Best Accountant for IT Contractors UK (2026 Guide)
How the 8 leading UK contractor accountants compare on the things IT contractors actually rely on — and why we built Clever Accounts to win on every one.
Quick Summary
- Clever Accounts is the only provider in this list with Clever FLEX — seamless switching between your PSC and our umbrella when IR35 status changes, with no second provider and no payment gap.
- Three checks matter most when comparing contractor accountants: named accountant included (not portal-only), unlimited IR35 reviews (not charged per contract), and FreeAgent bundled (not £19/mo extra). We bundle all three at £104.50/mo.
- IT contractors typically pay £85–£130/month for a specialist contractor accountant. Cheaper headline prices usually mean portal-led support or per-item charges that surface later.
- Switching accountants mid-year is straightforward — your new firm handles the professional clearance letter. No reason to wait for year-end.
What an IT contractor accountant actually does
A specialist contractor accountant is actively involved throughout the year — not just at year-end.
Company formation
Setting up your limited company correctly, including the right SIC code and share structure.
Quarterly VAT returns
Most contractors use the Flat Rate scheme — your accountant manages this so the difference stays in your pocket.
Monthly payroll
Running a small salary to maintain your NI record without triggering large PAYE bills.
Dividend planning
Advising when and how much to draw as dividends to stay within basic rate tax bands.
IR35 contract reviews
Reviewing your contracts to confirm inside or outside IR35 status before you sign.
Clever FLEX (CA only)
Seamless switching between PSC and umbrella when contract status changes — no admin, no gaps.
Year-end accounts & CT600
Statutory accounts filed at Companies House, Corporation Tax return filed with HMRC.
Self Assessment
Your personal tax return filed annually, incorporating dividends, salary, and any other income.
What IR35 means for your take-home pay
IR35 determines whether HMRC considers you a “disguised employee” of your end client. Outside IR35, you pay yourself a small salary and take most income as dividends — taxed at significantly lower rates. Inside IR35, your company must deduct income tax and National Insurance on your full contract rate before you see anything.
The tax difference is typically 15–25% of gross income. For most private-sector contracts since 2021, the end client determines your IR35 status — making professional contract reviews essential before you sign.
How much should an IT contractor pay?
Monthly fees are billed by direct debit, plus VAT.
Budget
£65–£85/mo
- Year-end accounts
- Corporation Tax (CT600)
- Self Assessment
- Basic payroll
- ✗ Named accountant
- ✗ IR35 reviews
- ✗ FreeAgent included
- ✗ Proactive advice
Mid-market
£85–£120/mo
- Everything in Budget
- Named accountant
- Accounting software
- IR35 contract reviews
Premium
£120–£160+/mo
- Everything in Mid-market
- Proactive tax planning
- Priority phone support
- Pension planning
Hidden costs to watch for
- IR35 contract reviews charged per review (£50–£200 each at some firms)
- Mortgage reference letters charged separately (£50–£150)
- Accounting software not bundled — add £16–£35/month for FreeAgent or Xero
- Amended returns or late filing work billed at hourly rates
Why we win
Five reasons we're built to beat this list
We're not the cheapest in the table below — and we don't want to be. Here's what £104.50/month buys an IT contractor at Clever Accounts that the rest of the list doesn't match.
Clever FLEX — the only PSC ↔ umbrella switch in the market
When a contract goes inside IR35, most providers leave you to find an umbrella separately, sort the handover, and pay setup fees on both sides. Clever FLEX moves you between PSC and umbrella inside the same Clever Accounts relationship — no extra admin, no payment gap, no second provider to chase.
Unlimited IR35 contract reviews — no per-review charges, ever
Take as many contracts as you want, review every one before signing, and never see a per-review invoice. Several providers in the table cap free reviews and charge £50–£200 thereafter — ask them directly before signing up.
FreeAgent included free — not £19/month extra, not locked to a proprietary platform
FreeAgent at retail is £19/month, and inniAccounts ties you to their own platform with no FreeAgent export. We bundle FreeAgent and a named contractor specialist together — no add-on, no lock-in.
20+ years of contractor specialism, 10,000+ UK businesses, UK-staffed
UK-based Leeds office, dedicated contractor team, no offshore call centre. Your named accountant has done your kind of work before — for hundreds of IT contractors operating inside and outside IR35.
One published flat fee — no surcharges on the moments that matter
£104.50/month covers limited company accounts, CT600, payroll, VAT, personal Self Assessment, unlimited IR35 reviews, FreeAgent and Clever FLEX. No setup fee, no per-review charge, no mortgage-reference surcharge when you need one for a property purchase.
How the rest of the list compares
Pricing last verified April 2026. We've added a “watch out” note on each competitor — the practical thing to verify directly with them before signing. Headline prices on this market regularly hide what isn't included.
| Provider | Monthly fee | Software | Named accountant | IR35 included | Trustpilot | Best for |
|---|---|---|---|---|---|---|
Clever AccountsOur pick | £104.50/mo | FreeAgent | Excellent | IT contractors who want full-service plus PSC ↔ umbrella flexibility | ||
Crunch | From £82/mo | Crunch platform | ✗ | ✗ | Excellent | Price-sensitive contractors comfortable self-serving via portal |
Caroola | From £89/mo | FreeAgent | Excellent | Contractors who expect to move between PSC and umbrella | ||
inniAccounts | From £79/mo | inniAccounts (proprietary) | Excellent | Contractors who want everything inside a single bespoke platform | ||
Gorilla Accounting | From £95/mo | FreeAgent | Excellent | Contractors prioritising single-accountant relationship over scale | ||
Brookson | From £79/mo | Varies by plan | Great | Contractors who genuinely expect to move between PSC and umbrella | ||
ClearSky | From £85/mo | FreeAgent | Excellent | Contractors wanting an IR35-focused mid-market firm | ||
Dolan Accountancy | From £105/mo | FreeAgent | Excellent | Contractors comfortable paying a premium for boutique service |
Specialist contractor accountant with 20+ years' experience and 10,000+ UK businesses served. UK-based Leeds office — no offshore support. The only provider in this list with Clever FLEX: seamless switching between your PSC and our umbrella when a contract status changes, with no extra admin, no second provider, and no payment gap. Unlimited IR35 reviews, FreeAgent, payroll, VAT, year-end accounts, CT600 and personal Self Assessment are all included at one flat monthly fee.
One of the UK's largest online accountants. Strong competitive headline pricing.
Watch out: The headline price is for portal-led plans — a named accountant requires the Professional tier or above. Self Assessment is typically an add-on, and IR35 contract reviews are usually charged per contract rather than included. Add these to the headline before comparing.
Formed from the merger of SG Accounting and Caroola. Markets a PSC + umbrella crossover offering.
Watch out: Post-merger service consistency has been mixed in published reviews. Confirm which entity holds your contract, which named accountant you'll deal with, and how PSC → umbrella transitions are priced and handed off.
Proprietary software with real-time tax position and dividend capacity visibility.
Watch out: You're tied to their own platform — no FreeAgent or Xero. If you ever switch providers, you have to migrate out of inniAccounts' tooling rather than just porting a FreeAgent file. Less helpful if your end client, mortgage adviser or pension provider expects FreeAgent-format records.
Smaller specialist practice — that's positioned as the selling point.
Watch out: Small-team practices carry concentration risk: if your accountant moves on or capacity tightens during busy filing periods (January Self Assessment, April year-ends), cover options are limited. No PSC/umbrella crossover if your contract status changes mid-year.
Long-established contractor brand offering both accountancy and umbrella services under one roof.
Watch out: Trustpilot ratings trail most peers on this list. Verify which entity (accountancy or umbrella) will bill you, and how transitions between the two are priced — bundled offerings sometimes obscure where one fee ends and the next begins.
Mid-market contractor accountant with a stated IR35 specialism.
Watch out: Headline price is the entry tier — verify FreeAgent licence is bundled (rather than billed separately) and confirm whether IR35 reviews are unlimited or capped per year.
Boutique contractor accountant with a loyal long-tenure client base.
Watch out: Premium price point above most mid-market peers, and boutique capacity means new-client waiting lists are possible in busy periods. No PSC/umbrella crossover.
Clever Accounts
Our pickSpecialist contractor accountant with 20+ years' experience and 10,000+ UK businesses served. UK-based Leeds office — no offshore support. The only provider in this list with Clever FLEX: seamless switching between your PSC and our umbrella when a contract status changes, with no extra admin, no second provider, and no payment gap. Unlimited IR35 reviews, FreeAgent, payroll, VAT, year-end accounts, CT600 and personal Self Assessment are all included at one flat monthly fee.
Crunch
One of the UK's largest online accountants. Strong competitive headline pricing.
Watch out: The headline price is for portal-led plans — a named accountant requires the Professional tier or above. Self Assessment is typically an add-on, and IR35 contract reviews are usually charged per contract rather than included. Add these to the headline before comparing.
Caroola
Formed from the merger of SG Accounting and Caroola. Markets a PSC + umbrella crossover offering.
Watch out: Post-merger service consistency has been mixed in published reviews. Confirm which entity holds your contract, which named accountant you'll deal with, and how PSC → umbrella transitions are priced and handed off.
inniAccounts
Proprietary software with real-time tax position and dividend capacity visibility.
Watch out: You're tied to their own platform — no FreeAgent or Xero. If you ever switch providers, you have to migrate out of inniAccounts' tooling rather than just porting a FreeAgent file. Less helpful if your end client, mortgage adviser or pension provider expects FreeAgent-format records.
Gorilla Accounting
Smaller specialist practice — that's positioned as the selling point.
Watch out: Small-team practices carry concentration risk: if your accountant moves on or capacity tightens during busy filing periods (January Self Assessment, April year-ends), cover options are limited. No PSC/umbrella crossover if your contract status changes mid-year.
Brookson
Long-established contractor brand offering both accountancy and umbrella services under one roof.
Watch out: Trustpilot ratings trail most peers on this list. Verify which entity (accountancy or umbrella) will bill you, and how transitions between the two are priced — bundled offerings sometimes obscure where one fee ends and the next begins.
ClearSky
Mid-market contractor accountant with a stated IR35 specialism.
Watch out: Headline price is the entry tier — verify FreeAgent licence is bundled (rather than billed separately) and confirm whether IR35 reviews are unlimited or capped per year.
Dolan Accountancy
Boutique contractor accountant with a loyal long-tenure client base.
Watch out: Premium price point above most mid-market peers, and boutique capacity means new-client waiting lists are possible in busy periods. No PSC/umbrella crossover.
How to choose: a decision framework
Before signing up with any provider, ask these five questions directly.
Is a named accountant included at this price?
If the answer involves 'portal' or 'ticket system' as the primary support channel, you're in the budget tier. Fine if you're comfortable self-serving — just know what you're buying.
Are IR35 contract reviews included, and is there a limit?
Some providers include one or two free reviews then charge per additional review. If you change clients frequently, unlimited IR35 reviews is the standard to look for.
Is accounting software bundled, or is it extra?
If it's extra, add the licence cost to their monthly fee for a true price comparison. FreeAgent or Xero adds £16–£35/month.
What's your response time commitment?
Ask specifically: 'If I send an email on a Tuesday morning, when should I expect a reply?' A credible answer is same or next business day. Vague answers about 'best efforts' are a red flag.
How do you handle mortgage reference letters?
An accountant who's helped contractors get mortgages dozens of times has a process. One who hasn't will fumble it when you need it most.
Red flags to walk away from
Switching accountants: the step-by-step
You can switch at any point in the year — no need to wait until your year-end.
Sign up with us
Complete our simple sign-up form. Your new accountant takes it from here.
Notify your old firm
A simple email is all you need. No reason required.
Professional clearance
We write to your old accountant. By ICAEW/ACCA ethics rules, they must respond and hand over your records.
Records transferred
Accounts, CT600, payroll history, VAT returns — we collect everything.
HMRC authorisation
We guide you through the 64-8 form so HMRC deals with us directly.
How long does switching take?
Typically 3–6 weeks from sign-up to full HMRC authorisation. No compliance risk from switching mid-year when both firms coordinate through professional clearance.
Frequently Asked Questions
Common questions from IT contractors about accountancy, IR35, and tax.
The contractor accountant built for IT professionals
Dedicated accountant · FreeAgent included · Unlimited IR35 reviews · Clever FLEX — all for £104.50/month.