for doctors. Indemnity and professional body fees missed. Payments on account that arrive as a shock. So you overpay, or you lose pension you earned, and you are never quite sure where.
A specialist locum accountant works the other way round. We know how shift and session income is paid, where the allowable costs hide, and how the paperwork fits your profession. We do not just record your numbers. We make them make sense.
We separate NHS and agency shift pay, pharmacy and test-clinic sessions and private fees, so every stream is reconciled and taxed correctly across your whole year.
Most freelance locums start self-employed. We handle your Self Assessment, expenses and payments on account, or run your company if incorporating wins.
For doctors and GPs, we complete your locum pension forms and reconcile pensionable pay, so your contributions are recorded and nothing pensionable is quietly lost.
Your registration and indemnity, professional body membership, CPD and travel between sites, all captured, including the profession-specific costs a generalist tends to miss.
We assess each trust and agency engagement for off-payroll status and keep the written evidence, so your position holds up if HMRC ever asks.
Your tax return and accounts filed on time, with the bill and your payments on account flagged early, so January never catches you out.
Locum work is not one job. A freelance GP running surgery sessions, a doctor covering trust shifts through an agency, a pharmacist picking up dispensary days and an optometrist covering test clinics all get paid differently, and all get taxed differently. We act for every one of them, and the detail is exactly where a generic accountant slips. Each profession has its own section below, so you only read what applies to you. Whichever you are, your locum doctor accountant should know the difference.
Same fixed monthly fee, the same specialist accountant for locums, whichever kind you are.
IR35, the off-payroll working rules, decides whether HMRC sees a locum engagement as genuine self-employment or as employment dressed up through a company. It is assessed for each engagement on the facts, not a label you choose once and keep. As your locum accountant, we make that call with you, engagement by engagement.
Since the off-payroll rules moved the decision onto the engager, many public-sector and agency engagements have been determined inside IR35, whether you are a doctor on the bank, a pharmacist booked through an agency or an optometrist on a locum contract. When that happens, the agency or trust deducts tax and National Insurance at source, much like a normal payslip, before you ever see the money. Private and direct work with smaller employers can be a different story, where the determination still rests on the facts of the engagement.
Get this wrong and you either pay tax twice or carry a status you cannot defend. We read each contract, record the status determination, and reconcile any tax taken at source against your Self Assessment, so nothing is double-counted and nothing is missed. This is bread-and-butter for a locum doctor IR35 accountant and guesswork for a generalist.
First, who this is for: doctors and GPs. Pharmacists and optometrists generally cannot pension locum earnings in the NHS scheme, so if that is you, skip ahead to your own section below.
The NHS Pension is one of the best parts of locum life, and one of the easiest to fumble. Only NHS-pensionable work counts, and it has to be processed correctly, with the right forms, for the contribution to land on your record. A specialist accountant for locum doctors keeps it from slipping.
For freelance GPs in particular, pensioning a session is time-limited: the locum forms confirming your pay have to reach the right place within a set window, or that pensionable contribution is gone for good. Miss a run of them and you quietly lose years of pension growth you actually earned.
There is also a structure trade-off most accountants skip. You cannot pension income invoiced through a limited company, so the route that saves tax can cost you employer pension contributions. This is where an accountant for gp locum work earns the fee: we track every session, file your forms on time, and keep your bookkeeping, your tax return and your pension record telling the same story.
Your tax bill is not your day rate times a percentage. It is worked out on your profit, what is left after every legitimate cost, and locum medical work carries plenty. As your locum doctor accountant, we make sure each one is claimed before the tax is worked out.
Courses that maintain your existing skills are usually allowable; those that lead to an entirely new qualification often are not, and that line catches doctors out. We keep a locum-specific expense checklist and get your VAT position right, though most clinical work you provide is VAT-exempt and does not count towards the registration threshold. A good accountant for locums keeps this checklist for you.
A community pharmacist booked on the bank, or a hospital pharmacist picking up locum shifts, is taxed on profit, not on the day rate. As a locum pharmacist accountant, we make sure every cost that belongs to your work is claimed before the tax is worked out.
Your registration with the GPhC (General Pharmaceutical Council) and membership of the RPS (Royal Pharmaceutical Society) are allowable, along with the day-to-day costs of covering different pharmacies.
You will not have an NHS Pension locum form to file, because locum pharmacy work is not pensioned into the NHS scheme the way freelance GP sessions can be. That is one less deadline, and a specialist accountant for locum pharmacist work keeps your Self Assessment and bookkeeping reflecting your costs correctly.
An optometrist covering three practices this month, or a dispensing optician on locum sessions, faces the same question as every locum: what is left after costs, and what is the tax on that. As a locum opticians accountant, we claim the fees and kit your work depends on.
Your registration with the GOC (General Optical Council) is allowable, as is membership of the AOP (Association of Optometrists), the College of Optometrists or, for dispensing opticians, ABDO (Association of British Dispensing Opticians).
Locum optical work is not pensioned into the NHS scheme, so there is no locum pension form for you to chase. We handle the VAT question carefully, because the clinical services you personally provide are usually exempt while some retail or non-clinical work is not.
Most locums start as a sole trader. You pay Income Tax and National Insurance through Self Assessment, usually with payments on account, and the admin is light.
As private and agency income grows, a limited company can keep more in your pocket. You pay Corporation Tax on profits, then take a salary and dividends. But for doctors, company income cannot be pensioned into the NHS scheme, and inside-IR35 shifts blunt the benefit, so the saving is rarely as clean as it looks.
A company also means more obligations: annual accounts at Companies House and tighter monthly accounting. It is not automatically better, and for many locums it is not worth it.
The right answer depends on your shift mix, your private income and how much you value the pension. As your locum doctors accountant, we model whether an ltd company, a limited company, beats staying a sole trader on your real numbers, and tell you which leaves you better off.
Take an agency locum shift and you are often handed one option: work through an umbrella company. An umbrella is a business that employs you, takes your pay from the agency and runs it through PAYE before passing it on. It is simple, and for genuinely inside-IR35 work it can be the right call. But it is rarely the only option, and it is rarely explained.
The catch is cost. An umbrella charges a weekly or monthly margin, and the employment costs, employer National Insurance and the Apprenticeship Levy, are usually taken from your assignment rate before you are paid. So the headline day rate is not what lands in your account, and across a year of shifts that gap adds up.
A limited company can keep more of your income where the work genuinely sits outside IR35, but for doctors company income cannot be pensioned into the NHS scheme, and inside-IR35 trust shifts blunt the saving, so it is not a default win. For most locums juggling shifts, sessions and private work the honest answer is a blend, and we work out which pounds belong in which structure rather than forcing everything through one route. This is exactly the sum a locum doctor accountant should do for you.
We read the assignment, check the real IR35 position, and tell you whether an umbrella, sole trader status or a limited company leaves you better off. Often it is not the one the agency suggested.
The first big self-employed tax bill is a double hit. Alongside the tax you owe, HMRC asks for payments on account, advance instalments toward next year, which can land as a much larger figure than locums expect.
It catches people in their first or second year especially, when income has jumped but the cash has already been spent. We forecast the whole bill from day one and tell you what to set aside each month. Getting ahead of that first bill is a big part of what a locum accountant is for.
That way your 31 January never blindsides you, and we flag early if your income drops enough to reduce the instalments rather than overpay.
Most self-employed locums pay between £129 and £250 a month, whether you are a doctor, a pharmacist or an optometrist. For those running a company with several income streams it depends on the volume of work.
No hourly rates. No surprise bills. One fixed fee, a named, qualified accountant who understands locum income, and a 30-day money-back guarantee.
Startups and small companies that need essential compliance and year-end support without VAT or payroll.
Growing businesses that need complete accounting services, VAT return management, and payroll handling.
Established businesses that want strategic mentoring, business planning, and a part-time finance director driving growth.
Starting with us, or moving from another accountant mid-year, is meant to be the easy part. Most locums are set up in a few days without lifting much more than a phone.
Switching part-way through the year is fine. We slot in around your tax year and, for doctors, your PCSE (Primary Care Support England) pension deadlines, so nothing pensionable is dropped in the handover.
Variable locum income is one of the main reasons strong earners get turned down for a mortgage. Lenders want clean, consistent evidence, and a locum pulling pay from NHS or agency shifts, pharmacy or test-clinic sessions and the odd private booking can look complicated on paper even when the earnings are healthy.
We produce what lenders and brokers actually ask for: your SA302 tax calculations and the matching tax year overviews, usually across the last two or three years, plus an accountant’s certificate confirming your income and that you are a client of a CIMA-regulated firm. Where your income has grown, we present the trend clearly instead of leaving an underwriter to guess.
The result is a set of figures a lender can accept without a drawn-out back-and-forth, produced quickly when a mortgage offer is time-sensitive. It is the unglamorous paperwork that decides whether a purchase completes, and it is part of your fee, not billed as an extra. Your accountant for locums produces it on request.
It depends on your shift mix. A limited company can be tax-efficient at higher profits, but you cannot pension company income in the NHS Pension Scheme, and public-sector trust shifts are frequently caught by IR35, which removes most of the advantage. Many GP locums stay self-employed precisely to keep building NHS pension. We model both on your real figures before you decide. A specialist locum doctor accountant will not push you into a company just to charge a bigger fee.
Yes, if you do freelance GP locum work for a practice or ICB on a self-employed basis and aren't engaged through an agency. You complete Locum Form A and Form B (or SOLO forms for ICB work), and only 90% of your earnings are pensionable, the other 10% is a fixed expenses allowance. Crucially, forms must reach PCSE within 10 weeks of the work or that period can't be pensioned.
The Type 2 Medical Practitioner self-assessment confirms your tiered NHS pension contributions for salaried or solo GP sessions. If you are solely a freelance locum you generally don't need it, your Locum A and B forms cover you. If you mix salaried and locum work, you do. We confirm which applies and complete it before the annual deadline.
GMC registration, medical indemnity (MDU, MPS or MDDUS), BMA and Royal College subscriptions, exam and CPD course fees, medical equipment, professional journals, business mileage between sites, and a reasonable share of phone and home-admin costs. We make sure each is claimed correctly, generalist accountants often miss indemnity and CPD, which is where a specialist accountant for locum doctors pays for itself.
Self-employed locums pay through payments on account: your first Self Assessment bill includes the tax owed plus a 50% advance payment towards next year, then another 50% in July, so the initial demand can feel like 150% of the tax. We forecast it from your first invoices and tell you exactly what to set aside, so it's never a shock. Forecasting that bill early is a core job for your locum accountant.
Usually not. Most medical services provided by a registered doctor for the protection of health are VAT-exempt, so locum clinical income typically doesn't count towards the £90,000 VAT registration threshold. Some non-clinical work (certain medico-legal reports or expert witness work) can be standard-rated, we check the mix and advise. Your accountant for locums confirms the VAT position before it becomes a problem.
Fixed monthly pricing at £129, £250 or £499 depending on whether you're self-employed or running a limited company, with a named qualified accountant, replies within 72 hours, a 30-day money-back guarantee and rolling monthly terms. We work in Xero, QuickBooks, FreeAgent or Sage. You get a named accountant for locum doctors, not a call centre.
The annual allowance is the most your pension can grow in a tax year with tax relief, currently £60,000. NHS Pension growth counts towards it, and it is measured by a growth formula rather than the contributions you pay, so a busy year of pensionable locum sessions can use more of it than you would expect. For higher earners the allowance also tapers: once your adjusted income passes £260,000 it reduces by £1 for every £2 above, down to a minimum of £10,000. Go over the allowance and there is a tax charge, which can often be met from the pension itself through Scheme Pays rather than your own pocket. We calculate your pension input each year, flag a likely breach before it happens, and help you weigh whether to keep pensioning or pause.
Usually yes, for travel between workplaces. If you are genuinely itinerant, moving between different trusts, surgeries or pharmacies rather than commuting to one regular base, the mileage between those sites is normally an allowable business cost. You can claim the HMRC approved mileage rate, 55p a mile for the first 10,000 business miles in 2026/27 and 25p a mile after that, or your actual running costs if you work through a company. The grey area is ordinary commuting to a single fixed workplace, which is not claimable, and that line catches locums out. We look at your real travel pattern, claim what genuinely qualifies, and keep the records to back it.
Yes. We act for locum pharmacists, locum optometrists and dispensing opticians alongside GP and hospital locums. The core work is the same: separating multiple engagements and remittances, claiming your professional fees, indemnity and mileage in full, getting the sole trader versus limited company decision right, and filing an accurate Self Assessment. The sector detail differs, a pharmacist's mix of dispensary shifts or an optometrist's sessional test clinics, and that is exactly the detail a generic accountant tends to flatten. You get a named accountant who understands how your profession is actually paid.
Less than the headline, and how much less depends on structure. A self-employed locum keeps the day rate minus allowable expenses, then pays Income Tax and National Insurance on the profit through Self Assessment. Inside-IR35 agency shifts have tax and National Insurance removed at source before you are paid, and an umbrella also takes its margin and the employment costs. A limited company can improve take-home on outside-IR35 income but adds running costs and gives up NHS pensionable pay. There is no single percentage that fits every locum, which is why we model your real shift mix and show you the take-home under each option before you commit, rather than quoting a number that does not survive contact with your actual work. Modelling that honestly is the real job of an accountant for locums.
You pay Income Tax and National Insurance on your profit, not your day rate, so what you can claim matters. Allowable costs for a locum pharmacist usually include GPhC (General Pharmaceutical Council) registration, RPS (Royal Pharmaceutical Society) membership, indemnity cover, CPD and revalidation, and mileage between the pharmacies you cover. Locum pharmacy work is not pensioned into the NHS scheme the way freelance GP sessions can be, so there is no locum pension form to file. We keep a pharmacist-specific checklist so nothing is missed.
The main allowable costs are your GOC (General Optical Council) registration, membership of the AOP (Association of Optometrists), the College of Optometrists or ABDO (Association of British Dispensing Opticians), professional indemnity, CPD, and the test equipment and consumables you buy yourself, plus travel between the practices you cover. The clinical services you personally provide are usually VAT-exempt, though some retail or non-clinical work can be standard-rated, so we check your mix. Locum optical work is not pensioned into the NHS scheme.
It depends on the engagement, not on what you call yourself. Many locums are genuinely self-employed and file a Self Assessment tax return, but a specific shift can be inside IR35, the off-payroll working rules, which means tax and National Insurance are taken at source. For public-sector engagers such as an NHS trust, and for larger private ones, the status determination is the engager's to make, not yours. We read each engagement, keep the evidence, and reconcile anything taxed at source so you are not taxed twice. A locum doctor accountant keeps that evidence for every engagement you take.
It will, in stages. Making Tax Digital for Income Tax (MTD) means keeping digital records and sending HMRC quarterly updates instead of one annual return. It starts from 6 April 2026 for people with qualifying income over £50,000, from 6 April 2027 for income over £30,000, and from 6 April 2028 for income over £20,000. If your locum income is heading towards those levels we get your bookkeeping onto software early, so the switch is quiet rather than a scramble.
Plain-English explainers, kept current with the latest HMRC rules.
Zmartly Ltd · 12 Hammersmith Grove, London W6 7AP · 020 8175 5145 · [email protected]
CIMA-regulated. Qualified accountants (ACMA, CGMA, ACCA, FCCA).