Who we helpIndustry guide

The contractor accountant who gets IR35 right.

IR35, dividends and year-end accounts handled by a contractor accountant who knows how your day rate really works.

You win the contracts, we handle the rest. As a specialist contractor accountant for limited company contractors, we take IR35, payroll, VAT and your year-end accounts off your plate. Inside IR35, outside it, or weighing up an umbrella? We know the difference, structure your salary and dividends sensibly, and keep HMRC off your back. Book a call with a limited company contractor accountant who actually understands the day-rate world, on one fixed monthly fee.

  • 4.9 Google · 63 reviews
  • ACCA-qualified
  • 30-day money-back
Calendar and planner on a desk
The problem

Why a Generic Accountant Often Gets It Wrong

Most accountants are great with shops and trades, but contracting is its own world. Your income arrives as a day rate through a limited company, and the tax planning that follows looks nothing like a normal small business.

Get IR35 wrong, draw dividends the lazy way, or miss a legitimate expense, and you quietly hand HMRC money you never needed to. You rarely find out until it is too late to fix.

A specialist contractor accountant works the other way round. We know the day-rate model, the off-payroll rules and the salary-and-dividend split, so we plan ahead instead of just filing last year. We do not only record your numbers. We improve them.

Tailored services

What We Handle, So You Don't Have To

  • 01

    IR35 and off-payroll reviews

    We assess each contract and how you actually work, so you know whether you are inside or outside IR35 and what it means for your take-home.

  • 02

    Limited company and PSC accounts

    Full year-end accounts, Corporation Tax and the Confirmation Statement for your personal service company, filed on time.

  • 03

    Salary and dividends

    We set a sensible director salary and handle the dividend paperwork, so you draw your profits the efficient way and stay compliant.

  • 04

    VAT and the Flat Rate Scheme

    Registration, quarterly returns and a check on whether the Flat Rate Scheme or standard VAT leaves you better off.

  • 05

    Contractor expenses

    Home office, equipment, travel between sites, training and more, all claimed correctly against your company.

  • 06

    Switching mid-contract

    Moving from an umbrella or another accountant? We handle the handover and your records so nothing drops between contracts.

IR35 and off-payroll working

IR35: Inside vs Outside, and Why It Decides Your Take-Home

IR35, the off-payroll working rules, exists to stop people working like an employee while being paid like a company. It is the single biggest factor in what you actually take home.

Outside IR35, you run a genuine business: you can pay yourself a small salary and take the rest as dividends, and you control your expenses. Inside IR35, most of your contract income is taxed close to employment, so the limited company advantage largely disappears.

Whether you are inside or outside is not your choice alone. It depends on your real working practices, such as your right to send a substitute, who controls the work, and whether you carry business risk. For many private-sector contracts the end client now decides your status; for others you assess it yourself.

We review each contract and how you actually work before you sign, so there are no nasty surprises. Where a status is borderline, we tell you plainly rather than letting you assume the answer you would like.

Your trading structure

Limited Company vs Umbrella for Contractors

An umbrella company employs you and runs everything through PAYE. It is simple and it is usually the sensible route for short or inside-IR35 contracts, but you are taxed as an employee and you carry the cost of the umbrella fee.

Your own limited company gives you control and, on outside-IR35 work, a more efficient way to draw your income. The trade-off is more admin: year-end accounts, Corporation Tax, a Confirmation Statement and director payroll all sit on you.

The right answer depends on your contracts, your day rate and how long you plan to keep contracting. We model both for your situation and tell you which one genuinely leaves you better off, rather than defaulting to whatever is easiest to sell.

Paying yourself

Optimal Salary and Dividends for Contractors

Through your own company you do not just take a wage. Your company pays Corporation Tax on its profits, then you draw money as a mix of salary and dividends.

A modest director salary keeps your National Insurance record ticking over and is usually a deductible cost for the company. The rest comes out as dividends, which are taxed differently from salary and only after Corporation Tax has been paid.

Get the split right and you keep more of your day rate, legitimately. Get it wrong, and you either overpay tax or draw dividends the company cannot actually support, which causes problems later.

We set your salary level, run your director payroll and prepare the dividend paperwork properly, so every withdrawal is recorded the way HMRC expects.

Allowable expenses

What Can Contractors Actually Claim?

More than you might think, but only what is genuinely for the business. The rules tighten when you work inside IR35, so claiming correctly matters.

  • A proportion of your home office costs
  • Equipment, laptops and software you use for work
  • Travel and subsistence between temporary workplaces
  • Accountancy and business banking fees
  • Professional and public liability insurance
  • Training and subscriptions that keep your skills current
  • Your business mobile and broadband (business use)
  • Pension contributions made through the company

Travel rules in particular depend on your IR35 status and how long you have been at one site, so we check each claim rather than waving it through. We also keep your VAT treatment right on what you buy.

Day-to-day numbers

The Contractor Accounts and Admin Cycle

Contracting runs on a rhythm of deadlines: VAT every quarter, payroll every month, a Confirmation Statement once a year, then your accounts and Corporation Tax after your year-end. Miss one and the penalties stack up fast.

We set up your bookkeeping so invoices, expenses and receipts flow in as you go, not in a panic before each deadline. That keeps your VAT returns accurate and your numbers live.

If you also have income outside your company, we handle your personal Self Assessment too, including the dividends you have drawn, so the whole picture ties up.

Making the move

Switching Accountants Mid-Contract

You do not have to wait for your year-end to switch. Changing contractor accountant mid-contract is routine, and a good one makes it painless.

We contact your current accountant for the professional clearance and records, pick up your bookkeeping where it stands, and make sure no VAT return, payroll run or filing deadline slips during the handover.

You keep contracting as normal. We sort the paperwork in the background and confirm once everything has moved across cleanly.

Simple, fixed fees

Fixed Monthly Pricing & Packages for Contractors

Most limited company contractors pay between £99 and £199 a month, covering your accounts, payroll, VAT and the IR35 support that matters most.

No hourly rates. No surprise bills. One fixed fee, a named, qualified accountant who knows contracting, and a 30-day money-back guarantee.

  • Essentials

    Startups and small companies that need essential compliance and year-end support without VAT or payroll.

    £99/month
    • Preparation of Company Year-End Financial Statements
    • Year End Corporation Tax Computation
    • Submission of CT600 to HMRC
    • Statement of Account submissions to Companies House
  • Premium Plus

    Growing businesses that need complete accounting services, VAT return management, and payroll handling.

    £199/month
    • Everything in Essentials
    • Quarterly VAT return calculation and submission
    • Payroll and benefits management
  • Enterprise

    Established businesses that want strategic mentoring, business planning, and a part-time finance director driving growth.

    £499/month
    • Everything in Premium Plus
    • Business mentoring
    • Part-time finance director
    • Business plan
Trusted by contractors

What Our Clients Say.

  1. I’ve used several accountants in the past, but hands down there is no one better than Harvey at Zmartly. He really understands exactly what advice you’re looking for and explains everything clearly and professionally. Nothing ever feels rushed…
    Google reviewer Heena
    HeenaVerified Google review · 4 months ago
  2. I’ve had an excellent experience working with Zmartly. Harvey and the team are professional, responsive, and genuinely supportive. They explain things clearly, stay on top of deadlines, and always look for practical ways to save tax and improve…
    Google reviewer land4 success (chill feel good)
    land4 success (chill feel good)Verified Google review · 5 months ago
  3. I started working with Zmartly Accountants after having serious issues with my previous accounting firm. They were missing deadlines, incorrectly calculating VAT, constantly late, and extremely difficult and frustrating to communicate with. Switching to Zmartly was a huge…
    Google reviewer Jorge Carballo Gomez
    Jorge Carballo GomezVerified Google review · 5 months ago
  4. Great proactive service always up to date regarding accounting legislation. Harvey and Team will be always helping you with advise how to make your books look good. Already over 4 years using their service very happy.
    Google reviewer Auris Property Academy
    Auris Property AcademyVerified Google review · 8 months ago
  5. I've had a terrible experience with multiple accountants. Zmartly have been incredible. If you do ecommerce / Amazon FBA you definitely need to go with someone who understands the complexities with it. Thanks to Harvey and his amazing…
    Google reviewer Sean Barrington
    Sean BarringtonVerified Google review · 5 months ago
  6. I’ve used several accountants in the past, but hands down there is no one better than Harvey at Zmartly. He really understands exactly what advice you’re looking for and explains everything clearly and professionally. Nothing ever feels rushed…
    Google reviewer Heena
    HeenaVerified Google review · 4 months ago
  7. I’ve had an excellent experience working with Zmartly. Harvey and the team are professional, responsive, and genuinely supportive. They explain things clearly, stay on top of deadlines, and always look for practical ways to save tax and improve…
    Google reviewer land4 success (chill feel good)
    land4 success (chill feel good)Verified Google review · 5 months ago
  8. I started working with Zmartly Accountants after having serious issues with my previous accounting firm. They were missing deadlines, incorrectly calculating VAT, constantly late, and extremely difficult and frustrating to communicate with. Switching to Zmartly was a huge…
    Google reviewer Jorge Carballo Gomez
    Jorge Carballo GomezVerified Google review · 5 months ago
  9. Great proactive service always up to date regarding accounting legislation. Harvey and Team will be always helping you with advise how to make your books look good. Already over 4 years using their service very happy.
    Google reviewer Auris Property Academy
    Auris Property AcademyVerified Google review · 8 months ago
  10. I've had a terrible experience with multiple accountants. Zmartly have been incredible. If you do ecommerce / Amazon FBA you definitely need to go with someone who understands the complexities with it. Thanks to Harvey and his amazing…
    Google reviewer Sean Barrington
    Sean BarringtonVerified Google review · 5 months ago
4.9
Google · based on 63 reviews
Common questions

Frequently Asked Questions

It turns on whether you'd be an employee if you worked for the client directly, judged on control, personal service (can you send a substitute?), and mutuality of obligation. For medium and large clients the client decides and must give you a Status Determination Statement; for small clients and many overseas engagements the responsibility stays with you and your company. We review the written contract and how you actually work, because HMRC looks at both.

Often not, since 2017. If your VAT-inclusive spend on goods is under 2% of turnover, or under £1,000 a year, you're a limited cost trader and must use the 16.5% rate, which leaves almost no FRS gain. Most consultants and IT contractors are labour-only and fall into this. We run the comparison on your real figures rather than assuming the old sector percentage still helps.

Typically a modest director's salary that still counts toward your state pension, topped up with dividends. Dividends above the £500 allowance are taxed at 10.75% in the basic band, 35.75% in the higher band and 39.35% above that, and they must come from genuine retained profit after Corporation Tax. We model your specific income each year so you don't overpay or vote an illegal dividend.

When your VAT-taxable turnover exceeds £90,000 in any rolling 12 months, or you expect to in the next 30 days. Some contractors register voluntarily below that to reclaim input VAT or look established to clients. We watch your rolling total so you register on time and avoid late-registration penalties.

Travel to a temporary workplace is allowable, but a site becomes permanent once you expect to spend more than 40% of your time there for over 24 months, after which the relief stops. You can claim 55p a mile for the first 10,000 business miles and 25p after, plus a reasonable home-office cost and overnight subsistence when staying away. We keep the records HMRC expects to see.

19% on profits up to £50,000, the 25% main rate above £250,000, and an effective rate between the two via marginal relief in between. Those thresholds shrink if you have associated companies, which catches contractors with more than one company, so we check that before filing.

Everything, on a rolling monthly basis with no long tie-in: bookkeeping, VAT, payroll, company accounts, Corporation Tax and your personal Self Assessment, with a named qualified accountant who replies within 72 hours. Pricing is fixed at £99, £199 or £499 a month depending on your needs, backed by a 30-day money-back guarantee.

Stop guessing. Stop overpaying. Let's sort your tax once and for all.

Zmartly Ltd · 20–22 Wenlock Road, London N1 7GU · 020 8175 5145 · info@zmartly.co.uk

ICAEW, ACCA and AAT qualified accountants.