CIS accountant
The Construction Industry Scheme deducts tax before you ever see it — 20% off every payment if you're registered, a punishing 30% if you're not. A CIS accountant works both ends: subcontractors usually have a refund waiting (deductions overshoot the real bill once expenses are claimed — £1,500+ back is typical), and contractors need verifications, deduction statements and monthly returns filed without fail.
How we handle it
We handle registrations (£49 subcontractor, £69 contractor), the monthly contractor cycle from £30 a month, gross payment status applications for those who qualify, and the year-end returns that turn a year of deductions into an actual refund in your bank.
The fixed fees behind this service
| Service | Fixed fee |
|---|---|
| CIS Tax Returns | from £30/mo |
| CIS Registration | £49 |
| Self Assessment Tax Returns | from £129 |
| Payroll | from £25/mo |
CIS Tax Returns
Construction Industry Scheme refunds and returns for subcontractors and contractors.
- Monthly CIS300 returns filed for contractors
- Subcontractor verification handled
- Annual refund claims for subcontractors — average refunds are substantial
| Subcontractor annual return + refund claim | £149 |
| Contractor monthly CIS returns | £30/mo |
| CIS + payroll bundle | £49/mo |
CIS Registration
Construction Industry Scheme registration — the difference between 20% and 30% off every payment.
- Registered with HMRC as subcontractor, contractor or both — matched to how you actually work
- UTR and business details verified first, so payments match HMRC's records and the right rate applies
- Gross payment status assessed honestly — we tell you if you'd qualify before you pay for the application
| Subcontractor CIS registration | £49 |
| Contractor CIS registration | £69 |
| Both roles (pay and get paid) | £99 |
Self Assessment Tax Returns
Prepared, checked and filed with HMRC — sole traders, landlords, high earners.
- Full SA100 return prepared and filed with HMRC
- All supplementary pages your situation needs — self-employment, property, dividends, CGT
- Your tax liability checked and explained in plain English
| Straightforward return — one income source | £129 |
| With rental property income | £169 |
| With capital gains (property, shares, crypto) | £199 |
Self Assessment Tax Returns — full details, packages and FAQs →
Payroll
Payslips, RTI submissions and pensions — run for you, on time, every time.
- Payslips produced every pay run — monthly or weekly
- RTI submissions to HMRC on or before every payday
- Auto-enrolment pension assessments and submissions
| Director-only payroll (1 person) | £25/mo |
| Up to 5 employees | £45/mo |
| Up to 10 employees | £69/mo |
From first message to done
WhatsApp or the form — a few sentences is enough. A real person replies the same working day.
One price for the job, confirmed before anything starts. Complex case? We say so now, not on the invoice.
Photos of documents are fine. We chase whatever's missing — that's part of the job, not yours.
You review everything first; filings go to HMRC or Companies House electronically with same-day confirmation.
Deadlines that apply here
| Date | What happens |
|---|---|
| 19th of each month | CIS300 monthly return due for contractors — £100 penalty per late month |
| 31 Jan 2027 | Subcontractor Self Assessment deadline — where CIS refunds are claimed |
| 5 Oct 2026 | Deadline to register for Self Assessment if you're newly self-employed |
| 31 Oct 2026 | Paper return deadline (almost nobody should be filing on paper) |
| 31 Jan 2027 | Online filing deadline and balancing payment due — miss it and HMRC charges an automatic £100 penalty |
| 31 Jul 2027 | Second payment on account due, if you make them |
| On or before each payday | RTI Full Payment Submission due to HMRC — every single pay run |
| 22nd of each month | PAYE and NI payment due to HMRC (19th if paying by post) |
Why choose Bohzo Accountants in the UK?
Your fee is agreed before any work starts and never changes mid-job. No hourly billing, ever.
Secure portal and WhatsApp — no office visits, no printing, no waiting rooms.
Bohzo Accountants is a trading name of IGI Security Services Ltd, Company No. 15881180.
We track every HMRC and Companies House date that applies to you, so you don't have to.
Terms you'll meet along the way
CIS deduction statement
The monthly statement contractors must give subcontractors showing gross pay and tax withheld — the core evidence for refund claims.
Gross payment status
The 0% deduction rate for subcontractors who pass HMRC's turnover and compliance tests — you're paid in full and settle tax through your own returns.
Verification
The check contractors must run with HMRC before first paying any subcontractor, which dictates the deduction rate: 0%, 20% or 30%.
UTR
Your Unique Taxpayer Reference — the 10-digit number HMRC issues when you register for Self Assessment. Lifelong, and needed for every return.
Payments on account
Advance payments toward next year's tax, due 31 January and 31 July, triggered once your bill passes £1,000. The first year they apply effectively bills 150% at once.
SA100
The main Self Assessment return form. Supplementary pages bolt on for employment, self-employment, property, capital gains and foreign income.
Balancing payment
The difference between what your payments on account covered and what the year's tax actually was — settled each 31 January.
RTI
Real Time Information — the rule that HMRC must receive a payroll submission on or before every payday, not at year end.
CIS accountant: your questions answered
How much CIS refund am I likely to get?
Subcontractors on 20% deductions with normal expenses — mileage, tools, materials, insurance — typically see £1,500–£3,000 back for a full year. The deduction is calculated on your labour before any expenses or your personal allowance, so overpayment is the default outcome, not the exception.
How fast does the refund arrive?
We file the return as soon as your records and deduction statements are together; HMRC usually pays out in one to four weeks after filing. Filing in April rather than January means the refund lands months earlier — same money, sooner.
I'm a contractor — what are my CIS duties?
Verify each subcontractor with HMRC before first payment, deduct at the rate HMRC specifies, issue deduction statements, file a return every month (even a nil one), and pay the deductions over. Miss a monthly return and penalties start at £100 and stack. Our monthly service runs the whole cycle.
How much CIS refund am I owed?
Most subcontractors have 20% deducted at source all year — usually more than their final tax bill once expenses and the personal allowance are counted. Refunds of £1,500–£3,000 are common, claimed through your Self Assessment.
How quickly will my refund arrive?
Once the return is filed, HMRC typically pays CIS refunds within 2–6 weeks. We file promptly after 6 April so the claim is in the queue as early as possible.
What happens if I work without registering?
Contractors must deduct 30% from your payments instead of the registered 20% — a third of your money gone until you claim it back through a tax return, often a year later. Registration protects your cash flow immediately; it's usually confirmed within days.
Am I a contractor or a subcontractor?
Pay others for construction work and you're a contractor, with verification and monthly-return duties. Get paid for construction work and you're a subcontractor. Plenty of firms are both — the combined registration covers it.
What does the £129 fee include?
Preparation and online filing of your full SA100 return, including the supplementary pages your situation needs. If your return is more complex — rental income, capital gains — the packages above show the fixed price, and we confirm it in writing before starting.
I've missed the deadline — can you still help?
Yes. Late returns are common and fixable: we prepare and file the outstanding return quickly, and where there's a reasonable excuse we help you appeal penalties. The sooner it's filed, the sooner the penalties stop growing.
I'm the only employee of my company — do I need payroll?
If you pay yourself a salary, yes — you need a PAYE scheme and RTI submissions even for one person. Director-only payroll is our most popular package at £25/mo, and we set the salary at the most tax-efficient level for you.
What is auto-enrolment and does it apply to me?
Every employer must assess staff for a workplace pension and enrol eligible employees. Even if your only staff member is you as director, you have duties to declare. We handle assessments, letters and declarations as part of the service.
CIS Tax Returns in popular locations
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