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UK Compliance for Remote Founders

Annual Accounts vs Corporation Tax Return:What UK LTD Founders Actually Need to File (and When)

Two filings. Two different UK authorities. And somehow one set of numbers ends up meaning two different things depending on who’s reading it. If you’re running a UK limited company from Pakistan, or from anywhere outside the UK really, this mix-up isn’t a sign you’re bad at compliance. It’s just how the system is built.

Your annual accounts go to Companies House. Your corporation tax return, the CT600, goes to HMRC. Same financial year, sometimes even the same spreadsheet sitting behind both, but they’re not the same document. They don’t land in the same inbox, and filing one does nothing at all for the other. Founders managing a UK company from abroad run into this constantly, usually right after they’ve ticked one box and assumed the second one just ticked itself.

This page goes through what each filing actually is, when each one’s due, and where founders in Pakistan and the wider NRP community tend to get tripped up. No filing tutorials here, just the distinction laid out plainly so you know what applies to your company and when.

Quick Verdict

Here’s the short version.

Public Record

Annual Accounts

Annual accounts go to Companies House. They become a public record of your company’s financial position, and anyone who looks your company up on the register can see them.

Private Filing

Corporation Tax Return (CT600)

The corporation tax return, or CT600, goes to HMRC instead. It works out the tax your company owes, and it stays private. Nobody browsing Companies House will ever see it.

Both are legally required every single year, whether your company is dormant, trading, or just came out of a loss-making year. It doesn’t matter if you’re weighing up dormant company accounts vs tax return obligations, or looking at a company that’s actively trading.

They’re built from the same underlying numbers, but they sit under two different legal frameworks, with two different deadlines and two entirely separate sets of consequences if you miss them.

See the full comparison below.

Comparison Table: Companies House vs HMRC

Two filings, two authorities, two different ways of treating the same year’s numbers. Here’s how they stack up, side by side.

Factor Annual Accounts (Companies House) Corporation Tax Return / CT600 (HMRC)
Recipient authority Companies House HMRC
Purpose Public record of financial position Calculates and reports corporation tax owed
Public visibility Public record, viewable by anyone Private, not publicly accessible
Required even if dormant Yes, dormant companies still file accounts on the same schedule Dormant companies may still need to notify HMRC, depending on trading status
Required even at a loss Yes Yes, a return is still due even with nil tax owed
Standard filing frequency Once per accounting reference period Once per accounting period, though the first period can require two returns
Format standard Statutory format, micro-entity or small company iXBRL tagged computation and return
Penalty structure Escalating fixed penalties, from £150 up to £1,500, doubling for repeated lateness Separate penalty and interest regime, distinct from Companies House
Consequence of persistent non-compliance Risk of company strike-off Risk of HMRC enforcement action, separate from strike-off
Recipient Authority
Annual Accounts
Companies House
CT600
HMRC
Purpose
Annual Accounts
Public record of financial position
CT600
Calculates and reports corporation tax owed
Public Visibility
Annual Accounts
Public record, viewable by anyone
CT600
Private, not publicly accessible
Required Even If Dormant
Annual Accounts
Yes, dormant companies still file accounts on the same schedule
CT600
Dormant companies may still need to notify HMRC, depending on trading status
Required Even At A Loss
Annual Accounts
Yes
CT600
Yes, a return is still due even with nil tax owed
Standard Filing Frequency
Annual Accounts
Once per accounting reference period
CT600
Once per accounting period, though the first period can require two returns
Format Standard
Annual Accounts
Statutory format, micro-entity or small company
CT600
iXBRL tagged computation and return
Penalty Structure
Annual Accounts
Escalating fixed penalties, from £150 up to £1,500, doubling for repeated lateness
CT600
Separate penalty and interest regime, distinct from Companies House
Consequence of Persistent Non-Compliance
Annual Accounts
Risk of company strike-off
CT600
Risk of HMRC enforcement action, separate from strike-off

Not sure which applies to your company’s current stage? Talk to a compliance specialist.

Key Deadlines and Payment Timelines

Once you accept these are two separate filings, the next question is timing. That’s really where the pressure sits.

9 Months
Companies House Filing
From the end of the accounting reference period, private limited companies must file annual accounts.
21 / 3 Months
First Accounts
21 months from incorporation, or 3 months from your accounting reference date, whichever lands later.
12 Months
CT600 Filing (HMRC)
HMRC runs on its own clock entirely. The CT600 is due 12 months after the end of the accounting period.
Payment Comes First

Here’s the part that catches almost everyone out at least once: the corporation tax payment itself is due earlier than the return. Payment falls 9 months and 1 day after period end, a full three months before the CT600 filing deadline. So you’re paying before you file, not the other way round.

Late filing penalties for UK companies from overseas usually trace back to exactly this gap. Someone waits to finish the return before paying, and by the time it’s done, the payment’s already overdue.

The First Year Split

There’s something else that surprises almost everyone in their first year. Call it the HMRC first year accounting period split, and it works like this: a Corporation Tax accounting period legally can’t run longer than 12 months. If your company’s first year of accounts stretches longer than that, which happens all the time when incorporation falls mid-year, HMRC splits it into two separate accounting periods. That means two CT600 filings, each with its own deadline, even though Companies House only wants one set of accounts covering the whole stretch.

The profits don’t get split evenly, and they’re not split by when the money actually came in either. HMRC apportions by a straight daily count across the two periods. That matters more than it should, especially for a company with a strong seasonal spike, say a big Q4 for an online seller, because the daily split doesn’t care that most of the year’s profit landed in one quarter. It splits by days regardless, no exceptions.

Common Founder Confusion (Pakistan & NRP Context)

If any of this sounds familiar, you’re not the only one. These are the three assumptions that keep tripping up founders managing a UK company from Pakistan or elsewhere abroad.

Companies House and HMRC don’t share a filing system, full stop. Submitting your annual accounts satisfies one obligation, the one owed to Companies House. Your CT600 is a separate submission to a separate authority, and it still needs to happen on its own.
A loss doesn’t remove the obligation, it just means the tax owed might land at nil. HMRC still expects a CT600 showing that calculation, and Companies House still expects accounts reflecting the year’s actual position, loss and all.
This one isn’t really about competence, it’s about software. UK statutory accounts and CT600 returns have to be submitted in iXBRL, a specific tagged digital format that HMRC’s and Companies House’s systems can read. A general accounting practice, wherever it’s based, might simply not have that format built into its everyday tools. It’s a compatibility gap, not a skill gap.

One more thing worth knowing: both authorities still lean heavily on physical mail sent to your UK registered office. If nobody’s regularly checking that address, a warning notice can slip by completely, and you only find out once a filing’s already overdue.

The obligation belongs to the UK company itself, not to wherever the founder happens to be sitting. Here’s how the two authorities actually relate to each other.

Authority Breakdown: Companies House vs HMRC

This is the part most guides skip, and it’s the one that explains why the two filings can show different numbers for the same year.

Companies House
Accounts Profit
The figure reported to Companies House under standard accounting rules.
HMRC
Taxable Profit
A different figure altogether, calculated specifically for HMRC.

Your annual accounts show accounts profit, the figure reported to Companies House under standard accounting rules. Your CT600 works from a different figure altogether, taxable profit, calculated specifically for HMRC. Both numbers start from the same trading activity, but they rarely land on the same amount.

Why the gap? Certain costs get treated one way in your accounts and another way for tax purposes. Client entertainment, for instance, might sit in your accounts as a normal business expense, but HMRC won’t let it reduce your taxable profit. Depreciation on equipment works in a similar way: it shows up in your accounts, but HMRC swaps it out for its own capital allowances calculation when it comes to tax.

There’s a second layer worth knowing too. Your annual accounts aren’t just a compliance document sitting in a drawer somewhere, they’re public. UK partners, suppliers, even a bank reviewing your company will sometimes check the Companies House register to see whether you’re filing as small or micro, and whether your accounts look properly maintained. It’s not the main reason to get this right, but it’s a quiet side effect of that public record status mentioned in the table above.

Same starting numbers, two different legal lenses applied to them. Getting your head around this one distinction clears up most of the “why don’t these figures match” confusion founders run into once they lay their two filings side by side.

Which Filing Applies to You, and When

Both filings are mandatory, so there’s no “pick one” decision to make here. What actually changes is which risks matter most at each stage of your company’s life.

Newly Incorporated, Not Yet Trading

Even before any HMRC corporation tax activity kicks in, a Companies House filing obligation is already sitting on the horizon. The clock on your first accounts starts from incorporation, not from your first sale.

First Trading YearHighest Risk

This is the highest-risk stage, largely because of the two-CT600 scenario covered above. If your first accounting period runs long, you could owe HMRC two separate returns for what feels like one financial year.

Established and Trading Normally

Once you’re past year one, both filings settle into an annual rhythm. The risk shifts away from confusion about what’s owed and toward straightforward deadline management, which gets tricky when you’re tracking UK dates from a different time zone.

Loss-Making or Break-Even Year

Both filings are still due, no exceptions. This is exactly the stage where the “no profit, no filing” assumption causes the most missed HMRC deadlines.

Managing your first trading year?

Common Mistakes When Managing Both Filings

Four patterns keep showing up with founders managing UK compliance from a distance. None of these really come down to carelessness, they’re about a two-authority structure that’s genuinely easy to misread.

The “One-and-Done” Myth

Assuming a Companies House filing automatically updates HMRC. It doesn’t, and it never has. Each authority needs its own submission, on its own schedule.

The “No Profit” Fallacy

Believing a loss-making or nil-profit year removes the CT600 obligation. It doesn’t. A return showing nil tax owed is still a required return.

Format Errors

Handing UK filings to an accountant whose software doesn’t produce iXBRL, something that comes up fairly often when bookkeeping is managed from Pakistan by someone without direct UK filing tools.

Deadline Blind Spots

Tracking only one authority’s calendar and missing the other’s entirely, especially when postal or portal notices go to a UK registered address that nobody’s actually checking day to day.

Avoid all this by having both filings managed under one point of accountability.

Compliance Sequencing Recommendation

There’s no “better option” between these two filings since both are required regardless. What actually helps is getting the order of attention right.

Start with your accounting reference period and accounts deadline

This anchors your entire reporting timeline, since everything else, including whether your first year triggers one or two CT600 returns, flows from that single date. Once that’s confirmed, you can work out your HMRC accounting period split, if one even applies to you.

This isn’t a choice between Companies House and HMRC, it’s a tracking exercise across both of them. Founders managing a UK company remotely tend to do best with a single provider tracking both calendars, rather than splitting the two filings across separate advisors who aren’t necessarily talking to each other.

Frequently Asked Questions

Yes, both, every year. These are two separate legal obligations owed to two separate authorities. Filing one doesn’t satisfy the other, and neither goes away just because your company isn’t actively trading.
Your annual accounts show accounts profit, calculated under standard accounting treatment. Your CT600 works from taxable profit instead, a separate calculation where certain costs, like client entertainment or depreciation, get treated quite differently than they do in your accounts. The two figures can diverge even in a loss-making year, and a CT600 is still due either way.
Centralized tracking tends to be the most reliable approach, ideally through a single compliance partner who watches Companies House and HMRC deadlines together instead of treating them as two unrelated tasks. This matters even more when you’re not physically present to catch a UK postal notice landing on the doormat.
Get Your UK Compliance Handled from Pakistan

One Provider. Two Filings. No Mismatch Between Them.

Your UK company’s compliance obligations follow the company itself.

Not wherever you happen to be sitting. Whether you’re in Islamabad, Karachi, Dubai, or anywhere else managing a UK LTD remotely, the deadlines don’t move, and neither does the requirement to track both authorities properly.

If you already know which filing you need, go straight to it: file your annual accounts or use our corporation tax filing service. If you’d rather have both reviewed together, .

This page is informational and doesn’t constitute tax advice. For specific tax computations or company-specific guidance, speak with a qualified professional.

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