Limited Company Accountants UK

Last updated: February 2026
If you run a limited company, you’re juggling two systems at once: Companies House (company accounts) and HMRC (Corporation Tax and the Company Tax Return). Limited company accountants UK help you keep both on track, but it’s still your responsibility as a director to make sure filings are correct and on time.

This guide explains what limited company accountants UK typically do, the key deadlines, what’s usually included vs what costs extra, and the workflow and controls that keep your accounts tidy throughout the year.

If you want a broader overview of service types (bookkeeping vs accounts vs tax), see Accounting Services in the UK.

Key takeaways

  • Limited company accountants UK deal with two deadline tracks: Companies House accounts and HMRC Corporation Tax filing/payment. (GOV.UK)
  • The free joint online filing service closes on 31 March 2026 — plan how you’ll file going forward (usually commercial software). (GOV.UK)
  • Identity verification becomes a legal requirement from 18 November 2025 with a phased transition period — factor this into admin and onboarding. (GOV.UK)
  • Included vs extra matters more than the headline fee. VAT, payroll, catch-up work, and management accounts are common add-ons.
  • Clean monthly records reduce year-end costs. Most “unexpected fees” come from clean-up time, not the accounts themselves.

At a glance

Who this is for

  • Directors of small limited companies comparing limited company accountants UK
  • New companies setting up their first year-end process
  • Companies switching accountants and wanting a clean handover

What a limited company accountant usually covers

  • Accounts preparation for Companies House
  • Corporation Tax workflow (Company Tax Return preparation and filing support)
  • Queries to finalise figures and resolve obvious issues

Main cost drivers

  • Record quality (clean monthly close vs year-end scramble)
  • VAT registration and return frequency
  • Payroll headcount + pensions
  • Transaction volume and complexity (multiple banks, sales channels, inventory)
  • Support level (annual-only vs monthly package + advice)

What to prepare before onboarding

  • Your accounting reference date (ARD) / year end
  • Prior accounts and previous filings (if any)
  • Software access (or what you want to use)
  • VAT/PAYE references (if registered)
  • A rough monthly transaction volume estimate

Table of Contents

  1. Key takeaways
  2. At a glance
  3. What limited company accountants UK actually do
  4. Your core deadlines: Companies House vs HMRC
  5. Important change: the joint online filing service closes on 31 March 2026
  6. Identity verification (Companies House): what directors/PSCs should know
  7. What’s included vs what’s often extra (Ltd edition)
  8. Costs and cost drivers: how limited company accountants UK are priced
  9. Your monthly workflow: what good looks like (and why it reduces fees)
  10. What to prepare before onboarding (so fees don’t balloon)
  11. Common mistakes and red flags (Ltd-specific)
  12. Tools & templates (copy/paste friendly)
  13. FAQs
  14. Sources & further reading (official)
  15. Related guides (internal)

What limited company accountants UK actually do

A simple way to understand limited company accountants UK is to split the work into three buckets:

  1. Compliance (deadline work)
  2. Routine finance ops (keeping records clean during the year)
  3. One-off projects (fixes, migrations, specific tasks)

Compliance vs ongoing support vs one-off projects

Compliance (the minimum most companies need)

  • Prepare annual accounts for Companies House
  • Prepare and file the Company Tax Return (CT600) for HMRC
  • Help you interpret what’s needed and what documents are missing
  • Explain deadlines and what happens if you miss them

Ongoing support (what “monthly packages” usually include)

  • Monthly or quarterly reviews
  • Bank reconciliations / bookkeeping checks
  • VAT return support (if registered)
  • Director payroll/dividend workflow support (high-level)
  • “Sanity checks” that stop surprises at year-end

One-off projects (often billed separately)

  • Catch-up work (months behind)
  • Software migrations or “fix the bookkeeping file”
  • VAT registration/deregistration work
  • Management accounts setup and reporting packs
  • Investigations (director loan account clean-up, historic corrections)

What you still own as a director (responsibility clarity)

Even with limited company accountants UK, directors remain responsible for:

  • Keeping adequate records
  • Approving accounts and submissions
  • Ensuring filings are made by deadlines

A good accountant makes this easier with clear checklists and reminders, but they can’t replace your responsibility to provide complete information on time.

Your core deadlines: Companies House vs HMRC

Limited companies often get caught out because accounts filing and Corporation Tax deadlines are not the same.

Companies House accounts filing deadline (private companies)

For private companies, annual accounts are generally due 9 months after the end of the accounting reference period. (GOV.UK)

If it’s your first set of accounts, the deadline is often longer (commonly up to 21 months after incorporation for first accounts, depending on your period). (GOV.UK)

Company Tax Return deadline (HMRC)

The deadline to file your Company Tax Return is 12 months after the end of the accounting period it covers. (GOV.UK)

Corporation Tax payment deadline (separate)

There’s a separate deadline to pay Corporation Tax. It’s usually 9 months and 1 day after the end of the accounting period. (GOV.UK)

A practical timeline example (so it sticks)

If your year end is 31 March:

  • Accounts to Companies House: typically due by 31 December
  • Corporation Tax payment: typically due by 1 January
  • Company Tax Return filing: typically due by 31 March the following year

Your accountant can only work with what they have, so the best way to keep fees stable is to run a monthly close rhythm (more on that below).

Important change: the joint online filing service closes on 31 March 2026

This one matters operationally. The online filing service that lets companies file accounts and the Company Tax Return through the joint service will close on 31 March 2026. (GOV.UK)

What’s closing, in plain English

Up to and including 31 March 2026, you can still file and amend:

  • Company Tax Returns with HMRC, and
  • Accounts with Companies House

After that date, you’ll need alternative methods — most commonly commercial software to file. (GOV.UK)

What to do before the service closes

Save your previous filings now (so you’re not blind after 31 March 2026)

One practical detail that gets missed in the “software transition” conversation: if you currently use the joint filing service, you should download and save copies of recent submissions before it closes.

GOV.UK guidance explains you’ll need to use the HMRC online service to download and save at least the last 3 years of filed returns on or before 31 March 2026. After that date you may not be able to access previous returns through the service, and you may still need them for queries, comparisons, agent handover, or compliance checks. (GOV.UK)

A simple “filing archive” routine (10–20 minutes, once a year):

  • Save a copy of the Company Tax Return for the year (HTML/PDF export)
  • Save the accounts submission copy for Companies House
  • Save any computation/supporting summary your software produces
  • Keep them in a single folder by year end (e.g., “FY2025–26”) with a short note: “What changed this year?”

This matters because switching filing routes (free service → software → agent) is when companies lose historic context. When your accountant can see what was filed last year, they spend less time rebuilding the story — and you spend less on clean-up.

If you use the free service now, limited company accountants UK should help you plan the transition, but you can do a simple version yourself:

  • Confirm how you currently file (free service, software, accountant portal)
  • Ask what will change after 31 March 2026
  • Decide who owns the software choice (you or the accountant)
  • Document the “year-end workflow” (what you provide, when, and how approvals happen)

This avoids last-minute changes that create delays and extra fees.

Identity verification (Companies House): what directors/PSCs should know

Companies House is phasing in identity verification to improve register integrity.

The key dates

  • From 18 November 2025, identity verification becomes a legal requirement and begins a 12-month transition period. (GOV.UK)
  • That date is not a single hard deadline for everyone; it marks the start of the phased rollout and due dates depending on your role and filings. (GOV.UK)

Who is affected

Identity verification requirements apply to:

  • Directors
  • People with Significant Control (PSCs)
    …and other relevant roles as the rollout progresses. (GOV.UK)

How verification may happen (high level)

You can generally verify:

  • directly (for example, through a GOV.UK identity route), or
  • through an Authorised Corporate Service Provider (ACSP) such as certain accountants or solicitors where applicable

The operational takeaway: when you compare limited company accountants UK, ask how they handle identity verification steps in onboarding and ongoing compliance. (GOV.UK)

Practical admin checklist

To keep this painless:

  • List all director/PSC roles you hold
  • Make sure you have appropriate ID available
  • Keep a record of any codes/confirmations issued during verification
  • Add identity verification checks into your annual compliance routine (alongside accounts, tax return, confirmation statement)

How identity verification links to your confirmation statement (what directors should expect)

The key operational point for many limited companies is that identity verification doesn’t just “happen in the background” — it becomes part of your Companies House compliance routine.

GOV.UK guidance is clear that 18 November 2025 marks the start of mandatory identity verification and a 12-month transition period. It’s not a single deadline for everyone; it’s the start of staged due dates depending on your role and filings. (GOV.UK)

Companies House’s rollout announcement adds a practical detail for existing directors: during the transition period, they’ll typically need to confirm they’ve verified their identity when they file their next annual confirmation statement. That means the confirmation statement becomes the “trigger point” where this requirement shows up for many directors in real life. (GOV.UK)

What to do (simple, director-friendly):

  • Identify who’s in scope now: list all directors + PSCs (and any other roles you hold across companies)
  • Plan verification early: don’t wait until you’re about to file accounts or the confirmation statement
  • Store proof sensibly: keep a record of the verification confirmation/code where you keep other compliance admin
  • Add it to your annual checklist: treat it like an annual “admin gate” alongside accounts and Corporation Tax

Why your accountant may care
Limited company accountants UK won’t always perform identity verification for you, but it can affect:

  • onboarding timelines (new directors/appointments)
  • who can approve filings and when
  • whether you use an authorised service provider route where applicable

So when you’re comparing accountants, it’s worth asking one extra “process” question:
“At what point in the year do you expect identity verification to be completed, and how do you track it alongside the confirmation statement?” (GOV.UK)

What’s included vs what’s often extra (Ltd edition)

This is where most misunderstandings happen. Two quotes from limited company accountants UK can look similar but cover totally different scopes.

Typically included (common baseline)

Often included in a standard limited company package:

  • Year-end accounts preparation for Companies House
  • Company Tax Return preparation (and filing support)
  • Basic queries and adjustments needed to finalise the year
  • A year-end summary of what’s been filed and what’s due next

Often extra (common add-ons)

These frequently sit outside the base price:

  • Bookkeeping (monthly categorisation and reconciliations)
  • VAT returns (and VAT scheme work)
  • Payroll (plus pensions and leavers/joiners)
  • Management accounts (monthly reporting packs)
  • Catch-up / clean-up work (months behind)
  • Director Self Assessment (for directors, where relevant)
  • Software migration / setup (moving to a new system, fixing bank feeds)

“Hidden extras” questions (copy/paste)

Use these questions to compare limited company accountants UK properly:

  • What exactly is included in the base fee? (list deliverables)
  • Is bookkeeping included? If not, what standard do you expect from me?
  • Is VAT included? If not, what is the add-on cost and frequency?
  • Is payroll included, and does it include pensions and leavers/joiners?
  • Is the Company Tax Return included or billed separately from accounts?
  • How do you price clean-up work if records are behind?
  • Do you include basic support during the year, or is support billed hourly?
  • Is there an onboarding fee or minimum term?
  • Who owns the software subscription after March 2026? (GOV.UK)

Costs and cost drivers: how limited company accountants UK are priced

Most pricing is driven by time and risk:

  • time = how long it takes to produce clean, compliant numbers
  • risk = complexity, deadlines, and likelihood of corrections

Monthly package vs annual-only vs hourly

Monthly package

  • Predictable cost
  • Usually includes ongoing support
  • Best when you want stability and fewer year-end surprises

Annual-only

  • Lower cost in simple cases
  • Works best when bookkeeping is clean and consistent
  • If records are messy, annual-only often becomes expensive at year-end

Hourly / time-based

  • Useful for one-off projects
  • Often used for catch-up work, investigations, and complex corrections
  • Ask for a cap or staged approach to avoid scope creep

What pushes you up a “fee band”

Common fee multipliers for limited company accountants UK:

  • VAT registration (and frequent VAT queries)
  • Payroll headcount + pensions
  • High transaction volume (bank lines, invoices)
  • Multiple sales channels (Stripe/PayPal, marketplaces)
  • Director loan account complexity
  • Inventory/stock
  • Catch-up work (months behind)
  • Tight deadlines (late handover)

A simple rule: if your accountant has to rebuild your records, you’ll pay more than if they only need to review and file.

Director pay basics (high-level)

You don’t need to become a tax expert to keep fees stable, but you do need consistent records around:

  • director payroll (if any)
  • dividends and supporting paperwork
  • director loan account movements (money in/out)

Messy director loan records are one of the most common causes of year-end clean-up work.

For anything cost-related, keep fee intent “owned” by Accounting Fees in the UK

Your monthly workflow: what good looks like (and why it reduces fees)

The quickest way to reduce surprises is a steady monthly rhythm. Limited company accountants UK generally work best when the business has predictable, repeatable monthly inputs.

The “monthly close” rhythm (simple version)

Each month:

  • Reconcile bank transactions (ensure nothing is missing)
  • Upload/store invoices and receipts consistently
  • Check that large or unusual items are explained
  • Confirm payroll totals match what was run (if applicable)
  • Confirm VAT coding is consistent (if VAT registered)

Outcome: your year-end becomes a tidy wrap-up, not a rescue job.

Controls: permissions, approvals, audit trail

Strong controls protect you and keep the process efficient:

  • Limit admin access (only where necessary)
  • Use approval steps for journals and adjustments
  • Keep an audit trail (who changed what, when)
  • Avoid shared logins (you lose accountability and traceability)

When comparing limited company accountants UK, ask how they handle:

  • access roles in your software
  • approval steps for changes
  • how you’ll review and sign off key numbers before filing

Quarterly sanity checks (especially helpful)

Even if you don’t pay for monthly management accounts, quarterly checks can prevent year-end surprises:

  • VAT position makes sense (if registered)
  • payroll totals/pensions are consistent (if applicable)
  • director loan balance isn’t drifting into “unknown” territory
  • expenses and income categories are consistent

What to prepare before onboarding (so fees don’t balloon)

Good onboarding reduces both cost and stress.

Documents checklist

  • Last filed accounts (if any)
  • Prior Company Tax Return info (if any)
  • Key contracts and finance arrangements (if relevant)
  • VAT registration details and recent VAT returns (if applicable)
  • PAYE scheme references and payroll history (if applicable)

Access checklist (permissions-based)

  • Accounting software login (with appropriate role)
  • Bank feed access (or statement exports)
  • Receipt capture method (app, inbox, portal)
  • Document storage approach (shared folder/portal)
  • Who approves changes (director vs finance admin)

Tip: agree the “handover standard” upfront. Many limited company accountants UK price clean-up separately — and that’s fair, but you want it explicit.

Common mistakes and red flags (Ltd-specific)

Mistakes that create extra fees

  • Leaving everything to year-end (creates avoidable clean-up)
  • Mixing personal and business spending without documentation
  • No consistent receipt/invoice capture
  • Unreconciled bank activity (missing explanations)
  • Director loan account movements without clear records
  • Switching software mid-year without a plan (especially approaching 31 March 2026) (GOV.UK)

Red flags when choosing limited company accountants UK

  • Scope is vague (“accounts and tax handled”) with no deliverables list
  • VAT/payroll/bookkeeping not mentioned at all (implies future add-ons)
  • No clear process for approvals and access control
  • Promises of guaranteed tax outcomes or “we’ll save you £X” claims

Tools & templates (copy/paste friendly)

These are designed to be practical even if you don’t have a separate tools hub yet.

1) Ltd deadline planner (quick template)

Fill in your year end (ARD): __________

  • Companies House accounts due: year end + 9 months (GOV.UK)
  • Corporation Tax payment due: year end + 9 months + 1 day (GOV.UK)
  • Company Tax Return due: year end + 12 months (GOV.UK)

2) Year-end handover checklist (minimum)

  • Confirm year end date (ARD/accounting period)
  • Bank reconciliation completed to year end
  • All invoices/receipts captured
  • Payroll totals confirmed (if applicable)
  • VAT returns filed or scheduled (if applicable)
  • Notes for unusual transactions prepared
  • Director loan account movements explained (if applicable)

3) Questions to ask limited company accountants UK (copy/paste)

  • “Please list exactly what’s included in the base fee.”
  • “Is the Company Tax Return included or separate from accounts?”
  • “How do you price catch-up work if records are behind?”
  • “What will change after 31 March 2026 for filing?” (GOV.UK)
  • “How do you manage identity verification onboarding from 18 Nov 2025?” (GOV.UK)
  • “How do approvals and access permissions work in the software?”

FAQs

Do I need an accountant for a limited company in the UK?

Many limited companies use limited company accountants UK because of dual filing tracks (Companies House + HMRC) and the ongoing record-keeping required to keep year-end work manageable.

What filings does a limited company accountant handle?

Typically: annual accounts for Companies House and the Company Tax Return for HMRC, plus queries needed to finalise the year (scope varies by package). (GOV.UK)

When are Companies House accounts due?

Private companies generally have 9 months after the end of the accounting reference period to submit accounts. (GOV.UK)

When is Corporation Tax due vs the Company Tax Return?

Corporation Tax payment is usually due 9 months and 1 day after the accounting period ends, while the Company Tax Return deadline is 12 months after the period end. (GOV.UK)

What’s changing in March 2026 for filing?

The joint online filing service closes on 31 March 2026, and you’ll need alternative methods (often commercial software) after that date. (GOV.UK)

What is Companies House identity verification and who needs it?

Identity verification becomes a legal requirement from 18 November 2025, with a phased transition period, applying to directors and PSCs as part of the rollout. (GOV.UK)

What usually costs extra for limited company accountants UK?

Common extras include VAT returns, payroll, bookkeeping, management accounts, catch-up clean-up work, and software migration/setup.

How can I keep accountant fees stable?

Keep records clean monthly, reconcile bank transactions, capture invoices/receipts consistently, and avoid last-minute year-end handovers. This reduces clean-up time.

How do I switch accountants smoothly?

Switch outside peak deadlines, get a clear onboarding plan, and agree access controls and approval steps. Provide last accounts/returns, reconcile the bank, and hand over clean records.

Sources & further reading (official)

Related guides (internal)

Accounting Services Hub
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